0024381: Visualization, TKOpenGl - revise matrices stack and usage of temporary matrices

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

diff --git a/src/OpenGl/OpenGl_Cylinder.cxx b/src/OpenGl/OpenGl_Cylinder.cxx
new file mode 100644 (file)
index 0000000..50f0bc6
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+++ b/src/OpenGl/OpenGl_Cylinder.cxx
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+// Created on: 2014-10-15
+// Created by: Denis Bogolepov
+// Copyright (c) 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 <OpenGl_Cylinder.hxx>
+
+// =======================================================================
+// function : OpenGl_Cylinder
+// purpose  :
+// =======================================================================
+OpenGl_Cylinder::OpenGl_Cylinder()
+: myBotRad (1.0f),
+  myTopRad (1.0f),
+  myHeight (1.0f)
+{
+  //
+}
+
+// =======================================================================
+// function : Init
+// purpose  :
+// =======================================================================
+Standard_Boolean OpenGl_Cylinder::Init (const Standard_ShortReal theBotRad,
+                                        const Standard_ShortReal theTopRad,
+                                        const Standard_ShortReal theHeight,
+                                        const Standard_Integer   theNbSlices,
+                                        const Standard_Integer   theNbStacks)
+{
+  myBotRad = theBotRad;
+  myTopRad = theTopRad;
+  myHeight = theHeight;
+  return OpenGl_Quadric::init (theNbSlices, theNbStacks);
+}
+
+// =======================================================================
+// function : evalVertex
+// purpose  :
+// =======================================================================
+OpenGl_Vec3 OpenGl_Cylinder::evalVertex (const Standard_ShortReal theU,
+                                         const Standard_ShortReal theV) const
+{
+  const Standard_ShortReal aU      = static_cast<Standard_ShortReal> (theU * M_PI * 2.0);
+  const Standard_ShortReal aRadius = myBotRad + (myTopRad - myBotRad) * theV;
+  return OpenGl_Vec3 (cosf (aU) * aRadius,
+                      sinf (aU) * aRadius,
+                      theV * myHeight);
+}
+
+// =======================================================================
+// function : evalNormal
+// purpose  :
+// =======================================================================
+OpenGl_Vec3 OpenGl_Cylinder::evalNormal (const Standard_ShortReal theU,
+                                         const Standard_ShortReal /*theV*/) const
+{
+  const Standard_ShortReal aU = static_cast<Standard_ShortReal> (theU * M_PI * 2.0);
+  return OpenGl_Vec3 (cosf (aU) * myHeight,
+                      sinf (aU) * myHeight,
+                      myBotRad - myTopRad).Normalized();
+}