0027821: Visualization, AIS_Shape - add NULL checks for displaying TopoDS_Face with...

[occt.git] / src / Prs3d / Prs3d_ShapeTool.cxx

diff --git a/src/Prs3d/Prs3d_ShapeTool.cxx b/src/Prs3d/Prs3d_ShapeTool.cxx
index cf47f64..edb8912 100644 (file)
--- a/src/Prs3d/Prs3d_ShapeTool.cxx
+++ b/src/Prs3d/Prs3d_ShapeTool.cxx
@@ -147,6 +147,11 @@ Standard_Boolean Prs3d_ShapeTool::IsPlanarFace() const
   TopLoc_Location l;
   const TopoDS_Face& F = TopoDS::Face(myFaceExplorer.Current());
   const Handle(Geom_Surface)& S = BRep_Tool::Surface(F, l);
+  if (S.IsNull())
+  {
+    return Standard_False;
+  }
+
   Handle(Standard_Type) TheType = S->DynamicType();
 
   if (TheType == STANDARD_TYPE(Geom_RectangularTrimmedSurface)) {