Merge branch 'master' of https://gitlab.steamware.net/egaltech/EgtGeomKernel

- ricompilazione con cambio versione.

CurveArc.cpp

@@ -41,7 +41,7 @@ GEOOBJ_REGISTER( CRV_ARC, NGE_C_ARC, CurveArc) ;
 class ArcApproxer
 {
    public :
-      ArcApproxer( double dLinTol, double dAngTolDeg, bool bInside, const CurveArc& arArc) ;
+      ArcApproxer( double dLinTol, double dAngTolDeg, bool bInside, const CurveArc& arArc, double dMaxLen = INFINITO) ;
       bool GetPoint( double& dU, Point3d& ptP) ;
 
    private :
@@ -1177,6 +1177,30 @@ CurveArc::ApproxWithLines( double dLinTol, double dAngTolDeg, int nType, PolyLin
    return true ;
 }
 
+//----------------------------------------------------------------------------
+bool
+CurveArc::ApproxWithLimitedLines( double dLinTol, double dAngTolDeg, int nType, double dMaxLen, PolyLine& PL) const
+{
+   // pulisco la polilinea
+   PL.Clear() ;
+
+   // la curva deve essere validata
+   if ( m_nStatus != OK)
+      return false ;
+
+   // eseguo approssimazione
+   bool bInside = true ;
+   ArcApproxer aAppr( dLinTol, dAngTolDeg, bInside, *this, dMaxLen) ;
+   double  dU ;
+   Point3d ptPos ;
+   while ( aAppr.GetPoint( dU, ptPos)) {
+      if ( ! PL.AddUPoint( dU, ptPos))
+         return false ;
+   }
+
+   return true ;
+}
+
 //----------------------------------------------------------------------------
 bool
 CurveArc::ApproxWithArcs( double dLinTol, double dAngTolDeg, PolyArc& PA) const
@@ -2170,7 +2194,7 @@ CurveArc::Flip( void)
 // usando il versore medio dal centro e moltiplicandolo per il coefficiente ( 2 / ( 1 + cosA)).
 // Il versore dell'ultimo punto è già stato calcolato per il penultimo.
 //----------------------------------------------------------------------------
-ArcApproxer::ArcApproxer( double dLinTol, double dAngTolDeg, bool bInside, const CurveArc& arArc)
+ArcApproxer::ArcApproxer( double dLinTol, double dAngTolDeg, bool bInside, const CurveArc& arArc, double dMaxLen)
 {
   // inizializzazioni
    m_nTotPnt = 0 ;
@@ -2195,6 +2219,11 @@ ArcApproxer::ArcApproxer( double dLinTol, double dAngTolDeg, bool bInside, const
       dAngStepDeg = sqrt( 8 * dLinTolRel) * RADTODEG ;
    else
       dAngStepDeg = sqrt( 8 * dLinTolRel / ( 1 + dLinTolRel)) * RADTODEG ;
+
+   if ( dMaxLen < INFINITO) {
+      double dAngStepMaxLen = 2 * asin( dMaxLen / ( 2 * arArc.GetRadius()))  * RADTODEG ;
+      dAngStepDeg = min( dAngStepDeg, dAngStepMaxLen) ;
+   }
    dAngStepDeg = min( dAngStepDeg, dAngTolDeg) ;
 
   // dall'angolo al centro ricavo il numero di passi

CurveArc.h

@@ -111,6 +111,7 @@ class CurveArc : public ICurveArc, public IGeoObjRW
       bool GetArea( Plane3d& plPlane, double& dArea) const override 
               { return CurveGetArea( *this, plPlane, dArea) ; }
       bool ApproxWithLines( double dLinTol, double dAngTolDeg, int nType, PolyLine& PL) const override ;
+      bool ApproxWithLimitedLines( double dLinTol, double dAngTolDeg, int nType, double dMaxLen, PolyLine& PL) const override ;
       bool ApproxWithArcs( double dLinTol, double dAngTolDeg, PolyArc& PA) const override ;
       bool ApproxWithArcsEx( double dLinTol, double dAngTolDeg, double dLinFea, PolyArc& PA) const override
               { return ApproxWithArcs( dLinTol, dAngTolDeg, PA) ; }

CurveAux.cpp

@@ -2652,7 +2652,7 @@ ResetCurveVoronoi( const ICurve& crvC)
 
 //----------------------------------------------------------------------------
 bool
-GetChainedCurves( ICRVCOMPOPOVECTOR& vCrv, double dChainTol, bool bAllowInvert)
+GetChainedCurves( ICRVCOMPOPOVECTOR& vCrv, double dChainTol, bool bAllowInvert, bool bHaltOnFork)
 {
    if ( ssize( vCrv) == 1)
       return true ;
@@ -2670,7 +2670,7 @@ GetChainedCurves( ICRVCOMPOPOVECTOR& vCrv, double dChainTol, bool bAllowInvert)
    }
    INTVECTOR vIds ;
    Point3d ptStart = ORIG ;
-   while ( chainCrv.GetChainFromNear( ptStart, false, vIds)) {
+   while ( chainCrv.GetChainFromNear( ptStart, bHaltOnFork, vIds)) {
       int nFirst = vIds[0] ;
       bool bInvert = false ;
       if ( nFirst < 0)
@@ -2703,6 +2703,18 @@ GetChainedCurves( ICRVCOMPOPOVECTOR& vCrv, double dChainTol, bool bAllowInvert)
    return true ;
 }
 
+//----------------------------------------------------------------------------
+double
+CalcWeightVal( double dLen, const ICurve* pCrv, const Vector3d vtCurr1, const Point3d& ptCurr1, double dCoeff, double dMyDist, double& dUStep2)
+{
+   pCrv->GetParamAtLength( dLen, dUStep2) ;
+   Point3d ptStep2 ; Vector3d vtStep2 = V_NULL ;
+   pCrv->GetPointD1D2( dUStep2, ICurve::FROM_MINUS, ptStep2, &vtStep2) ; vtStep2.Normalize() ;
+   double dStepCos2 = vtCurr1 * vtStep2 ;
+   double dDist = Dist( ptCurr1, ptStep2) ;
+   return (1 - dStepCos2) + dCoeff * dDist / dMyDist ;
+}
+
 //----------------------------------------------------------------------------
 bool
 GetIsoPointOnSecondCurve( const ICurve* pCrvEdge1, const ICurve* pCrvEdge2, double dUCurr1, double& dUCurr2, double dMyDist, double dUPrev2,
@@ -2790,6 +2802,11 @@ GetIsoPointOnSecondCurve( const ICurve* pCrvEdge1, const ICurve* pCrvEdge2, doub
    const double COS_SMALL_ANG_TOL = cos( 4. * DEGTORAD) ;
    double dSearchLen = dMyDist / 2 ;
    int NUM_STEP = 10 ;
+   const double dCoeff = 0.1 ;
+   double dCos = vtCurr1 * vtCurr2 ;
+   double dDistCurr = Dist( ptCurr1, ptCurr2) ;
+   double dMin = (1 - dCos) + dCoeff * dDistCurr / dMyDist ;
+   double bUpdated = false ;
    // se poco fuori tolleranza controllo se ho un punto abbastanza vicino con la stessa tangente
    if ( vtCurr1 * vtCurr2 < COS_SMALL_ANG_TOL) {
       // Se tanto fuori dalla tolleranza, recupero il miglior versore tangente sul secondo bordo nell'intervallo successivo di lunghezza ( 2. * dMyDist)
@@ -2800,25 +2817,41 @@ GetIsoPointOnSecondCurve( const ICurve* pCrvEdge1, const ICurve* pCrvEdge2, doub
       pCrvEdge2->GetLengthAtPoint( ptCurr2, dLenCurr2) ;
       double dLimInfLen2 = Clamp( dLenCurr2 - dSearchLen, dLenPrev2, dLen2) ;
       double dLimSupLen2 = Clamp( dLenCurr2 + dSearchLen, dLenPrev2, dLen2) ;
-      // [Controllo migliorabile, magari mendiante metodo di bisezione (?)]
-      
-      double dMin = INFINITO ;
-      const double dCoeff = 0.1 ;
+
+      // faccio un campionamento grossolano e poi campiono più finemente in prossimità dei minimi
+      DBLVECTOR vVal ;
       for ( int i = 0 ; i <= NUM_STEP ; ++ i) {
          double dLen = dLimInfLen2 + i * ( dLimSupLen2 - dLimInfLen2) / NUM_STEP ;
-         double dUStep2 ; pCrvEdge2->GetParamAtLength( dLen, dUStep2) ;
-         Point3d ptStep2 ; Vector3d vtStep2 = V_NULL ;
-         pCrvEdge2->GetPointD1D2( dUStep2, ICurve::FROM_MINUS, ptStep2, &vtStep2) ; vtStep2.Normalize() ;
-         double dStepCos2 = vtCurr1 * vtStep2 ;
-         double dDist = Dist( ptCurr1, ptCurr2) ;
-         double dVal = (1 - dStepCos2) + dCoeff * dDist / dMyDist ;
-         if ( dVal < dMin) {
-            ptCurr2 = ptStep2 ;
-            vtCurr2 = vtStep2 ;
+         double dUStep2 ;
+         vVal.push_back( CalcWeightVal( dLen, pCrvEdge2, vtCurr1, ptCurr1, dCoeff, dMyDist, dUStep2)) ;
+         if ( vVal.back() < dMin) {
+            dMin = vVal.back() ;
             dUCurr2 = dUStep2 ;
-            dMin = dVal ;
+         }
+      }
+      DBLDBLVECTOR vInterv ;
+      for ( int i = 1 ; i < ssize(vVal) - 1 ; ++i) {
+         if ( vVal[i] < vVal[i-1]  && vVal[i] < vVal[i+1])
+            vInterv.emplace_back( dLimInfLen2 + ( i - 1) * ( dLimSupLen2 - dLimInfLen2) / NUM_STEP,
+                                  dLimInfLen2 + ( i + 1) * ( dLimSupLen2 - dLimInfLen2) / NUM_STEP) ;
+      }
+      if ( ssize( vInterv) != 0) {
+         for ( int j = 0 ; j < ssize( vInterv) ; ++j) {
+            for ( int i = 0 ; i <= NUM_STEP ; ++ i) {
+               double dLen = vInterv[j].first + i * ( vInterv[j].second - vInterv[j].first) / NUM_STEP ;
+               double dUStep2 ;
+               double dVal = CalcWeightVal( dLen, pCrvEdge2, vtCurr1, ptCurr1, dCoeff, dMyDist, dUStep2) ;
+               if ( dVal < dMin) {
+                  dUCurr2 = dUStep2 ;
+                  dMin = dVal ;
+                  bUpdated = true ;
+               }
+            }
          }
       }
    }
+   // se il parametro è cambiato devo ricalcolare la lunghezza, che viene restituita
+   if ( bUpdated)
+      pCrvEdge2->GetLengthAtParam( dUCurr2, dLenCurr2) ;
    return true ;
 }

CurveAux.h

@@ -34,5 +34,4 @@ bool CurveDump( const ICurve& crvC, std::string& sOut, bool bMM, const char* szN
 bool CopyExtrusion( const ICurve* pSouCrv, ICurve* pDestCrv) ;
 bool CopyThickness( const ICurve* pSouCrv, ICurve* pDestCrv) ;
 ICurveBezier* ApproxCurveBezierWithSingleCubic( const ICurve* pCrv) ;
-Voronoi* GetCurveVoronoi( const ICurve& crvC) ;
-bool GetChainedCurves( ICRVCOMPOPOVECTOR& vCrv, double dChainTol, bool bAllowInvert) ;
+Voronoi* GetCurveVoronoi( const ICurve& crvC) ;

CurveBezier.cpp

@@ -1432,7 +1432,7 @@ CurveBezier::ApproxWithLines( double dLinTol, double dAngTolDeg, int nType, Poly
 //----------------------------------------------------------------------------
 bool
 CurveBezier::FlatOrSplit( int nLev, const CurveBezier& crvBez, double dParStart, double dParEnd,
-                          double dLinTol, double dAngTolDeg, PolyLine& PL) const
+                          double dLinTol, double dAngTolDeg, PolyLine& PL, double dMaxLen) const
 {
   // se raggiunto il massimo livello di recursione ...
    const int MAX_LEV = 10 ;
@@ -1461,7 +1461,10 @@ CurveBezier::FlatOrSplit( int nLev, const CurveBezier& crvBez, double dParStart,
    }
 
   // se distanza entro tolleranza
-   if ( dMaxSqDist <= ( dLinTol * dLinTol)) {
+   bool bSplit = dMaxSqDist > ( dLinTol * dLinTol) ;
+   if ( dMaxLen < INFINITO)
+      bSplit = bSplit  ||  Dist( crvBez.m_vPtCtrl[0], crvBez.m_vPtCtrl[m_nDeg]) > dMaxLen ;
+   if ( ! bSplit) {
      // deviazione angolare tra primo e ultimo tratto del poligono di controllo (grado >= 1)
       Vector3d vtDirI = crvBez.m_vPtCtrl[1] - crvBez.m_vPtCtrl[0] ;
       Vector3d vtDirF = crvBez.m_vPtCtrl[m_nDeg] - crvBez.m_vPtCtrl[m_nDeg-1] ;
@@ -1495,18 +1498,65 @@ CurveBezier::FlatOrSplit( int nLev, const CurveBezier& crvBez, double dParStart,
      // prima metà
       crvBez1 = crvBez ;
       crvBez1.TrimEndAtParam( dParDiv) ;
-      if ( ! FlatOrSplit( nLev + 1, crvBez1, dParStart, dParMid, dLinTol, dAngTolDeg, PL))
+      if ( ! FlatOrSplit( nLev + 1, crvBez1, dParStart, dParMid, dLinTol, dAngTolDeg, PL, dMaxLen))
          return false ;
      // seconda metà
       crvBez1 = crvBez ;
       crvBez1.TrimStartAtParam( dParDiv) ;
-      if ( ! FlatOrSplit( nLev + 1, crvBez1, dParMid, dParEnd, dLinTol, dAngTolDeg, PL))
+      if ( ! FlatOrSplit( nLev + 1, crvBez1, dParMid, dParEnd, dLinTol, dAngTolDeg, PL, dMaxLen))
          return false ;
    }
 
    return true ;
 }
 
+//----------------------------------------------------------------------------
+bool
+CurveBezier::ApproxWithLimitedLines( double dLinTol, double dAngTolDeg, int nType, double dMaxLen, PolyLine& PL) const
+{
+   // pulisco la polilinea
+   PL.Clear() ;
+
+   // la curva deve essere validata
+   if ( m_nStatus != OK)
+      return false ;
+
+   // se di primo grado, basta inserire gli estremi
+   if ( m_nDeg == 1) {
+      PL.AddUPoint( 0, m_vPtCtrl[0]) ;
+      PL.AddUPoint( 1, m_vPtCtrl[m_nDeg]) ;
+      PL.AdjustForMaxSegmentLen( dMaxLen) ;
+      return true ;
+   }
+
+   // limiti minimi su tolleranza e deviazione angolare
+   dLinTol = max( dLinTol, LIN_TOL_MIN) ;
+   dAngTolDeg = max( dAngTolDeg, ANG_TOL_MIN_DEG) ;
+
+   // inserisco il punto iniziale
+   if ( ! PL.AddUPoint( 0, m_vPtCtrl[0]))
+      return false ;
+
+   // verifico se va divisa
+   if ( ! FlatOrSplit( 0, *this, 0, 1, dLinTol, dAngTolDeg, PL, dMaxLen))
+      return false ;
+
+   // se è stato inserito un solo punto, aggiungo il finale
+   if ( PL.GetPointNbr() == 1)
+      return PL.AddUPoint( 1, m_vPtCtrl[m_nDeg]) ;
+   // altrimenti, se l'ultimo punto non coincide con il finale lo sostituisco (distano al max di dLinTol)
+   else {
+      Point3d  ptLast ;
+      PL.GetLastPoint( ptLast) ;
+      if ( ! AreSamePointApprox( ptLast, m_vPtCtrl[m_nDeg])) {
+         PL.EraseLastUPoint() ;
+         return PL.AddUPoint( 1, m_vPtCtrl[m_nDeg]) ;
+      }
+   }
+
+   return true ;
+}
+
 //----------------------------------------------------------------------------
 bool
 CurveBezier::ApproxWithArcs( double dLinTol, double dAngTolDeg, PolyArc& PA) const

CurveBezier.h

@@ -111,6 +111,7 @@ class CurveBezier : public ICurveBezier, public IGeoObjRW
       bool GetArea( Plane3d& plPlane, double& dArea) const override 
               { return CurveGetArea( *this, plPlane, dArea) ; }
       bool ApproxWithLines( double dLinTol, double dAngTolDeg, int nType, PolyLine& PL) const override ;
+      bool ApproxWithLimitedLines( double dLinTol, double dAngTolDeg, int nType, double dMaxLen, PolyLine& PL) const override ;
       bool ApproxWithArcs( double dLinTol, double dAngTolDeg, PolyArc& PA) const override ;
       bool ApproxWithArcsEx( double dLinTol, double dAngTolDeg, double dLinFea, PolyArc& PA) const override
               { return ApproxWithArcs( dLinTol, dAngTolDeg, PA) ; }
@@ -188,7 +189,7 @@ class CurveBezier : public ICurveBezier, public IGeoObjRW
       bool GetSegmentParam( double dLen, double& dCurrLen, double& dSegLen,
                             double& dUIni, double& dUFin) const ;
       bool FlatOrSplit( int nLev, const CurveBezier& crvBez, double dParStart, double dParEnd,
-                        double dLinTol, double dAngTolDeg, PolyLine& PL) const ;
+                        double dLinTol, double dAngTolDeg, PolyLine& PL, double dMaxLen = INFINITO) const ;
       bool ApproxWithArcsXY(double dLinTol, double dAngTolDeg, PolyArc& PA) const;
       bool BiArcOrSplit(int nLev, PolyLine& PL, double dLinTol, double dAngTolDeg, PolyArc& PA) const;
       bool ToPowerBase( PolynomialPoint3d& pol3P) const ;

CurveComposite.cpp

@@ -1460,6 +1460,68 @@ CurveComposite::ApproxWithLines( double dLinTol, double dAngTolDeg, int nType, P
    return PL.RemoveAlignedPoints( dLinTol) ;
 }
 
+//----------------------------------------------------------------------------
+bool
+CurveComposite::ApproxWithLimitedLines( double dLinTol, double dAngTolDeg, int nType, double dMaxLen, PolyLine& PL) const
+{
+   // funziona solo con le modalità standard e special
+   if ( nType != APL_STD  &&  nType != APL_SPECIAL  &&  nType != APL_SPECIAL_INT)
+      return false ;
+
+   // pulisco la polilinea
+   PL.Clear() ;
+
+   // verifico lo stato
+   if ( m_nStatus != OK)
+      return false ;
+
+   // limiti minimi su tolleranza e deviazione angolare
+   dLinTol = max( dLinTol, LIN_TOL_MIN) ;
+   dAngTolDeg = max( dAngTolDeg, ANG_TOL_MIN_DEG) ;
+
+   // se speciale, approssimo ogni singola entità e conservo le estremità interne (joint)
+   if ( nType == APL_SPECIAL  ||  nType == APL_SPECIAL_INT) {
+      // eseguo approssimazione
+      double dStartPar = 0 ;
+      for ( auto& pCrv : m_CrvSmplS) {
+         // assegno estrusione e spessore della curva composita
+         pCrv->SetExtrusion( m_VtExtr) ;
+         pCrv->SetThickness( m_dThick) ;
+         // recupero approssimazione per curva semplice
+         PolyLine PLSmpl ;
+         if ( ! pCrv->ApproxWithLimitedLines( dLinTol, dAngTolDeg, nType, dMaxLen, PLSmpl))
+            return false ;
+         // se richiesto almeno un punto interno con curve non rettilinee e ci sono solo gli estremi
+         if ( nType == APL_SPECIAL_INT  &&  pCrv->GetType() != CRV_LINE  &&  PLSmpl.GetPointNbr() == 2) {
+            //  aggiungo il punto interno
+            Point3d ptMid ;
+            if ( ! pCrv->GetMidPoint( ptMid))
+               return false ;
+            double dU ;
+            PLSmpl.GetLastU( dU) ;
+            dU /= 2 ;
+            PNTULIST& List = PLSmpl.GetUPointList() ;
+            List.insert( ++ List.begin(), { ptMid, dU}) ;
+         }
+         // ripristino estrusione e spessore della curva semplice (annullandoli)
+         pCrv->SetExtrusion( V_NULL) ;
+         pCrv->SetThickness( 0) ;
+         // la accodo opportunamente a quella della curva composita
+         if ( ! PL.Join( PLSmpl, dStartPar))
+            return false ;
+         // incremento inizio parametro per prossima curva semplice
+         dStartPar += 1 ;
+      }
+   }
+   else if ( nType == APL_STD) {
+      if ( ! ApproxWithLimitedLines( dLinTol, dAngTolDeg, APL_SPECIAL, dMaxLen, PL))
+         return false ;
+      PL.RemoveAlignedPoints( dLinTol, false, dMaxLen) ;
+   }
+
+   return true ;
+}
+
 //----------------------------------------------------------------------------
 bool
 CurveComposite::ApproxWithArcs( double dLinTol, double dAngTolDeg, PolyArc& PA) const

CurveComposite.h

@@ -112,6 +112,7 @@ class CurveComposite : public ICurveComposite, public IGeoObjRW
       bool GetArea( Plane3d& plPlane, double& dArea) const override 
               { return CurveGetArea( *this, plPlane, dArea) ; }
       bool ApproxWithLines( double dLinTol, double dAngTolDeg, int nType, PolyLine& PL) const override ;
+      bool ApproxWithLimitedLines( double dLinTol, double dAngTolDeg, int nType, double dMaxLen, PolyLine& PL) const override ;
       bool ApproxWithArcs( double dLinTol, double dAngTolDeg, PolyArc& PA) const override ;
       bool ApproxWithArcsEx( double dLinTol, double dAngTolDeg, double dLinFea, PolyArc& PA) const override ;
       ICurve* CopyParamRange( double dUStart, double dUEnd) const override ;

CurveLine.cpp

@@ -514,6 +514,34 @@ CurveLine::ApproxWithLines( double dLinTol, double dAngTolDeg, int nType, PolyLi
    return true ;
 }
 
+//----------------------------------------------------------------------------
+bool
+CurveLine::ApproxWithLimitedLines( double dLinTol, double dAngTolDeg, int nType, double dMaxLen, PolyLine& PL) const
+{
+   // pulisco la polilinea
+   PL.Clear() ;
+
+   // la curva deve essere validata
+   if ( m_nStatus != OK)
+      return false ;
+
+   // inserisco lo start
+   PL.AddUPoint( 0, m_PtStart) ;
+
+   double dLen = Dist( m_PtStart, m_PtEnd) ;
+   if ( dLen > dMaxLen) {
+      int nStep = int( ceil( dLen / dMaxLen)) ;
+      for ( int i = 1 ; i < nStep ; ++i) {
+         double dPar = 1. / nStep * i ;
+         PL.AddUPoint( dPar, Media( m_PtStart, m_PtEnd, dPar)) ;
+      }
+   }
+   // inserisco l'end
+   PL.AddUPoint( 1, m_PtEnd) ;
+
+   return true ;
+}
+
 //----------------------------------------------------------------------------
 bool
 CurveLine::ApproxWithArcs( double dLinTol, double dAngTolDeg, PolyArc& PA) const

CurveLine.h

@@ -112,6 +112,7 @@ class CurveLine : public ICurveLine, public IGeoObjRW
       bool GetArea( Plane3d& plPlane, double& dArea) const override
               { return false ; }
       bool ApproxWithLines( double dLinTol, double dAngTolDeg, int nType, PolyLine& PL) const override ;
+      bool ApproxWithLimitedLines( double dLinTol, double dAngTolDeg, int nType, double dMaxLen, PolyLine& PL) const override ;
       bool ApproxWithArcs( double dLinTol, double dAngTolDeg, PolyArc& PA) const override ;
       bool ApproxWithArcsEx( double dLinTol, double dAngTolDeg, double dLinFea, PolyArc& PA) const override
               { return ApproxWithArcs( dLinTol, dAngTolDeg, PA) ; }

EgtGeomKernel.vcxproj

@@ -324,6 +324,7 @@ copy $(TargetPath) \EgtProg\Dll64</Command>
     <ClCompile Include="IntersLineVolZmap.cpp" />
     <ClCompile Include="IntersPlaneVolZmap.cpp" />
     <ClCompile Include="IntersLineSurfBez.cpp" />
+    <ClCompile Include="OffsetCurve3d.cpp" />
     <ClCompile Include="Trimming.cpp" />
     <ClCompile Include="MultiGeomDB.cpp" />
     <ClCompile Include="SurfTriMeshOffset.cpp" />

EgtGeomKernel.vcxproj.filters

@@ -576,6 +576,9 @@
     <ClCompile Include="Trimming.cpp">
       <Filter>File di origine\GeoStriping</Filter>
     </ClCompile>
+    <ClCompile Include="OffsetCurve3d.cpp">
+      <Filter>File di origine\GeoOffset</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="stdafx.h">

IntersLineCyl.cpp

@@ -15,6 +15,7 @@
 #include "stdafx.h"
 #include "IntersLineCyl.h"
 #include "/EgtDev/Include/EGkFrame3d.h"
+#include "/EgtDev/Include/EGkIntersLineCylinder.h"
 #include "/EgtDev/Include/ENkPolynomialRoots.h"
 
 using namespace std ;
@@ -25,99 +26,176 @@ using namespace std ;
 // In caso di intersezione viene restituito true e i parametri in dU1 e dU2.
 //----------------------------------------------------------------------------
 bool
-IntersLineCyl( const Point3d& ptL, const Vector3d& vtL,
-               double dRad, double dHeight,
-               double& dU1, double& dU2)
+IntersLineCyl( const Point3d& ptP, const Vector3d& vtV, double dH, double dRad, bool bTapLow, bool bTapUp,
+               double& dU1, Point3d& ptInt1, Vector3d& vtN1, double& dU2, Point3d& ptInt2, Vector3d& vtN2, bool bIgnoreTap, bool bInvertNormals)
 {
-  // Verifico il versore
-   if ( vtL.IsSmall())
+   dU1 = NAN ;
+   dU2 = NAN ;
+
+   // Verifico il versore
+   if ( vtV.IsSmall())
       return false ;
 
-  // Verifico il cilindro
-   if ( dRad < EPS_SMALL  ||  dHeight < EPS_SMALL)
+   // Verifico il cilindro
+   if ( dRad < EPS_SMALL  ||  dH < EPS_SMALL)
       return false ;
 
-  // Determino le eventuali intersezioni con le due basi a quota minima e massima (solo se linea non parallela ad esse)
+   // Determino le eventuali intersezioni con le due basi a quota minima e massima (solo se linea non parallela ad esse)
    int nBasInt = 0 ;
-   if ( abs( vtL.z) > EPS_ZERO) {
+   if ( abs( vtV.z) > EPS_ZERO) {
       // le linee tangenti al cilindro non sono considerate intersecanti
-      double EpsRad = ( vtL.IsZeroXY() ? - EPS_SMALL : EPS_SMALL) ;
-      Point3d ptInt1 = ptL + ( ( 0 - ptL.z) / vtL.z) * vtL ;
-      if ( ptInt1.x * ptInt1.x + ptInt1.y * ptInt1.y < dRad * dRad + 2 * dRad * EpsRad) {
-         dU1 = ( ptInt1 - ptL) * vtL ;
+      double dEpsRad = ( vtV.IsZeroXY() ? - EPS_SMALL : EPS_SMALL) ;
+      if ( bIgnoreTap)
+         dEpsRad = 0. ;
+      ptInt1 = ptP + ( ( 0 - ptP.z) / vtV.z) * vtV ;
+      if ( ptInt1.x * ptInt1.x + ptInt1.y * ptInt1.y < dRad * dRad + 2 * dRad * dEpsRad) {
          nBasInt += 1 ;
+         vtN1 = - Z_AX ;
+         dU1 = ( ( 0 - ptP.z) / vtV.z) ;
       }
-      Point3d ptInt2 = ptL + ( ( dHeight - ptL.z) / vtL.z) * vtL ;  
-      if ( ptInt2.x * ptInt2.x + ptInt2.y * ptInt2.y < dRad * dRad + 2 * dRad * EpsRad) {
-         dU2 = ( ptInt2 - ptL) * vtL ;
+      ptInt2 = ptP + ( ( dH - ptP.z) / vtV.z) * vtV ;  
+      if ( ptInt2.x * ptInt2.x + ptInt2.y * ptInt2.y < dRad * dRad + 2 * dRad * dEpsRad) {
          nBasInt += 2 ;
+         vtN2 = Z_AX ;
+         dU2 = ( ( dH - ptP.z) / vtV.z) ;
       }
    }
 
