X-Git-Url: http://git.dev.opencascade.org/gitweb/?p=occt.git;a=blobdiff_plain;f=src%2FOpenGl%2FOpenGl_BVHTreeSelector.cxx;h=95edcad41fda1443319cb0ffd2de0d116c551bf9;hb=d918208af6aa2917817c1ddf82057d4bd391ad8b;hpb=98ae54f728a7ed99c2b4e4d5fc06488a3ccb2ddd

diff --git a/src/OpenGl/OpenGl_BVHTreeSelector.cxx b/src/OpenGl/OpenGl_BVHTreeSelector.cxx
index a3bcd1edd3..95edcad41f 100644
--- a/src/OpenGl/OpenGl_BVHTreeSelector.cxx
+++ b/src/OpenGl/OpenGl_BVHTreeSelector.cxx
@@ -96,10 +96,10 @@ void OpenGl_BVHTreeSelector::SetViewportSize (Standard_Integer theViewportWidth,
                                               Standard_Integer theViewportHeight,
                                               Standard_Real theResolutionRatio)
 {
-  myViewportHeight = theViewportHeight;
-  myViewportWidth  = theViewportWidth;
-  myPixelSize = Max (theResolutionRatio / theViewportHeight,
-                     theResolutionRatio / theViewportWidth);
+  myViewportHeight = theViewportHeight > 0 ? theViewportHeight : 1;
+  myViewportWidth  = theViewportWidth  > 0 ? theViewportWidth  : 1;
+  myPixelSize = Max (theResolutionRatio / myViewportHeight,
+                     theResolutionRatio / myViewportWidth);
 }
 
 // =======================================================================