First checkin for OpenMesh 2.0

git-svn-id: http://www.openmesh.org/svnrepo/OpenMesh/trunk@2 fdac6126-5c0c-442c-9429-916003d36597

Tools/Subdivider/Uniform/CompositeSqrt3T.hh

@@ -0,0 +1,135 @@
+//=============================================================================
+//                                                                            
+//                               OpenMesh                                     
+//        Copyright (C) 2003 by Computer Graphics Group, RWTH Aachen          
+//                           www.openmesh.org                                 
+//                                                                            
+//-----------------------------------------------------------------------------
+//                                                                            
+//                                License                                     
+//                                                                            
+//   This library is free software; you can redistribute it and/or modify it 
+//   under the terms of the GNU Lesser General Public License as published   
+//   by the Free Software Foundation, version 2.1.                           
+//                                                                             
+//   This library is distributed in the hope that it will be useful, but       
+//   WITHOUT ANY WARRANTY; without even the implied warranty of                
+//   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU         
+//   Lesser General Public License for more details.                           
+//                                                                            
+//   You should have received a copy of the GNU Lesser General Public          
+//   License along with this library; if not, write to the Free Software       
+//   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.                 
+//                                                                            
+//-----------------------------------------------------------------------------
+//                                                                            
+//   $Revision: 1802 $
+//   $Date: 2008-05-19 11:55:07 +0200 (Mo, 19. Mai 2008) $
+//                                                                            
+//=============================================================================
+
+/** \file CompositeSqrt3T.hh
+    
+ */
+
+//=============================================================================
+//
+//  CLASS SQRT3T
+//
+//=============================================================================
+
+#ifndef OPENMESH_SUBDIVIDER_UNIFORM_COMPOSITESQRT3T_HH
+#define OPENMESH_SUBDIVIDER_UNIFORM_COMPOSITESQRT3T_HH
+
+
+//== INCLUDES =================================================================
+
+#include "Composite/CompositeT.hh"
+#include "Composite/CompositeTraits.hh"
+
+
+//== NAMESPACE ================================================================
+
+namespace OpenMesh   { // BEGIN_NS_OPENMESH
+namespace Subdivider { // BEGIN_NS_DECIMATER
+namespace Uniform    { // BEGIN_NS_UNIFORM
+
+
+//== CLASS DEFINITION =========================================================
+
+/** Uniform composite sqrt(3) subdivision algorithm
+ */
+template <typename MeshType, typename RealType=float>
+class CompositeSqrt3T : public CompositeT<MeshType, RealType>
+{
+public:
+
+   typedef CompositeT<MeshType, RealType> Inherited;
+
+public:
+
+  CompositeSqrt3T() : Inherited() {};
+  CompositeSqrt3T(MeshType& _mesh) : Inherited(_mesh) {};
+  ~CompositeSqrt3T() {}
+
+public:
+   
+  const char *name() const { return "Uniform Composite Sqrt3"; }
+
+protected: // inherited interface
+
+  void apply_rules(void)  
+  {
+    Inherited::Tvv3(); 
+    Inherited::VF(); 
+    Inherited::FF(); 
+    Inherited::FVc(coeffs_); 
+  }
+
+protected:
+   
+  typedef typename Inherited::Coeff Coeff;
+
+  /** Helper class
+   *  \internal
+   */
+  struct FVCoeff : public Coeff 
+  {
+    FVCoeff() : Coeff() { init(50); }
+
+    void init(size_t _max_valence)
+    {
+      weights_.resize(_max_valence);
+      std::generate(weights_.begin(), 
+                    weights_.end(), compute_weight() );
+    }
+    
+    double operator()(size_t _valence) { return weights_[_valence]; }
+
+  /** \internal
+   */
+    struct compute_weight 
+    {
+      compute_weight() : val_(0) { }
+
+      double operator()(void) // sqrt(3) weights for non-boundary vertices
+      { 
+        return 2.0/3.0 * (cos(2.0*M_PI/val_++)+1.0); 
+      }
+      size_t val_;
+    };
+
+    std::vector<double> weights_;
+    
+  } coeffs_;
+
+};
+
+
+//=============================================================================
+} // END_NS_UNIFORM
+} // END_NS_SUBDIVIDER
+} // END_NS_OPENMESH
+//=============================================================================
+#endif // OPENMESH_SUBDIVIDER_UNIFORM_COMPOSITESQRT3T_HH defined
+//=============================================================================