0028760: Visualization, TKOpenGl - avoid excessive frustum culling traverse within...

[occt.git] / src / OpenGl / OpenGl_LayerList.cxx

diff --git a/src/OpenGl/OpenGl_LayerList.cxx b/src/OpenGl/OpenGl_LayerList.cxx
index aa361ac..eddee5b 100644 (file)
--- a/src/OpenGl/OpenGl_LayerList.cxx
+++ b/src/OpenGl/OpenGl_LayerList.cxx
@@ -509,6 +509,26 @@ void OpenGl_LayerList::SetLayerSettings (const Graphic3d_ZLayerId        theLaye
   aLayer.SetLayerSettings (theSettings);
 }
 
+//=======================================================================
+//function : UpdateCulling
+//purpose  :
+//=======================================================================
+void OpenGl_LayerList::UpdateCulling (const Handle(OpenGl_Workspace)& theWorkspace,
+                                      const Standard_Boolean theToDrawImmediate)
+{
+  const OpenGl_BVHTreeSelector& aSelector = theWorkspace->View()->BVHTreeSelector();
+  for (OpenGl_IndexedLayerIterator anIts (myLayers); anIts.More(); anIts.Next())
+  {
+    OpenGl_Layer& aLayer = *anIts.ChangeValue();
+    if (aLayer.IsImmediate() != theToDrawImmediate)
+    {
+      continue;
+    }
+
+    aLayer.UpdateCulling (aSelector, theWorkspace->IsCullingEnabled());
+  }
+}
+
 //=======================================================================
 //function : Render
 //purpose  :
@@ -588,7 +608,7 @@ void OpenGl_LayerList::Render (const Handle(OpenGl_Workspace)& theWorkspace,
         {
           aClearDepthLayer = aLayerIter.Index();
         }
-        if (aLayer.NbStructures() < 1)
+        if (aLayer.IsCulled())
         {
           continue;
         }