-  // Se la linea interseca entrambe le basi, si sono trovate le due intersezioni
+   // Se la linea interseca entrambe le basi, si sono trovate le due intersezioni
    if ( nBasInt == 3) {
-      if ( dU1 > dU2)
+      if ( dU1 > dU2) {
          swap( dU1, dU2) ;
-     // Trovate intersezioni
+         swap( ptInt1, ptInt2) ;
+         swap( vtN1, vtN2) ;
+      }
+      if ( bInvertNormals) {
+         vtN1 *= - 1 ;
+         vtN2 *= - 1 ;
+      }
+      // Trovate intersezioni
       return true ;
    }
-   
-  // Determino le intersezioni con la superficie laterale del cilindro
-   DBLVECTOR vdCoeff{ ptL.x * ptL.x + ptL.y * ptL.y - dRad * dRad,
-                      2 * ( ptL.x * vtL.x + ptL.y * vtL.y),
-                      vtL.x * vtL.x + vtL.y * vtL.y} ;
+
+   // Determino le intersezioni con la superficie laterale del cilindro
+   DBLVECTOR vdCoeff{ ptP.x * ptP.x + ptP.y * ptP.y - dRad * dRad,
+                      2 * ( ptP.x * vtV.x + ptP.y * vtV.y),
+                      vtV.x * vtV.x + vtV.y * vtV.y} ;
    DBLVECTOR vdRoots ;
    int nRoot = PolynomialRoots( 2, vdCoeff, vdRoots) ;
 
-  // Elimino le soluzioni cha danno intersezioni fuori dai limiti in Z del cilindro
+   // Epsilon per piani di tappo
+   double dEpsLow = ( bTapLow ? - EPS_SMALL : EPS_SMALL) ;
+   double dEpsUp = ( bTapUp ? EPS_SMALL : - EPS_SMALL) ;
+   if ( bIgnoreTap) {
+      dEpsLow = 0. ;
+      dEpsUp = 0. ;
+   }
+
+   // Elimino le soluzioni cha danno intersezioni fuori dai limiti in Z del cilindro
    if ( nRoot == 2) {
-      double dIntZ2 = ptL.z + vdRoots[1] * vtL.z ;
-      if ( dIntZ2 < 0 - EPS_SMALL  ||  dIntZ2 > dHeight + EPS_SMALL)
+      double dIntZ2 = ptP.z + vdRoots[1] * vtV.z ;
+      if ( dIntZ2 < 0 + dEpsLow  ||  dIntZ2 > dH + dEpsUp)
          -- nRoot ;
    }
    if ( nRoot >= 1) {
-      double dIntZ1 = ptL.z + vdRoots[0] * vtL.z ;
-      if ( dIntZ1 < 0 - EPS_SMALL  ||  dIntZ1 > dHeight + EPS_SMALL) {
+      double dIntZ1 = ptP.z + vdRoots[0] * vtV.z ;
+      if ( dIntZ1 < 0 + dEpsLow  ||  dIntZ1 > dH + dEpsUp) {
          if ( nRoot == 2)
             vdRoots[0] = vdRoots[1] ;
          -- nRoot ;
       }
    }
 
-  // Due soluzioni: la retta interseca due volte la superficie laterale
+   // Due soluzioni: la retta interseca due volte la superficie laterale
    if ( nRoot == 2) {
+      // Punti di intersezione con la superficie del cilindro
+      ptInt1 = ptP + vdRoots[0] * vtV ;
+      ptInt2 = ptP + vdRoots[1] * vtV ;
       dU1 = vdRoots[0] ;
       dU2 = vdRoots[1] ;
-      if ( dU1 > dU2)
+      // Determino le normali
+      vtN1.Set( ptInt1.x, ptInt1.y, 0) ;
+      vtN1.Normalize() ;
+      vtN2.Set( ptInt2.x, ptInt2.y, 0) ;
+      vtN2.Normalize() ;
+      if ( dU1 > dU2) {
          swap( dU1, dU2) ;
-     // Trovate intersezioni
-      return true ;
-   }
-   
-  // Una soluzione : la retta interseca la superficie laterale e un piano
-   else if ( nRoot == 1) {
-     // Se piano superiore
-      if ( nBasInt == 2) {
-         dU1 = vdRoots[0] ;
+         swap( ptInt1, ptInt2) ;
+         swap( vtN1, vtN2) ;
       }
-     // altrimenti piano inferiore
-      else if ( nBasInt == 1) {
-         dU2 = vdRoots[0] ;
+      if ( bInvertNormals) {
+         vtN1 *= - 1 ;
+         vtN2 *= - 1 ;
       }
-     // altrimenti niente
-      else
-         return false ;
-      if ( dU1 > dU2)
-         swap( dU1, dU2) ;
-     // Trovate intersezioni
+      // Trovate intersezioni
       return true ;
    }
 
-  // Nessuna soluzione : nessuna intersezione 
+   // Una soluzione : la retta interseca la superficie laterale e un piano
+   else if ( nRoot == 1) {
+      // Se piano superiore
+      if ( nBasInt == 2) {
+         // Punto di intersezione
+         dU1 = vdRoots[0] ;
+         ptInt1 = ptP + vdRoots[0] * vtV ;
+         // Normale alla superficie del cilindro verso l'interno
+         vtN1.Set( ptInt1.x, ptInt1.y, 0) ;
+         vtN1.Normalize() ;
+      }
+      // altrimenti piano inferiore
+      else if ( nBasInt == 1) {
+         // Punto di intersezione
+         dU2 = vdRoots[0] ;
+         ptInt2 = ptP + vdRoots[0] * vtV ;
+         // Normale alla superficie del cilindro verso l'interno
+         vtN2.Set( ptInt2.x, ptInt2.y, 0) ;
+         vtN2.Normalize() ;
+      }
+      // altrimenti niente
+      else
+         return false ;
+      if ( dU1 > dU2) {
+         swap( dU1, dU2) ;
+         swap( ptInt1, ptInt2) ;
+         swap( vtN1, vtN2) ;
+      }
+      if ( bInvertNormals) {
+         vtN1 *= - 1 ;
+         vtN2 *= - 1 ;
+      }
+      // Trovate intersezioni
+      return true ;
+   }
+
+   // Nessuna soluzione : nessuna intersezione 
    else
       return false ;
 }
 
+//----------------------------------------------------------------------------
+// Riferimento con origine nel centro della base e asse di simmetria coincidente con l'asse Z.
+// La funzione restituisce true in caso di intersezione, false altrimenti.
+//----------------------------------------------------------------------------
+bool
+IntersLineCyl( const Point3d& ptLineSt, const Vector3d& vtLineDir,
+               const Frame3d& CylFrame, double dH, double dRad, bool bTapLow, bool bTapUp,
+               double& dU1, Point3d& ptInt1, Vector3d& vtN1, double& dU2, Point3d& ptInt2, Vector3d& vtN2, bool bIgnoreTap, bool bInvertNormals)
+{
+   // Porto la linea nel riferimento del cilindro
+   Point3d ptP = GetToLoc( ptLineSt, CylFrame) ;
+   Vector3d vtV = GetToLoc( vtLineDir, CylFrame) ;
+   if ( IntersLineCyl( ptP, vtV, dH, dRad, bTapLow, bTapUp,
+                       dU1, ptInt1, vtN1, dU2, ptInt2, vtN2, bIgnoreTap, bInvertNormals))
+   {
+      ptInt1.ToGlob( CylFrame) ;
+      vtN1.ToGlob( CylFrame) ;
+      ptInt2.ToGlob( CylFrame) ;
+      vtN2.ToGlob( CylFrame) ;
+      return true ;
+   }
+   return false ;
+}
+
 //----------------------------------------------------------------------------
 // Linea e cilindro sono nel medesimo riferimento.
 // Il cilindro è definito con centro della base, asse, raggio e altezza.
@@ -133,7 +211,13 @@ IntersLineCyl( const Point3d& ptL, const Vector3d& vtL,
    if ( ! frCyl.Set( ptCyl, vtCyl))
       return false ;
   // Ora eseguo i conti nel riferimento intrinseco
-   return IntersLineCyl( GetToLoc( ptL, frCyl), GetToLoc( vtL, frCyl), dRad, dHeight, dU1, dU2) ;
+   bool bTapLow = false ;
+   bool bTapUp = false ;
+   bool bIgnoreTap = true ;
+   Point3d ptInt1, ptInt2 ;
+   Vector3d vtN1, vtN2 ;
+   return IntersLineCyl( ptL, vtL, frCyl, dHeight, dRad, bTapLow, bTapUp,
+                         dU1, ptInt1, vtN1, dU2, ptInt2, vtN2, bIgnoreTap) ;
 }
 
 //----------------------------------------------------------------------------
@@ -144,7 +228,7 @@ IntersLineCyl( const Point3d& ptL, const Vector3d& vtL,
 bool
 IntersLineCyl( const Point3d& ptL, const Vector3d& vtL,
                const Point3d& ptCyl1, const Point3d& ptCyl2, double dRad,
-               double& dU1, double& dU2) 
+               double& dU1, double& dU2)
 {
   // Determino asse ed altezza del cilindro
    Vector3d vtCyl = ptCyl2 - ptCyl1 ;
@@ -157,5 +241,39 @@ IntersLineCyl( const Point3d& ptL, const Vector3d& vtL,
    if ( ! frCyl.Set( ptCyl1, vtCyl))
       return false ;
   // Ora eseguo i conti nel riferimento intrinseco
-   return IntersLineCyl( GetToLoc( ptL, frCyl), GetToLoc( vtL, frCyl), dRad, dHeight, dU1, dU2) ;
+   bool bTapLow = false ;
+   bool bTapUp = false ;
+   bool bIgnoreTap = true ;
+   Point3d ptInt1, ptInt2 ;
+   Vector3d vtN1, vtN2 ;
+   return IntersLineCyl( ptL, vtL, frCyl, dHeight, dRad, bTapLow, bTapUp,
+                         dU1, ptInt1, vtN1, dU2, ptInt2, vtN2, bIgnoreTap) ;
+}
+
+//----------------------------------------------------------------------------
+// linea già nel riferimento intrinseco del cilindro
+//----------------------------------------------------------------------------
+bool IntersLineCyl( const Point3d& ptL, const Vector3d& vtL,
+                    double dRad, double dHeight,
+                    double& dU1, double& dU2)
+{
+   Point3d ptInt1, ptInt2 ;
+   Vector3d vtN1, vtN2 ;
+   bool bTapLow = false, bTapUp = false ;
+   bool bIgnoreTap = true ;
+   return IntersLineCyl( ptL, vtL, dHeight, dRad, bTapLow, bTapUp,
+                         dU1, ptInt1, vtN1, dU2, ptInt2, vtN2, bIgnoreTap) ;
+}
+
+
+//----------------------------------------------------------------------------
+// funzione esposta per altre dll
+//----------------------------------------------------------------------------
+bool
+IntersLineCyl( const Point3d& ptLineSt, const Vector3d& vtLineDir,
+               const Frame3d& CylFrame, double dH, double dRad,
+               double& dU1, Point3d& ptInt1, Vector3d& vtN1, double& dU2, Point3d& ptInt2, Vector3d& vtN2)
+{
+   return IntersLineCyl( ptLineSt, vtLineDir, CylFrame, dH, dRad, false, false,
+                         dU1, ptInt1, vtN1, dU2, ptInt2, vtN2, true, false) ;
 }

IntersLineCyl.h

@@ -20,17 +20,27 @@
 // Il cilindro è centrato sull'asse Z e appoggiato sul piano XY.
 // Con intersezione viene restituito true e i parametri in dU1 e dU2.
 //----------------------------------------------------------------------------
-bool IntersLineCyl( const Point3d& ptL, const Vector3d& vtL,
-                    double dRad, double dHeight,
-                    double& dU1, double& dU2) ;
+bool
+IntersLineCyl( const Point3d& ptP, const Vector3d& vtV, double dH, double dRad, bool bTapLow, bool bTapUp,
+               double& dU1, Point3d& ptInt1, Vector3d& vtN1, double& dU2, Point3d& ptInt2, Vector3d& vtN2, bool bIgnoreTap = false, bool bInvertNormals = false) ;
+
+// come sopra ma passo il riferimento intrinseco del cilindro in cui portare la linea
+bool
+IntersLineCyl( const Point3d& ptLineSt, const Vector3d& vtLineDir,
+               const Frame3d& CylFrame, double dH, double dRad, bool bTapLow, bool bTapUp,
+               double& dU1, Point3d& ptInt1, Vector3d& vtN1, double& dU2, Point3d& ptInt2, Vector3d& vtN2, bool bIgnoreTap = false, bool bInvertNormals = false) ;
 
 //----------------------------------------------------------------------------
 inline bool
 TestIntersLineCyl( const Point3d& ptL, const Vector3d& vtL,
                    double dRad, double dHeight)
 {
+   Point3d ptInt1, ptInt2 ;
+   Vector3d vtN1, vtN2 ;
    double dU1, dU2 ;
-   return IntersLineCyl( ptL, vtL, dRad, dHeight, dU1, dU2) ;
+   bool bTapLow = false, bTapUp = false ;
+   bool bIgnoreTap = true ;
+   return IntersLineCyl( ptL, vtL, dHeight, dRad, bTapLow, bTapUp, dU1, ptInt1, vtN1, dU2, ptInt2, vtN2, bIgnoreTap) ;
 }
 
 //----------------------------------------------------------------------------
@@ -50,3 +60,12 @@ bool IntersLineCyl( const Point3d& ptL, const Vector3d& vtL,
 bool IntersLineCyl( const Point3d& ptL, const Vector3d& vtL,
                     const Point3d& ptCyl1, const Point3d& ptCyl2, double dRad,
                     double& dU1, double& dU2) ;
+
+//----------------------------------------------------------------------------
+// // Linea e cilindro sono nel medesimo riferimento.
+// Il cilindro è definito con raggio e altezza. ( la linea è già nel riferimento intrinseco del cilindro)
+// In caso di intersezione viene restituito true e i parametri in dU1 e dU2.
+//----------------------------------------------------------------------------
+bool IntersLineCyl( const Point3d& ptL, const Vector3d& vtL,
+                    double dRad, double dHeight,
+                    double& dU1, double& dU2) ;

