From a4582b3fc2e69895a836edb3b8f2046d036126f4 Mon Sep 17 00:00:00 2001
From: Dario Sassi <dario.s@egaltech.com>
Date: Sun, 31 May 2015 14:05:58 +0000
Subject: [PATCH] EgtGraphics : - modifiche per vettore nullo - snap endpoint
 anche su tip di vettore.

---
 SceneGeom.cpp |  8 +++++---
 SceneSnap.cpp | 11 +++++++++++
 2 files changed, 16 insertions(+), 3 deletions(-)

diff --git a/SceneGeom.cpp b/SceneGeom.cpp
index 06f7ba5..c45fe9f 100644
--- a/SceneGeom.cpp
+++ b/SceneGeom.cpp
@@ -191,11 +191,13 @@ Scene::DrawGeoObj( const IGdbIterator& iIter, int nPass, const MdStMkCol& siObj)
          if ( pVector == nullptr)
             return false ;
         // calcolo la grafica
-         PolyLine PL ;
-         pVector->GetDrawWithArrowHead( 0.1, 10, PL) ;
          pGraphics->Clear() ;
          pGraphics->AddColor( siObj.colObj) ;
-         pGraphics->AddPolyLine( PL) ;
+         PolyLine PL ;
+         if ( pVector->GetDrawWithArrowHead( 0.1, 10, PL))
+            pGraphics->AddPolyLine(PL) ;
+         else
+            pGraphics->AddPoint( pVector->GetBase()) ;
       }
      // se punto
       else if ( nGeoType == GEO_PNT3D) {
diff --git a/SceneSnap.cpp b/SceneSnap.cpp
index dbc2e3d..df52979 100644
--- a/SceneSnap.cpp
+++ b/SceneSnap.cpp
@@ -250,6 +250,17 @@ Scene::FindSelectedSnapPoint( int nSnap, const Point3d& ptWin, int nW, int nH)
             m_vtLastSnapDir = pGV->GetVector() ;
             m_vtLastSnapDir.ToGlob( frEnt) ;
          }
+        // recupero il punto tip
+         Point3d ptTip= pGV->GetBase() + pGV->GetVector() ;
+         ptTip.ToGlob( frEnt) ;
+         if ( VerifySnapPoint( ptTip, ptWin, dMinSqDist)) {
+            bFound = true ;
+            m_nLastSnapId = nId ;
+            m_ptLastSnapPnt = ptTip ;
+            m_bLastSnapDirOk = true ;
+            m_vtLastSnapDir = pGV->GetVector() ;
+            m_vtLastSnapDir.ToGlob( frEnt) ;
+         }
       }
      // se frame
       else if ( pGObj->GetType() == GEO_FRAME3D) {