From: Viktor UZLOV <viktor.uzlov@opencascade.com>
Date: Thu, 15 Jul 2021 17:38:17 +0000 (+0300)
Subject: #19463 fix edges flickering with group of volumes
X-Git-Url: http://git.salome-platform.org/gitweb/?a=commitdiff_plain;h=d790688908082d0e8047cab3b1a3a94b1834f614;p=modules%2Fsmesh.git

#19463 fix edges flickering with group of volumes
---

diff --git a/src/OBJECT/SMESH_Actor.cxx b/src/OBJECT/SMESH_Actor.cxx
index 8baeb3c8b..0b3dcee32 100644
--- a/src/OBJECT/SMESH_Actor.cxx
+++ b/src/OBJECT/SMESH_Actor.cxx
@@ -1270,15 +1270,7 @@ bool SMESH_ActorDef::Init(TVisualObjPtr theVisualObj,
   // coincident patch. See also #18940.
   // NOTE: use Resolve coincident topology for actors in the same 
   // mapper. If several mappers, then use Relative coincident topology
-  double aFactor, aUnits;
-  my2DActor->GetPolygonOffsetParameters(aFactor,aUnits);
-  my2DActor->SetPolygonOffsetParameters(aFactor,aUnits);
-  my2DExtActor->SetPolygonOffsetParameters(aFactor,aUnits*0.5);
-  my3DActor->SetPolygonOffsetParameters(aFactor*2,aUnits*2);
-  myHighlitableActor->GetMapper()->SetRelativeCoincidentTopologyLineOffsetParameters(aFactor*(-1.0),
-                                                                                     aUnits*(-50));
-  my2DActor->GetMapper()->SetRelativeCoincidentTopologyPolygonOffsetParameters(-aFactor, -aUnits);
-  my3DActor->GetMapper()->SetRelativeCoincidentTopologyLineOffsetParameters(-aUnits-1, -aUnits-1);
+  SetRelativeTopologyOffsetParameters(2, 2);
 
   SUIT_ResourceMgr* mgr = SUIT_Session::session()->resourceMgr();
   if( !mgr )
@@ -2559,6 +2551,16 @@ void SMESH_ActorDef::SetMarkerTexture( int theMarkerId, VTK::MarkerTexture theMa
   myMarkerTexture = theMarkerTexture; // for deferred update of myHighlightActor
 }
 
+void SMESH_ActorDef::SetRelativeTopologyOffsetParameters(double f, double u,
+                                                         double f_delta, double u_delta)
+{
+  my2DActor->SetPolygonOffsetParameters(f,u + u_delta);
+  my2DExtActor->SetPolygonOffsetParameters(f,u*0.5 + u_delta);
+  my3DActor->SetPolygonOffsetParameters(f,u*2 + u_delta);
+  myHighlitableActor->GetMapper()->SetRelativeCoincidentTopologyLineOffsetParameters(-f + f_delta,
+                                                                                     u*(-50) + 10*u_delta);
+}
+
 void SMESH_ActorDef::UpdateFilter()
 {
   unsigned int anObjectEntities = eAllEntity; // entities present in my object
diff --git a/src/OBJECT/SMESH_Actor.h b/src/OBJECT/SMESH_Actor.h
index 6de50af11..bcb684a76 100644
--- a/src/OBJECT/SMESH_Actor.h
+++ b/src/OBJECT/SMESH_Actor.h
@@ -176,6 +176,9 @@ class SMESHOBJECT_EXPORT SMESH_Actor: public SALOME_Actor
 
   virtual void UpdateFilter() = 0;
 
+  virtual void SetRelativeTopologyOffsetParameters(double f, double u,
+                                                   double f_delta = 0, double u_delta = 0) = 0;
+
 #ifndef DISABLE_PLOT2DVIEWER
   virtual SPlot2d_Histogram* GetPlot2Histogram() = 0;
   virtual SPlot2d_Histogram* UpdatePlot2Histogram() = 0;
diff --git a/src/OBJECT/SMESH_ActorDef.h b/src/OBJECT/SMESH_ActorDef.h
index 0d3051c54..67efe4482 100644
--- a/src/OBJECT/SMESH_ActorDef.h
+++ b/src/OBJECT/SMESH_ActorDef.h
@@ -239,6 +239,9 @@ class SMESH_ActorDef : public SMESH_Actor
   virtual void SetMarkerStd( VTK::MarkerType, VTK::MarkerScale );
   virtual void SetMarkerTexture( int, VTK::MarkerTexture );
 
+  virtual void SetRelativeTopologyOffsetParameters(double f, double u,
+                                                   double f_delta = 0, double u_delta = 0);
+
   virtual void UpdateFilter();
 
  protected:
diff --git a/src/SMESHGUI/SMESHGUI_VTKUtils.cxx b/src/SMESHGUI/SMESHGUI_VTKUtils.cxx
index e3d6adeab..77267b55f 100644
--- a/src/SMESHGUI/SMESHGUI_VTKUtils.cxx
+++ b/src/SMESHGUI/SMESHGUI_VTKUtils.cxx
@@ -676,6 +676,7 @@ namespace SMESH
             anActor->SetVolumeColor( aColor.R, aColor.G, aColor.B, deltaV );
           else
             anActor->SetSufaceColor( aColor.R, aColor.G, aColor.B, deltaF );
+          anActor->SetRelativeTopologyOffsetParameters(2, 2, 1, 3);
         }
       }
     }