OffsetCurve3d.cpp

@@ -0,0 +1,794 @@
+//----------------------------------------------------------------------------
+//  EgalTech 2026
+//----------------------------------------------------------------------------
+// File : OffsetCurve3d.cpp       Data : 10.06.26         Versione : 3.1f1
+// Contenuto : Classe per offset di Curve 3d.
+//
+//
+//
+// Modifiche : 10.06.26 DB Creazione modulo.
+//
+//----------------------------------------------------------------------------
+
+//--------------------------- Include ----------------------------------------
+#include "stdafx.h"
+#include "GeoConst.h"
+#include "CurveLine.h"
+#include "CurveComposite.h"
+#include "RemoveCurveDefects.h"
+#include "IntersLineCyl.h"
+#include "/EgtDev/Include/EGkPoint3d.h"
+#include "/EgtDev/Include/EGkPolyLine.h"
+#include "/EgtDev/Include/EGkOffsetCurve3d.h"
+#include "/EgtDev/Include/EGkIntersLinePlane.h"
+#include "/EgtDev/Include/EgtPointerOwner.h"
+#include <algorithm>
+
+using namespace std ;
+
+#define SAVECRVORIG 0
+#define SAVEOFFDIR 0
+#define SAVECYL 0
+#define SAVEOFFSET 0
+#if SAVECRVORIG || SAVEOFFDIR || SAVECYL  || SAVEOFFSET
+   #include "/EgtDev/Include/EGkColor.h"
+   #include "/EgtDev/Include/EGkGeoVector3d.h"
+   vector<IGeoObj*> vGeo ;
+   vector<Color> vCol ;
+   #include "CurveArc.h"
+   #include "/EgtDev/Include/EGkGeoObjSave.h"
+   #include "/EgtDev/Include/EGkStmFromCurves.h"
+#endif
+
+//----------------------------------------------------------------------------
+OffsetCurve3d::~OffsetCurve3d( void)
+{
+   Reset() ;
+}
+
+//----------------------------------------------------------------------------
+bool
+OffsetCurve3d::Reset( void)
+{
+   for ( auto& pCrv : m_CrvLst) {
+      if ( pCrv != nullptr) {
+         delete pCrv ;
+         pCrv = nullptr ;
+      }
+   }
+   m_CrvLst.clear() ;
+   return true ;
+}
+
+//----------------------------------------------------------------------------
+bool
+OffsetCurve3d::Make( const PNT5AXVECTOR& vPnt5Ax, double dOffDist, int nType)
+{
+   // la funzione è pensata per lavorare con il risultato dell'operazione ProjectCurveOnSurf
+
+   // vOffDir devono essere normalizzati
+   // mi aspetto che siano più o meno perpendicolari alla curva
+
+   // pulisco tutto
+   Reset() ;
+
+   INTVECTOR vFlag ;
+   VCT3DVECTOR vOffDir ;
+   PolyLine PL ;
+   for ( int i = 0 ; i < ssize( vPnt5Ax) ; ++i) {
+      PL.AddUPoint( i, vPnt5Ax[i].ptP) ;
+      vOffDir.push_back( vPnt5Ax[i].vtDir1) ;
+      if ( vPnt5Ax[i].nFlag > 0)
+         vFlag.push_back( vPnt5Ax[i].nFlag) ;
+      else
+         return false ;
+   }
+
+   PtrOwner<CurveComposite> pCrv( CreateBasicCurveComposite()) ;
+   if ( ! pCrv->FromPolyLine( PL))
+      return false ;
+    
+#if SAVECRVORIG  || SAVEOFFDIR
+   vGeo.clear() ;
+   vCol.clear() ;
+
+   vGeo.push_back( pCrv->Clone()) ;
+   vCol.push_back( AQUA) ;
+   #if SAVEOFFDIR
+         Point3d ptBase ; PL.GetFirstPoint( ptBase) ;
+         for ( int i = 0 ; i < ssize( vOffDir) ; ++i) {
+            IGeoVector3d* pVec = CreateGeoVector3d() ;
+            pVec->Set( vOffDir[i] * dOffDist, ptBase) ;
+            PL.GetNextPoint( ptBase) ;
+            vGeo.push_back( pVec) ;
+            vCol.push_back( BLUE) ;
+         }
+   #endif
+   #if ! SAVECYL  &&  ! SAVEOFFSET
+         SaveGeoObj( vGeo, vCol, "C:\\Temp\\curve offset 3d\\crvoffset.nge") ;
+   #endif
+#endif
+
+   // verifico se la curva è un segmento di retta
+   bool bIsLine = PL.GetPointNbr() == 2 ;
+   if ( bIsLine) {
+      // faccio l'offset di una linea
+      return true ;
+   }
+
+   // se offset nullo, copio la curva ed esco
+   if ( abs( dOffDist) < 10 * EPS_SMALL) {
+      PtrOwner<CurveComposite> pCopy( CreateBasicCurveComposite()) ;
+      if ( IsNull( pCopy)  ||  ! pCopy->CopyFrom( pCrv))
+         return false ;
+      // unisco parti allineate (tranne gli estremi)
+      pCopy->MergeCurves( 10 * EPS_SMALL, ANG_TOL_STD_DEG, false) ;
+      // sposto in lista
+      m_CrvLst.push_back( Release( pCopy)) ;
+      return true ;
+   }
+
+   bool bClosed = pCrv->IsClosed() ;
+
+   // identifico le zone circostanti un angolo interno
+   for ( int i = 0 ; i < ssize( vPnt5Ax) ; ++i) {
+      if ( vFlag[i] == OffsetCurve3d::AngType::ANG_CONC) {
+         // scorro indietro e avanti flaggando i tratti da controllare
+         int nPrev = i - 1 ;
+         if ( nPrev < 0)
+            nPrev = ssize( vPnt5Ax) - 1;
+         int nNext = i + 1 ;
+         if ( nNext >= ssize( vPnt5Ax))
+            nNext = 0 ;
+         double dAng = acos( vPnt5Ax[nPrev].vtDir1 * vPnt5Ax[nNext].vtDir1) * RADTODEG ;
+         double dDistAngConc = dOffDist * tan( ( dAng / 2) * DEGTORAD) ;
+         int c = nPrev ;
+         while ( Dist( vPnt5Ax[i].ptP, vPnt5Ax[c].ptP) < dDistAngConc) {
+            vFlag[c] = OffsetCurve3d::AngType::ANG_BEFORE_CONC ;
+            --c ;
+            if ( c < 0) {
+               if ( bClosed)
+                  c = ssize( vPnt5Ax) - 1 ;
+               else
+                  break ;
+            }
+         }
+         vFlag[c] = OffsetCurve3d::AngType::ANG_BEFORE_CONC ;
+         // scorro in avanti
+         c = nNext ;
+         while ( c < ssize( vPnt5Ax) - 1  &&  Dist( vPnt5Ax[i].ptP, vPnt5Ax[c].ptP) < dDistAngConc) {
+            vFlag[c] = OffsetCurve3d::AngType::ANG_AFTER_CONC ;
+            ++c ;
+            if ( c == ssize( vPnt5Ax) - 1) {
+               if ( bClosed)
+                  c = 0 ;
+               else
+                  break ;
+            }  
+         }
+         vFlag[c] = OffsetCurve3d::AngType::ANG_AFTER_CONC ;
+         i = c ;
+      }
+   }
+
+   for ( int i = 1 ; i < ssize( vFlag) - 1 ; ++i) {
+      if ( vFlag[i-1] == OffsetCurve3d::AngType::ANG_SMOOTH_CONC  &&
+         vFlag[i+1] == OffsetCurve3d::AngType::ANG_SMOOTH_CONC &&
+         vFlag[i] != OffsetCurve3d::AngType::ANG_SMOOTH_CONC)
+         vFlag[i] = OffsetCurve3d::AngType::ANG_SMOOTH_CONC ;
+   }
+
+   double dRadCorr ;
+   Point3d ptPrev ; pCrv->GetStartPoint( ptPrev) ;
+   ptPrev += vOffDir[0] * dOffDist ;
+   Vector3d vtCorrPrev ;
+   Vector3d vtTangPrev ;
+   Vector3d vtDirPrev ; pCrv->GetStartDir( vtDirPrev) ;
+   if ( bClosed) {
+      Vector3d vtDirLast ; pCrv->GetEndDir( vtDirLast) ;
+      if ( vFlag[0] != OffsetCurve3d::AngType::ANG_CVEX)
+         vtTangPrev = Media( vtDirLast, vtDirPrev) ;
+      else if ( vFlag[0] == OffsetCurve3d::AngType::ANG_CVEX  &&  vFlag.back() != OffsetCurve3d::AngType::ANG_CVEX)
+         vtTangPrev = vtDirLast ;
+      else
+         vtTangPrev = vtDirPrev ;
+   }
+   const ICurve* pCrvPrev = pCrv->GetFirstCurve() ;
+   const ICurve* pCrvCurr ;
+   OFFSETSEGVEC vOffsetCrvs ;
+   Vector3d vtDirPrevOff  = V_INVALID ;
+   int nRejected = 0 ;
+   int nClosure = bClosed ? 1 : 0 ;
+   bool bCheckingClosure = false ;
+   bool bPlanarConcCvex = false ;
+   for ( int i = 1 ; i <= pCrv->GetCurveCount() + nClosure ; ++i) {
+      int nCurr = i ;
+      int nPrev = i - 1 ;
+      if ( i > pCrv->GetCurveCount()) {
+         nCurr = 0 ;
+         bCheckingClosure = true ;
+      }
+      if ( ! bCheckingClosure)
+         pCrvCurr = pCrv->GetNextCurve() ;
+      if ( pCrvCurr == nullptr  &&  bClosed)
+         pCrvCurr = pCrv->GetFirstCurve() ;
+      Vector3d vtOffDir = vOffDir[nCurr] ;
+      Vector3d vtDirCurr ; 
+      if ( pCrvCurr != nullptr)
+         pCrvCurr->GetStartDir( vtDirCurr) ;
+      else
+         vtDirCurr = vtDirPrev ;
+      pCrvPrev->GetStartDir( vtDirPrev) ;
+      Vector3d vtTang ;
+      // so che ci sono due punti in stretta prossimità dell'angolo, quindi discrimino tra la tangeten prima e dopo l'angolo
+      // negli altri casi faccio la media
+      if ( vFlag[nCurr] != OffsetCurve3d::AngType::ANG_CVEX)
+         vtTang = Media( vtDirCurr, vtDirPrev) ;
+      else if ( vFlag[nCurr] == OffsetCurve3d::AngType::ANG_CVEX  &&  vFlag[nPrev] != OffsetCurve3d::AngType::ANG_CVEX)
+         vtTang = vtDirPrev ;
+      else
+         vtTang = vtDirCurr ;
+      vtTang.Normalize() ;
+      Vector3d vtCorr = vtOffDir ;
+      double dCorrK = 1 ;
+      //if ( vFlag[nCurr] == OffsetCurve3d::AngType::ANG_CONC) {
+      //   double dHalfAlfa = acos( vtTang * vtTangPrev) * RADTODEG ;
+      //   dCorrK = 1 / sin( ( 90 - dHalfAlfa) * DEGTORAD) ;
+      //}
+
+      Point3d ptP ;
+      if ( pCrvCurr != nullptr)
+         pCrvCurr->GetStartPoint( ptP) ;
+      else
+         pCrvPrev->GetEndPoint( ptP) ;
+      dRadCorr = dOffDist ;
+      ptP = ptP + dRadCorr * dCorrK * vtCorr ;
+      // se secondo punto di angolo esterno di fianco, inserisco movimenti intermedi
+      if ( vFlag[nCurr] == OffsetCurve3d::AngType::ANG_CVEX  &&  vFlag[nPrev] == OffsetCurve3d::AngType::ANG_CVEX  &&  bPlanarConcCvex) {
+         double dAlfa = acos( vtTang * vtTangPrev) ;
+         double dDelta = dOffDist * tan( dAlfa / 4) ;
+         Point3d ptAdd1 = ptPrev + dDelta * vtTangPrev ;
+         ICurveLine* pCL1 = CreateBasicCurveLine() ;
+         pCL1->Set( ptPrev, ptAdd1) ;
+         vOffsetCrvs.emplace_back( pCL1, OffsetCurve3d::AngType::ANG_CVEX, -1) ;
+         Point3d ptAdd2 = ptP - dDelta * vtTang ;
+         ICurveLine* pCL2 = CreateBasicCurveLine() ;
+         pCL2->Set( ptAdd1, ptAdd2) ;
+         vOffsetCrvs.emplace_back( pCL2, OffsetCurve3d::AngType::ANG_CVEX, -1) ;
+         ptPrev = ptAdd2 ;
+      }
+      Vector3d vtAng = vtDirPrev ^ vtDirCurr ;
+      const double COS_ANG_MAX_PLANAR = 0.7 ;
+      bPlanarConcCvex = false ;
+      if ( ! vtAng.IsSmall()  &&  vtAng.Normalize())
+         bPlanarConcCvex = abs( vtAng *  vOffDir[nCurr]) < COS_ANG_MAX_PLANAR ;
+
+      if ( ! bCheckingClosure) {
+         Vector3d vtDirCurrOff = ptP - ptPrev ; vtDirCurrOff.Normalize() ;
+         double dProj = 1 ;
+         if ( vtDirPrevOff.IsValid())
+            dProj = vtDirCurrOff * vtDirPrevOff ;
+         // prima di inserirlo controllo che il tratto non torni indietro
+         if ( ( vFlag[nCurr] != ANG_STR  ||  dProj > - 0.966)  && Dist( ptPrev, ptP) > 2 * EPS_SMALL) {
+            // aggiungo tratto
+            ICurveLine* pCL = CreateBasicCurveLine() ;
+            pCL->Set( ptPrev, ptP) ;
+            vOffsetCrvs.emplace_back( pCL, vFlag[nCurr], i - 1) ;
+            // aggiorno punto precedente
+            ptPrev = ptP ;
+            vtCorrPrev = vtCorr ;
+            vtTangPrev = vtTang ;
+            vtDirPrev = vtDirCurr ;
+            if ( i < pCrv->GetCurveCount())
+               pCrvPrev = pCrvCurr ;
+            vtDirPrevOff = vtDirCurrOff ;
+         }
+         else
+            ++nRejected ;
+      }
+   }
+
+   // se chiusa aggiungo il tratto di chiusura
+   if ( bClosed) {
+      Point3d ptPS ; vOffsetCrvs.front().pCrv->GetStartPoint( ptPS) ;
+      ICurveLine* pCL = CreateBasicCurveLine() ;
+      Point3d ptPE ; vOffsetCrvs.back().pCrv->GetEndPoint( ptPE) ;
+      pCL->Set( ptPE, ptPS) ;
+      // aggiungo solo se valida, quindi se non sono già coincidenti
+      if ( pCL->IsValid())
+         vOffsetCrvs.emplace_back( pCL, OffsetCurve3d::AngType::ANG_STR, -1) ;
+   }
+
+   // qui faccio la correzione per gli angoli interni
+   EDITCRVINFOVEC vEditInfo ;
+   if ( ! CalcAdjustConcavePartsInPath( pCrv, vOffsetCrvs, dOffDist, vEditInfo))
+      return false ;
+
+   if ( nType == OFFTYPE::PLANECUT) {
+      if ( ! CalcAdjustConcavePartsPlaneCut( pCrv, vPnt5Ax, vOffsetCrvs, dOffDist, vEditInfo))
+         return false ;
+   }
+
+   // applico le modifiche calcolate
+   for ( int i = ssize( vEditInfo) - 1 ; i >= 0 ; --i) {
+      if ( vEditInfo[i].nFlag == EditCrvInfo::NOEDIT)
+         continue ;
+      else if ( vEditInfo[i].nFlag == EditCrvInfo::DEL)
+         vOffsetCrvs.erase( vOffsetCrvs.begin() + i) ;
+      else if ( vEditInfo[i].nFlag == EditCrvInfo::EDIT) {
+         if ( vEditInfo[i].ptStart.IsValid())
+            vOffsetCrvs[vEditInfo[i].nId].pCrv->ModifyStart( vEditInfo[i].ptStart) ;
+         if ( vEditInfo[i].ptEnd.IsValid())
+            vOffsetCrvs[vEditInfo[i].nId].pCrv->ModifyEnd( vEditInfo[i].ptEnd) ;
+         vOffsetCrvs[vEditInfo[i].nId].nParent = -2 ;
+      }
+   }
+
+   // scorro tutto il vettore delle linee di offset e unisco aggiungendo una linea dove ne ho cancellate
+   for ( int i = 0 ; i < ssize( vOffsetCrvs) - 1 ; ++i) {
+      Point3d ptEndCurr, ptStartNext ;
+      vOffsetCrvs[i].pCrv->GetEndPoint( ptEndCurr) ;
+      vOffsetCrvs[i+1].pCrv->GetStartPoint( ptStartNext) ;
+      if ( ! AreSamePointApprox( ptEndCurr, ptStartNext)) {
+         ICurveLine* pCL = CreateBasicCurveLine() ;
+         pCL->Set( ptEndCurr, ptStartNext) ;
+         vOffsetCrvs.emplace_back( pCL, OffsetCurve3d::AngType::ANG_STR,-1) ;
+         rotate( vOffsetCrvs.begin() + i + 1, vOffsetCrvs.end() - 1, vOffsetCrvs.end()) ;
+         ++i ;
+      }
+   }
+
+#if SAVEOFFSET  || SAVECYL
+   #if SAVEOFFSET
+      for ( int i = 0 ; i < ssize( vOffsetCrvs) ; ++i) {
+         vGeo.push_back( vOffsetCrvs[i].pCrv->Clone()) ;
+         if ( vOffsetCrvs[i].nParent == -2)
+            vCol.push_back( LIME) ;
+         else if ( vOffsetCrvs[i].nFlag == OffsetCurve3d::AngType::ANG_SMOOTH_CONC)
+            vCol.push_back( GREEN) ;
+         else if ( vOffsetCrvs[i].nFlag == OffsetCurve3d::AngType::ANG_STR)
+            vCol.push_back( PURPLE) ;
+         else if ( vOffsetCrvs[i].nFlag == OffsetCurve3d::AngType::ANG_CVEX)
+            vCol.push_back( RED) ;
+         else if ( vOffsetCrvs[i].nFlag == OffsetCurve3d::AngType::ANG_BEFORE_CONC)
+            vCol.push_back( OLIVE) ;
+         else if ( vOffsetCrvs[i].nFlag == OffsetCurve3d::AngType::ANG_AFTER_CONC)
+            vCol.push_back( YELLOW) ;
+         else if ( vOffsetCrvs[i].nFlag == OffsetCurve3d::AngType::ANG_CONC)
+            vCol.push_back( Color(0,64,0)) ; //dark green
+      }
+   #endif
+   SaveGeoObj( vGeo, vCol, "C:\\Temp\\curve offset 3d\\crvoffset.nge") ;
+#endif
+
+   // qua andrebbe gestito con una chain ( ptorebbero essere più di una curva)
+   PtrOwner<ICurveComposite> pCrvOffset( CreateBasicCurveComposite()) ;
+   for ( int i = 0 ; i < ssize( vOffsetCrvs) ; ++i) {
+      if ( ! pCrvOffset->AddCurve( Release( vOffsetCrvs[i].pCrv)))
+         return false ;
+   }
+   m_CrvLst.push_back( Release( pCrvOffset)) ;
+
+   return true ;
+
+   // raccordi
+
+   //// ordino le curve in ordine decrescente di lunghezza
+   //if ( m_CrvLst.size() > 1) {
+   //   for ( auto pCrv : m_CrvLst) {
+   //      double dLen ;
+   //      if ( pCrv->GetLength( dLen))
+   //         pCrv->SetTempProp( int( 1000 * dLen)) ;
+   //      else
+   //         pCrv->SetTempProp( 0) ;
+   //   }
+   //   m_CrvLst.sort( []( const ICurve* pA, const ICurve* pB) { return ( pA->GetTempProp() > pB->GetTempProp()) ; }) ;
+   //}
+
+   //// se originale era chiusa, verifico le risultanti e se necessario cerco di chiuderle
+   //if ( bClosed) {
+   //   for ( auto pCrv : m_CrvLst) {
+   //      CurveComposite* pCrvCo = GetBasicCurveComposite( pCrv) ;
+   //      if ( pCrvCo != nullptr)
+   //         pCrvCo->Close() ;
+   //   }
+   //}
+
+   //return true ;
+}
+
+//----------------------------------------------------------------------------
+ICurve*
+OffsetCurve3d::GetCurve( void)
+{
+   return GetLongerCurve() ;
+}
+
+//----------------------------------------------------------------------------
+ICurve*
+OffsetCurve3d::GetLongerCurve( void)
+{
+   if ( m_CrvLst.empty())
+      return nullptr ;
+   // le curve sono ordinate in senso decrescente di lunghezza
+   ICurve* pCrv = m_CrvLst.front() ;
+   m_CrvLst.pop_front() ;
+   return pCrv ;
+}
+
+//----------------------------------------------------------------------------
+ICurve*
+OffsetCurve3d::GetShorterCurve( void)
+{
+   if ( m_CrvLst.empty())
+      return nullptr ;
+   // le curve sono ordinate in senso decrescente di lunghezza
+   ICurve* pCrv = m_CrvLst.back() ;
+   m_CrvLst.pop_back() ;
+   return pCrv ;
+}
+
+//----------------------------------------------------------------------------
+bool
+IsPointInsideCylinder( const Point3d& ptTest, const Cyl& offCyl, double dLinTol)
+{
+   Point3d ptTestLoc = ptTest ; ptTestLoc.ToLoc( offCyl.frCyl) ;
+   if ( ptTestLoc.z > offCyl.dH  ||  ptTestLoc.z < 0)
+      return false ;
+   double dDist = ptTestLoc.x * ptTestLoc.x + ptTestLoc.y * ptTestLoc.y ;
+   double dRadSq = ( offCyl.dRad - dLinTol) * ( offCyl.dRad - dLinTol) ;
+   if ( dDist > dRadSq)
+      return false ;
+   return true ;
+}
+
+//----------------------------------------------------------------------------
+bool
+CalcAdjustConcavePartsInPath( const ICurveComposite* pCrv, const OFFSETSEGVEC& vOffsetCrvs, double dRad, EDITCRVINFOVEC& vEditInfo)
+{
+   const double dLinTol = 0 * EPS_SMALL ;
+   for ( int i = 0 ; i < ssize( vOffsetCrvs) ; ++i) {
+      int nFlag = vOffsetCrvs[i].nFlag ;
+      // considero tutt le zone concave
+      if ( nFlag >= OffsetCurve3d::AngType::ANG_CONC) {
+         // scorro i prossimi finchè trovo la fine della zona concava
+         // controllo se devo considerare anche tratti prima dello start
+         INTVECTOR vLines ;
+         if ( i == 0) {
+            INTVECTOR vLinesAdd ;
+            int c = ssize( vOffsetCrvs) - 1 ;
+            nFlag = vOffsetCrvs[c].nFlag ;
+            while ( nFlag >= OffsetCurve3d::AngType::ANG_CONC) {
+               vLinesAdd.push_back( c) ;
+               --c ;
+               if ( c > 0)
+                  nFlag = vOffsetCrvs[c].nFlag ;
+            }
+            // inserisco il vettore al contrario, in modo che sia in ordine crescente
+            vLines.insert( vLines.end(), vLinesAdd.rbegin(), vLinesAdd.rend()) ;
+         }
+         bool bDone = false ;
+         nFlag = vOffsetCrvs[i].nFlag ;
+         while ( nFlag >= OffsetCurve3d::AngType::ANG_CONC) {
+            vLines.push_back( i) ;
+            ++i ;
+            if ( i < ssize( vOffsetCrvs))
+               nFlag = vOffsetCrvs[i].nFlag ;
+            else {
+               bDone = true ;
+               break ;
+            }
+         }
+         // se sto ricominciando, esco dal for ( il tratto finale è già stato considerato insieme al tratto iniziale)
+         if ( bDone)
+            break ;
+         CYLVECT vCyl ;
+         // creo un cilindro della dimensione del raggio
+         for ( int j = 0 ; j < ssize( vLines) ; ++j) {
+            if ( vOffsetCrvs[vLines[j]].nParent == -1)
+               continue ;
+            const ICurve* pSubCrv = pCrv->GetCurve( vOffsetCrvs[vLines[j]].nParent) ;
+            Point3d ptStart, ptEnd ;
+            pSubCrv->GetStartPoint( ptStart) ;
+            pSubCrv->GetEndPoint( ptEnd) ;
+            // cilindri con asse sul parent
+            Vector3d vtHeight = ptEnd - ptStart ;
+            double dHeight = vtHeight.Len() ;
+            vtHeight.Normalize() ;
+            vCyl.emplace_back( ptStart, vtHeight, dHeight, dRad, dLinTol) ;
+#if SAVECYL
+            CurveArc ca ; ca.Set( ptStart, vtHeight, dRad) ;
+            ISurfTriMesh* pSurfTm = GetSurfTriMeshByExtrusion( &ca, vtHeight * dHeight, false, 2 * EPS_SMALL) ;
+            vGeo.push_back( pSurfTm) ;
+            vCol.push_back( LGRAY) ;
+#endif
+         }
+
+         // controllo l'end di ogni linea per verificare se sta nel cilindro definito da uno degli altri tratti
+         // controllo tutto i punti
+         bool bErasedSomePart = false ;
+         bool bCheckStart = false ;
+         vector<INTINTVECTOR> vEditZones ;
+         for ( int j = 0 ; j < ssize( vLines) ; ++j) {
+            Point3d ptStart, ptEnd ;
+            const ICurve* pSubCrv = vOffsetCrvs[vLines[j]].pCrv ;
+            if ( pSubCrv == nullptr)
+               return false ;
+            pSubCrv->GetEndPoint( ptEnd) ;
+            pSubCrv->GetStartPoint( ptStart) ;
+            // se stanno in uno dei cilindri degli altri tratti della zona concava
+            bool bToErase = false ;
+            for ( int k = 0 ; k < ssize( vCyl) ; ++k) {
+               if ( j == k)
+                  continue ;
+               bToErase = IsPointInsideCylinder( ptEnd, vCyl[k], dLinTol) ;
+               bool bStartInsideCyl = false ;
+               if ( bCheckStart  &&  ! bToErase) {
+                  bStartInsideCyl = IsPointInsideCylinder( ptStart, vCyl[k], dLinTol) ;
+                  bToErase = bToErase || bStartInsideCyl ;
+               }
+               if ( bToErase) {                 
+                  bErasedSomePart = true ;
+                  if ( ! bStartInsideCyl)
+                     bCheckStart = true ;
+
+                  if ( vEditZones.empty()  ||  vEditZones.back().back().first != vLines[j-1])
+                     vEditZones.emplace_back() ;
+                  vEditZones.back().emplace_back( vLines[j], j) ;
+                  if ( ! bStartInsideCyl  &&  j < ssize( vLines) - 1) {
+                     vEditZones.back().emplace_back( vLines[j+1], j + 1) ;
+                     ++j ;
+                  }
+                  break ;
+               }
+            }
+            if ( ! bToErase) {
+               bCheckStart = false ;
+               vEditInfo.emplace_back( vLines[j], EditCrvInfo::NOEDIT) ;
+            }
+         }
+         if ( bErasedSomePart) {
+            // calcolo le intersezioni effettive del primo e ultimo tratto cancellati con i cilindri che li hanno cancellati
+            for ( int z = 0 ; z < ssize( vEditZones) ; ++z) {
+               INTINTVECTOR& vInters = vEditZones[z] ;
+               if ( ssize( vInters) == 1)
+                  continue ;
+               for ( int j = 0 ; j < ssize( vInters) ; ++j) {
+                  // cancello i tratti intermedi
+                  if ( j > 0 && j < ssize( vInters) - 1) {
+                     vEditInfo.emplace_back( vInters[j].first, EditCrvInfo::DEL) ;
+                     continue ;
+                  }
+                  // per il primo e ultimo controllo le intersezioni con tutti i cilindri
+                  PtrOwner<ICurve> pCL ( vOffsetCrvs[vInters[j].first].pCrv->Clone()) ;
+                  Point3d ptStart ; pCL->GetStartPoint( ptStart) ;
+                  Vector3d vtStart ; pCL->GetStartDir( vtStart) ;
+                  double dLen ; pCL->GetLength( dLen) ;
+                  double dUTrim = ( j == 0 ? INFINITO : 0) ;
+                  Point3d ptTrim = P_INVALID ;
+                  for ( int k = 0 ; k < ssize( vCyl) ; ++k) {
+                     if ( vInters[j].second == k)
+                        continue ;
+                     Point3d ptInt1 = P_INVALID, ptInt2 = P_INVALID ;
+                     double dU1, dU2 ;
+                     Vector3d vtN1, vtN2 ;
+                     if ( IntersLineCyl( ptStart, vtStart * dLen, vCyl[k].frCyl, vCyl[k].dH, vCyl[k].dRad, false, false, dU1, ptInt1, vtN1, dU2, ptInt2, vtN2, true)) {
+                        bool bUpdate = ( j == 0 ? dU1 < dUTrim : dU1 > dUTrim) ;
+                        bUpdate = bUpdate &&  ptInt1.IsValid() &&  dU1 > 0  &&  dU1 < 1 ;
+                        bUpdate = bUpdate &&  vtN1 * vtStart < 0 ;
+                        if ( bUpdate) {
+                           dUTrim = dU1 ;
+                           ptTrim = ptInt1 ;
+                        }
+                        bUpdate = ( j == 0 ? dU2 < dUTrim : dU2 > dUTrim) ;
+                        bUpdate = bUpdate &&  ptInt2.IsValid() &&  dU2 > 0  &&  dU2 < 1 ;
+                        bUpdate = bUpdate &&  vtN2 * vtStart > 0 ;
+                        if ( bUpdate) {
+                           dUTrim = dU2 ;
+                           ptTrim = ptInt2 ;
+                        }
+                     }
+                  }
+                  if ( j == 0) {
+                     if ( ptTrim.IsValid()) {
+                        bool bOk = pCL->ModifyEnd( ptTrim) ;
+                        double dNewLen ;
+                        if ( bOk)
+                           pCL->GetLength( dNewLen) ;
+                        if ( ( ! bOk  || dNewLen < 0.1)  &&  vInters[0].first != 0) {  // se fosse il primo allora potrei modificare il successivo
+                           int nPrev = vInters[0].first - 1 ;
+                           vInters[0].first = nPrev ;
+                           int c = 1 ;
+                           while( vEditInfo.end()[-c].nId != nPrev)
+                              ++c ;
+                           vEditInfo.end()[-c].nFlag = EditCrvInfo::EDIT ;
+                           vEditInfo.end()[-c].ptEnd = ptTrim ;
+                           vEditInfo.emplace_back( nPrev + 1, EditCrvInfo::DEL) ;
+                        }
+                        else
+                           vEditInfo.emplace_back( vInters[0].first, EditCrvInfo::EDIT, P_INVALID, ptTrim) ;
+                     }
+                     else
+                        vEditInfo.emplace_back( vInters[0].first, EditCrvInfo::EDIT, P_INVALID, P_INVALID) ;
+                  }
+                  else {
+                     if ( ptTrim.IsValid()) {
+                        bool bOk = pCL->ModifyStart( ptTrim) ;
+                        double dNewLen ;
+                        if ( bOk)
+                           pCL->GetLength( dNewLen) ;
+                        if ( ( ! bOk  ||  dNewLen < 0.1)  &&  vInters[j].first != ssize( vOffsetCrvs) - 1) {  // se fosse l'ultima curva allora potrei modificare la precedente
+                           int nNext = vInters[j].first + 1 ;
+                           vInters[j].first = nNext ;
+                           vEditInfo.emplace_back( nNext - 1, EditCrvInfo::DEL) ;
+                           int c = 1 ;
+                           while ( vEditInfo.end()[-c].nId != nNext  && c < ssize( vEditInfo))
+                              ++c ;
+                           if ( vEditInfo.end()[-c].nId == nNext) {
+                              vEditInfo.end()[-c].nFlag = EditCrvInfo::EDIT ;
+                              vEditInfo.end()[-c].ptStart = ptTrim ;
+                           }
+                           else
+                              vEditInfo.emplace_back( nNext, EditCrvInfo::EDIT, ptTrim, P_INVALID) ;
+                        }
+                        else
+                           vEditInfo.emplace_back( vInters[j].first, EditCrvInfo::EDIT, ptTrim, P_INVALID) ;
+                     }
+                     else
+                        vEditInfo.emplace_back( vInters[j].first, EditCrvInfo::EDIT, P_INVALID, P_INVALID) ;
+                  }
+               }
+            }
+         }
+         i = vLines.back() ;
+      }
+      else {
+         if ( vEditInfo.empty()  ||  vEditInfo.back().nId != i)
+            vEditInfo.emplace_back( i, EditCrvInfo::NOEDIT) ;
+      }   
+   }
+
+   sort( vEditInfo.begin(), vEditInfo.end(), []( EditCrvInfo& a, EditCrvInfo& b) { return a.nId < b.nId ;}) ;
+   return true ;
+}
+
+//----------------------------------------------------------------------------
+bool
+CalcAdjustConcavePartsPlaneCut( const ICurveComposite* pCrv, const PNT5AXVECTOR& vPnt5Ax, const OFFSETSEGVEC& vOffsetCrvs,
+                                double dRad, EDITCRVINFOVEC& vEditInfo)
+{
+   // calcolo come tagliare il percorso negli angoli misti concavo/convesso
+   // il taglio al percorso lo faccio usando il piano definito dalla direzione di offset
+   // se una delle due direzioni è perpendicolare al piano formato dai due tratti, la cui joint è il punto corrente, allora non faccio nulla
+   for ( int i = 0 ; i < ssize( vOffsetCrvs) ; ++i) {
+      if ( vOffsetCrvs[i].nFlag == OffsetCurve3d::AngType::ANG_CVEX) {
+         // se ho 2 tratti convex di fila, ho un convex non planar e se ho anche un angolo importante tra i due lati, devo correggere
+         // se ho 4 tratti convex di fila, ho un convex planar e non devo fare nulla
+         int c = 1 ;
+         while ( i + c < ssize( vOffsetCrvs)  &&  vOffsetCrvs[i + c].nFlag == OffsetCurve3d::AngType::ANG_CVEX)
+            ++c ;
+         if ( c == 4) {
+            i += 3 ;
+            continue ;
+         }
+
+         // trovo i due piani e taglio i tratti prima e dopo lo spigolo
+         int nParent = vOffsetCrvs[i].nParent ;  // sottocurva di pCrv che ha generato il tratto di offset
+         Point3d pt ; pCrv->GetCurve( nParent)->GetEndPoint( pt) ;
+         int nNextParent = nParent + 1 ;
+         bool bCheckingStart = false ;
+         if ( nNextParent > pCrv->GetCurveCount() - 1) {
+            if ( ! pCrv->IsClosed())
+               return false ;
+            nNextParent = 0 ;
+            bCheckingStart = true ;
+         }
+         Vector3d vtDirNext ; pCrv->GetCurve( nNextParent)-> GetStartDir( vtDirNext) ;
+         Vector3d vtDirPrev ; pCrv->GetCurve( nParent)-> GetEndDir( vtDirPrev) ;
+         // punti che rappresentano la pCrv ( quindi pCrv->GetCurveCount() == ssize( vPnt5Ax) - 1)
+         Vector3d vtNNext ;
+         Vector3d vtNPrev ;
+         if ( ! bCheckingStart) {
+            vtNNext = vPnt5Ax[nNextParent].vtDir2 ^ vtDirNext ;
+            vtNPrev = vPnt5Ax[nNextParent].vtDir1 ^ vtDirPrev ;
+         }
+         else {
+            vtNNext = vPnt5Ax[nNextParent].vtDir1 ^ vtDirNext ;
+            vtNPrev = vPnt5Ax[nNextParent].vtDir2 ^ vtDirPrev ;
+         }
+         Plane3d plNext ; plNext.Set( pt, vtNNext) ;
+         Plane3d plPrev ; plPrev.Set( pt, vtNPrev) ;
+         Point3d ptPrev ;
+         Point3d ptNext ;
+         // interseco con il piano precedente prendendo i tratti successivi
+         bool bFound = false ;
+         // parto a confrontare i segmenti successivi a quelli identificati come concavi
+         if ( ! bCheckingStart)
+            c = i + 2 ;
+         else  // se sono arrivato a fine curva di una curva chiusa controllo con lo start
+            c = 1 ;
+         while ( ! bFound  &&  c > 0) {
+            Point3d ptInt ;
+            Point3d ptStart, ptEnd ;
+            vOffsetCrvs[c].pCrv->GetStartPoint( ptStart) ;
+            vOffsetCrvs[c].pCrv->GetEndPoint( ptEnd) ;
+            IntersLinePlane( ptStart, ptEnd, plPrev, ptInt, false) ;
+            Vector3d vtDir ; vOffsetCrvs[c].pCrv->GetStartDir( vtDir) ;
+            double dLen ; vOffsetCrvs[c].pCrv->GetLength( dLen) ;
+            double dU = ( ptInt - ptStart).Len() / dLen ;
+            if ( vtDir * ( ptInt - ptStart) < 0)
+               dU *= -1 ;
+            if ( dU < 1) {
+               ptNext = ptInt ;
+               bFound = true ;
+            }
+            else
+               ++c ;
+         }
+         // salvo la modifica nel vettore edit
+         int nNext = c ;
+         vEditInfo[c].nFlag = EditCrvInfo::EditFlag::EDIT ;
+         vEditInfo[c].ptStart = ptNext ;
+
+         // interseco con il piano successivo prendendo i tratti precedenti
+         bFound = false ;
+         c = i - 1 ;
+         while ( ! bFound  &&  c < ssize( vOffsetCrvs)) {
+            Point3d ptInt ;
+            Point3d ptStart, ptEnd ;
+            vOffsetCrvs[c].pCrv->GetStartPoint( ptStart) ;
+            vOffsetCrvs[c].pCrv->GetEndPoint( ptEnd) ;
+            IntersLinePlane( ptStart, ptEnd, plNext, ptInt, false) ;
+            Vector3d vtDir ; vOffsetCrvs[c].pCrv->GetStartDir( vtDir) ;
+            double dLen ; vOffsetCrvs[c].pCrv->GetLength( dLen) ;
+            double dU = ( ptInt - ptStart).Len() / dLen ;
+            if ( vtDir * ( ptInt - ptStart) < 0)
+               dU *= -1 ;
+            if ( dU > 0) {
+               ptPrev = ptInt ;
+               bFound = true ;
+            }
+            else
+               --c ;
+         }
+         // salvo la modifica nel vettore edit
+         int nPrev = c ;
+         vEditInfo[c].nFlag = EditCrvInfo::EditFlag::EDIT ;
+         vEditInfo[c].ptEnd = ptPrev ;
+
+         // tengo solo il punto più esterno
+         double dLen1 = Dist( ptPrev, pt) ;
+         double dLen2 = Dist( ptNext, pt) ;
+         if ( dLen1 > dLen2)
+            vEditInfo[nNext].ptStart = ptPrev ;
+         else
+            vEditInfo[nPrev].ptStart = ptNext ;
+
+         // setto come da cancellare tutti i tratti nel mezzo
+         if ( ! bCheckingStart) {
+            c = nPrev + 1 ;
+            while ( c < nNext) {
+               vEditInfo[c].nFlag = EditCrvInfo::EditFlag::DEL ;
+               ++c ;
+            }
+         }
+         else {
+            c = nPrev + 1 ;
+            while ( c < ssize( vEditInfo)) {
+               vEditInfo[c].nFlag = EditCrvInfo::EditFlag::DEL ;
+               ++c ;
+            }
+            c = 0 ;
+            while ( c < nNext) {
+               vEditInfo[c].nFlag = EditCrvInfo::EditFlag::DEL ;
+               ++c ;
+            }
+         }
+
+         if ( ! bCheckingStart)
+            i = nNext ;
+      }
+   }
+
+   return true ;
+}

PolyLine.cpp

@@ -761,7 +761,7 @@ DouglasPeuckerSimplification( const PNTUVECTOR& vPtU, const double dSqTol, const
 
   // se la distanza massima trovata è sopra la tolleranza, allora controllo la parte di PolyLine tra
   // (nIndStart, nMaxInd) e quella tra (nMaxInd, nIndEnd)
-   if ( dMaxSqDist > dSqTol) {
+   if (  dMaxSqDist > dSqTol) {
      // inserisco il punto
       vInd.push_back( nMaxInd) ;
      // split
@@ -775,7 +775,7 @@ DouglasPeuckerSimplification( const PNTUVECTOR& vPtU, const double dSqTol, const
 
 //----------------------------------------------------------------------------
 bool
-PolyLine::RemoveAlignedPoints( double dToler, bool bStartEnd)
+PolyLine::RemoveAlignedPoints( double dToler, bool bStartEnd, double dMaxLen)
 {
   // se non ci sono almeno 3 punti, esco subito
    if ( m_lUPoints.size() < 3)
@@ -792,34 +792,65 @@ PolyLine::RemoveAlignedPoints( double dToler, bool bStartEnd)
   // vettore indici dei punti rimanenti
    INTVECTOR vInd ; vInd.reserve( vPtU.size()) ;
 
