fd4bcb39ea
git-svn-id: http://www.openmesh.org/svnrepo/OpenMesh/trunk@1258 fdac6126-5c0c-442c-9429-916003d36597
228 lines
8.5 KiB
C++
228 lines
8.5 KiB
C++
/* ========================================================================= *
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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. *
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* www.openmesh.org *
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* *
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*---------------------------------------------------------------------------*
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* This file is part of OpenMesh. *
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*---------------------------------------------------------------------------*
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* *
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* Redistribution and use in source and binary forms, with or without *
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* modification, are permitted provided that the following conditions *
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* are met: *
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* *
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* 1. Redistributions of source code must retain the above copyright notice, *
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* this list of conditions and the following disclaimer. *
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* *
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* 2. Redistributions in binary form must reproduce the above copyright *
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* notice, this list of conditions and the following disclaimer in the *
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* documentation and/or other materials provided with the distribution. *
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* *
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* 3. Neither the name of the copyright holder nor the names of its *
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* contributors may be used to endorse or promote products derived from *
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* this software without specific prior written permission. *
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* *
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS *
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED *
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A *
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* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER *
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* OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, *
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, *
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR *
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF *
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING *
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS *
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. *
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* *
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* ========================================================================= */
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/*===========================================================================*\
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* *
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* $Revision$ *
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* $Date$ *
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* *
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\*===========================================================================*/
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/** \file LaplaceSmootherT.cc
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*/
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//=============================================================================
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//
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// CLASS LaplaceSmootherT - IMPLEMENTATION
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//
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//=============================================================================
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#define OPENMESH_LAPLACE_SMOOTHERT_C
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//== INCLUDES =================================================================
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#include <OpenMesh/Tools/Smoother/LaplaceSmootherT.hh>
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//== NAMESPACES ===============================================================
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namespace OpenMesh {
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namespace Smoother {
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//== IMPLEMENTATION ==========================================================
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template <class Mesh>
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LaplaceSmootherT<Mesh>::
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LaplaceSmootherT(Mesh& _mesh)
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: SmootherT<Mesh>(_mesh)
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{
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// custom properties
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Base::mesh_.add_property(vertex_weights_);
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Base::mesh_.add_property(edge_weights_);
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}
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//-----------------------------------------------------------------------------
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template <class Mesh>
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LaplaceSmootherT<Mesh>::
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~LaplaceSmootherT()
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{
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// free custom properties
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Base::mesh_.remove_property(vertex_weights_);
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Base::mesh_.remove_property(edge_weights_);
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}
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//-----------------------------------------------------------------------------
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template <class Mesh>
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void
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LaplaceSmootherT<Mesh>::
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initialize(Component _comp, Continuity _cont)
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{
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SmootherT<Mesh>::initialize(_comp, _cont);
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// calculate weights
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switch (_comp)
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{
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case Base::Tangential:
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compute_weights(UniformWeighting);
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break;
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case Base::Normal:
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compute_weights(CotWeighting);
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break;
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case Base::Tangential_and_Normal:
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compute_weights(UniformWeighting);
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break;
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}
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}
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//-----------------------------------------------------------------------------
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template <class Mesh>
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void
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LaplaceSmootherT<Mesh>::
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compute_weights(LaplaceWeighting _weighting)
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{
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typename Mesh::VertexIter v_it, v_end(Base::mesh_.vertices_end());
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typename Mesh::EdgeIter e_it, e_end(Base::mesh_.edges_end());
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typename Mesh::HalfedgeHandle heh0, heh1, heh2;
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typename Mesh::VertexHandle v0, v1;
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const typename Mesh::Point *p0, *p1, *p2;
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typename Mesh::Normal d0, d1;
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typename Mesh::Scalar weight, lb(-1.0), ub(1.0);
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// init vertex weights
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for (v_it=Base::mesh_.vertices_begin(); v_it!=v_end; ++v_it)
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Base::mesh_.property(vertex_weights_, *v_it) = 0.0;
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switch (_weighting)
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{
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// Uniform weighting
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case UniformWeighting:
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{
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for (e_it=Base::mesh_.edges_begin(); e_it!=e_end; ++e_it)
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{
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heh0 = Base::mesh_.halfedge_handle(*e_it, 0);
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heh1 = Base::mesh_.halfedge_handle(*e_it, 1);
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v0 = Base::mesh_.to_vertex_handle(heh0);
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v1 = Base::mesh_.to_vertex_handle(heh1);
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Base::mesh_.property(edge_weights_, *e_it) = 1.0;
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Base::mesh_.property(vertex_weights_, v0) += 1.0;
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Base::mesh_.property(vertex_weights_, v1) += 1.0;
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}
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break;
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}
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// Cotangent weighting
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case CotWeighting:
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{
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for (e_it=Base::mesh_.edges_begin(); e_it!=e_end; ++e_it)
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{
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weight = 0.0;
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heh0 = Base::mesh_.halfedge_handle(*e_it, 0);
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v0 = Base::mesh_.to_vertex_handle(heh0);
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p0 = &Base::mesh_.point(v0);
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heh1 = Base::mesh_.halfedge_handle(*e_it, 1);
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v1 = Base::mesh_.to_vertex_handle(heh1);
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p1 = &Base::mesh_.point(v1);
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heh2 = Base::mesh_.next_halfedge_handle(heh0);
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p2 = &Base::mesh_.point(Base::mesh_.to_vertex_handle(heh2));
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d0 = (*p0 - *p2); d0.normalize();
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d1 = (*p1 - *p2); d1.normalize();
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weight += static_cast<typename Mesh::Scalar>(1.0) / tan(acos(std::max(lb, std::min(ub, dot(d0,d1) ))));
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heh2 = Base::mesh_.next_halfedge_handle(heh1);
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p2 = &Base::mesh_.point(Base::mesh_.to_vertex_handle(heh2));
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d0 = (*p0 - *p2); d0.normalize();
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d1 = (*p1 - *p2); d1.normalize();
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weight += static_cast<typename Mesh::Scalar>(1.0) / tan(acos(std::max(lb, std::min(ub, dot(d0,d1) ))));
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Base::mesh_.property(edge_weights_, *e_it) = weight;
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Base::mesh_.property(vertex_weights_, v0) += weight;
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Base::mesh_.property(vertex_weights_, v1) += weight;
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}
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break;
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}
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}
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// invert vertex weights:
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// before: sum of edge weights
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// after: one over sum of edge weights
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for (v_it=Base::mesh_.vertices_begin(); v_it!=v_end; ++v_it)
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{
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weight = Base::mesh_.property(vertex_weights_, *v_it);
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if (weight)
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Base::mesh_.property(vertex_weights_, *v_it) = static_cast<typename Mesh::Scalar>(1.0) / weight;
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}
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}
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//=============================================================================
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} // namespace Smoother
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} // namespace OpenMesh
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//=============================================================================
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