From 5f2c853d42aec0c985049ca01fb0c2065ee2e17c Mon Sep 17 00:00:00 2001
From: Dario Sassi <dario.sassi@egalware.com>
Date: Thu, 8 May 2025 09:02:34 +0200
Subject: [PATCH] EgtMachKernel : - ulteriori miglioramenti a AddRawPart con
 grezzo da Trimesh.

---
 MachMgrRawParts.cpp | 50 +++++++++++++++++++++++++++++++++++++--------
 1 file changed, 41 insertions(+), 9 deletions(-)

diff --git a/MachMgrRawParts.cpp b/MachMgrRawParts.cpp
index ea7a1db..15547f3 100644
--- a/MachMgrRawParts.cpp
+++ b/MachMgrRawParts.cpp
@@ -415,13 +415,10 @@ MachMgr::AddRawPart( int nSurfId, Color cCol)
       pStm->GetLocalBBox( b3Srf) ;
      // ne calcolo la silhouette secondo Z+
       bool bSilh = false ;
-      PtrOwner<ICAvParSilhouettesSurfTm> pCavParSilh( CreateCAvParSilhouettesSurfTm()) ;
-      if ( ! IsNull( pCavParSilh)) {
-         Frame3d frSrf( b3Srf.GetMin()) ;
-         const double SILH_TOL = 1.0 ;
+      const int NUM_TRIA_LIM = 500 ;
+      if ( pStm->GetTriangleCount() < NUM_TRIA_LIM) {
          POLYLINEVECTOR vPL ;
-         if ( pCavParSilh->SetData( { pStm}, frSrf, SILH_TOL)  &&
-              pCavParSilh->GetSilhouette( 0, vPL)) {
+         if ( pStm->GetSilhouette( Z_AX, 10.0, vPL)  &&  ! vPL.empty()) {
            // cerco il contorno esterno
             int nInd = - 1 ;
             double dMaxArea = 0 ;
@@ -435,9 +432,44 @@ MachMgr::AddRawPart( int nSurfId, Color cCol)
                }
             }
            // ne deduco la curva
-            if ( nInd >= 0  &&  pCrvCompo->FromPolyLine( vPL[nInd])) {
-               pCrvCompo->SetExtrusion( Z_AX) ;
-               bSilh = true ;
+            PtrOwner<ICurveComposite> pCrvSilh( CreateCurveComposite()) ;
+            if ( nInd >= 0  &&  pCrvSilh->FromPolyLine( vPL[nInd])) {
+               pCrvSilh->SetExtrusion( Z_AX) ;
+               Plane3d plProj ;
+               plProj.Set( b3Srf.GetMin(), Z_AX) ;
+               pCrvCompo.Set( GetCurveComposite( ProjectCurveOnPlane( *pCrvSilh, plProj))) ;
+               if ( ! IsNull( pCrvCompo)) {
+                  pCrvCompo->MergeCurves( 10 * EPS_SMALL, 10 * EPS_ANG_SMALL) ;
+                  bSilh = true ;
+               }
+            }
+         }
+      }
+      else {
+         PtrOwner<ICAvParSilhouettesSurfTm> pCavParSilh( CreateCAvParSilhouettesSurfTm()) ;
+         if ( ! IsNull( pCavParSilh)) {
+            Frame3d frSrf( b3Srf.GetMin()) ;
+            const double SILH_TOL = 1.0 ;
+            POLYLINEVECTOR vPL ;
+            if ( pCavParSilh->SetData( { pStm}, frSrf, SILH_TOL)  &&
+                 pCavParSilh->GetSilhouette( 0, vPL)) {
+              // cerco il contorno esterno
+               int nInd = - 1 ;
+               double dMaxArea = 0 ;
+               for ( int i = 0 ; i < int( vPL.size()) ; ++ i) {
+                  double dArea ;
+                  if ( vPL[i].GetAreaXY( dArea)  &&  abs( dArea) > dMaxArea) {
+                     if ( dArea < 0)
+                        vPL[i].Invert() ;
+                     dMaxArea = abs( dArea) ;
+                     nInd = i ;
+                  }
+               }
+              // ne deduco la curva
+               if ( nInd >= 0  &&  pCrvCompo->FromPolyLine( vPL[nInd])) {
+                  pCrvCompo->SetExtrusion( Z_AX) ;
+                  bSilh = true ;
+               }
             }
          }
       }