-  // se aperta
-   if ( ! IsClosed()) {
-     // considero tutti i punti della PolyLine
-      vInd.push_back( 0) ;
-      if ( ! DouglasPeuckerSimplification( vPtU, dSqTol, 0, int( vPtU.size()) - 1, vInd))
-         return false ;
-      vInd.push_back( int( vPtU.size()) - 1) ;
-   }
-  // altrimenti chiusa
-   else {
-     // cerco il punto più distante dal primo
-      double dMaxDist = 0. ;
-      int nMaxInd = 0 ;
-      for ( int i = 1 ; i < int( vPtU.size()) ; ++ i) {
-         double dCurrDist = Dist( vPtU[0].first, vPtU[i].first) ;
-         if ( dCurrDist > dMaxDist) {
-            dMaxDist = dCurrDist ;
-            nMaxInd = i ;
-         }
+   if ( dMaxLen > INFINITO - 1) {
+     // se aperta
+      if ( ! IsClosed()) {
+        // considero tutti i punti della PolyLine
+         vInd.push_back( 0) ;
+         if ( ! DouglasPeuckerSimplification( vPtU, dSqTol, 0, int( vPtU.size()) - 1, vInd))
+            return false ;
+         vInd.push_back( int( vPtU.size()) - 1) ;
+      }
+     // altrimenti chiusa
+      else {
+        // cerco il punto più distante dal primo
+         double dMaxDist = 0. ;
+         int nMaxInd = 0 ;
+         for ( int i = 1 ; i < int( vPtU.size()) ; ++ i) {
+            double dCurrDist = Dist( vPtU[0].first, vPtU[i].first) ;
+            if ( dCurrDist > dMaxDist) {
+               dMaxDist = dCurrDist ;
+               nMaxInd = i ;
+            }
+         }
+        // recupero due PolyLine di approssimazione
+         vInd.push_back( 0) ;
+         if ( ! DouglasPeuckerSimplification( vPtU, dSqTol, 0, nMaxInd, vInd))
+            return false ;
+         vInd.push_back( nMaxInd) ;
+         if ( ! DouglasPeuckerSimplification( vPtU, dSqTol, nMaxInd, int( vPtU.size()) - 1, vInd))
+            return false ;
+         vInd.push_back( int( vPtU.size()) - 1) ;
+      }
+   }
+   else {
+      // raggruppo i punti della polyline a gruppi che stanno entro la lunghezza massima e ad ognuno applico Douglas
+      vInd.push_back(0) ;
+
+      int i = 0 ;
+      while ( i < ssize(vPtU) - 1) {
+         int nLast = i + 1 ;
+         while ( nLast < ssize( vPtU) && Dist( vPtU[i].first, vPtU[nLast].first) <= dMaxLen)
+            ++nLast ;
+
+         // l'ultimo punto era oltre il limite
+         --nLast ;
+
+         // sicurezza: almeno un passo avanti
+         if ( nLast == i)
+            nLast = i + 1 ;
+
+         // mantieni l'estremo del tratto
+         if ( vInd.back() != nLast)
+            vInd.push_back( nLast) ;
+
+         // semplifica il tratto interno
+         if ( nLast - i > 1) {
+            if ( ! DouglasPeuckerSimplification( vPtU, dSqTol, i, nLast, vInd))
+               return false ;
+         }
+         i = nLast ;
       }
-     // recupero due PolyLine di approssimazione
-      vInd.push_back( 0) ;
-      if ( ! DouglasPeuckerSimplification( vPtU, dSqTol, 0, nMaxInd, vInd))
-         return false ;
-      vInd.push_back( nMaxInd) ;
-      if ( ! DouglasPeuckerSimplification( vPtU, dSqTol, nMaxInd, int( vPtU.size()) - 1, vInd))
-         return false ;
-      vInd.push_back( int( vPtU.size()) - 1) ;
    }
 
   // ordino in senso crescente
@@ -1618,6 +1649,9 @@ AssociatePolyLinesMinDistPoints( const PolyLine& PL1, const PolyLine& PL2, PNTIV
    int nPnt2 = PL2.GetPointNbr() ;
    if ( nPnt1 == 0 || nPnt2 == 0)
       return false ;
+
+   bool bClosed1 = PL1.IsClosed() ;
+   bool bClosed2 = PL2.IsClosed() ;
  
   // indica la presenza di punti interni in comune tra le due polylines
    bCommonInternalPoints = false ;
@@ -1663,6 +1697,10 @@ AssociatePolyLinesMinDistPoints( const PolyLine& PL1, const PolyLine& PL2, PNTIV
       if ( nMinJ < nLastJ)
          nMinJ = nLastJ ;
 
+     // se la curva è chiusa il primo e l'ultimo punto coincidono, verifico quale conviene considerare
+      if ( bClosed2  &&  nMinJ == nTotP2 - 1  &&  nLastJ == 0)
+         nMinJ = 0 ;
+
      // verifica se è un punto interno in comune con l'altra polyline  
       if ( i < nTotP1 - 1  &&  dDist < EPS_SMALL  &&  abs( dMinDistPar - floor( dMinDistPar + 0.5)) < EPS_SMALL)
          bCommonInternalPoints = true ;
@@ -1693,6 +1731,9 @@ AssociatePolyLinesMinDistPoints( const PolyLine& PL1, const PolyLine& PL2, PNTIV
 
       if ( nMinI < nLastI)
          nMinI = nLastI ;
+      
+      if ( bClosed1  &&  nMinI == nTotP1 - 1  &&  nLastI == 0)
+         nMinI = 0 ;
 
       if ( j < nTotP2 - 1  &&  dDist < EPS_SMALL &&  abs( dMinDistPar - floor( dMinDistPar + 0.5)) < EPS_SMALL)
          bCommonInternalPoints = true ;

ProjectCurveSurf.cpp

@@ -13,6 +13,7 @@
 
 //--------------------------- Include ----------------------------------------
 #include "stdafx.h"
+#include <cmath>
 #include "SurfTriMesh.h"
 #include "SurfBezier.h"
 #include "GeoConst.h"
@@ -32,14 +33,6 @@ using namespace std ;
 const double COS_ANG_LIM = 0.0175 ;
 // Angolo massimo tra normali per effettuare bisezione su spigolo
 const double COS_ANG_MAX_CORNER = 0.8660 ;
-// Tipologia di punto
-const int P5AX_TO_DELETE = -1 ;        // da cancellare
-const int P5AX_OUT = 0 ;               // aggiunto prima di inizio o dopo fine
-const int P5AX_STD = 1 ;               // standard
-const int P5AX_CVEX = 2 ;              // su angolo convesso
-const int P5AX_CONC = 3 ;              // in angolo concavo
-const int P5AX_BEFORE_CONC = 4 ;       // adiacente ad angolo concavo
-const int P5AX_AFTER_CONC = 5 ;        // adiacente ad angolo concavo
 
 //----------------------------------------------------------------------------
 static double
@@ -64,6 +57,7 @@ PointsInTolerance( const PNT5AXVECTOR& vPt5ax, int nPrec, int nCurr, int nNext,
 static bool
 AddPointsOnCorners( PNT5AXVECTOR& vPt5ax)
 {
+   const double dSinSmallAngle = sin( 0.5 * DEGTORAD) ;
    for ( int i = 1 ; i < ssize( vPt5ax) ; ++ i) {
      // precedente
       int j = i - 1 ;
@@ -79,18 +73,47 @@ AddPointsOnCorners( PNT5AXVECTOR& vPt5ax)
             Point3d ptInt ;
             if ( IntersLinePlane( ptEdge, vtEdge, 1, plPlane3, ptInt, false) == ILPT_YES) {
               // verifico se spigolo convesso o concavo
-               bool bConvex ;
-               if ( ! AreSamePointApprox( ptInt, vPt5ax[j].ptP))
-                  bConvex = ( ( vPt5ax[j].vtDir1 ^ ( ptInt - vPt5ax[j].ptP)) * vtEdge > 0) ;
-               else
-                  bConvex = (( vPt5ax[i].vtDir1 ^ ( ptInt - vPt5ax[i].ptP)) * vtEdge < 0) ;
+               double dProjPrev = ( vPt5ax[i].ptP - vPt5ax[j].ptP) * vPt5ax[j].vtDir1 ;
+               double dProjCurr = ( vPt5ax[j].ptP - vPt5ax[i].ptP) * vPt5ax[i].vtDir1 ;
+               bool bConvex = ( abs( dProjCurr) > abs( dProjPrev) ? dProjCurr < 0 : dProjPrev < 0) ;
+               int nPrev = i - 1 ;
+               if ( i < ssize( vPt5ax) - 2  &&  ! AreSameVectorExact(vPt5ax[i - 1].vtDir1, vPt5ax[i - 1].vtDir2)) {
+                  int z = nPrev - 1 ;
+                  // se vtDir1 e vtDir2 sono diverse allora sono su uno spigolo
+                  double dProjPrev2 = ( vPt5ax[z].ptP - vPt5ax[nPrev].ptP) * vPt5ax[nPrev].vtDir2 ;
+                  double dProjCurr2 = ( vPt5ax[i].ptP - vPt5ax[nPrev].ptP) * vPt5ax[nPrev].vtDir1 ;
+                  // se uno dei due è convesso allora considero convesso l'angolo
+                  bConvex = dProjPrev2 < EPS_SMALL  ||  dProjCurr2 < EPS_SMALL ;
+               }
+               bool bValidIntersAfterJ = true ;
+               bool bValidIntersBeforeI = true ;
+               if ( i > 2) {
+                  // verifico che l'intersezione sia tra i e j e non prima di j
+                  int k = i - 2 ;
+                  bValidIntersAfterJ = ( ptInt - vPt5ax[j].ptP) * ( vPt5ax[j].ptP - vPt5ax[k].ptP) > 0 ;
+                  bool bBetweenIAndJ = ( ptInt - vPt5ax[j].ptP) * ( vPt5ax[i].ptP - vPt5ax[j].ptP) > 0 ;
+                  bValidIntersAfterJ = bValidIntersAfterJ && bBetweenIAndJ ;
+               }
+               if ( i < ssize( vPt5ax) - 1) {
+                  // verifico anche che l'intersezione non sia dopo i
+                  int h = i + 1 ;
+                  bValidIntersBeforeI = ( ptInt - vPt5ax[i].ptP) * ( vPt5ax[h].ptP - vPt5ax[i].ptP) < 0 ;
+                  bool bBetweenIAndJ = ( ptInt - vPt5ax[i].ptP) * ( vPt5ax[i].ptP - vPt5ax[j].ptP) < 0 ;
+                  bValidIntersBeforeI = bValidIntersBeforeI && bBetweenIAndJ ;
+               }
+               bool bValidInters = ( bValidIntersAfterJ  &&  bValidIntersBeforeI) ;
               // se convesso, metto due punti con direzione appena prima e appena dopo
                if ( bConvex) {
                   Vector3d vtLine1 = ptInt - vPt5ax[j].ptP ; double dLen1 = vtLine1.Len() ;
                   Vector3d vtLine2 = vPt5ax[i].ptP - ptInt ; double dLen2 = vtLine2.Len() ;
-                  if ( dLen1 > 2 * EPS_SMALL) {
+                  if ( dLen1 > 10 * EPS_SMALL  &&  bValidIntersAfterJ) {
                      Point5ax Pt5ax ;
-                     Pt5ax.ptP = ptInt - vtLine1 / dLen1 * 2 * EPS_SMALL ;
+                     if ( bValidInters)
+                        Pt5ax.ptP = ptInt - vtLine1 / dLen1 * 2 * EPS_SMALL ;
+                     else {
+                        Vector3d vtNewLine = vPt5ax[i].ptP - vPt5ax[j].ptP ; vtNewLine.Normalize() ;
+                        Pt5ax.ptP =  vPt5ax[i].ptP - vtNewLine * 2 * EPS_SMALL ;
+                     }
                      Pt5ax.vtDir1 = vPt5ax[j].vtDir1 ;
                      Pt5ax.vtDir2 = vPt5ax[j].vtDir2 ;
                      Pt5ax.vtDirU = vPt5ax[j].vtDirU ;
@@ -102,9 +125,14 @@ AddPointsOnCorners( PNT5AXVECTOR& vPt5ax)
                   }
                   else
                      vPt5ax[j].nFlag = P5AX_CVEX ;
-                  if ( dLen2 > 2 * EPS_SMALL) {
+                  if ( dLen2 > 10 * EPS_SMALL  && bValidIntersBeforeI) {
                      Point5ax Pt5ax ;
-                     Pt5ax.ptP = ptInt + vtLine2 / dLen2 * 2 * EPS_SMALL ;
+                     if ( bValidInters)
+                        Pt5ax.ptP = ptInt + vtLine2 / dLen2 * 2 * EPS_SMALL ;
+                     else {
+                        Vector3d vtNewLine = vPt5ax[i].ptP - vPt5ax[j].ptP ; vtNewLine.Normalize() ;
+                        Pt5ax.ptP =  vPt5ax[j].ptP + vtNewLine * 2 * EPS_SMALL ;
+                     }
                      Pt5ax.vtDir1 = vPt5ax[i].vtDir1 ;
                      Pt5ax.vtDir2 = vPt5ax[i].vtDir2 ;
                      Pt5ax.vtDirU = vPt5ax[i].vtDirU ;
@@ -133,6 +161,72 @@ AddPointsOnCorners( PNT5AXVECTOR& vPt5ax)
             }
          }
       }
+      else {
+         // guardo se la proiezione il tratto successivo, lungo la normale precedente + maggiore di un angolo minimo ( angolo interno smooth)
+         Vector3d vtDirNext = vPt5ax[i].ptP - vPt5ax[j].ptP ;
+         vtDirNext.Normalize() ;
+         double dProj1 = vtDirNext * vPt5ax[j].vtDir1 ;
+         double dProj2 = ( - vtDirNext) * vPt5ax[i].vtDir1 ;
+         
+         if (  ( abs( dProj1) > abs( dProj2) ? dProj1 > dSinSmallAngle : dProj2 > dSinSmallAngle)) {
+            // se concavo senza spigolo netto segnalo zona concava smooth
+            vPt5ax[i].nFlag = P5AX_SMOOTH_CONC ;
+         }
+      }
+   }
+
+   int i = 0 ;
+   int j = ssize( vPt5ax) - 1 ;
+   bool bClosed = AreSamePointApprox( vPt5ax[i].ptP, vPt5ax[j].ptP) ;
+   // se la curva è chiusa controllo inizio e fine
+   if ( bClosed) {
+      // se normali tra corrente e precedente oltre limite
+      int k = i + 1 ;
+      int z = j - 1 ;
+      double dProjPrev = ( vPt5ax[z].ptP - vPt5ax[j].ptP) * vPt5ax[i].vtDir1 ;
+      double dProjCurr = ( vPt5ax[k].ptP - vPt5ax[i].ptP) * vPt5ax[j].vtDir1 ;
+      if ( vPt5ax[i].vtDir1 * vPt5ax[j].vtDir1 < COS_ANG_MAX_CORNER) {
+         bool bConvex = ( abs( dProjCurr) > abs( dProjPrev) ? dProjCurr < 0 : dProjPrev < 0) ;
+         if ( i < ssize( vPt5ax) - 2  &&  ! AreSameVectorExact(vPt5ax.back().vtDir1, vPt5ax.back().vtDir2)) {
+            int z = j - 1 ;
+            // se vtDir1 e vtDir2 sono diverse allora sono su uno spigolo
+            double dProjPrev2 = ( vPt5ax[z].ptP - vPt5ax[j].ptP) * vPt5ax[j].vtDir2 ;
+            double dProjCurr2 = ( vPt5ax[i].ptP - vPt5ax[j].ptP) * vPt5ax[j].vtDir1 ;
+            // se uno dei due è convesso allora considero convesso l'angolo
+            bConvex = dProjPrev2 < EPS_SMALL  ||  dProjCurr2 < EPS_SMALL ;
+         }
+         if ( bConvex) {
+            vPt5ax[i].nFlag = P5AX_CVEX ;
+            vPt5ax[i].vtDir2 = vPt5ax[j].vtDir1 ;
+            vPt5ax[j].nFlag = P5AX_CVEX ;
+         }
+         else {
+            vPt5ax[i].nFlag = P5AX_CONC ;
+            vPt5ax[j].nFlag = P5AX_CONC ;
+            Vector3d vtDir1 = Media( vPt5ax[i].vtDir1, vPt5ax[j].vtDir1) ; vtDir1.Normalize() ;
+            Vector3d vtDir2 = Media( vPt5ax[i].vtDir2, vPt5ax[j].vtDir2) ; vtDir2.Normalize() ;
+            Vector3d vtDirU = Media( vPt5ax[i].vtDirU, vPt5ax[j].vtDirU) ; vtDirU.Normalize() ;
+            Vector3d vtDirV = Media( vPt5ax[i].vtDirV, vPt5ax[j].vtDirV) ; vtDirV.Normalize() ;
+            vPt5ax[i].vtDir1 = vtDir1 ;
+            vPt5ax[j].vtDir1 = vtDir1 ;
+            vPt5ax[i].vtDir2 = vtDir2 ;
+            vPt5ax[j].vtDir2 = vtDir2 ;
+            vPt5ax[i].vtDirU = vtDirU ;
+            vPt5ax[j].vtDirU = vtDirU ;
+            vPt5ax[i].vtDirV = vtDirV ;
+            vPt5ax[j].vtDirV = vtDirV ;
+         }
+      }
+      else if (  abs( dProjPrev) > abs( dProjCurr) ? dProjPrev > dSinSmallAngle : dProjCurr > dSinSmallAngle) {
+         vPt5ax[i].nFlag = P5AX_SMOOTH_CONC ;
+         vPt5ax[j].nFlag = P5AX_SMOOTH_CONC ;
+      }
+   }
+
+   // riscorro tutto il vettore per vedere se ho creato delle zone concave smooth frammentate (separate solo da un tratto non classificato concavo), che quindi uniformo
+   for ( int i = 1 ; i < ssize( vPt5ax) - 1 ; ++ i) {
+      if ( vPt5ax[i].nFlag != P5AX_SMOOTH_CONC  &&  vPt5ax[i-1].nFlag == P5AX_SMOOTH_CONC  &&  vPt5ax[i+1].nFlag == P5AX_SMOOTH_CONC)
+         vPt5ax[i].nFlag = P5AX_SMOOTH_CONC ;
    }
    return true ;
 }
@@ -344,7 +438,7 @@ ProjectPointOnSurf( const Point3d& ptP, const CISURFPVECTOR& vpSurf, double dPar
 //----------------------------------------------------------------------------
 bool
 ProjectCurveOnSurf( const ICurve& crCrv, const CISURFPVECTOR& vpSurf,
-                    double dLinTol, double dMaxSegmLen, bool bSharpEdges, PNT5AXVECTOR& vPt5ax)
+                    double dLinTol, double dMaxSegmLen, bool bSharpEdges, PNT5AXVECTOR& vPt5ax, bool bNormOrTang)
 {
   // controllo le tolleranze
    dLinTol = max( dLinTol, LIN_TOL_MIN) ;
@@ -364,21 +458,118 @@ ProjectCurveOnSurf( const ICurve& crCrv, const CISURFPVECTOR& vpSurf,
    vPt5ax.reserve( PL.GetPointNbr()) ;
 
   // proietto i punti della polilinea sulla superficie secondo la direzione di minima distanza
-   double dPar ;
-   Point3d ptP ;
-   bool bFound = PL.GetFirstUPoint( &dPar, &ptP) ;
+   double dPar, dParNext ;
+   Point3d ptP, ptPNext ;
+   Vector3d vtDirPrev = V_INVALID ;
+   if ( PL.IsClosed()) {
+      Point3d pt1, pt2 ;
+      PL.GetLastLine( pt1, pt2) ;
+      vtDirPrev = pt2 - pt1 ;
+   }
+   Vector3d vtLast ; PL.GetLastULine( &dPar, &ptP, &dParNext, &ptPNext) ;
+   vtLast = ptPNext - ptP ; vtLast.Normalize() ;
+   bool bFound = PL.GetFirstULine( &dPar, &ptP, &dParNext, &ptPNext) ;
+   Vector3d vtFirst = ptPNext - ptP ; vtFirst.Normalize() ;
+   bool bClosed = PL.IsClosed() ;
+   bool bLast = false ;
+   Vector3d vtNormPrev = V_INVALID ;
+   Point3d ptPrev ;
+   bool bFirst = true ;
    while ( bFound) {
      // se trovo proiezione, la salvo
       Point5ax Pt5ax ; 
       if ( ProjectPointOnSurf( ptP, vpSurf, dPar, Pt5ax))
          vPt5ax.emplace_back( Pt5ax) ;
-     // passo al successivo
-      bFound = PL.GetNextUPoint( &dPar, &ptP) ;
+      // controllo che la normale trovata sia in linea con la precedente, se i due tratti erano abbastanza allineati
+      bool bRecalc = false ;
+      if ( bFirst)
+         bRecalc = true ;
+      if ( ssize( vPt5ax) > 2) {
+         Point5ax& pt5Curr = vPt5ax.back() ;
+         Point5ax& pt5Prev = vPt5ax.end()[-2] ;
+         Point5ax& pt5PrevPrev = vPt5ax.end()[-3] ;
+         Vector3d vtDirCurr = pt5Curr.ptP - pt5Prev.ptP ; vtDirCurr.Normalize() ;
+         Vector3d vtDirPrev = pt5Prev.ptP - pt5PrevPrev.ptP ; vtDirPrev.Normalize() ;
+         double dProjDir = vtDirCurr * vtDirPrev ;
+         if ( dProjDir > COS_ANG_MAX_CORNER) {
+            double dProjNorm = vPt5ax.back().vtDir1 * vtNormPrev ;
+            if ( dProjNorm < COS_ANG_MAX_CORNER)
+               bRecalc = true ;
+         }
+      }
+      Vector3d vtDirNext = ptPNext - ptP ; vtDirNext.Normalize() ;
+      // se sono arrivato ad uno spigolo tengo la normale appena prima dello spigolo
+      if ( bRecalc) {
+         Point3d ptAlter ;
+         if ( ! bFirst) {
+            Vector3d vtDirPrev = ptP - ptPrev ; vtDirPrev.Normalize() ;
+            ptAlter = ptP - vtDirPrev * 5 * EPS_SMALL ;
+         }
+         else
+            ptAlter = ptP + vtDirNext * 5 * EPS_SMALL ;
+         Point5ax Pt5axRec ;
+         if ( ProjectPointOnSurf( ptAlter, vpSurf, dPar, Pt5axRec)) {
+            // aggiorno solo la vtDir1, la vtDir2 la mantengo con la normale successiva allo spigolo
+            if ( Pt5axRec.vtDir1 * Pt5ax.vtDir1 < COS_ANG_MAX_CORNER)
+               vPt5ax.back().vtDir1 = Pt5axRec.vtDir1 ;
+         }
+      }
+      else if ( ssize( vPt5ax) > 1  &&  vPt5ax.back().vtDir1 * vPt5ax.end()[-2].vtDir1 < COS_ANG_MAX_CORNER) {
+         // se la normale corrente è sufficientemente diversa dalla precedente e i tratti non erano allineati
+         // controllo se il punto precedente erano su uno spigolo, ricalcolando in un punto appena oltre
+         Point3d ptAlter = ptPrev + ( ptP - ptPrev) * 5 * EPS_SMALL ;
+         Point5ax Pt5axRec ;
+         if ( ProjectPointOnSurf( ptAlter, vpSurf, dPar, Pt5axRec)) {
+            // aggiorno solo la vtDir1, la vtDir2 la mantengo con la normale successiva allo spigolo
+            if ( Pt5axRec.vtDir1 * Pt5ax.vtDir1 < COS_ANG_MAX_CORNER)
+               vPt5ax.end()[-2].vtDir1 = Pt5axRec.vtDir1 ;
+         }
+      }
+
+      if ( bLast  &&  bClosed) {
+         // controllo se il punto finale è di spigolo
+         if ( vPt5ax.back().vtDir1 * vPt5ax.front().vtDir1 < COS_ANG_MAX_CORNER) {
+            vPt5ax.back().vtDir2 = vPt5ax.front().vtDir1 ;
+            vPt5ax.front().vtDir2 = vPt5ax.back().vtDir1 ;
+         }
+      }
+      vtNormPrev = vPt5ax.back().vtDir1 ;
+      // se richiesta la tangente anziché la normale allora modifico il vettore associato al punto
+      Vector3d vtDir ;
+      if ( ! bNormOrTang) {
+         Vector3d vtNorm = vPt5ax.back().vtDir1 ;
+         if ( bFirst)
+            vtDir = vtDirNext ;
+         else
+            vtDir = vtDirPrev ;
+         // in caso sia stato superato l'angolo limite dò priorità alla direzione precedente
+         if ( vtDirPrev.IsValid()  &&  (! bFirst  ||  ( bFirst && bClosed))) {
+            double dProj = vtDir * vtDirPrev ;
+            if ( dProj > COS_ANG_MAX_CORNER)
+               vtDir = Media( vtDir, vtDirPrev) ;
+         }
+         vtDirPrev = vtDirNext ;
+         Vector3d vtTang = vtDir ^ vtNorm ; vtTang.Normalize() ;
+         vPt5ax.back().vtDir1 = vtTang ;
+         vPt5ax.back().vtDir2 = vtTang ;
+      }
+      // passo al successivo
+      ptPrev = ptP ;
+      bFound = PL.GetNextULine( &dPar, &ptP, &dParNext, &ptPNext) ;
+      // se sono arrivato alla fine aggiungo l'ultimo punto
+      if ( ! bFound  &&  ! bLast) {
+         bLast = true ;
+         bFound = true ;
+      }
+      if ( bFirst)
+         bFirst = false ;
    }
 
   // se richiesto, inserimento punti intermedi in presenza di spigoli
-   if ( bSharpEdges)
-      AddPointsOnCorners( vPt5ax) ;
+   if ( bSharpEdges) {
+      if ( ! AddPointsOnCorners( vPt5ax))
+         return false ;
+   }
 
