Added catmull clark subdivider. Thanks to Leon Kos for the code.

git-svn-id: http://www.openmesh.org/svnrepo/OpenMesh/trunk@609 fdac6126-5c0c-442c-9429-916003d36597

Doc/subdivider.docu

@@ -2,6 +2,8 @@
 
 /** \page subdivider_docu Sudivision Tools
 
+\section Overview
+
 The %OpenMesh library provides a few tools for uniform and adaptive
 subdivision:
 
@@ -11,11 +13,27 @@ subdivision:
   -# OpenMesh::Subdivider::Uniform::ModifiedButterflyT
   -# OpenMesh::Subdivider::Uniform::InterpolatingSqrt3LGT
   -# OpenMesh::Subdivider::Uniform::CompositeT
+  -# OpenMesh::Subdivider::Uniform::CatmullClarkT
 -# Adaptive subdivision
   -# OpenMesh::Subdivider::Adaptive::CompositeT
 -# Simple subdivision
   -# OpenMesh::Subdivider::Uniform::LongestEdgeT
 
+\section Usage
+The subdividers directly work on an OpenMesh. The following example shows how to use them:
+
+\code
+  #include <OpenMesh/Tools/Subdivider/Uniform/CatmullClarkT.hh>
+
+  // Initialize subdivider
+  OpenMesh::Subdivider::Uniform::CatmullClarkT<PolyMesh> catmull;
+
+  // Execute 3 subdivision steps
+  catmull.attach(mesh_);
+  catmull( 3 );
+  catmull.detach();
+\endcode
+
 */
 
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