First checkin for OpenMesh 2.0

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

Tools/Utils/StripifierT.hh

@@ -0,0 +1,141 @@
+//=============================================================================
+//                                                                            
+//                               OpenMesh                                     
+//      Copyright (C) 2001-2003 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) $
+//                                                                            
+//=============================================================================
+
+//=============================================================================
+//
+//  CLASS StripifierT
+//
+//=============================================================================
+
+
+#ifndef OPENMESH_STRIPIFIERT_HH
+#define OPENMESH_STRIPIFIERT_HH
+
+
+//== INCLUDES =================================================================
+
+#include <vector>
+#include <OpenMesh/Core/Utils/Property.hh>
+
+
+//== FORWARDDECLARATIONS ======================================================
+
+
+//== NAMESPACES ===============================================================
+
+namespace OpenMesh {
+
+
+//== CLASS DEFINITION =========================================================
+
+
+
+	      
+/** \class StripifierT StripifierT.hh <OpenMesh/Tools/Utils/StripifierT.hh>
+    This class decomposes a triangle mesh into several triangle strips.
+*/
+
+template <class Mesh>
+class StripifierT
+{
+public:
+   
+  typedef unsigned int                      Index;
+  typedef std::vector<Index>                Strip;
+  typedef typename Strip::const_iterator    IndexIterator;
+  typedef std::vector<Strip>                Strips;
+  typedef typename Strips::const_iterator   StripsIterator;
+
+
+  /// Default constructor
+  StripifierT(Mesh& _mesh) : mesh_(_mesh) {}
+
+  /// Destructor
+  ~StripifierT() {}
+
+
+  /// Compute triangle strips, returns number of strips
+  unsigned int stripify();
+
+  /// delete all strips
+  void clear() { Strips().swap(strips_); }
+
+  /// returns number of strips
+  unsigned int n_strips() const { return strips_.size(); }
+
+  /// are strips computed?
+  bool is_valid() const { return !strips_.empty(); }
+
+  /// Access strips
+  StripsIterator begin() const { return strips_.begin(); }
+  /// Access strips
+  StripsIterator end()   const { return strips_.end(); }
+
+
+private:
+
+  typedef std::vector<typename Mesh::FaceHandle>  FaceHandles;
+
+
+  /// this method does the main work
+  void build_strips();
+
+  /// build a strip from a given halfedge (in both directions)
+  void build_strip(typename Mesh::HalfedgeHandle _start_hh,
+		   Strip& _strip,
+		   FaceHandles& _faces);
+
+  FPropHandleT<bool>::reference  processed(typename Mesh::FaceHandle _fh) {
+    return mesh_.property(processed_, _fh);
+  }
+  FPropHandleT<bool>::reference  used(typename Mesh::FaceHandle _fh) {
+    return mesh_.property(used_, _fh);
+  }
+
+
+
+private:
+
+  Mesh&                mesh_;
+  Strips               strips_;
+  FPropHandleT<bool>   processed_, used_;
+};
+
+
+//=============================================================================
+} // namespace OpenMesh
+//=============================================================================
+#if defined(OM_INCLUDE_TEMPLATES) && !defined(OPENMESH_STRIPIFIERT_C)
+#define OPENMESH_STRIPIFIERT_TEMPLATES
+#include "StripifierT.cc"
+#endif
+//=============================================================================
+#endif // OPENMESH_STRIPIFIERT_HH defined
+//=============================================================================