   // rimozione punti in eccesso rispetto alle tolleranze
    RemovePointsInExcess( vPt5ax, dLinTol, dMaxSegmLen, bSharpEdges) ;
@@ -1101,3 +1292,132 @@ ProjectCurveOnSurf( const ICurve& crCrv, const CISURFPVECTOR& vpSurf, const ISur
 
    return true ;
 }
+
+//----------------------------------------------------------------------------
+bool
+GetCurveOnSurfInfo( const ICurve& crCrv, const ISurfTriMesh& pSurf,
+                    double dLinTol, double dMaxSegmLen, bool bSharpEdges, PNT5AXVECTOR& vPt5ax, bool bNormOrTang)
+{
+   // controllo le tolleranze
+   dLinTol = max( dLinTol, LIN_TOL_MIN) ;
+   dMaxSegmLen = max( dMaxSegmLen, 10 * EPS_SMALL) ;
+
+   // approssimo la curva con una polilinea entro la tolleranza
+   PolyLine PL ;
+   const double MAX_SEG_LEN = min( dMaxSegmLen, 0.977) ;
+   if ( ! crCrv.ApproxWithLimitedLines( 10 * EPS_SMALL, ANG_TOL_STD_DEG, ICurve::APL_SPECIAL, MAX_SEG_LEN, PL))
+      return false ;
+
+   PL.RemoveAlignedPoints( dLinTol, false, MAX_SEG_LEN) ;
+
+   // Pulisco e riservo spazio nel vettore dei punti risultanti
+   vPt5ax.clear() ;
+   vPt5ax.reserve( PL.GetPointNbr()) ;
+
+   // proietto i punti della polilinea sulla superficie secondo la direzione di minima distanza
+   double dPar, dParNext ;
+   Point3d ptP, ptPNext ;
+   Vector3d vtDirPrev = V_INVALID ;
+   if ( PL.IsClosed()) {
+      Point3d pt1, pt2 ;
+      PL.GetLastLine( pt1, pt2) ;
+      vtDirPrev = pt2 - pt1 ;
+   }
+   Vector3d vtLast ; PL.GetLastULine( &dPar, &ptP, &dParNext, &ptPNext) ;
+   vtLast = ptPNext - ptP ; vtLast.Normalize() ;
+   bool bFound = PL.GetFirstULine( &dPar, &ptP, &dParNext, &ptPNext) ;
+   Vector3d vtFirst = ptPNext - ptP ; vtFirst.Normalize() ;
+   bool bClosed = PL.IsClosed() ;
+   bool bLast = false ;
+   Point3d ptPrev ;
+   bool bFirst = true ;
+   const ICurveComposite* pCC = GetCurveComposite( &crCrv) ;
+   int nTria = -1 ;
+   Triangle3dEx trTria ;
+   while ( bFound) {
+      // se trovo proiezione, la salvo
+      Point5ax Pt5ax ;
+      Pt5ax.ptP = ptP ;
+      Pt5ax.dPar = dPar ;
+      double dDecimal ;
+      bool bJoint = modf( dPar, &dDecimal) == 0.0 ;
+      int nCrv = int( bJoint ? dPar - 1 : dPar) ;
+      if ( nCrv < 0)
+         nCrv = 0 ;
+      int nTriaCurr ; pCC->GetCurveTempProp( nCrv, nTriaCurr, 0) ;
+      if ( nTriaCurr != nTria)
+         pSurf.GetTriangle( nTriaCurr, trTria) ;
+
+      if ( ! CalcNormal( ptP, trTria, Pt5ax.vtDir1))
+         Pt5ax.vtDir1 = trTria.GetN() ;
+      nTria = nTriaCurr ;
+      if ( bJoint) {
+         int nPar = int( dPar) ;
+         if ( bClosed && nPar > pCC->GetCurveCount() - 1)
+            nPar = 0 ;
+         int nTria2 ; pCC->GetCurveTempProp( nPar, nTria2, 0) ;
+         Triangle3dEx trTria2 ; pSurf.GetTriangle( nTria2, trTria2) ;
+         if ( ! CalcNormal( ptP, trTria2, Pt5ax.vtDir2))
+            Pt5ax.vtDir2 = trTria2.GetN() ;
+         nTria = nTria2 ;
+         trTria = trTria2 ;
+      }
+      else
+         Pt5ax.vtDir2 = Pt5ax.vtDir1 ;
+      Pt5ax.vtDirU = V_NULL ;
+      Pt5ax.vtDirV = V_NULL ;
+      Pt5ax.nFlag = P5AX_STD ;
+      vPt5ax.emplace_back( Pt5ax) ;
+
+      Vector3d vtDirNext = ptPNext - ptP ; vtDirNext.Normalize() ;
+      // se richiesta la tangente anziché la normale allora modifico il vettore associato al punto
+      Vector3d vtDir ;
+      if ( ! bNormOrTang) {
+         Vector3d vtNorm = vPt5ax.back().vtDir1 ;
+         if ( bFirst)
+            vtDir = vtDirNext ;
+         else
+            vtDir = vtDirPrev ;
+         // in caso sia stato superato l'angolo limite dò priorità alla direzione precedente
+         bool bEdge = false ;
+         if ( vtDirPrev.IsValid()  &&  (! bFirst  ||  ( bFirst && bClosed))) {
+            double dProj = vtDirNext * vtDirPrev ;
+            bEdge = dProj < COS_ANG_MAX_CORNER ;
+            if ( ! bEdge)
+               vtDir = Media( vtDirNext, vtDirPrev) ;
+         }
+         vtDirPrev = vtDirNext ;
+         bEdge = bEdge  ||  ! AreSameVectorExact( vPt5ax.back().vtDir1, vPt5ax.back().vtDir2) ;
+         Vector3d vtTang = vtDir ^ vtNorm ; vtTang.Normalize() ;
+         vPt5ax.back().vtDir1 = vtTang ;
+         if ( bEdge) {
+            Vector3d vtTang2 = vtDirNext ^ vPt5ax.back().vtDir2 ;
+            vtTang2.Normalize() ;
+            vPt5ax.back().vtDir2 = vtTang2 ;
+         }
+         else
+            vPt5ax.back().vtDir2 = vtTang ;
+      }
+      // passo al successivo
+      ptPrev = ptP ;
+      bFound = PL.GetNextULine( &dPar, &ptP, &dParNext, &ptPNext) ;
+      // se sono arrivato alla fine aggiungo l'ultimo punto
+      if ( ! bFound  &&  ! bLast) {
+         bLast = true ;
+         bFound = true ;
+      }
+      if ( bFirst)
+         bFirst = false ;
+   }
+
+   // se richiesto, inserimento punti intermedi in presenza di spigoli
+   if ( bSharpEdges) {
+      if ( ! AddPointsOnCorners( vPt5ax))
+         return false ;
+   }
+
+   // rimozione punti in eccesso rispetto alle tolleranze
+   RemovePointsInExcess( vPt5ax, dLinTol, dMaxSegmLen, bSharpEdges) ;
+
+   return true ;
+}

SurfBezier.cpp

@@ -5976,103 +5976,6 @@ CalcSyncPointFromEdge( const SHARPEDGEVECTOR& vSharpEdge, const ICurveComposite*
    return true ;
 }
 
-// ---------------------------------------------------------------------------
-// Calcolo della curva di Sync tra un punto di una curva di Bordo (calcolato come il punto a curvatura massima) e il suo
-// associato sull'altra Curva di Bordo
-// -> Restituisce la singola Linea di Sincronizzazione
-static bool
-CalcSyncPointFromCurvature( const CurvaturePoint& PointK, const ICurveComposite* pCompoSubEdge, BIPOINT& SyncLine)
-{
-  // Verifico la validità del SubEdge su cui trovare il punto di Sincronizzazione
-   if ( pCompoSubEdge == nullptr  ||  ! pCompoSubEdge->IsValid())
-      return false ;
-
-  // --- Piano di taglio per punto a distanza minima
-   double dUCurrSubEdge = 0. ;
-   IntersCurvePlane ICP( *pCompoSubEdge, PointK.ptCurvature, Media( PointK.vtTanPrev, PointK.vtTanNext)) ;
-   int nIndParCloser = -1, nIndPointCloser = -1 ;
-   double dSqMinDist = INFINITO ;
-   for ( int nInfo = 0 ; nInfo < ICP.GetIntersCount() ; ++ nInfo) {
-      IntCrvPlnInfo aInfo ;
-      if ( ICP.GetIntCrvPlnInfo( nInfo, aInfo)) {
-         if ( nIndParCloser == -1)
-            nIndParCloser = nInfo ;
-         double dSqDist = SqDist( PointK.ptCurvature, aInfo.Ici[0].ptI) ;
-         if ( dSqDist < dSqMinDist) {
-            dSqMinDist = dSqDist ;
-            nIndPointCloser = nInfo ;
-         }
-      }
-   }
-   bool bOkPlane = ( nIndParCloser != -1 && nIndPointCloser != -1) ;
-   if ( bOkPlane) {
-     // Se gli indici sono tra loro coerenti allora ho individuato il punto
-      if ( nIndParCloser == nIndPointCloser) {
-         IntCrvPlnInfo aInfo ;
-         ICP.GetIntCrvPlnInfo( nIndParCloser, aInfo) ;
-         dUCurrSubEdge = aInfo.Ici[0].dU ;
-      }
-     // Se gli indici sono discordi, devo scegliere quale dei due punti tenere
-      else {
-        // scelgo il punto più vicino al corrente
-         IntCrvPlnInfo aInfoPt, aInfoPar ;
-         ICP.GetIntCrvPlnInfo( nIndPointCloser, aInfoPt) ;
-         ICP.GetIntCrvPlnInfo( nIndParCloser, aInfoPar) ;
-         dUCurrSubEdge = ( SqDist( PointK.ptCurvature, aInfoPt.Ici[0].ptI) < SqDist( PointK.ptCurvature, aInfoPar.Ici[0].ptI) ?
-                           aInfoPt.Ici[0].dU : aInfoPar.Ici[0].dU) ;
-      }
-   }
-   if ( ! bOkPlane) {
-     // --- Altrimenti, cerco il punto a minima distanza
-      DistPointCurve DPC( PointK.ptCurvature, *pCompoSubEdge) ;
-      int nFlag ;
-      bool bOkMinDist = ( DPC.GetParamAtMinDistPoint( 0., dUCurrSubEdge, nFlag)) ;
-      if ( ! bOkMinDist) {
-        // --- Alla peggio mi posiziono a metà tra la posizione corrente e quella finale
-         double dPrevLen ; pCompoSubEdge->GetLengthAtParam( 0., dPrevLen) ;
-         double dLen ; pCompoSubEdge->GetLength( dLen) ;
-         pCompoSubEdge->GetParamAtLength( ( dPrevLen + dLen) / 2., dUCurrSubEdge) ;
-      }
-   }
-
-  // Definisco il primo estremo della linea di Sincronizzazione corrente
-   SyncLine.first = PointK.ptCurvature ;
-
-  // Verifico se posso muovermi attorno al punto trovato per allinearmi meglio con le normali alla curva
-  // NB. Si cerca di privilgiare i punti più vicini ( in parametro) al punto calcolato sopra, in modo da cercare di
-  //     non discostare troppo la Linea di sincronizzazione dal punto trovato.
-   const double MAX_DIST = 2.5 ;
-   const int NUM_SAMPLE_PNT = 20 ;
-   double dLen ; pCompoSubEdge->GetLength( dLen) ;
-   double dSyncLen ; pCompoSubEdge->GetLengthAtParam( dUCurrSubEdge, dSyncLen) ;
-   Vector3d vtSyncTanPrev, vtSyncTanNext ;
-   pCompoSubEdge->GetPointD1D2( dUCurrSubEdge, ICurve::FROM_MINUS, SyncLine.second, &vtSyncTanPrev) ; vtSyncTanPrev.Normalize() ;
-   pCompoSubEdge->GetPointD1D2( dUCurrSubEdge, ICurve::FROM_PLUS, SyncLine.second, &vtSyncTanNext) ; vtSyncTanNext.Normalize() ;
-   double dLimInfLen = Clamp( dSyncLen - MAX_DIST, 0., dLen) ;
-   double dLimSupLen = Clamp( dSyncLen + MAX_DIST, 0., dLen) ;
-   int nSamplePnt = int( ceil( NUM_SAMPLE_PNT / 4.)) ;
-   double dMaxCos = ( Media( PointK.vtTanPrev, PointK.vtTanNext) * Media( vtSyncTanPrev, vtSyncTanNext)) ;
-   double dShiftR = ( dLimSupLen - dSyncLen) / nSamplePnt ;
-   double dShiftL = ( dSyncLen - dLimInfLen) / nSamplePnt ;
-   array<double, 2> vdLens = { dSyncLen, dSyncLen} ;
-   for ( int i = 1 ; i <= nSamplePnt ; ++ i) {
-      vdLens[0] += dShiftR ;
-      vdLens[1] -= dShiftL ;
-      for ( int j = 0 ; j < 2 ; ++ j) {
-         double dU ; pCompoSubEdge->GetParamAtLength( vdLens[j], dU) ;
-         Point3d ptCurr ; Vector3d vtTan ;
-         pCompoSubEdge->GetPointD1D2( dU, ICurve::FROM_MINUS, ptCurr, &vtTan) ; vtTan.Normalize() ;
-         double dCos = ( vtTan * Media( PointK.vtTanPrev, PointK.vtTanNext)) ;
-         if ( dCos > dMaxCos) {
-            dMaxCos = dCos ;
-            SyncLine.second = ptCurr ;
-         }
-      }
-   }
-
-   return true ;
-}
-
 // ---------------------------------------------------------------------------
 // Gestione degli spigoli all'interno della Quadrangolazione corrente
 static bool
@@ -6184,7 +6087,7 @@ ManageEdgesInQuadrangulation( const ICurveComposite* pSubEdge1, const ICurveComp
 // ---------------------------------------------------------------------------
 // Calcolo delle Curve di Sync per evitare Twist
 static bool
-ManageTwistInQuadrangulation( const ICurveComposite* pSubEdge1, const ICurveComposite* pSubEdge2, BIPNTVECTOR& vSyncLines)
+ManageTwistInQuadrangulation( const ICurveComposite* pSubEdge1, const ICurveComposite* pSubEdge2, BIPNTVECTOR& vSyncLines, bool& bEraseLastIso)
 {
   // Verifica validità delle curve
    if ( pSubEdge1 == nullptr  ||  ! pSubEdge1->IsValid()  ||  pSubEdge2 == nullptr  ||  ! pSubEdge2->IsValid())
@@ -6192,24 +6095,29 @@ ManageTwistInQuadrangulation( const ICurveComposite* pSubEdge1, const ICurveComp
 
    const double COS_LIMIT = cos( 50. * DEGTORAD) ;
    const int NUM_SAMPLE_PNT = 20 ;
+   const int nStepSkip = NUM_SAMPLE_PNT / 10 ;
    #if DEBUG_CURVATURE
       vector<pair<Point3d, double>> _vPtK1 ;
       vector<pair<Point3d, double>> _vPtK2 ;
       IGeomDB* pGeomDB = GetCurrGeomDB() ;
       VERIFY_GEOMDB( pGeomDB, false)
    #endif
-
+   
+   int nLastSync = ssize( vSyncLines) ;
   // --- Verifico il cambiamento di Deviazione angolare tra Inizio-Fine della prima curva di Bordo
    Vector3d vtS1 ; pSubEdge1->GetStartDir( vtS1) ;
    Vector3d vtE1 ; pSubEdge1->GetEndDir( vtE1) ;
    double dLen1 = - EPS_SMALL ;
+   double dLen2 = - EPS_SMALL ;
+   pSubEdge1->GetLength( dLen1) ;
+   pSubEdge2->GetLength( dLen2) ;
+   double dMyDist = min( dLen1, dLen2) * 0.85 ;
    bool bSplit1 = ( vtS1 * vtE1 < COS_LIMIT) ; 
    if ( bSplit1) {
      // Individuo il punto a Curvatura Massima
-      pSubEdge1->GetLength( dLen1) ;
       double dKMax1 = - INFINITO + 1, dUK1Max = - EPS_SMALL ;
       Point3d ptKMax1 ; Vector3d vtTanKMax1Prev, vtTanKMax1Next ;
-      for ( int i = 0 ; i <= NUM_SAMPLE_PNT ; ++ i) {
+      for ( int i = nStepSkip ; i <= NUM_SAMPLE_PNT - nStepSkip ; ++ i) {
         // Ricavo la Lunghezza corrente e il parametro dU associato
          double dCurrLen1 = Clamp( i * ( dLen1 / NUM_SAMPLE_PNT), 0., dLen1) ;
          double dUCurr1 ; pSubEdge1->GetParamAtLength( dCurrLen1, dUCurr1) ;
@@ -6237,22 +6145,21 @@ ManageTwistInQuadrangulation( const ICurveComposite* pSubEdge1, const ICurveComp
       vtTanKMax1Next.Normalize() ;
      // Calcolo la nuova linea di sincronizzazione
       CurvaturePoint myCurvaturePoint( dUK1Max, ptKMax1, vtTanKMax1Prev, vtTanKMax1Next) ;
-      BIPOINT SyncLine ;
-      CalcSyncPointFromCurvature( myCurvaturePoint, pSubEdge2, SyncLine) ;
-      vSyncLines.emplace_back( SyncLine) ;
+      double dUOn2 ; double dLenCurr2 ;
+      GetIsoPointOnSecondCurve( pSubEdge1, pSubEdge2, dUK1Max, dUOn2, dMyDist, 0, 0, dLenCurr2, dLen2) ;
+      Point3d ptOn2 ; pSubEdge2->GetPointD1D2( dUOn2, ICurve::FROM_MINUS, ptOn2) ;
+      vSyncLines.emplace_back( ptKMax1, ptOn2) ;
    }
 
   // --- Verifico il cambiamento di Deviazione angolare tra Inizio-Fine del tratto per la prima curva di Bordo
    Vector3d vtS2 ; pSubEdge2->GetStartDir( vtS2) ;
    Vector3d vtE2 ; pSubEdge2->GetEndDir( vtE2) ;
-   double dLen2 = - EPS_SMALL ;
    bool bSplit2 = ( vtS2 * vtE2 < COS_LIMIT) ;
    if ( bSplit2) {
      // Individuo il punto a Curvatura Massima
-      pSubEdge2->GetLength( dLen2) ;
       double dKMax2 = - INFINITO + 1, dUK2Max = - EPS_SMALL ;
       Point3d ptKMax2 ; Vector3d vtTanKMax2Prev, vtTanKMax2Next ;
-      for ( int i = 0 ; i <= NUM_SAMPLE_PNT ; ++ i) {
+      for ( int i = nStepSkip ; i <= NUM_SAMPLE_PNT - nStepSkip ; ++ i) {
         // Ricavo la Lunghezza corrente e il parametro dU associato
          double dCurrLen2 = Clamp( i * ( dLen2 / NUM_SAMPLE_PNT), 0., dLen2) ;
          double dUCurr2 ; pSubEdge2->GetParamAtLength( dCurrLen2, dUCurr2) ;
@@ -6280,11 +6187,10 @@ ManageTwistInQuadrangulation( const ICurveComposite* pSubEdge1, const ICurveComp
       vtTanKMax2Next.Normalize() ;
      // Calcolo la nuova linea di sincronizzazione
       CurvaturePoint myCurvaturePoint( dUK2Max, ptKMax2, vtTanKMax2Prev, vtTanKMax2Next) ;
-      BIPOINT SyncLine ;
-      CalcSyncPointFromCurvature( myCurvaturePoint, pSubEdge1, SyncLine) ;
-     // !<-- Inverto la curva di Sincronizzaione per coerenza con la prima -->!
-      swap( SyncLine.first, SyncLine.second) ;
-      vSyncLines.emplace_back( SyncLine) ;
+      double dUOn1 ; double dLenCurr1 ;
+      GetIsoPointOnSecondCurve( pSubEdge2, pSubEdge1, dUK2Max, dUOn1, dMyDist, 0, 0, dLenCurr1, dLen1) ;
+      Point3d ptOn1 ; pSubEdge1->GetPointD1D2( dUOn1, ICurve::FROM_MINUS, ptOn1) ;
+      vSyncLines.emplace_back( ptOn1, ptKMax2) ;
    }
 
    #if DEBUG_CURVATURE // Curvatura minima -> AQUA | Curvatura massima -> ORANGE
@@ -6329,7 +6235,7 @@ ManageTwistInQuadrangulation( const ICurveComposite* pSubEdge1, const ICurveComp
    #endif
 
   // Se non ho alcuna linea di sincronizzazione, non faccio nulla
-   if ( vSyncLines.empty())
+   if ( vSyncLines.empty()  ||  ( ! bSplit2 && ! bSplit1))
       return true ;
 
    const double TOL = 250. * EPS_SMALL ;
@@ -6338,42 +6244,54 @@ ManageTwistInQuadrangulation( const ICurveComposite* pSubEdge1, const ICurveComp
   // NB. Risultano ridondanti, creano SottoQuadrangolazioni molto strette o possono Inclinare eccssivamente l'Utensile
   // NB. Così facendo evito anche di creare curve di Sync lungo le diagonali della Quadrangolazione
    const double LEN_TOL = 2. ;
-   for ( int i = 0 ; i < ssize( vSyncLines) ; ++ i) {
+   const double dParTol = 0.1 ;
+   double dLenPrev1 = - LEN_TOL, dLenPrev2 = - LEN_TOL ;
+   for ( int i = nLastSync ; i < ssize( vSyncLines) ; ++ i) {
       double dSyncLen1 ; pSubEdge1->GetLengthAtPoint( vSyncLines[i].first, dSyncLen1, TOL) ;
-      bool bErase = ( dSyncLen1 < max( LEN_TOL, 0.2 * dLen1)  ||  dSyncLen1 > min( dLen1 - LEN_TOL, 0.8 * dLen1)) ;
+      bool bErase = ( dSyncLen1 < max( LEN_TOL, dParTol * dLen1)  ||  dSyncLen1 - dLenPrev1 < LEN_TOL) ;
+      bEraseLastIso = dSyncLen1 > min( dLen1 - LEN_TOL, ( 1 - dParTol) * dLen1) ;
       if ( ! bErase) {
          double dSyncLen2 ; pSubEdge2->GetLengthAtPoint( vSyncLines[i].second, dSyncLen2, TOL) ;
-         bErase = ( dSyncLen2 < max( LEN_TOL, 0.2 * dLen2)  ||  dSyncLen2 > min( dLen2 - LEN_TOL, 0.8 * dLen2)) ;
+         bErase = ( dSyncLen2 < max( LEN_TOL, dParTol * dLen2)  ||  dSyncLen2 - dLenPrev2 < LEN_TOL) ;
+         bEraseLastIso = bEraseLastIso  ||  dSyncLen2 > min( dLen2 - LEN_TOL, ( 1 - dParTol) * dLen2) ;
+         dLenPrev2 = dSyncLen2 ;
       }
-      if ( bErase) {
+      if ( bErase  &&  ! bEraseLastIso) {
          vSyncLines.erase( vSyncLines.begin() + i) ;
          -- i ;
       }
+      dLenPrev1 = dSyncLen1 ;
+      if ( bEraseLastIso)
+         break ;
    }
    if ( vSyncLines.empty())
       return true ;
 
   // Se due curve di Sincronizzazione rimaste
-   if ( ssize( vSyncLines) == 2) {
+   if ( ssize( vSyncLines) - nLastSync == 2) {
      // Se si sovrappongono, ne elimino una
-      if ( AreSamePointEpsilon( vSyncLines[0].first, vSyncLines[1].first, LEN_TOL)  &&
-           AreSamePointEpsilon( vSyncLines[0].second, vSyncLines[1].second, LEN_TOL))
+      if ( AreSamePointEpsilon( vSyncLines.end()[-2].first, vSyncLines.end()[-1].first, LEN_TOL)  &&
+           AreSamePointEpsilon( vSyncLines.end()[-2].second, vSyncLines.end()[-1].second, LEN_TOL))
          vSyncLines.pop_back() ;
    }
   // Se due curve di Sincronizzazione rimaste
-   if ( ssize( vSyncLines) == 2) {
+   if ( ssize( vSyncLines) - nLastSync == 2) {
      // Ordino tutte le linee di sincronizzazione in base al parametro dU della curva principale
-      double dU0 ; pSubEdge1->GetParamAtPoint( vSyncLines[0].first, dU0, TOL) ;
-      double dU1 ; pSubEdge1->GetParamAtPoint( vSyncLines[1].first, dU1, TOL) ;
+      double dU0 ; pSubEdge1->GetParamAtPoint( vSyncLines.end()[-2].first, dU0, TOL) ;
+      double dU1 ; pSubEdge1->GetParamAtPoint( vSyncLines.end()[-1].first, dU1, TOL) ;
       if ( dU0 > dU1 - EPS_SMALL)
-         swap( vSyncLines[0], vSyncLines[1]) ;
+         swap( vSyncLines.end()[-2], vSyncLines[-1]) ;
      // Verifico che le curve non si intreccino
-      pSubEdge2->GetParamAtPoint( vSyncLines[0].second, dU0, TOL) ;
-      pSubEdge2->GetParamAtPoint( vSyncLines[1].second, dU1, TOL) ;
+      pSubEdge2->GetParamAtPoint( vSyncLines.end()[-2].second, dU0, TOL) ;
+      pSubEdge2->GetParamAtPoint( vSyncLines.end()[-1].second, dU1, TOL) ;
       if ( dU0 > dU1 - EPS_SMALL)
          vSyncLines.pop_back() ; // lascio solo la prima... ( bisognerebbe scegliere quale lasciare con un criterio migliore ?)
    }
 
+   // se ne ho due tengo solo la prima
+   if ( ssize( vSyncLines) - nLastSync == 2)
+      vSyncLines.pop_back() ;
+
    return true ;
 }
 
@@ -6420,11 +6338,11 @@ SurfBezier::CreateSmoothRuledByTwoCurves( const ICurve* pCurve0, const ICurve* p
       // Recupero dU, Point3d e dLen corrente sul primo bordo, per un incremento del passo di campionamento
       dLenCurr1 = Clamp( dLenPrev1 + dMyDist, 0., dLen1) ;
       pCrvEdge1->GetParamAtLength( dLenCurr1, dUCurr1) ;
-      //// se sono abbastanza vicino ad una joint allora prendo quel punto
-      //double dUClosestJoint1 = round( dUCurr1) ;
-      //double dLenAlt1 = 0 ; pCrvEdge1->GetLengthAtParam( dUClosestJoint1, dLenAlt1) ;
-      //if ( abs( dLenCurr1 - dLenAlt1) < 1)
-      //   dUCurr1 = dUClosestJoint1 ;
+      // se sono abbastanza vicino ad una joint allora prendo quel punto
+      double dUClosestJoint1 = round( dUCurr1) ;
+      double dLenAlt1 = 0 ; pCrvEdge1->GetLengthAtParam( dUClosestJoint1, dLenAlt1) ;
+      if ( abs( dLenCurr1 - dLenAlt1) < 1)
+         dUCurr1 = dUClosestJoint1 ;
       pCrvEdge1->GetPointD1D2( dUCurr1, ICurve::FROM_MINUS, ptCurr1, &vtCurr1) ;
       vtCurr1.Normalize() ;
 
@@ -6437,14 +6355,17 @@ SurfBezier::CreateSmoothRuledByTwoCurves( const ICurve* pCurve0, const ICurve* p
 
       GetIsoPointOnSecondCurve( pCrvEdge1, pCrvEdge2, dUCurr1, dUCurr2, dMyDist, dUPrev2, dLenPrev2, dLenCurr2, dLen2) ;
 
+      //////////////////////////N.B.: se si aggiunge questo pezzo bisogna anche gestire il fatto che i punti precedentemente aggiunti potrebbero non stare più sulla curva modificata!!!
       //// verifico se sono vicino ad una joint esistente allora modifico la curva 2
       //double dUClosestJoint2 = round( dUCurr2) ;
       //double dLenAlt2 = 0 ; pCrvEdge2->GetLengthAtParam( dUClosestJoint2, dLenAlt2) ;
-      //if ( abs( dLenCurr1 - dLenAlt2) < 1) {
-      //   Point3d ptNewJoint ; pCrvEdge2->GetPointD1D2( dUClosestJoint2, ICurve::FROM_MINUS, ptNewJoint) ;
-      //   pCrvEdge2->ModifyJoint( int( dUClosestJoint2), ptNewJoint) ;
-      //   dUCurr2 = dUClosestJoint2 ;
+      //if ( abs( dLenCurr2 - dLenAlt2) < 1) {
+      //   Point3d ptNewJoint ; pCrvEdge2->GetPointD1D2( dUCurr2, ICurve::FROM_MINUS, ptNewJoint) ;
+      //   if ( pCrvEdge2->ModifyJoint( int( dUClosestJoint2), ptNewJoint))
+      //      dUCurr2 = dUClosestJoint2 ;
       //}
+
+
       pCrvEdge2->GetPointD1D2( dUCurr2, ICurve::FROM_MINUS, ptCurr2, &vtCurr2) ;
 
 #if DEBUG_SYNCLINES
@@ -6455,10 +6376,6 @@ SurfBezier::CreateSmoothRuledByTwoCurves( const ICurve* pCurve0, const ICurve* p
 #endif
       vSyncLines.emplace_back( ptCurr1, ptCurr2) ;
 
-      //// Inserisco le curve di sincronizzazione nel Layer di destinazine
-      //PtrOwner<ICurveLine> pLine( CreateCurveLine()) ; pLine->Set( ptCurr1, ptCurr2) ;
-      //pGeomDB->AddGeoObj( GDB_ID_NULL, nDestGrp, Release( pLine)) ;
-
       // --- Analisi degli spigoli all'interno della Quadrangolazione corrente ---
       // NB. Non è sempre detto che uno spigolo di una curva sia sincronizzato con lo spigolo di un'altra ( se questi esistono)...
       // Pertanto la Bezier Ruled ricavata non è detto che sia in grado di approssimare lo spigolo correttamente, potrebbe sdondarlo
@@ -6466,25 +6383,21 @@ SurfBezier::CreateSmoothRuledByTwoCurves( const ICurve* pCurve0, const ICurve* p
       PtrOwner<ICurveComposite> pCrvQuad2( ConvertCurveToComposite( pCrvEdge2->CopyParamRange( dUPrev2, dUCurr2))) ;
       BIPNTVECTOR vEdgeSyncLines ;
       ManageEdgesInQuadrangulation( pCrvQuad1, pCrvQuad2, vEdgeSyncLines) ;
-      //for ( int i = 0 ; i < ssize( vEdgeSyncLines) ; ++ i) {
-      //   PtrOwner<ICurveLine> pLine( CreateCurveLine()) ; pLine->Set( vEdgeSyncLines[i].first, vEdgeSyncLines[i].second) ;
-      //   int nNewId = pGeomDB->AddGeoObj( GDB_ID_NULL, nDestGrp, Release( pLine)) ;
-      //   pGeomDB->SetMaterial( nNewId, GREEN) ;
-      //}
 
