EgtGraphics :

- modifiche per vettore nullo
- snap endpoint anche su tip di vettore.

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) {

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) {