0031682: Visualization - Prs3d_ShadingAspect::SetTransparency() has no effect with...

[occt.git] / src / CSLib / CSLib_NormalPolyDef.cxx

diff --git a/src/CSLib/CSLib_NormalPolyDef.cxx b/src/CSLib/CSLib_NormalPolyDef.cxx
old mode 100755 (executable)
new mode 100644 (file)
index 2aba8e4..5104fbc
--- a/src/CSLib/CSLib_NormalPolyDef.cxx
+++ b/src/CSLib/CSLib_NormalPolyDef.cxx
@@ -1,10 +1,21 @@
-// File:       SingularityAna_PolyStyle.cxx
-// Created:    Fri Aug 23 11:00:24 1996
-// Author:     Benoit TANNIOU
-//             <bt1@sgi65>
+// Created on: 1996-08-23
+// Created by: Benoit TANNIOU
+// Copyright (c) 1996-1999 Matra Datavision
+// Copyright (c) 1999-2014 OPEN CASCADE SAS
+//
+// This file is part of Open CASCADE Technology software library.
+//
+// This library is free software; you can redistribute it and/or modify it under
+// the terms of the GNU Lesser General Public License version 2.1 as published
+// by the Free Software Foundation, with special exception defined in the file
+// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
+// distribution for complete text of the license and disclaimer of any warranty.
+//
+// Alternatively, this file may be used under the terms of Open CASCADE
+// commercial license or contractual agreement.
 
 
-#include <CSLib_NormalPolyDef.ixx>
+#include <CSLib_NormalPolyDef.hxx>
 #include <PLib.hxx>
 
 //=============================================================================
@@ -28,6 +39,11 @@ Standard_Boolean CSLib_NormalPolyDef::Value(const Standard_Real X,
   co=cos(X);
   si=sin(X);
 
+  if(Abs(co) <= RealSmall() || Abs(si) <= RealSmall())
+  {
+    F = 0.;
+    return Standard_True;
+  }
   for(Standard_Integer i=0;i<=myK0;i++){
     F=F+PLib::Bin(myK0,i)*pow(co,i)*pow(si,(myK0-i))*myTABli(i);
   }
@@ -43,6 +59,11 @@ Standard_Boolean CSLib_NormalPolyDef::Derivative(const Standard_Real X,
   Standard_Real co,si;
   co=cos(X);
   si=sin(X);
+  if(Abs(co) <= RealSmall() || Abs(si) <= RealSmall())
+  {
+    D = 0.;
+    return Standard_True;
+  }
   for(Standard_Integer i=0;i<=myK0;i++){
     D=D+PLib::Bin(myK0,i)*pow(co,(i-1))*pow(si,(myK0-i-1))*(myK0*co*co-i);
   }
@@ -60,6 +81,12 @@ Standard_Boolean CSLib_NormalPolyDef::Values(const Standard_Real X,
   Standard_Real co,si;
   co=cos(X);
   si=sin(X);
+  if(Abs(co) <= RealSmall() || Abs(si) <= RealSmall())
+  {
+    F = 0.;
+    D = 0.;
+    return Standard_True;
+  }
   for(Standard_Integer i=0;i<=myK0;i++){
     F=F+PLib::Bin(myK0,i)*pow(co,i)*pow(si,(myK0-i))*myTABli(i);
     D=D+PLib::Bin(myK0,i)*pow(co,(i-1))*