0030982: Visualization, OpenGl_View::MinMaxValues() - do not add background quad...

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

diff --git a/src/OpenGl/OpenGl_View_Raytrace.cxx b/src/OpenGl/OpenGl_View_Raytrace.cxx
index 5530426..b667440 100644 (file)
--- a/src/OpenGl/OpenGl_View_Raytrace.cxx
+++ b/src/OpenGl/OpenGl_View_Raytrace.cxx
@@ -2584,6 +2584,16 @@ Standard_Boolean OpenGl_View::setUniformState (const Standard_Integer        the
   {
     aBackColorTop = myBackgrounds[Graphic3d_TOB_GRADIENT]->GradientColor (0);
     aBackColorBot = myBackgrounds[Graphic3d_TOB_GRADIENT]->GradientColor (1);
+
+    if (myCamera->Tile().IsValid())
+    {
+      Standard_Integer aTileOffset = myCamera->Tile().OffsetLowerLeft().y();
+      Standard_Integer aTileSize = myCamera->Tile().TileSize.y();
+      Standard_Integer aViewSize = myCamera->Tile().TotalSize.y();
+      OpenGl_Vec4 aColorRange = aBackColorTop - aBackColorBot;
+      aBackColorBot = aBackColorBot + aColorRange * ((float) aTileOffset / aViewSize);
+      aBackColorTop = aBackColorBot + aColorRange * ((float) aTileSize / aViewSize);
+    }
   }
   aBackColorTop = theGlContext->Vec4FromQuantityColor (aBackColorTop);
   aBackColorBot = theGlContext->Vec4FromQuantityColor (aBackColorBot);