From 3ef15352f51f4bf549ddee26e00b830b8dec3d5b Mon Sep 17 00:00:00 2001
From: Dario Sassi <dario.s@egaltech.com>
Date: Sun, 30 Aug 2020 11:27:31 +0000
Subject: [PATCH] EgtGeomKernel : - a funzione FlattenCurve aggiunto parametro
 opzionale per uso estrusione.

---
 CurveAux.cpp | 24 ++++++++++++++++++++----
 1 file changed, 20 insertions(+), 4 deletions(-)

diff --git a/CurveAux.cpp b/CurveAux.cpp
index 7512a58..48ebc9a 100644
--- a/CurveAux.cpp
+++ b/CurveAux.cpp
@@ -701,14 +701,16 @@ NurbsToBezierCurve( const CNurbsData& cnData)
 
 //----------------------------------------------------------------------------
 ICurve*
-FlattenCurve( const ICurve& crCrv, double dToler, double dAngToler)
+FlattenCurve( const ICurve& crCrv, double dToler, double dAngToler, int nFlag)
 {
   // Determino il piano medio della curva e verifico se scostamento accettabile
    Plane3d plMid ;
-   if ( ! crCrv.IsFlat( plMid, false, dToler))
+   if ( ! crCrv.IsFlat( plMid, ( nFlag == FLTCRV_USE_EXTR), dToler))
       return nullptr ;
   // Recupero estrusione rispetto alla normale al piano medio
    Vector3d vtExtr ; crCrv.GetExtrusion( vtExtr) ;
+   if ( nFlag == FLTCRV_USE_EXTR)
+      plMid.Set( plMid.GetPoint(), vtExtr) ;
   // Determino il suo centro geometrico
    Point3d ptCen ;
    if ( ! crCrv.GetCentroid( ptCen))
@@ -732,7 +734,14 @@ FlattenCurve( const ICurve& crCrv, double dToler, double dAngToler)
       if ( IsNull( pCrv))
          return nullptr ;
      // assegno estrusione
-      pCrv->SetExtrusion( vtExtr) ;
+      if ( nFlag != FLTCRV_SET_EXTR)
+         pCrv->SetExtrusion( vtExtr) ;
+      else {
+         if ( vtExtr * plMid.GetVersN() >= 0)
+            pCrv->SetExtrusion( plMid.GetVersN()) ;
+         else
+            pCrv->SetExtrusion( - plMid.GetVersN()) ;
+      }
      // restituisco la copia della curva
       return Release( pCrv) ;
    }
@@ -750,7 +759,14 @@ FlattenCurve( const ICurve& crCrv, double dToler, double dAngToler)
       if ( ! pCrv->Scale( frRef, 1, 1, 0))
          return nullptr ;
      // assegno estrusione
-      pCrv->SetExtrusion( vtExtr) ;
+      if ( nFlag != FLTCRV_SET_EXTR)
+         pCrv->SetExtrusion( vtExtr) ;
+      else {
+         if ( vtExtr * plMid.GetVersN() >= 0)
+            pCrv->SetExtrusion( plMid.GetVersN()) ;
+         else
+            pCrv->SetExtrusion( - plMid.GetVersN()) ;
+      }
      // restituisco la nuova curva
       return Release( pCrv) ;
    }