Changed OpenMesh directory structure

git-svn-id: http://www.openmesh.org/svnrepo/OpenMesh/trunk@106 fdac6126-5c0c-442c-9429-916003d36597

src/OpenMesh/Core/Mesh/Handles.hh

@@ -0,0 +1,134 @@
+//=============================================================================
+//                                                                            
+//                               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.                 
+//                                                                            
+//-----------------------------------------------------------------------------
+//                                                                            
+//   $Revision$
+//   $Date$
+//                                                                            
+//=============================================================================
+
+#ifndef OPENMESH_HANDLES_HH
+#define OPENMESH_HANDLES_HH
+
+
+//== INCLUDES =================================================================
+
+#include <OpenMesh/Core/System/config.h>
+#include <iostream>
+
+
+//== NAMESPACES ===============================================================
+
+namespace OpenMesh {
+
+//== CLASS DEFINITION =========================================================
+
+
+/// Base class for all handle types
+class BaseHandle
+{ 
+public:
+  
+  explicit BaseHandle(int _idx=-1) : idx_(_idx) {}
+
+  /// Get the underlying index of this handle
+  int idx() const { return idx_; }
+
+  /// The handle is valid iff the index is not equal to -1.
+  bool is_valid() const { return idx_ != -1; }
+
+  /// reset handle to be invalid
+  void reset() { idx_=-1; }
+  /// reset handle to be invalid
+  void invalidate() { idx_ = -1; }
+
+  bool operator==(const BaseHandle& _rhs) const { 
+    return idx_ == _rhs.idx_; 
+  }
+
+  bool operator!=(const BaseHandle& _rhs) const { 
+    return idx_ != _rhs.idx_; 
+  }
+
+  bool operator<(const BaseHandle& _rhs) const { 
+    return idx_ < _rhs.idx_; 
+  }
+
+
+  // this is to be used only by the iterators
+  void __increment() { ++idx_; }
+  void __decrement() { --idx_; }
+
+
+private:
+
+  int idx_; 
+};
+
+
+//-----------------------------------------------------------------------------
+
+/// Write handle \c _hnd to stream \c _os
+inline std::ostream& operator<<(std::ostream& _os, const BaseHandle& _hnd) 
+{
+  return (_os << _hnd.idx());
+}
+
+
+//-----------------------------------------------------------------------------
+
+
+/// Handle for a vertex entity
+struct VertexHandle : public BaseHandle
+{
+  explicit VertexHandle(int _idx=-1) : BaseHandle(_idx) {}
+};
+
+
+/// Handle for a halfedge entity
+struct HalfedgeHandle : public BaseHandle
+{
+  explicit HalfedgeHandle(int _idx=-1) : BaseHandle(_idx) {}
+};
+
+
+/// Handle for a edge entity
+struct EdgeHandle : public BaseHandle
+{
+  explicit EdgeHandle(int _idx=-1) : BaseHandle(_idx) {}
+};
+
+
+/// Handle for a face entity
+struct FaceHandle : public BaseHandle
+{
+  explicit FaceHandle(int _idx=-1) : BaseHandle(_idx) {}
+};
+
+
+//=============================================================================
+} // namespace OpenMesh
+//=============================================================================
+#endif // OPENMESH_HANDLES_HH
+//=============================================================================