ModEdgeLengthT_impl.hh 4.96 KB
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/* ========================================================================= *
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 *                                                                           *
 *                               OpenMesh                                    *
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 *           Copyright (c) 2001-2015, RWTH-Aachen University                 *
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 *           Department of Computer Graphics and Multimedia                  *
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 *                          All rights reserved.                             *
 *                            www.openmesh.org                               *
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 *                                                                           *
 *---------------------------------------------------------------------------*
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 * This file is part of OpenMesh.                                            *
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 *                                                                           *
 * ========================================================================= */
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/** \file ModEdgeLengthT_impl.hh
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 */

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

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#include "ModEdgeLengthT.hh"
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//== NAMESPACES ===============================================================

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namespace OpenMesh {
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namespace Decimater {

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

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

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

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

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

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

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
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    typename Mesh::Scalar edge_length = edge_length_ * static_cast<typename Mesh::Scalar>(_factor / this->error_tolerance_factor_);
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    set_edge_length(edge_length);
    this->error_tolerance_factor_ = _factor;
  }
}

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