       // --- Aggiunta di Linee di Sync all'interno della Quandrangolazione corrente ---
       // Perchè parametrizzando per la lunghezza i SottoTratti ricavati, nel caso di elevate variazioni angolari tra l'inizio e la fine
       // ( tra due curva di Sync) si potrebbero generare delle torsioni non volute
       // -->! NB. Queste linee vengono create considerando le SubQuadrangolazioni con gli Spigoli. !<--
       BIPNTVECTOR vTwistSyncLines ;
+      bool bEraseLastIso = false ;
       if ( vEdgeSyncLines.empty())
-         ManageTwistInQuadrangulation( pCrvQuad1, pCrvQuad2, vTwistSyncLines) ;
+         ManageTwistInQuadrangulation( pCrvQuad1, pCrvQuad2, vTwistSyncLines, bEraseLastIso) ;
       else {
          BIPOINT SyncLinePrev, SyncLineNext ;
          pCrvQuad1->GetStartPoint( SyncLinePrev.first) ;
          pCrvQuad2->GetStartPoint( SyncLinePrev.second) ;
-         for ( int i = 0 ; i < ssize( vEdgeSyncLines) ; ++ i) {
-            if ( i == ssize( vEdgeSyncLines) - 1) {
+         for ( int i = 0 ; i <= ssize( vEdgeSyncLines) ; ++ i) {
+            if ( i == ssize( vEdgeSyncLines)) {
                pCrvQuad1->GetEndPoint( SyncLineNext.first) ;
                pCrvQuad2->GetEndPoint( SyncLineNext.second) ;
             }
@@ -6499,13 +6412,21 @@ SurfBezier::CreateSmoothRuledByTwoCurves( const ICurve* pCurve0, const ICurve* p
             pCrvQuad1->GetParamAtPoint( SyncLineNext.first, dUE1) ;
             pCrvQuad2->GetParamAtPoint( SyncLineNext.second, dUE2) ;
             PtrOwner<ICurveComposite> pCrvSubQuad1( ConvertCurveToComposite( pCrvQuad1->CopyParamRange( dUS1, dUE1))) ;
-            PtrOwner<ICurveComposite> pCrvSubQuad2( ConvertCurveToComposite( pCrvQuad2->CopyParamRange( dUE1, dUE2))) ;
-            ManageTwistInQuadrangulation( pCrvSubQuad1, pCrvSubQuad2, vTwistSyncLines) ;
+            PtrOwner<ICurveComposite> pCrvSubQuad2( ConvertCurveToComposite( pCrvQuad2->CopyParamRange( dUS2, dUE2))) ;
+            ManageTwistInQuadrangulation( pCrvSubQuad1, pCrvSubQuad2, vTwistSyncLines, bEraseLastIso) ;
             // Aggiorno i parametri
             SyncLinePrev = SyncLineNext ;
          }
+         bEraseLastIso = false ;
       }
-      // aggiungo le nuove curve ( non importa che siano in ordine di parametro)
+      if ( bEraseLastIso) {
+         vSyncLines.pop_back() ;
+         double dQuadLen1 ; pCrvQuad1->GetLengthAtPoint( vTwistSyncLines[0].first, dQuadLen1) ;
+         dLenCurr1 = dLenPrev1 + dQuadLen1 ;
+         double dQuadLen2 ; pCrvQuad2->GetLengthAtPoint( vTwistSyncLines[0].second, dQuadLen2) ;
+         dLenCurr2 = dLenPrev2 + dQuadLen2 ;
+      }
+      // aggiungo le nuove curve ( non importa che siano ordinate per parametro)
       vSyncLines.insert( vSyncLines.end(), vEdgeSyncLines.begin(), vEdgeSyncLines.end()) ;
       vSyncLines.insert( vSyncLines.end(), vTwistSyncLines.begin(), vTwistSyncLines.end()) ;
 
@@ -6518,8 +6439,6 @@ SurfBezier::CreateSmoothRuledByTwoCurves( const ICurve* pCurve0, const ICurve* p
       SaveGeoObj( vGeo, vCol, "D:\\Temp\\bezier\\ruled\\trimming\\smooth.nge") ;
    #endif
 
-
-   // devo riempire vSyncLines
    return CreateByIsoParamSet( pCrvEdge1, pCrvEdge2, vSyncLines) ;
 }
 
@@ -7027,14 +6946,18 @@ SurfBezier::CreateByIsoParamSet( const ICurve* pCurve0, const ICurve* pCurve1, c
       if ( vIso[c].dParam0 < dLastParam0) {
          if ( dLastParam0 - vIso[c].dParam0 < EPS_ZERO)
             vIso[c].dParam0 = dLastParam0 + EPS_PARAM ;
-         else 
+         else {
+            LOG_DBG_ERR( GetEGkLogger(), "ERROR : Bezier Surface couldn't be created with the isocurves provided") ;
             return false ;
+         }
       }
       if ( vIso[c].dParam1 < dLastParam1) {
          if ( dLastParam1 - vIso[c].dParam1 < EPS_ZERO)
             vIso[c].dParam1 = dLastParam1 + EPS_PARAM ;
-         else
+         else {
+            LOG_DBG_ERR( GetEGkLogger(), "ERROR : Bezier Surface couldn't be created with the isocurves provided") ;
             return false ;
+         }
       }
       dLastParam0 = vIso[c].dParam0 ;
       dLastParam1 = vIso[c].dParam1 ;

SurfTriMesh.cpp

@@ -1150,7 +1150,7 @@ SurfTriMesh::MarchOneTria( int& nT, int& nV, int nTimeStamp,
 
 //----------------------------------------------------------------------------
 bool
-SurfTriMesh::GetSilhouette( const Vector3d& vtDir, double dTol, POLYLINEVECTOR& vPL, bool bAllTria) const
+SurfTriMesh::GetSilhouette( const Vector3d& vtDir, double dTol, POLYLINEVECTOR& vPL, bool bAllTria, double dLinTol) const
 {
   // Verifico lo stato
    if ( m_nStatus != OK)
@@ -1163,6 +1163,7 @@ SurfTriMesh::GetSilhouette( const Vector3d& vtDir, double dTol, POLYLINEVECTOR&
 
   // Controlli su tolleranza
    dTol = max( dTol, 100 * EPS_SMALL) ;
+   double dMyLinTol = max( EPS_SMALL, dLinTol) ;
 
   // Determino il riferimento di proiezione
    Frame3d frOCS ; frOCS.Set( ORIG, vtVers) ;
@@ -1182,14 +1183,16 @@ SurfTriMesh::GetSilhouette( const Vector3d& vtDir, double dTol, POLYLINEVECTOR&
              ( ! bAllTria  &&  Tria.GetN() * vtVers > EPS_ZERO))  &&
            Tria.Scale( frOCS, 1, 1, 0)  &&  Tria.GetSqMinHeight() > SQ_EPS_SMALL) {
          PtrOwner<SurfFlatRegion> pSfrTria( GetBasicSurfFlatRegion( GetSurfFlatRegionFromTriangle( Tria))) ;
-         if ( ! IsNull( pSfrTria)) {
+         if ( ! IsNull( pSfrTria)  &&  pSfrTria->IsValid()) {
             if ( bAllTria  &&  Tria.GetN() * vtVers < 0)
                pSfrTria->Invert() ;
             pSfrTria->Offset( dTol, ICurve::OFF_FILLET) ;
             if ( IsNull( pSfr))
                pSfr.Set( pSfrTria) ;
-            else
-               pSfr->Add( *pSfrTria) ;
+            else {
+               if ( ! pSfr->Add( *pSfrTria))
+                  return false ;
+            }
          }
       }
      // passo al successivo
@@ -1201,14 +1204,18 @@ SurfTriMesh::GetSilhouette( const Vector3d& vtDir, double dTol, POLYLINEVECTOR&
       return false ;
 
   // Effettuo contro-offset
-   pSfr->Offset( -dTol, ICurve::OFF_EXTEND) ;
+   if ( ! pSfr->Offset( -dTol, ICurve::OFF_EXTEND))
+      return false ;
 
   // Recupero i contorni della regione
    for ( int i = 0 ; i < pSfr->GetChunkCount() ; ++ i) {
       for ( int j = 0 ; j < pSfr->GetLoopCount( i) ; ++ j) {
          PolyLine PL ;
-         if ( pSfr->ApproxLoopWithLines( i, j, LIN_TOL_STD, ANG_TOL_STD_DEG, ICurve::APL_STD, PL))
-            vPL.emplace_back( PL) ;
+         if ( ! pSfr->ApproxLoopWithLines( i, j, dMyLinTol, ANG_TOL_STD_DEG, ICurve::APL_STD, PL)) {
+            vPL.clear() ;
+            return false ;
+         }
+         vPL.emplace_back( PL) ;
       }
    }
 
@@ -1217,7 +1224,7 @@ SurfTriMesh::GetSilhouette( const Vector3d& vtDir, double dTol, POLYLINEVECTOR&
 
 //----------------------------------------------------------------------------
 bool
-SurfTriMesh::GetSilhouette( const Plane3d& plPlane, double dTol, POLYLINEVECTOR& vPL, bool bAllTria) const
+SurfTriMesh::GetSilhouette( const Plane3d& plPlane, double dTol, POLYLINEVECTOR& vPL, bool bAllTria, double dLinTol) const
 {
   // Verifico lo stato
    if ( m_nStatus != OK)
@@ -1230,6 +1237,7 @@ SurfTriMesh::GetSilhouette( const Plane3d& plPlane, double dTol, POLYLINEVECTOR&
 
   // Controlli su tolleranza
    dTol = max( dTol, 100 * EPS_SMALL) ;
+   double dMyLinTol = max( EPS_SMALL, dLinTol) ;
 
   // Determino il riferimento di proiezione
    Frame3d frOCS ; frOCS.Set( plPlane.GetPoint(), vtVers) ;
@@ -1253,14 +1261,16 @@ SurfTriMesh::GetSilhouette( const Plane3d& plPlane, double dTol, POLYLINEVECTOR&
            // lo proietto sul piano e creo la regione
             if ( pgTria.Scale( frOCS, 1, 1, 0)) {
                PtrOwner<SurfFlatRegion> pSfrTria( GetBasicSurfFlatRegion( GetSurfFlatRegionFromPolyLine( pgTria.GetPolyLine()))) ;
-               if ( ! IsNull( pSfrTria)) {
+               if ( ! IsNull( pSfrTria)  &&  pSfrTria->IsValid()) {
                   if ( bAllTria  &&  Tria.GetN() * vtVers < 0)
                      pSfrTria->Invert() ;
                   pSfrTria->Offset( dTol, ICurve::OFF_FILLET) ;
                   if ( IsNull( pSfr))
                      pSfr.Set( pSfrTria) ;
-                  else
-                     pSfr->Add( *pSfrTria) ;
+                  else {
+                     if ( ! pSfr->Add( *pSfrTria))
+                        return false ;
+                  }
                }
             }
          }
@@ -1274,14 +1284,18 @@ SurfTriMesh::GetSilhouette( const Plane3d& plPlane, double dTol, POLYLINEVECTOR&
       return true ;
 
   // Effettuo contro-offset
-   pSfr->Offset( -dTol, ICurve::OFF_EXTEND) ;
+   if ( ! pSfr->Offset( -dTol, ICurve::OFF_EXTEND))
+      return false ;
 
   // Recupero i contorni della regione
    for ( int i = 0 ; i < pSfr->GetChunkCount() ; ++ i) {
       for ( int j = 0 ; j < pSfr->GetLoopCount( i) ; ++ j) {
          PolyLine PL ;
-         if ( pSfr->ApproxLoopWithLines( i, j, LIN_TOL_STD, ANG_TOL_STD_DEG, ICurve::APL_STD, PL))
-            vPL.emplace_back( PL) ;
+         if ( ! pSfr->ApproxLoopWithLines( i, j, dMyLinTol, ANG_TOL_STD_DEG, ICurve::APL_STD, PL)) {
+            vPL.clear() ;
+            return false ;
+         }
+         vPL.emplace_back( PL) ;
       }
    }
 
@@ -3810,12 +3824,19 @@ SurfTriMesh::VerifyConnection( bool bShellsAndParts) const
       BBox3d b3Box ;
       PtrOwner<ISurfTriMesh> pStmShell ;
    } ;
+  // vettore di shell con vettori dei propri triangoli (per accelerare nei casi degeneri)  
+   INTMATRIX mShellTria( m_nShells) ;
+   for ( int i = 0 ; i < ssize( m_vTria) ; ++ i) {
+      if ( m_vTria[i].nShell < m_nShells)
+         mShellTria[m_vTria[i].nShell].push_back( i) ;
+   }
+  // classificazione delle shell
    vector<SHELLINFO> vOuterShells ;
    vector<SHELLINFO> vInnerShells ;
    INTVECTOR vOpenShells ;
    for ( int nSh = 0 ; nSh < m_nShells ; ++ nSh) {
      // se la shell è chiusa
-      if ( IsShellClosed( nSh)) {
+      if ( ssize( mShellTria[nSh]) >= 4  &&  IsShellClosed( nSh)) {
         // creo una superficie clonata dalla shell
          PtrOwner<ISurfTriMesh> pStmShell( CloneShell( nSh)) ;
          if ( IsNull( pStmShell)  ||  ! pStmShell->IsValid())
@@ -3827,7 +3848,9 @@ SurfTriMesh::VerifyConnection( bool bShellsAndParts) const
          BBox3d b3Box ;
          pStmShell->GetLocalBBox( b3Box, BBF_STANDARD) ;
         // la inserisco nel vettore opportuno
-         if ( dVol > 0)
+         if ( abs( dVol) < 1 * 1 * EPS_SMALL)
+            vOpenShells.push_back( nSh) ;
+         else if ( dVol > 0)
             vOuterShells.emplace_back( nSh, dVol, b3Box, Release( pStmShell)) ;
          else
             vInnerShells.emplace_back( nSh, dVol, b3Box, Release( pStmShell)) ;
@@ -3979,6 +4002,7 @@ SurfTriMesh::IsShellClosed( int nShell) const
       return false ;
   // ciclo sui triangoli della shell
    bool bClosed = true ;
+   int nTriaCnt = 0 ;
    for ( int i = 0 ; i < GetTriangleSize() ; ++ i) {
      // se triangolo non cancellato e della shell
       if ( m_vTria[i].nIdVert[0] != SVT_DEL  &&  m_vTria[i].nShell == nShell) {
@@ -3989,10 +4013,12 @@ SurfTriMesh::IsShellClosed( int nShell) const
             bClosed = false ;
             break ;  
          }
+         else
+            ++ nTriaCnt ;
       }
    }
   // restituisco il risultato
-   return bClosed ;
+   return ( bClosed  &&  nTriaCnt >= 4) ;
 }
 
 //----------------------------------------------------------------------------

SurfTriMesh.h

@@ -16,6 +16,7 @@
 #include "ObjGraphicsMgr.h"
 #include "DllMain.h"
 #include "GeoObjRW.h"
+#include "GeoConst.h"
 #include "/EgtDev/Include/EGkSurfTriMesh.h"
 #include "/EgtDev/Include/EGkHashGrids3d.h"
 #include "/EgtDev/Include/EGkPointGrid3d.h"
@@ -295,8 +296,8 @@ class SurfTriMesh : public ISurfTriMesh, public IGeoObjRW
       bool GetTriangleSmoothNormals( int nId, TriNormals3d& TNrms) const override ;
       SurfTriMesh* CloneTriangle( int nT) const override ;
       bool GetLoops( POLYLINEVECTOR& vPL) const override ;
-      bool GetSilhouette( const Vector3d& vtDir, double dTol, POLYLINEVECTOR& vPL, bool bAllTria = false) const override ;
-      bool GetSilhouette( const Plane3d& plPlane, double dTol, POLYLINEVECTOR& vPL, bool bAllTria = false) const override ;
+      bool GetSilhouette( const Vector3d& vtDir, double dTol, POLYLINEVECTOR& vPL, bool bAllTria = false, double dLinTol = LIN_TOL_STD) const override ;
+      bool GetSilhouette( const Plane3d& plPlane, double dTol, POLYLINEVECTOR& vPL, bool bAllTria = false, double dLinTol = LIN_TOL_STD) const override ;
       int  GetFacetCount( void) const override ;
       int  GetFacetSize( void) const override
               { return int( m_vFacet.size()) ; }

Trimming.cpp

@@ -3533,10 +3533,11 @@ IsBorderAButtonHole( const PolyLine& PL, double dLinTol, double dAngTol, Frame3d
 //-----------------------------------------------------------------------------
 static bool
 InterpolateSyncCurvesOnEndGuidePoints( const ICurveComposite* pGuide, const ICurveComposite* pOtherGuide,
-                                       const Plane3d& plStart, const Plane3d& plEnd, double dLinTol,
-                                       BIPNTVECTOR& vBiPts)
+                                       const Plane3d& plStart, const Plane3d& plEnd, const Vector3d vtAuxStart, const Vector3d vtAuxEnd,
+                                       double dLinTol, BIPNTVECTOR& vBiPts)
 {
    vBiPts.clear() ;
+   const double dLinAngTol = 15 * EPS_SMALL ; // tolleranza sulla lunghezza della corda dell'angolo di tolleranza
 
   // Verifico che le curve siano valide
    if ( pGuide == nullptr  ||  ! pGuide->IsValid()  ||
@@ -3566,52 +3567,134 @@ InterpolateSyncCurvesOnEndGuidePoints( const ICurveComposite* pGuide, const ICur
      // Interpolo le normali dei piani rispetto a tale valore
       Vector3d vtN = Media( plStart.GetVersN(), plEnd.GetVersN(), dInterPar) ;
       vtN.Normalize() ;
+      Vector3d vtAux = Media( vtAuxStart, vtAuxEnd, dInterPar) ; vtAux.Normalize() ;
      // Definisco il piano di intersezione
       Point3d ptCurr ;
       if ( ! pCrv->GetEndPoint( ptCurr))
          return false ;
+
+      // con i piani
       #if DEBUG_SYNC_INTERPOLATION
          Frame3d frPl ; frPl.Set( ptCurr, vtN) ;
          PtrOwner<IGeoFrame3d> frCurr( CreateGeoFrame3d()) ; frCurr->Set( frPl) ;
          VT.emplace_back( Release( frCurr)) ;
          VC.emplace_back( WHITE) ;
-         SaveGeoObj( VT, VC, "C:\\Temp\\SyncLinesPlanes.nge") ;
+         SaveGeoObj( VT, VC, "C:\\Temp\\trimming\\interpolate\\SyncLinesPlanes.nge") ;
       #endif
      // Recupero il parametro di intersezione tra la curva e il piano
-      #if 0
-         VT.clear() ; VC.clear() ;
-         PtrOwner<IGeoPoint3d> PT( CreateGeoPoint3d()) ; PT->Set( ptCurr) ;
-         VT.emplace_back( Release( PT)) ;
-         VC.emplace_back( AQUA) ;
-         PtrOwner<IGeoVector3d> VECT( CreateGeoVector3d()) ; VECT->Set( vtN) ;
-         VECT->ChangeBase( ptCurr) ;
-         PtrOwner<ICurveArc> pArc( CreateCurveArc()) ; pArc->Set( ptCurr, vtN, 1000.) ;
-         PtrOwner<ISurfFlatRegion> pSfrPlane( CreateSurfFlatRegion()) ;
-         pSfrPlane->AddExtLoop( Release( pArc)) ;
-         VT.emplace_back( Release( pSfrPlane)) ;
-         VC.emplace_back( Color( 0., 0., 0., .5)) ;
-         VT.emplace_back( Release( VECT)) ;
-         VC.emplace_back( BLUE) ;
-         VT.emplace_back( pOtherGuide->Clone()) ;
-         VC.emplace_back( WHITE) ;
-         SaveGeoObj( VT, VC, "C:\\Temp\\SyncLinesPlanes.nge") ;
-      #endif
-      IntersCurvePlane IntCP( *pOtherGuide, ptCurr, vtN) ;
-      if ( IntCP.GetIntersCount() == 0)
-         return false ; // ambiguità
-     // Recupero il punto della prima intersezione trovata
-      Point3d ptInt ;
-      double dPar ;
-      if ( ! IntCP.GetIntersPointNearTo( ptCurr, ptInt, dPar))
-         return false ;
       #if DEBUG_SYNC_INTERPOLATION
-         PtrOwner<IGeoPoint3d> ptG( CreateGeoPoint3d()) ; ptG->Set( ptInt) ;
-         VT.emplace_back( Release( ptG)) ;
-         VC.emplace_back( WHITE) ;
-         SaveGeoObj( VT, VC, "C:\\Temp\\SyncLinesPlanes.nge") ;
+         if ( false) {
+            VT.clear() ; VC.clear() ;
+            PtrOwner<IGeoPoint3d> PT( CreateGeoPoint3d()) ; PT->Set( ptCurr) ;
+            VT.emplace_back( Release( PT)) ;
+            VC.emplace_back( AQUA) ;
+            PtrOwner<IGeoVector3d> VECT( CreateGeoVector3d()) ; VECT->Set( vtN) ;
+            VECT->ChangeBase( ptCurr) ;
+            PtrOwner<ICurveArc> pArc( CreateCurveArc()) ; pArc->Set( ptCurr, vtN, 1000.) ;
+            PtrOwner<ISurfFlatRegion> pSfrPlane( CreateSurfFlatRegion()) ;
+            pSfrPlane->AddExtLoop( Release( pArc)) ;
+            VT.emplace_back( Release( pSfrPlane)) ;
+            VC.emplace_back( Color( 0., 0., 0., .5)) ;
+            VT.emplace_back( Release( VECT)) ;
+            VC.emplace_back( BLUE) ;
+            VT.emplace_back( pOtherGuide->Clone()) ;
+            VC.emplace_back( WHITE) ;
+            SaveGeoObj( VT, VC, "C:\\Temp\\trimming\\interpolate\\SyncLinesPlanes.nge") ;
+         }
       #endif
-     // Memorizzo tale punto
-      vBiPts.emplace_back( make_pair( ptCurr, ptInt)) ;
+
+      IntersCurvePlane IntCP( *pOtherGuide, ptCurr, vtN) ;
+      bool bFound = false ;
+      if ( IntCP.GetIntersCount() != 0) {
+        // Recupero il punto della prima intersezione trovata
+         Point3d ptIntClosest ;
+         double dPar ;
+         IntCP.GetIntersPointNearTo( ptCurr, ptIntClosest, dPar) ;
+         // verifico che sia allineato con la direzione che dovrebbe avere
+         Vector3d vtDir = ptIntClosest - ptCurr ;
+         vtDir.Normalize() ;
+         double dDiff = (vtDir - vtAux).Len() ;
+         if ( dDiff < dLinAngTol) {
+            #if DEBUG_SYNC_INTERPOLATION
+               PtrOwner<IGeoPoint3d> ptG( CreateGeoPoint3d()) ; ptG->Set( ptIntClosest) ;
+               VT.emplace_back( Release( ptG)) ;
+               VC.emplace_back( WHITE) ;
+               SaveGeoObj( VT, VC, "C:\\Temp\\trimming\\interpolate\\SyncLinesPlanes.nge") ;
+            #endif
+            //Memorizzo tale punto
+            vBiPts.emplace_back( make_pair( ptCurr, ptIntClosest)) ;
+            bFound = true ;
+         }
+         else if ( IntCP.GetIntersCount() > 1) {
+            double dMinDiff = INFINITO ;
+            Point3d ptBest ;
+            for ( int j = 0 ; j < IntCP.GetIntersCount() ; ++j) {
+               IntCrvPlnInfo icpi ; IntCP.GetIntCrvPlnInfo( j, icpi) ;
+               Point3d ptInt = icpi.Ici->ptI ;
+               double dDiff = ( ptInt - ptCurr).Len() ;
+               if ( dDiff < dMinDiff) {
+                  dMinDiff = dDiff ;
+                  ptBest = ptInt ;
+               }
+            }
+            if ( dMinDiff < dLinAngTol)
+               bFound = true ;
+         }
+      }
+
+      if ( ! bFound) {
+         // applico la direzione desiderata nel punto corrente della guida
+         // calcolo la lunghezza dell'isocurva in quella zona
+         Point3d ptS1, ptS2 ;
+         pGuide->GetStartPoint( ptS1) ;
+         pOtherGuide->GetStartPoint( ptS2);
+         double dDistRef = Dist( ptS1, ptS2) ;
+         double dParamOther = -1. ;
+         int nFlag = -1 ;
+         Point3d ptEnd = ptCurr + (vtAux * dDistRef) ;
+         if ( ! DistPointCurve( ptEnd, *pOtherGuide).GetParamAtMinDistPoint( 0, dParamOther, nFlag))
+            return false ;
+
+         // nell'intorno del più vicino, cerco l'isocurva più vicina alla direzione desiderata
+         Point3d ptBest ;
+         double dMinDiff = INFINITO ;
+         double dSearchLen = 3. ;
+         double dStepLen = 0.1 ;
+         double dCurrLenOther ; pOtherGuide->GetLengthAtParam( dParamOther, dCurrLenOther) ;
+         double dLenOther ; pOtherGuide->GetLength( dLenOther) ;
+         dCurrLenOther -= dSearchLen ;
+         dCurrLenOther = Clamp( dCurrLenOther, 0., dLenOther) ;
+         for ( int j = 0 ; j < 2 * dSearchLen / dStepLen ; ++j) {
+            dCurrLenOther += j * dStepLen ;
+            if ( dCurrLenOther > dLenOther)
+               break ;
+            double dCurrParOther = 0 ; pOtherGuide->GetParamAtLength( dCurrLenOther, dCurrParOther) ;
+            Point3d ptCurrOther ; pOtherGuide->GetPointD1D2( dCurrParOther, ICurve::FROM_MINUS, ptCurrOther) ;
+            Vector3d vtDir = ptCurrOther - ptCurr ; vtDir.Normalize() ;
+            double dDiff = ( vtDir - vtAux).Len() ;
+            if ( dDiff < dMinDiff) {
+               dMinDiff = dDiff ; 
+               ptBest = ptCurrOther ;
+            }
+            #if DEBUG_SYNC_INTERPOLATION
+               VT.clear() ;
+               VC.clear() ;
+               VT.emplace_back( pGuide->Clone()) ;
+               VC.emplace_back( BLUE) ;
+               VT.emplace_back( pOtherGuide->Clone()) ;
+               VC.emplace_back( BLUE) ;
+               PtrOwner<IGeoVector3d> vtFirst( CreateGeoVector3d()) ; vtFirst->Set( -vtN * 12, ptCurrOther) ;
+               VT.emplace_back( Release( vtFirst)) ;
+               VC.emplace_back( AQUA) ;
+               PtrOwner<IGeoVector3d> vtCurr( CreateGeoVector3d()) ; vtCurr->Set( -vtDir * 12, ptCurrOther) ;
+               VT.emplace_back( Release( vtCurr)) ;
+               VC.emplace_back( WHITE) ;
+               SaveGeoObj( VT, VC, "C:\\Temp\\trimming\\interpolate\\SyncLinesPlanes.nge") ;
+            #endif
+         }
+         if ( dMinDiff < 2 * dLinAngTol)
+            vBiPts.emplace_back( make_pair( ptCurr, ptBest)) ;
+      }
    }
 
    return true ;
@@ -4066,18 +4149,18 @@ GetTrimmingSyncInterpolation( const ICurve* pCrvEdge1, const ICurve* pCrvEdge2,
    Vector3d vtStart1, vtStart2 ;
    if ( ! pCompoGuide1->GetStartDir( vtStart1)  ||  ! pCompoGuide2->GetStartDir( vtStart2))
       return false ;
-   Vector3d vtAux = ptE1 - ptS1 ; vtAux.Normalize() ;
+   Vector3d vtAuxStart = ptE1 - ptS1 ; vtAuxStart.Normalize() ;
    Vector3d vtMTan = Media( vtStart1, vtStart2) ; vtMTan.Normalize() ;
-   Vector3d vtN = OrthoCompo( vtMTan, vtAux) ; vtN.Normalize() ;
+   Vector3d vtN = OrthoCompo( vtMTan, vtAuxStart) ; vtN.Normalize() ;
    Plane3d plStart ;
    if ( ! plStart.Set( ptS1, vtN))
       return false ;
    Vector3d vtEnd1, vtEnd2 ;
    if ( ! pCompoGuide1->GetEndDir( vtEnd1)  ||  ! pCompoGuide2->GetEndDir( vtEnd2))
       return false ;
-   vtAux = ptE2 - ptS2 ; vtAux.Normalize() ;
+   Vector3d vtAuxEnd = ptE2 - ptS2 ; vtAuxEnd.Normalize() ;
    vtMTan = Media( vtEnd1, vtEnd2) ; vtMTan.Normalize() ;
-   vtN = OrthoCompo( vtMTan, vtAux) ; vtN.Normalize() ;
+   vtN = OrthoCompo( vtMTan, vtAuxEnd) ; vtN.Normalize() ;
    Plane3d plEnd ;
    if ( ! plEnd.Set( ptS2, vtN))
       return false ;
@@ -4096,13 +4179,15 @@ GetTrimmingSyncInterpolation( const ICurve* pCrvEdge1, const ICurve* pCrvEdge2,
 
