CollapseInfoT.hh

Go to the documentation of this file.

/* ========================================================================= *
 *                                                                           *
 *                               OpenMesh                                    *
 *           Copyright (c) 2001-2022, RWTH-Aachen University                 *
 *           Department of Computer Graphics and Multimedia                  *
 *                          All rights reserved.                             *
 *                            www.openmesh.org                               *
 *                                                                           *
 *---------------------------------------------------------------------------*
 * This file is part of OpenMesh.                                            *
 *---------------------------------------------------------------------------*
 *                                                                           *
 * Redistribution and use in source and binary forms, with or without        *
 * modification, are permitted provided that the following conditions        *
 * are met:                                                                  *
 *                                                                           *
 * 1. Redistributions of source code must retain the above copyright notice, *
 *    this list of conditions and the following disclaimer.                  *
 *                                                                           *
 * 2. Redistributions in binary form must reproduce the above copyright      *
 *    notice, this list of conditions and the following disclaimer in the    *
 *    documentation and/or other materials provided with the distribution.   *
 *                                                                           *
 * 3. Neither the name of the copyright holder nor the names of its          *
 *    contributors may be used to endorse or promote products derived from   *
 *    this software without specific prior written permission.               *
 *                                                                           *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS       *
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED *
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A           *
 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER *
 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,  *
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,       *
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR        *
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF    *
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING      *
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS        *
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.              *
 *                                                                           *
 * ========================================================================= */
 
 
//=============================================================================
//
//  STRUCT CollpaseInfoT
//
//=============================================================================
#ifndef OPENMESH_DECIMATER_COLLAPSEINFOT_HH
#define OPENMESH_DECIMATER_COLLAPSEINFOT_HH
 
//== INCLUDES =================================================================
 
//== NAMESPACE ================================================================
 
namespace OpenMesh {
namespace Decimater {
 
//== CLASS DEFINITION =========================================================
 
template<class Mesh>
struct CollapseInfoT {
  public:
    CollapseInfoT(Mesh& _mesh, typename Mesh::HalfedgeHandle _heh);
 
    Mesh& mesh;
 
    typename Mesh::HalfedgeHandle v0v1; 
    typename Mesh::HalfedgeHandle v1v0; 
    typename Mesh::VertexHandle v0; 
    typename Mesh::VertexHandle v1; 
    typename Mesh::Point p0; 
    typename Mesh::Point p1; 
    typename Mesh::FaceHandle fl; 
    typename Mesh::FaceHandle fr; 
    typename Mesh::VertexHandle vl; 
    typename Mesh::VertexHandle vr; 
 
    typename Mesh::HalfedgeHandle vlv1, v0vl, vrv0, v1vr;
};
 
//-----------------------------------------------------------------------------
 
template<class Mesh>
inline CollapseInfoT<Mesh>::CollapseInfoT(Mesh& _mesh,
    typename Mesh::HalfedgeHandle _heh) :
    mesh(_mesh), v0v1(_heh), v1v0(_mesh.opposite_halfedge_handle(v0v1)), v0(
        _mesh.to_vertex_handle(v1v0)), v1(_mesh.to_vertex_handle(v0v1)), p0(
        _mesh.point(v0)), p1(_mesh.point(v1)), fl(_mesh.face_handle(v0v1)), fr(
        _mesh.face_handle(v1v0))
 
{
  // get vl
  if (fl.is_valid()) {
    vlv1 = mesh.next_halfedge_handle(v0v1);
    v0vl = mesh.next_halfedge_handle(vlv1);
    vl = mesh.to_vertex_handle(vlv1);
    vlv1 = mesh.opposite_halfedge_handle(vlv1);
    v0vl = mesh.opposite_halfedge_handle(v0vl);
  }
 
  // get vr
  if (fr.is_valid()) {
    vrv0 = mesh.next_halfedge_handle(v1v0);
    v1vr = mesh.next_halfedge_handle(vrv0);
    vr = mesh.to_vertex_handle(vrv0);
    vrv0 = mesh.opposite_halfedge_handle(vrv0);
    v1vr = mesh.opposite_halfedge_handle(v1vr);
  }
}
 
//=============================================================================
}// END_NS_DECIMATER
} // END_NS_OPENMESH
//=============================================================================
#endif // OPENMESH_DECIMATER_COLLAPSEINFOT_HH defined
//=============================================================================