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/*===========================================================================*\
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 *   $Revision$                                                        *
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 \*===========================================================================*/

/** \file ModEdgeLengthT.cc
 */

//=============================================================================
//
//  CLASS ModEdgeLengthT - IMPLEMENTATION
//
//=============================================================================
#define OPENMESH_DECIMATER_MODEDGELENGTHT_C

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

#include "ModEdgeLengthT.hh"

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

namespace OpenMesh {
namespace Decimater {

//== IMPLEMENTATION ==========================================================

template<class MeshT>
ModEdgeLengthT<MeshT>::ModEdgeLengthT(MeshT &_mesh, float _edge_length,
    bool _is_binary) :
    Base(_mesh, _is_binary), mesh_(Base::mesh()) {
  set_edge_length(_edge_length);
}

//-----------------------------------------------------------------------------

template<class MeshT>
float ModEdgeLengthT<MeshT>::collapse_priority(const CollapseInfo& _ci) {
  typename Mesh::Scalar sqr_length = (_ci.p0 - _ci.p1).sqrnorm();

  return ( (sqr_length <= sqr_edge_length_) ? sqr_length : float(Base::ILLEGAL_COLLAPSE));
}

//-----------------------------------------------------------------------------

template<class MeshT>
void ModEdgeLengthT<MeshT>::set_error_tolerance_factor(double _factor) {
  if (_factor >= 0.0 && _factor <= 1.0) {
    // the smaller the factor, the smaller edge_length_ gets
    // thus creating a stricter constraint
    // division by error_tolerance_factor_ is for normalization
    typename Mesh::Scalar edge_length = edge_length_ * static_cast<typename Mesh::Scalar>(_factor / this->error_tolerance_factor_);
    set_edge_length(edge_length);
    this->error_tolerance_factor_ = _factor;
  }
}

//=============================================================================
}
}
//=============================================================================