   // Curve di Sincronizzazione del Bordo 1 sul Bordo 2
    BIPNTVECTOR vBiPts1 ;
-   if ( ! InterpolateSyncCurvesOnEndGuidePoints( pCompoGuide1, pCompoGuide2, plStart, plEnd, dMyLinTol, vBiPts1))
+   if ( ! InterpolateSyncCurvesOnEndGuidePoints( pCompoGuide1, pCompoGuide2, plStart, plEnd, vtAuxStart, vtAuxEnd, dMyLinTol, vBiPts1))
       return false ;
 
+   vtAuxStart *= -1 ;
+   vtAuxEnd *= -1 ;
   // Curve di Sincronizzazione del Bordo 2 sul Bordo 1
    BIPNTVECTOR vBiPts2 ;
-   if ( ! InterpolateSyncCurvesOnEndGuidePoints( pCompoGuide2, pCompoGuide1, plStart, plEnd, dMyLinTol, vBiPts2))
-      return false ;
+   //if ( ! InterpolateSyncCurvesOnEndGuidePoints( pCompoGuide2, pCompoGuide1, plStart, plEnd, vtAuxStart, vtAuxEnd, dMyLinTol, vBiPts2))
+   //   return false ;
 
   // Restituisco le Curve di Sincronizzazione
   // [Da Bordo 1 a Bordo 2 originale]

VolZmap.h

@@ -37,6 +37,19 @@ struct AppliedVector {
    int nPropIndex ;
 } ;
 
+struct IntersToCheck {
+   Point3d ptInters ;
+   Vector3d vtN ;
+   double dU ;
+   int nG ;
+   int nI ;
+   int nJ ;
+   IntersToCheck( const Point3d& _ptI, const Vector3d& _vtN, double _dU, int _nG, int _nI, int _nJ) :
+      ptInters( _ptI), vtN( _vtN), dU( _dU), nG( _nG), nI( _nI), nJ( _nJ) { ;}
+};
+
+typedef std::vector<IntersToCheck> INTTOCHECKVEC ;
+
 //----------------------------------------------------------------------------
 class VolZmap : public IVolZmap, public IGeoObjRW
 {
@@ -84,7 +97,7 @@ class VolZmap : public IVolZmap, public IGeoObjRW
       bool Create( const Point3d& ptO, double dDimX, double dDimY, double dDimZ, double dStep, bool bTriDex, int* nError = nullptr) override ;
       bool CreateEmpty( const Point3d& ptO, double dDimX, double dDimY, double dDimZ, double dStep, bool bTriDex, int* nError = nullptr) override ;
       bool CreateFromFlatRegion( const ISurfFlatRegion& Surf, double dDimZ, double dStep, bool bTriDex, int* nError = nullptr) override ;
-      bool CreateFromTriMesh( const ISurfTriMesh& Surf, double dStep, bool bTriDex, double dExtraBox = 0, int* nError = nullptr) override ;
+      bool CreateFromTriMesh( const ISurfTriMesh& Surf, double dStep, bool bTriDex, double dExtraBox = 0, int* nError = nullptr, bool bForceClosed = false) override ;
       int  GetBlockCount( void) const override ;
       int  GetBlockUpdatingCounter( int nBlock) const override ;
       bool GetBlockTriangles( int nBlock, TRIA3DEXVECTOR& vTria) const override ;
@@ -393,9 +406,6 @@ class VolZmap : public IVolZmap, public IGeoObjRW
                            double& dU1, double& dU2) const ;
       bool GetDepthWithDexel( const Point3d& ptP, const Vector3d& vtDir, double& dInLength, double& dOutLength) const ;
       bool GetDepthWithVoxel( const Point3d& ptP, const Vector3d& vtDir, double& dInLength, double& dOutLength) const ;
-      bool IntersLineCylinder( const Point3d& ptLineSt, const Vector3d& vtLineDir,
-                               const Frame3d& CylFrame, double dH, double dRad, bool bTapLow, bool bTapUp,
-                               Point3d& ptInt1, Vector3d& vtN1, Point3d& ptInt2, Vector3d& vtN2) const ;
       bool IntersLineEllipticalCylinder( const Point3d& ptLineSt, const Vector3d& vtLineDir,
                                          const Frame3d& CircFrame, double dRad, double dLongMvLen, double dOrtMvLen,
                                          bool bTapLow, bool bTapUp,
@@ -466,11 +476,14 @@ class VolZmap : public IVolZmap, public IGeoObjRW
       bool CDeSimpleTorus( const Frame3d& frTorus, double dMaxRad, double dMinRad, bool bPrecise = false) const ;
       // Funzione per crezione solido in parallelo
       bool CreateMapPart( int nMap, int nInfI, int nSupI, int nInfJ, int nSupJ, const Vector3d& vtLen, const Point3d& ptMapOrig,
-                          const ISurfTriMesh& Surf, IntersParLinesSurfTm& intPLSTM) ;
+                          const ISurfTriMesh& Surf, IntersParLinesSurfTm& intPLSTM, bool bForceClosed) ;
       bool AddMapPart( int nMap, int nInfI, int nSupI, int nInfJ, int nSupJ, const Vector3d& vtLen, const Point3d& ptMapOrig,
                        const ISurfTriMesh& Surf, IntersParLinesSurfTm& intPLSTM) ;
       bool SubtractMapPart( int nMap, int nInfI, int nSupI, int nInfJ, int nSupJ, const Vector3d& vtLen, const Point3d& ptMapOrig,
                             const ISurfTriMesh& Surf, IntersParLinesSurfTm& intPLSTM) ;
+      bool AdjustDexelThroughCracks( int nG, const Vector3d& vtLen, const INTTOCHECKVEC& vIntToCheck, const Point3d& ptMapOrig,
+                                     const ISurfTriMesh& Surf, const IntersParLinesSurfTm& intPLSTM) ;
+      DBLDBLVECTOR GetNeighbours( int nG, int nI, int nJ, double dPar) ;
      // Funzioni per Offset di superfici
       bool InitVolZMapOffset( const CISURFTMPVECTOR& vSurf, double dOffs, double dTol) ;
       bool InitVolZMapThickeningOffset( const CISURFTMPVECTOR& vSurf, double dOffs, double dTol) ;

VolZmapCalculus.cpp

@@ -2071,127 +2071,6 @@ VolZmap::CDeSurfTm( const ISurfTriMesh& tmSurf, double dSafeDist, bool bPrecise)
    return false ;
 }
 
-//----------------------------------------------------------------------------
-// Riferimento con origine nel centro della base e asse di simmetria coincidente con l'asse Z.
-// La funzione restituisce true in caso di intersezione, false altrimenti.
-//----------------------------------------------------------------------------
-bool
-VolZmap::IntersLineCylinder( const Point3d& ptLineSt, const Vector3d& vtLineDir,
-                             const Frame3d& CylFrame, double dH, double dRad, bool bTapLow, bool bTapUp,
-                             Point3d& ptInt1, Vector3d& vtN1, Point3d& ptInt2, Vector3d& vtN2) const
-{
-  // Porto la linea nel riferimento del cilindro
-   Point3d ptP = GetToLoc( ptLineSt, CylFrame) ;
-   Vector3d vtV = GetToLoc( vtLineDir, CylFrame) ;
-
-  // Determino le eventuali intersezioni con le due basi a quota minima e massima (solo se linea non parallela ad esse)
-   int nBasInt = 0 ;
-   if ( abs( vtV.z) > EPS_ZERO) {
-      // le linee tangenti al cilindro non sono considerate intersecanti
-      double dEpsRad = ( vtV.IsZeroXY() ? - EPS_SMALL : EPS_SMALL) ;
-      ptInt1 = ptP + ( ( 0 - ptP.z) / vtV.z) * vtV ;
-      if ( ptInt1.x * ptInt1.x + ptInt1.y * ptInt1.y < dRad * dRad + 2 * dRad * dEpsRad) {
-         nBasInt += 1 ;
-         vtN1 = Z_AX ;
-      }
-      ptInt2 = ptP + ( ( dH - ptP.z) / vtV.z) * vtV ;  
-      if ( ptInt2.x * ptInt2.x + ptInt2.y * ptInt2.y < dRad * dRad + 2 * dRad * dEpsRad) {
-         nBasInt += 2 ;
-         vtN2 = - Z_AX ;
-      }
-   }
-
-  // Se la linea interseca entrambe le basi, si sono trovate le due intersezioni
-   if ( nBasInt == 3) {
-     // Porto i punti e i versori nel riferimento globale
-      ptInt1.ToGlob( CylFrame) ;
-      vtN1.ToGlob( CylFrame) ;
-      ptInt2.ToGlob( CylFrame) ;
-      vtN2.ToGlob( CylFrame) ;
-     // Trovate intersezioni
-      return true ;
-   }
-   
-  // Determino le intersezioni con la superficie laterale del cilindro
-   DBLVECTOR vdCoeff{ ptP.x * ptP.x + ptP.y * ptP.y - dRad * dRad,
-                      2 * ( ptP.x * vtV.x + ptP.y * vtV.y),
-                      vtV.x * vtV.x + vtV.y * vtV.y} ;
-   DBLVECTOR vdRoots ;
-   int nRoot = PolynomialRoots( 2, vdCoeff, vdRoots) ;
-
-  // Epsilon per piani di tappo
-   double dEpsLow = ( bTapLow ? - EPS_SMALL : EPS_SMALL) ;
-   double dEpsUp = ( bTapUp ? EPS_SMALL : - EPS_SMALL) ;
-
-  // Elimino le soluzioni cha danno intersezioni fuori dai limiti in Z del cilindro
-   if ( nRoot == 2) {
-      double dIntZ2 = ptP.z + vdRoots[1] * vtV.z ;
-      if ( dIntZ2 < 0 + dEpsLow  ||  dIntZ2 > dH + dEpsUp)
-         -- nRoot ;
-   }
-   if ( nRoot >= 1) {
-      double dIntZ1 = ptP.z + vdRoots[0] * vtV.z ;
-      if ( dIntZ1 < 0 + dEpsLow  ||  dIntZ1 > dH + dEpsUp) {
-         if ( nRoot == 2)
-            vdRoots[0] = vdRoots[1] ;
-         -- nRoot ;
-      }
-   }
-
-  // Due soluzioni: la retta interseca due volte la superficie laterale
-   if ( nRoot == 2) {
-     // Punti di intersezione con la superficie del cilindro
-      ptInt1 = ptP + vdRoots[0] * vtV ;
-      ptInt2 = ptP + vdRoots[1] * vtV ;
-     // Determino le normali
-      vtN1.Set( -ptInt1.x, -ptInt1.y, 0) ;
-      vtN1.Normalize() ;
-      vtN2.Set( -ptInt2.x, -ptInt2.y, 0) ;
-      vtN2.Normalize() ;
-     // Porto i punti e i versori nel riferimento globale
-      ptInt1.ToGlob( CylFrame) ;
-      vtN1.ToGlob( CylFrame) ;
-      ptInt2.ToGlob( CylFrame) ;
-      vtN2.ToGlob( CylFrame) ;
-     // Trovate intersezioni
-      return true ;
-   }
-   
-  // Una soluzione : la retta interseca la superficie laterale e un piano
-   else if ( nRoot == 1) {
-     // Se piano superiore
-      if ( nBasInt == 2) {
-        // Punto di intersezione
-         ptInt1 = ptP + vdRoots[0] * vtV ;
-        // Normale alla superficie del cilindro verso l'interno
-         vtN1.Set( -ptInt1.x, -ptInt1.y, 0) ;
-         vtN1.Normalize() ;
-      }
-     // altrimenti piano inferiore
-      else if ( nBasInt == 1) {
-        // Punto di intersezione
-         ptInt2 = ptP + vdRoots[0] * vtV ;
-        // Normale alla superficie del cilindro verso l'interno
-         vtN2.Set( -ptInt2.x, -ptInt2.y, 0) ;
-         vtN2.Normalize() ;
-      }
-     // altrimenti niente
-      else
-         return false ;
-     // Porto i punti e i versori nel riferimento globale
-      ptInt1.ToGlob( CylFrame) ;
-      vtN1.ToGlob( CylFrame) ;
-      ptInt2.ToGlob( CylFrame) ;
-      vtN2.ToGlob( CylFrame) ;
-     // Trovate intersezioni
-      return true ;
-   }
-
-  // Nessuna soluzione : nessuna intersezione 
-   else
-      return false ;
-}
-
 //----------------------------------------------------------------------------
 // Riferimento con origine nel vertice del cono e asse di simmetria coincidente con l'asse Z.
 // La funzione restituisce true in caso di intersezione, false altrimenti.

VolZmapCreation.cpp

@@ -19,6 +19,7 @@
 #include "GeoConst.h"
 #include "/EgtDev/Include/EGkStmFromCurves.h"
 #include "/EgtDev/Include/EGkIntersLineSurfTm.h"
+#include "/EgtDev/Include/EGkIntersLinePlane.h"
 #include "/EgtDev/Include/EgtNumUtils.h"
 #include <future>
 
@@ -542,7 +543,7 @@ VolZmap::CreateFromFlatRegion( const ISurfFlatRegion& Surf, double dDimZ, double
 //----------------------------------------------------------------------------
 bool
 VolZmap::CreateMapPart( int nMap, int nInfI, int nSupI, int nInfJ, int nSupJ, const Vector3d& vtLen, const Point3d& ptMapOrig,
-                        const ISurfTriMesh& Surf, IntersParLinesSurfTm& intPLSTM)
+                        const ISurfTriMesh& Surf, IntersParLinesSurfTm& intPLSTM, bool bForceClosed)
 {
    if ( nMap < 0  ||  nMap > 2  ||
         nInfI < 0  ||  nInfI > m_nNx[nMap]  ||
@@ -553,6 +554,8 @@ VolZmap::CreateMapPart( int nMap, int nInfI, int nSupI, int nInfJ, int nSupJ, co
 
    double dCosSmall = sin( EPS_ANG_SMALL * DEGTORAD) ;
 
+   INTTOCHECKVEC vIntToCheck ;
+
    // Determinazione e ridimensionamento dei dexel interni alla trimesh
    for ( int i = nInfI ; i < nSupI ; ++ i) {
       for ( int j = nInfJ ; j < nSupJ ; ++ j) {
@@ -584,6 +587,14 @@ VolZmap::CreateMapPart( int nMap, int nInfI, int nSupI, int nInfJ, int nSupJ, co
 
          int nInt = int( IntersectionResults.size()) ;
 
+         if ( nInt == 1) {
+            int nT = IntersectionResults[0].nT ;
+            int nF = Surf.GetFacetFromTria( nT) ;
+            Vector3d vtN ; Surf.GetFacetNormal( nF, vtN) ;
+            vIntToCheck.emplace_back( IntersectionResults[0].ptI, vtN, IntersectionResults[0].dU, nMap, i, j) ;
+            continue ;
+         }
+
          int nPos = j * m_nNx[nMap] + i ;
 
          bool bInside = false ;
@@ -592,6 +603,14 @@ VolZmap::CreateMapPart( int nMap, int nInfI, int nSupI, int nInfJ, int nSupJ, co
 
          for ( int k = 0 ; k < nInt ; ++ k) {
 
+            if ( k > 0) {
+               int z = k - 1 ;
+               // controllo se l'intersezione corrente è coincidente con la precedente, per esempio se ILTT == 4 ( intersezione su un lato di un triangolo, quindi con 2 triangoli)
+               if ( IntersectionResults[k].dU - IntersectionResults[z].dU < EPS_SMALL  &&
+                  IntersectionResults[k].dCosDN - IntersectionResults[z].dCosDN < EPS_SMALL)
+                  continue ;
+            }
+
             int nIntType = IntersectionResults[k].nILTT ;
 
             // Se c'è intersezione
@@ -601,7 +620,12 @@ VolZmap::CreateMapPart( int nMap, int nInfI, int nSupI, int nInfJ, int nSupJ, co
 
                // entro nella superficie trimesh
                if ( dCos < - dCosSmall) {
-
+                  if ( bInside) {
+                     // salvo la precedente, perché vuol dire che manca la sua uscita
+                     // poi procedo con l'intersezione corrente
+                     int z = k - 1 ;
+                     vIntToCheck.emplace_back( IntersectionResults[z].ptI, vtInN, IntersectionResults[z].dU, nMap, i, j) ;
+                  }
                   ptIn = IntersectionResults[k].ptI ;
 
                   int nT = IntersectionResults[k].nT ;
@@ -613,8 +637,7 @@ VolZmap::CreateMapPart( int nMap, int nInfI, int nSupI, int nInfJ, int nSupJ, co
                }
 
                // esco dalla superficie trimesh
-               else if ( dCos > dCosSmall  &&  bInside) {
-
+               else if ( dCos > dCosSmall) {
                   Point3d ptOut = IntersectionResults[k].ptI ;
 
                   int nT = IntersectionResults[k].nT ;
@@ -623,6 +646,13 @@ VolZmap::CreateMapPart( int nMap, int nInfI, int nSupI, int nInfJ, int nSupJ, co
                   Vector3d vtOutN ;
                   Surf.GetFacetNormal( nF, vtOutN) ; 
 
+                  if ( ! bInside) {
+                     // se l'intersezione è uscente, ma non ho un'entrata allora devo salvare l'intersezione corrente, perché è andata persa la sua entrata
+                     // procedo poi con la prossima intersezione
+                     vIntToCheck.emplace_back( IntersectionResults[k].ptI, vtOutN, IntersectionResults[k].dU, nMap, i, j) ;
+                     continue ;
+                  }
+
                   int nCurrentSize = int( m_Values[nMap][nPos].size()) ;
 
                   // Aggiungo un tratto al dexel
@@ -643,6 +673,12 @@ VolZmap::CreateMapPart( int nMap, int nInfI, int nSupI, int nInfJ, int nSupJ, co
          }
       }
    }
+
+   if ( bForceClosed) {
+      if ( ! AdjustDexelThroughCracks( nMap, vtLen, vIntToCheck, ptMapOrig, Surf, intPLSTM))
+         return false ;
+   }
+
    return true ;
 }
 
@@ -834,11 +870,14 @@ VolZmap::SubtractMapPart( int nMap, int nInfI, int nSupI, int nInfJ, int nSupJ,
 
 //----------------------------------------------------------------------------
 bool
-VolZmap::CreateFromTriMesh( const ISurfTriMesh& Surf, double dStep, bool bTriDex, double dExtraBox, int* nError)
+VolZmap::CreateFromTriMesh( const ISurfTriMesh& Surf, double dStep, bool bTriDex, double dExtraBox, int* nError, bool bForceClosed)
 {
   // Se la superficie non è chiusa oppure orientata al contrario non ha senso continuare
    double dVol ;
-   if ( ! Surf.IsClosed()  ||  ! Surf.GetVolume( dVol)  ||  dVol < 0)
+   if ( ( ! Surf.IsClosed()  ||  ! Surf.GetVolume( dVol)  ||  dVol < 0)  &&  ! bForceClosed)
+      return false ;
+
+   if ( bForceClosed  && ! bTriDex)
       return false ;
 
   // Assegno la dimensione della mappa 1 o 3
@@ -940,7 +979,7 @@ VolZmap::CreateFromTriMesh( const ISurfTriMesh& Surf, double dStep, bool bTriDex
       IntersParLinesSurfTm intPLSTM( frMapFrame, Surf) ;
 
      // Standarda è multithread
-      constexpr bool MULTITHREAD = true ;
+      constexpr bool MULTITHREAD = false ;
       if ( MULTITHREAD) {
 
          // Numero massimo di thread
@@ -956,7 +995,7 @@ VolZmap::CreateFromTriMesh( const ISurfTriMesh& Surf, double dStep, bool bTriDex
                nInfI = nSupI ;
                nSupI = nInfI + ( nThread < nRemainder ? nDexNum + 1 : nDexNum) ;
                vRes[nThread] = async( launch::async, &VolZmap::CreateMapPart, this, nG,
-                                      nInfI, nSupI, 0, m_nNy[nG], ref( vtLen), ref( ptMapOrig), ref( Surf), ref( intPLSTM)) ;
+                                      nInfI, nSupI, 0, m_nNy[nG], ref( vtLen), ref( ptMapOrig), ref( Surf), ref( intPLSTM), bForceClosed) ;
             }
          }
          else {
@@ -968,7 +1007,7 @@ VolZmap::CreateFromTriMesh( const ISurfTriMesh& Surf, double dStep, bool bTriDex
                nInfJ = nSupJ ;
                nSupJ = nInfJ + ( nThread < nRemainder ? nDexNum + 1 : nDexNum) ;
                vRes[nThread] = async( launch::async, &VolZmap::CreateMapPart, this, nG,
-                                      0, m_nNx[nG], nInfJ, nSupJ, ref( vtLen), ref( ptMapOrig), ref( Surf),ref( intPLSTM)) ;
+                                      0, m_nNx[nG], nInfJ, nSupJ, ref( vtLen), ref( ptMapOrig), ref( Surf),ref( intPLSTM), bForceClosed) ;
             }
          }
        
@@ -987,7 +1026,7 @@ VolZmap::CreateFromTriMesh( const ISurfTriMesh& Surf, double dStep, bool bTriDex
 
      // !!!! NON MULTITHREAD : SOLO PER DEBUG !!!!
       else {
-         CreateMapPart( nG, 0, m_nNx[nG], 0, m_nNy[nG], vtLen, ptMapOrig, Surf, intPLSTM) ;
+         CreateMapPart( nG, 0, m_nNx[nG], 0, m_nNy[nG], vtLen, ptMapOrig, Surf, intPLSTM, bForceClosed) ;
       }
    }
 
@@ -1008,3 +1047,315 @@ VolZmap::CreateFromTriMesh( const ISurfTriMesh& Surf, double dStep, bool bTriDex
 
