/*===========================================================================*\
 *                                                                           *
 *                               OpenMesh                                    *
 *      Copyright (C) 2001-2012 by Computer Graphics Group, RWTH Aachen      *
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 *  This file is part of OpenMesh.                                           *
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 *  GNU Lesser General Public License. This exception does not however       *
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\*===========================================================================*/ 

/*===========================================================================*\
 *                                                                           *             
 *   $Revision: 736 $                                                         *
 *   $Date: 2012-10-08 09:30:49 +0200 (Mo, 08 Okt 2012) $                   *
 *                                                                           *
\*===========================================================================*/

/** \file LaplaceSmootherT.hh
    
 */

//=============================================================================
//
//  CLASS LaplaceSmootherT
//
//=============================================================================

#ifndef OPENMESH_LAPLACE_SMOOTHERT_HH
#define OPENMESH_LAPLACE_SMOOTHERT_HH



//== INCLUDES =================================================================

#include <OpenMesh/Tools/Smoother/SmootherT.hh>


//== NAMESPACES ===============================================================

namespace OpenMesh {
namespace Smoother {

//== CLASS DEFINITION =========================================================

/// Laplacian Smoothing.      
template <class Mesh>
class LaplaceSmootherT : public SmootherT<Mesh>
{
private:
  typedef SmootherT<Mesh>                   Base;
public:

  typedef typename SmootherT<Mesh>::Component     Component;
  typedef typename SmootherT<Mesh>::Continuity    Continuity;
  typedef typename SmootherT<Mesh>::Scalar        Scalar;
  typedef typename SmootherT<Mesh>::VertexHandle  VertexHandle;
  typedef typename SmootherT<Mesh>::EdgeHandle    EdgeHandle;
  

  LaplaceSmootherT( Mesh& _mesh );
  virtual ~LaplaceSmootherT();


  void initialize(Component _comp, Continuity _cont);


protected:

  // misc helpers

  Scalar weight(VertexHandle _vh) const 
  { return Base::mesh_.property(vertex_weights_, _vh); }

  Scalar weight(EdgeHandle _eh) const 
  { return Base::mesh_.property(edge_weights_, _eh); }


private:

  enum LaplaceWeighting { UniformWeighting, CotWeighting };
  void compute_weights(LaplaceWeighting _mode);


  OpenMesh::VPropHandleT<Scalar>  vertex_weights_;
  OpenMesh::EPropHandleT<Scalar>  edge_weights_;
};


//=============================================================================
} // namespace Smoother
} // namespace OpenMesh
//=============================================================================
#if defined(OM_INCLUDE_TEMPLATES) && !defined(OPENMESH_LAPLACE_SMOOTHERT_C)
#define OPENMESH_LAPLACE_SMOOTHERT_TEMPLATES
#include "LaplaceSmootherT.cc"
#endif
//=============================================================================
#endif // OPENMESH_LAPLACE_SMOOTHERT_HH defined
//=============================================================================