    return bCompleted ;
 }
+
+DBLDBLVECTOR
+VolZmap::GetNeighbours( int nG, int nI, int nJ, double dPar)
+{
+   DBLDBLVECTOR vNeigh ;
+   // parto da in basso a sinistra e procedo per righe, saltando il punto corrente
+   if ( nI > 0 && nJ > 0)
+      vNeigh.emplace_back( nI - dPar, nJ - dPar) ;
+   if ( nJ > 0) {
+      vNeigh.emplace_back( nI, nJ - dPar) ;
+      if ( nI < m_nNx[nG] - dPar)
+         vNeigh.emplace_back( nI + dPar, nJ - dPar) ;
+   }
+   // passo alla fila contenente il punto corrente
+   if ( nI > 0)
+      vNeigh.emplace_back( nI - dPar, nJ) ;
+   if ( nI < m_nNx[nG] - dPar)
+      vNeigh.emplace_back( nI + dPar, nJ) ;
+   // passo alla fila successiva a quella del corrente
+   if ( nJ < m_nNy[nG] - dPar) {
+      if ( nI > 0)
+         vNeigh.emplace_back( nI - dPar, nJ + dPar) ;
+      vNeigh.emplace_back( nI, nJ + dPar) ;
+      if ( nI < m_nNx[nG])
+         vNeigh.emplace_back( nI + dPar, nJ + dPar) ;
+   }
+   return vNeigh ;
+}
+
+//----------------------------------------------------------------------------
+bool
+VolZmap::AdjustDexelThroughCracks( int nG, const Vector3d& vtLen, const INTTOCHECKVEC& vIntToCheck, const Point3d& ptMapOrig,
+                                   const ISurfTriMesh& Surf, const IntersParLinesSurfTm& intPLSTM)
+{
+   double dAngSameFace = 45 ;
+   double dCosSmall = sin( EPS_ANG_SMALL * DEGTORAD) ;
+   // per ogni intersezione segnalata devo cercare sugli spilloni vicini l'intervallo con l'estremo più vicino a questa intersezione
+   // e usare l'altro estremo, insieme a quello degli altri spilloni vicini, per estrapolare quello mancante sullo spillone corrente
+   Vector3d vtAx ;
+   if ( nG == 0)
+      vtAx = Z_AX ;
+   else if ( nG == 1)
+      vtAx = X_AX ;
+   else if ( nG == 2)
+      vtAx = Y_AX ;
+   for ( const auto& itc : vIntToCheck) {
+      int nPos = itc.nJ * m_nNx[nG] + itc.nI ;
+      double dPosRef = itc.ptInters.v[( nG + 2) % 3] ;
+      // controllo se esiste già un intervallo con un estremo quasi coincidente a quello segnalato
+      // ed entrambi sono entrate o uscite
+      bool bNeedToReconstruct = true ;
+      for ( const auto& data: m_Values[nG][nPos]) {
+         if ( (( abs( dPosRef - data.dMin) < 10 * EPS_SMALL  &&  ( itc.vtN * vtAx) * ( data.vtMinN * vtAx) > 0))  ||
+               (( abs( dPosRef - data.dMax) < 10 * EPS_SMALL  &&  ( itc.vtN * vtAx) * ( data.vtMaxN * vtAx) > 0))) {
+            bNeedToReconstruct = false ;
+            break ;
+         }  
+      }
+      if ( ! bNeedToReconstruct)
+         continue ;
+      DBLDBLVECTOR vNeigh = GetNeighbours( nG, itc.nI, itc.nJ, m_dStep) ;
+      PNTVECTOR vNeighInters ;
+      Vector3d vtMeanN = V_NULL ;
+      bool bSearchingInOrOut = itc.vtN * vtAx > 0 ;
+      bool bUseNeighInfo = true ;
+      for ( const auto& [i,j] : vNeigh) {
+         double dMinDist = INFINITO ;
+         double dCorrespInters = INFINITO ;
+         double dNearestPos = NAN ;
+         Vector3d vtNearestN ;
+         int nNeighPos = int( j) * m_nNx[nG] + int( i) ;
+         for ( const auto& data: m_Values[nG][nNeighPos]) {
+            double dDist1 = abs( dPosRef - data.dMin) ;
+            double dDist2 = abs( dPosRef - data.dMax) ;
+            if ( dDist1 < dMinDist  ||  dDist2 < dMinDist) {
+               dMinDist = min( dDist1, dDist2) ;
+                  
+               // se sto cercando un ingresso
+               if ( bSearchingInOrOut) {
+                  if ( data.vtMaxN * vtAx < 0) {
+                     dNearestPos = data.dMax ;
+                     vtNearestN = data.vtMaxN ;
+                     dCorrespInters = data.dMin ;
+                  }
+                  else if ( data.vtMinN * vtAx < 0) {
+                     dNearestPos = data.dMin ;
+                     vtNearestN = data.vtMinN ;
+                     dCorrespInters = data.dMax ;
+                  }
+               }
+               // se sto cercando un'uscita
+               else {
+                  if ( data.vtMaxN * vtAx > 0) {
+                     dNearestPos = data.dMax ;
+                     vtNearestN = data.vtMaxN ;
+                     dCorrespInters = data.dMin ;
+                  }
+                  else if ( data.vtMinN * vtAx > 0) {
+                     dNearestPos = data.dMin ;
+                     vtNearestN = data.vtMinN ;
+                     dCorrespInters = data.dMax ;
+                  }
+               }
+            }
+         }
+         // verifico che il dNearestPos sia effettivamente associato al tratto che sto cercando di ricostruire
+         // e non ad un altro presente sullo spillone corrente
+         bool bAddNearest = true ;
+         for ( const auto& data: m_Values[nG][nPos]) {
+            double dDist1 = abs( dCorrespInters - data.dMin) ;
+            double dDist2 = abs( dCorrespInters - data.dMax) ;
+            if ( dDist1 < dMinDist  ||  dDist2 < dMinDist) {
+               bAddNearest = false ;
+               break ;
+            }
+         }
+
+         if ( bAddNearest  &&  isfinite( dNearestPos)) {
+            // controllo anche che i punti non siano troppo lontani tra loro, altrimenti
+            // il piano calcolato potrebbe essere una media troppo grezza
+            double dMaxDist = 3 * m_dStep ;
+            const bool bTooFar = any_of( vNeighInters.begin(), vNeighInters.end(),
+                                         [ dNearestPos, dMaxDist]( const Point3d& pt) {
+                                            return abs( pt.z - dNearestPos) > dMaxDist ;
+                                         }) ;
+            double dAng ;
+            if ( ! bTooFar) {
+               // controllo anche che gli angoli delle normali non cambino troppo
+               // calcolo l'angolo con la media delle precedenti perché il valore oltre cui
+               // considero le normali diverse è grande
+               vtNearestN.GetAngle( vtMeanN, dAng) ;
+            }
+            bAddNearest = ! bTooFar  &&  dAng < dAngSameFace ;
+            if ( bAddNearest) {
+               double dX = ( i + 0.5) * m_dStep ;
+               double dY = ( j + 0.5) * m_dStep ;
+               vNeighInters.emplace_back( dX, dY, dNearestPos) ;
+               vtMeanN += vtNearestN ;
+            }
+            else {
+               bUseNeighInfo = false ;
+               break ;
+            }
+         }
+      }
+      Point3d ptInt ;
+      // se riesco uso i vicini per calcolare l'intersezione mancante
+      if ( bUseNeighInfo) {
+         // se non ci sono almeno tre punti, non allineati, non riesco a determinare il piano con cui tagliare lo spillone
+         if ( ssize( vNeighInters) < 3)
+            continue ;
+         else if ( ssize( vNeighInters) == 3){
+            // verifico che non siano allineati
+            if ( ( vNeighInters[0].x == vNeighInters[1].x  &&  vNeighInters[0].x ==  vNeighInters[1].x)  ||
+                  ( vNeighInters[0].y == vNeighInters[1].y  &&  vNeighInters[0].y ==  vNeighInters[1].y))
+               continue ;
+         }
+         // se sono più di tre sicuramente non sono allieanti, visto che sono intorno allo spillone corrente
+         vtMeanN.Normalize() ;
+         Plane3d plLoc ;
+         PolyLine PL ; PL.FromPointVector( vNeighInters) ;
+         PL.IsFlat( plLoc, INFINITO) ;
+            
+         // porto anche il punto dell'intersezione nel frame della griglia
+         Point3d ptKnown = itc.ptInters ;
+         Frame3d frGrid ;
+         if ( nG == 0)
+            frGrid.Set( ORIG, Frame3d::TOP) ;
+         else if ( nG == 1)
+            frGrid.Set( ORIG, Frame3d::RIGHT) ;
+         else if ( nG == 2)
+            frGrid.Set( ORIG, Z_AX, X_AX, Y_AX) ;
+         ptKnown.ToLoc( frGrid) ;
+         IntersLinePlane( ptKnown, Z_AX, INFINITO, plLoc, ptInt, false) ;
+      }
+      // altrimenti sposto di poco lo spillone e ricalcolo le intersezioni con la superficie, finché trovo l'intersezione mancante
+      else {
+         bool bFound = false ;
+         DBLVECTOR vSmallStep ;
+         vSmallStep.push_back( Clamp( 0.05 * m_dStep, 50 * EPS_SMALL, 1.)) ;
+         vSmallStep.push_back( Clamp( 0.2 * m_dStep, 50 * EPS_SMALL, 1.)) ;
+         // ciclo una raggiera di spilloni ( a distanza inferiore allo m_dStep) attorno allo spillone
+         // appena trova un'intersezione buona mi fermo
+         // se ciclando la raggiera non trovo un'intersezione valida allora potrei essermi spostato troppo poco dallo spillone originale e essere caduto ancora nella fessura
+         // quindi ciclo nuovamente aumentando un poco la distanza dallo spillone originale ( comunque sempre meno della distanza m_dStep)
+         for ( int c = 0 ; c < ssize( vSmallStep) ; ++c) {
+            DBLDBLVECTOR vSmallMoveNeigh = GetNeighbours( nG, itc.nI, itc.nJ, vSmallStep[c]) ;
+            for ( int n = 0 ; n < ssize( vSmallMoveNeigh) ; ++n) {
+               double dX = ( vSmallMoveNeigh[n].first + 0.5) * m_dStep ;
+               double dY = ( vSmallMoveNeigh[n].second + 0.5) * m_dStep ;
+               Point3d ptP0( dX, dY, 0) ;
+               ILSIVECTOR IntersectionResults ;
+               intPLSTM.GetInters( ptP0, vtLen.v[(nG+2)%3], IntersectionResults) ;
+               // intervalli dalle intersezioni
+               vector<Data> vNewIntervals ;
+               bool bInside = false ;
+               Vector3d vtInN ;
+               Point3d ptIn ;
+               for ( int i = 0 ; i < ssize( IntersectionResults) ; ++i) {
+                  // Se c'è intersezione
+                  if ( IntersectionResults[i].nILTT != ILTT_NO) {
+                     if ( i > 0) {
+                        int z = i - 1 ;
+                        // controllo se l'intersezione corrente è coincidente con la precedente, per esempio se ILTT == 4 ( intersezione su un lato di un triangolo, quindi con 2 triangoli)
+                        if ( IntersectionResults[i].dU - IntersectionResults[z].dU < EPS_SMALL  &&
+                           IntersectionResults[i].dCosDN - IntersectionResults[z].dCosDN < EPS_SMALL)
+                           continue ;
+                     }
+                     double dCos = IntersectionResults[i].dCosDN ;
+                     // entro nella superficie trimesh
+                     if ( dCos < - dCosSmall) {
+                        ptIn = IntersectionResults[i].ptI ;
+
+                        int nT = IntersectionResults[i].nT ;
+                        int nF = Surf.GetFacetFromTria( nT) ;
+
+                        Surf.GetFacetNormal( nF, vtInN) ;
+
+                        bInside = true ;
+                     }
+
+                     // esco dalla superficie trimesh
+                     else if ( dCos > dCosSmall  &&  bInside) {
+                        Point3d ptOut = IntersectionResults[i].ptI ;
+
+                        int nT = IntersectionResults[i].nT ;
+                        int nF = Surf.GetFacetFromTria( nT) ;
+
+                        Vector3d vtOutN ;
+                        Surf.GetFacetNormal( nF, vtOutN) ; 
+
+                        // Aggiungo un tratto al dexel
+                        vNewIntervals.emplace_back() ;
+
+                        // Aggiorno dati del tratto di dexel 
+                        vNewIntervals.back().dMin = ptIn.v[(nG+2)%3] - ptMapOrig.v[(nG+2)%3] ;
+                        vNewIntervals.back().dMax = ptOut.v[(nG+2)%3] - ptMapOrig.v[(nG+2)%3] ;
+                        vNewIntervals.back().vtMinN = vtInN ;
+                        vNewIntervals.back().vtMaxN = vtOutN ;
+                        vNewIntervals.back().nToolMin = 0 ;
+                        vNewIntervals.back().nToolMax = 0 ;
+                        vNewIntervals.back().nCompo = 0 ;
+
+                        bInside = false ;
+                     }
+                  } 
+               }
+               // controllo che abbia un intervallo in più rispetto a quelli di prima
+               if ( ssize( vNewIntervals)  ==  ssize( m_Values[nG][nPos]) + 1) {
+                  // dovrei verificare che quello in più sia effettivamente quello ricercato????
+                  double dMinDist = INFINITO ;
+                  for ( const auto& data : vNewIntervals) {
+                     if ( abs( data.dMin - dPosRef) < dMinDist) {
+                        dMinDist = abs( data.dMin - dPosRef) ;
+                        ptInt.Set( itc.nI + 0.5, itc.nJ + 0.5, data.dMax) ;
+                        vtMeanN = data.vtMaxN ;
+                        bFound = true ;
+                     }
+                     if ( abs( data.dMax - dPosRef) < dMinDist) {
+                        dMinDist = abs( data.dMax - dPosRef) ;
+                        ptInt.Set( itc.nI + 0.5, itc.nJ + 0.5, data.dMin) ;
+                        vtMeanN = data.vtMinN ;
+                        bFound = true ;
+                     }
+                  }
+               }
+               if ( bFound)
+                  break ;
+            }
+            if ( bFound)
+               break ;
+         }
+         // se cercando nei d'intorni dello spillone non ho trovato l'intersezione mancante, mi arrendo
+         if ( ! bFound)
+            continue ;
+      }
+         
+      double dMin, dMax ;
+      Vector3d vtMinN, vtMaxN ;
+      if ( itc.dU < ptInt.z) {
+         dMin = itc.dU ;
+         dMax = ptInt.z ;
+         vtMinN = itc.vtN ;
+         vtMaxN = vtMeanN ;
+      }
+      else {
+         dMin = ptInt.z ;
+         dMax = itc.dU ;
+         vtMinN = vtMeanN ;
+         vtMaxN = itc.vtN ;
+      }
+      //// prima di aggiungere il tratto verifico che non si sovrapponga con un tratto già presente
+      //for ( const auto& data: m_Values[nG][nPos]) {
+      //   if ( ( dMin > data.dMin  &&  dMin < data.dMax)  ||
+      //        ( dMax > data.dMin  &&  dMax < data.dMax)  ||
+      //        ( dMin < data.dMin  &&  dMax > data.dMax))
+      //      continue ;
+      //}
+
+      m_Values[nG][nPos].emplace_back() ;
+      m_Values[nG][nPos].back().dMin = dMin;
+      m_Values[nG][nPos].back().dMax = dMax ;
+      m_Values[nG][nPos].back().vtMinN = vtMinN ;
+      m_Values[nG][nPos].back().vtMaxN = vtMaxN ;
+      m_Values[nG][nPos].back().nToolMin = 0 ;
+      m_Values[nG][nPos].back().nToolMax = 0 ;
+      m_Values[nG][nPos].back().nCompo = 0 ;
+      std::sort( m_Values[nG][nPos].begin(), m_Values[nG][nPos].end(), []( Data& a, Data& b) { return a.dMin < b.dMin ;}) ;
+   }
+
+   return true ;
+}

VolZmapOffset.cpp

@@ -21,6 +21,7 @@
 #include "CurveLine.h"
 #include "CurveArc.h"
 #include "GeoConst.h"
+#include "IntersLineCyl.h"
 #include "/EgtDev/Include/EGkStmFromCurves.h"
 #include "/EgtDev/Include/EGkIntersLineSurfTm.h"
 #include "/EgtDev/Include/EgtNumUtils.h"
@@ -968,12 +969,13 @@ VolZmap::CreateOffsetCylinderOnEdge( const Point3d& ptP1, const Point3d& ptP2, d
          Point3d ptC( ( i + 0.5) * m_dStep, ( j + 0.5) * m_dStep, 0) ;
          Point3d ptInt1, ptInt2 ;
          Vector3d vtN1, vtN2 ;
-         if ( IntersLineCylinder( ptC, Z_AX, CylFrame, dH, abs( dOffs), true, true,
-                                  ptInt1, vtN1, ptInt2, vtN2)) {
+         double dU1, dU2 ;
+         if ( IntersLineCyl( ptC, Z_AX, CylFrame, dH, abs( dOffs), true, true,
+                             dU1, ptInt1, vtN1, dU2, ptInt2, vtN2, false, false)) {
             if ( dOffs > 0.)
-               AddIntervalsForOffset( nGrid, i, j, ptInt1.z, ptInt2.z, -vtN1, -vtN2, nTool, nTool) ;
+               AddIntervalsForOffset( nGrid, i, j, ptInt1.z, ptInt2.z, vtN1, vtN2, nTool, nTool) ;
             else
-               SubtractIntervalsForOffset( nGrid, i, j, ptInt1.z, ptInt2.z, vtN1, vtN2, nTool) ;
+               SubtractIntervalsForOffset( nGrid, i, j, ptInt1.z, ptInt2.z, -vtN1, -vtN2, nTool) ;
          }
       }
    }

VolZmapVolume.cpp

@@ -21,6 +21,7 @@
 #include "VolZmap.h"
 #include "GeoConst.h"
 #include "IntersLineBox.h"
+#include "IntersLineCyl.h"
 #include "/EgtDev/Include/EGkIntervals.h"
 #include "/EgtDev/Include/EGkStringUtils3d.h"
 #include "/EgtDev/Include/EGkSurfBezier.h"
@@ -2609,7 +2610,15 @@ VolZmap::MillingGeneralMotionStep( const Point3d& ptPs, const Vector3d& vtDs, co
 
   // Calcolo angoli di rotazione utensile longitudinale e trasversale rispetto al movimento per eventuale suddivisione
    double dAlongAngDeg, dAcrossAngDeg ;
-   GetAlongAcrossRotation( vtDs, vtDe, ptPe - ptPs, dAlongAngDeg, dAcrossAngDeg) ;
+   if ( m_vTool[m_nCurrTool].GetRadius() < 40)
+      GetAlongAcrossRotation( vtDs, vtDe, ptPe - ptPs, dAlongAngDeg, dAcrossAngDeg) ;
+   else {
+      // se è una lama uso un asse diverso per calcolare le rotaziona del vettore tool
+      Vector3d vtAxis = vtDs ^ vtDe ;
+      GetAlongAcrossRotation( vtDs, vtDe, vtAxis, dAlongAngDeg, dAcrossAngDeg) ;
+      swap( dAlongAngDeg, dAcrossAngDeg) ;
+   }
+
 
   // Calcolo numero degli step di movimento
    int nStepCnt = int( max( { abs( dAlongAngDeg) / ANG_ALONG_STEP, abs( dAcrossAngDeg) / ANG_ACROSS_STEP, 1.})) ;
@@ -2718,7 +2727,7 @@ VolZmap::MillingGeneralMotionStep( const Point3d& ptPs, const Vector3d& vtDs, co
       InitializePointsAndVectors( ptSti, ptEni, vtDSi, vtDEi, ptLs, ptLe, vtLs, vtLe) ;
 
       // Standard è multithread
-      constexpr bool MULTITHREAD = false ;
+      constexpr bool MULTITHREAD = true ;
       if ( MULTITHREAD) {
          // Ciclo sulle mappe
          vector<future<bool>> vRes( m_nMapNum) ;
@@ -6249,7 +6258,8 @@ VolZmap::CompCyl_Drilling( int nGrid, const Point3d& ptS, const Point3d& ptE, co
          Point3d ptC( ( i + 0.5) * m_dStep, ( j + 0.5) * m_dStep, 0) ;
          Point3d ptInt1, ptInt2 ;
          Vector3d vtN1, vtN2 ;
-         if ( IntersLineCylinder( ptC, Z_AX, CylFrame, dH, dRad, bTapB, bTapT, ptInt1, vtN1, ptInt2, vtN2)) {
+         double dU1, dU2 ;
+         if ( IntersLineCyl( ptC, Z_AX, CylFrame, dH, dRad, bTapB, bTapT, dU1, ptInt1, vtN1, dU2, ptInt2, vtN2, false, true)) {
             SubtractIntervals( nGrid, i, j, ptInt1.z, ptInt2.z, vtN1, vtN2, nToolNum) ;
          }
       }
@@ -6294,8 +6304,9 @@ VolZmap::CompConus_Drilling( int nGrid, const Point3d& ptS, const Point3d& ptE,
          Vector3d vtN1, vtN2 ;
 
         // Cilindro
-         if ( IntersLineCylinder( ptC, Z_AX, CylFrame, dH, dMaxRad, true, bTapT,
-                                  ptInt1, vtN1, ptInt2, vtN2)) {
+         double dU1, dU2 ;
+         if ( IntersLineCyl( ptC, Z_AX, CylFrame, dH, dMaxRad, true, bTapT,
+                             dU1, ptInt1, vtN1, dU2, ptInt2, vtN2, false, true)) {
             SubtractIntervals( nGrid, i, j, ptInt1.z, ptInt2.z, vtN1, vtN2, nToolNum) ;
          }
 
@@ -6474,7 +6485,8 @@ VolZmap::CompCyl_Milling( int nGrid, const Point3d& ptS, const Point3d& ptE,
 
               // Cilindro iniziale
                CylFrame.ChangeOrig( ptITip) ;
-               if ( IntersLineCylinder( ptC, Z_AX, CylFrame, dHei, dRad, bTapB, bTapT, ptInt1, vtN1, ptInt2, vtN2)) {
+               double dU1, dU2 ;
+               if ( IntersLineCyl( ptC, Z_AX, CylFrame, dHei, dRad, bTapB, bTapT, dU1, ptInt1, vtN1, dU2, ptInt2, vtN2, false, true)) {
                   SubtractIntervals( nGrid, i, j, ptInt1.z, ptInt2.z, vtN1, vtN2, nToolNum) ;
                }
 
@@ -6482,7 +6494,7 @@ VolZmap::CompCyl_Milling( int nGrid, const Point3d& ptS, const Point3d& ptE,
               // del sistema di riferimento, quindi usiamo lo stesso sistema sommando a ptC
               // il vettore che congiunge le due origini.
                CylFrame.ChangeOrig( ptITip + vtMove) ;
-               if ( IntersLineCylinder( ptC, Z_AX, CylFrame, dHei, dRad, bTapB, bTapT, ptInt1, vtN1, ptInt2, vtN2)) {
+               if ( IntersLineCyl( ptC, Z_AX, CylFrame, dHei, dRad, bTapB, bTapT, dU1, ptInt1, vtN1, dU2, ptInt2, vtN2, false, true)) {
                   SubtractIntervals( nGrid, i, j, ptInt1.z, ptInt2.z, vtN1, vtN2, nToolNum) ;
                }
 
@@ -7069,7 +7081,8 @@ VolZmap::CompBall_Milling( int nGrid, const Point3d& ptLs, const Point3d& ptLe,
         // Cilindro inviluppo della sfera
          Point3d ptInt1, ptInt2 ;
          Vector3d vtN1, vtN2 ;
-         if ( IntersLineCylinder( ptC, Z_AX, CylFrame, dLengthPath, dRad, false, false, ptInt1, vtN1, ptInt2, vtN2)) {
+         double dU1, dU2 ;
+         if ( IntersLineCyl( ptC, Z_AX, CylFrame, dLengthPath, dRad, false, false, dU1, ptInt1, vtN1, dU2, ptInt2, vtN2, false, true)) {
             SubtractIntervals( nGrid, i, j, ptInt1.z, ptInt2.z, vtN1, vtN2, nToolNum) ;
          }
       }
@@ -7217,15 +7230,15 @@ VolZmap::AddingCylinder( int nGrid, const Point3d& ptS, const Point3d& ptE, cons
                                            
          Point3d ptInt1, ptInt2 ;
          Vector3d vtN1, vtN2 ;
-
-         if ( IntersLineCylinder( ptC, Z_AX, CylFrame, dHei, dRad, true, true,
-                                  ptInt1, vtN1, ptInt2, vtN2)) {
-            AddIntervals( nGrid, i, j, ptInt1.z, ptInt2.z, - vtN1, - vtN2, CurrTool.GetToolNum()) ;
+         double dU1, dU2 ;
+         if ( IntersLineCyl( ptC, Z_AX, CylFrame, dHei, dRad, true, true,
+                             dU1, ptInt1, vtN1, dU2, ptInt2, vtN2, false, false)) {
+            AddIntervals( nGrid, i, j, ptInt1.z, ptInt2.z, vtN1, vtN2, CurrTool.GetToolNum()) ;
          }
 
-         if ( IntersLineCylinder( ptC - dLen1 * vtV1, Z_AX, CylFrame, dHei, dRad, true, true,
-                                  ptInt1, vtN1, ptInt2, vtN2)) {
-            AddIntervals( nGrid, i, j, ptInt1.z + dLen1 * vtV1.z, ptInt2.z + dLen1 * vtV1.z, - vtN1, - vtN2, CurrTool.GetToolNum()) ;
+         if ( IntersLineCyl( ptC - dLen1 * vtV1, Z_AX, CylFrame, dHei, dRad, true, true,
+                             dU1, ptInt1, vtN1, dU2, ptInt2, vtN2, false, false)) {
+            AddIntervals( nGrid, i, j, ptInt1.z + dLen1 * vtV1.z, ptInt2.z + dLen1 * vtV1.z, vtN1, vtN2, CurrTool.GetToolNum()) ;
          }
 
          if ( IntersLineMyPolyhedron( ptC, Z_AX, PolyFrame, dLen1, 2 * ( dRad + dMyTol), dHei + 2 * dMyTol, 0,
@@ -7621,8 +7634,9 @@ VolZmap::AddingSphere( int nGrid, const Point3d& ptS, const Point3d& ptE, double
         // Cilindro inviluppo della sfera
          Point3d ptInt1, ptInt2 ;
          Vector3d vtN1, vtN2 ;
-         if ( IntersLineCylinder( ptC, Z_AX, CylFrame, dLengthPath, dRad, false, false, ptInt1, vtN1, ptInt2, vtN2)) {
-            AddIntervals( nGrid, i, j, ptInt1.z, ptInt2.z, - vtN1, - vtN2, CurrTool.GetToolNum()) ;
+         double dU1, dU2 ;
+         if ( IntersLineCyl( ptC, Z_AX, CylFrame, dLengthPath, dRad, false, false, dU1, ptInt1, vtN1, dU2, ptInt2, vtN2, false, false)) {
+            AddIntervals( nGrid, i, j, ptInt1.z, ptInt2.z, vtN1, vtN2, CurrTool.GetToolNum()) ;
          }
       }
    }

Voronoi.cpp

@@ -434,6 +434,7 @@ Voronoi::GetBisectorCurve( int i)
       pLine->Set( ptS, ptE) ;
       pLine->SetTempParam( dParS, 0) ;
       pLine->SetTempParam( dParE, 1) ;
+      pLine->SetTempProp( i) ;
       pLine->ToGlob( m_Frame) ;
       return pLine ;
    }
@@ -454,6 +455,7 @@ Voronoi::GetBisectorCurve( int i)
       pArc->SetC2P( ptC, ptS, ptE) ;
       pArc->SetTempParam( dParS, 0) ;
       pArc->SetTempParam( dParS, 1) ; // dParE = dParS
+      pArc->SetTempProp( i) ;
       pArc->ToGlob( m_Frame) ;
       return pArc ;
    }
@@ -473,7 +475,7 @@ Voronoi::GetBisectorCurve( int i)
       bool bInvert = false ;
       double dPar1, dPar2 ;
       m_vroni->GetApproxedBisectorParams( i, dPar1, dPar2) ;
-      if ( dPar1 > dPar2 + EPS_SMALL)
+      if ( dPar1 > dPar2)
          bInvert = true ;
 
      // punto iniziale
@@ -496,6 +498,11 @@ Voronoi::GetBisectorCurve( int i)
             dParPrev = dPar ;
             nCrvCount ++ ;
          }
+         else if ( ( bInvert  &&  j == 0)  ||  ( ! bInvert  &&  j == nPoints - 1)) {
+           // se estremo devo forzarlo
+            pCompo->ModifyEnd( pt) ;
+            dParPrev = dPar ;
+         }
         // aggiorno per punto successivo
          if ( bInvert)
             j -- ;
@@ -506,6 +513,7 @@ Voronoi::GetBisectorCurve( int i)
      // setto parametri sulla curva
       pCompo->SetTempParam( dParS, 0) ;
       pCompo->SetTempParam( dParPrev, 1) ;
+      pCompo->SetTempProp( i) ;
 
       pCompo->ToGlob( m_Frame) ;
       return pCompo ;
@@ -700,8 +708,8 @@ Voronoi::CalcSingleCurvesOffset( ICURVEPOVECTOR& vOffs, double dOffs)
                  // se necessario verifico se dal lato corretto rispetto ai siti di riferimento
                   if ( bLeft  &&  bRight) {
                     // recupero i siti di riferimento
-                     int nOrigCrv1, nOrigSubCrv1, nOrigCrv2, nOrigSubCrv2 ;
-                     m_vroni->GetBisectorSites( i, nOrigCrv1, nOrigSubCrv1, nOrigCrv2, nOrigSubCrv2) ;
+                     int nOrigCrv1, nOrigSubCrv1, nOrigSubPnt1, nOrigCrv2, nOrigSubCrv2, nOrigSubPnt2 ;
+                     m_vroni->GetBisectorSites( i, nOrigCrv1, nOrigSubCrv1, nOrigSubPnt1, nOrigCrv2, nOrigSubCrv2, nOrigSubPnt2) ;
                      if ( nOrigCrv1 != -1) {
                        // verifico il lato rispetto al primo sito
                         pCrv->SetTempProp( nOrigSubCrv1 + 1, 0) ;
@@ -828,10 +836,19 @@ Voronoi::CalcSpecialPointOffset( PNTVECTVECTOR& vResult, double dOffs)
             Point3d ptTemp ;
             Vector3d vtDir ;
             if ( ! pCrv->GetParamAtPoint( pt, dPar, 100 * EPS_SMALL)  ||  ! pCrv->GetPointD1D2( dPar, ICurve::FROM_MINUS, ptTemp, &vtDir))
-               return false ;
+               continue ;
             vtDir.Normalize() ;
 
-            vResult.emplace_back( pt, vtDir) ;
+           // verifico che il punto non sia già stato trovato
+            bool bAdd = true ;
+            for ( int j = 0 ; j < ssize( vResult) ; j ++) {
+               if ( AreSamePointApprox( vResult[j].first, pt)) {
+                  bAdd = false ;
+                  break ;
+               }
+            }
+            if ( bAdd)
+               vResult.emplace_back( pt, vtDir) ;
          }
       }
 
@@ -1252,3 +1269,62 @@ Voronoi::CalcLimitOffset( int nCrv, bool bLeft, double& dOffs)
 
    return true ;
 }
+
+//---------------------------------------------------------------------------
+bool 
+Voronoi::GetBisectorPointAtParam( int nCrv, double dPar, Point3d& ptP) 
+{
+   if ( ! IsValid())
+      return false ;
+
+    try {
+       if ( ! m_bVDComputed)
+          CalcVoronoi() ;
+
+      // verifico se il bisettore e il parametri richiesto sono sensati
+       if ( nCrv >= m_vroni->GetNumberOfEdges())
+          return false ;
+       double dParS, dParE ;
+       m_vroni->GetBisectorParams( nCrv, dParS, dParE) ;
+       if ( dParS > dParE)
+          swap( dParS, dParE) ;
+       if ( dPar < dParS  ||  dPar > dParE)
+          return false ;
+
+      // calcolo il punto sul bisettore in corrispondenza dell'offset
+       m_vroni->GetBisectorPointAtParam( nCrv, dPar, ptP.v) ;
+       ptP.ToGlob( m_Frame) ;
+
+       return true ;
+    }
+    catch (...) {
+       LOG_ERROR( GetEGkLogger(), m_vroni->GetExceptionMessage()) ;
+       return false ;
+    }
+
+}
+
+//---------------------------------------------------------------------------
+bool 
+Voronoi::GetBisectorSites( int nCrv, int& nCrv1, int& nSubCrv1, int& nSubPnt1, int& nCrv2, int& nSubCrv2, int& nSubPnt2)
+{
+   if ( ! IsValid())
+      return false ;
+
+   try {
+      if ( ! m_bVDComputed)
+         CalcVoronoi() ;
+
+     // verifico se il bisettore è valido
+      if ( nCrv >= m_vroni->GetNumberOfEdges())
+         return false ;
+
+     // calcolo il punto sul bisettore in corrispondenza dell'offset
+      m_vroni->GetBisectorSites( nCrv, nCrv1, nSubCrv1, nSubPnt1, nCrv2, nSubCrv2, nSubPnt2) ;
+      return true ;
+   }
+   catch (...) {
+      LOG_ERROR( GetEGkLogger(), m_vroni->GetExceptionMessage()) ;
+      return false ;
+   }
+}

Voronoi.h

@@ -60,6 +60,8 @@ class Voronoi
       bool CalcFatCurve( ICURVEPOVECTOR& vOffs, double dOffs, bool bSquareEnds, bool bSquareMids, bool bMergeOnlySameProps = true) ;
       bool CalcMedialAxis( ICURVEPOVECTOR& vCrvs, int nSide) ;
       bool CalcLimitOffset( int nCrv, bool bLeft, double& dOffs) ;
+      bool GetBisectorPointAtParam( int nCrv, double dPar, Point3d& ptP) ;
+      bool GetBisectorSites( int nCrv, int& nCrv1, int& nSubCrv1, int& nSubPnt1, int& nCrv2, int& nSubCrv2, int& nSubPnt2) ;
 
       bool Translate( const Vector3d& vtMove) ;
       bool Rotate( const Point3d& ptAx, const Vector3d& vtAx, double dAngDeg) ;