Loading...
Searching...
No Matches
LaplaceSmootherT_impl.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. *
* *
* ========================================================================= */
//=============================================================================
//
// CLASS LaplaceSmootherT - IMPLEMENTATION
//
//=============================================================================
#define OPENMESH_LAPLACE_SMOOTHERT_C
//== INCLUDES =================================================================
#include <OpenMesh/Tools/Smoother/LaplaceSmootherT.hh>
//== NAMESPACES ===============================================================
namespace OpenMesh {
namespace Smoother {
//== IMPLEMENTATION ==========================================================
template <class Mesh>
LaplaceSmootherT<Mesh>::
LaplaceSmootherT(Mesh& _mesh)
: SmootherT<Mesh>(_mesh)
{
// custom properties
Base::mesh_.add_property(vertex_weights_);
Base::mesh_.add_property(edge_weights_);
}
//-----------------------------------------------------------------------------
template <class Mesh>
LaplaceSmootherT<Mesh>::
~LaplaceSmootherT()
{
// free custom properties
Base::mesh_.remove_property(vertex_weights_);
Base::mesh_.remove_property(edge_weights_);
}
//-----------------------------------------------------------------------------
template <class Mesh>
void
LaplaceSmootherT<Mesh>::
initialize(Component _comp, Continuity _cont)
{
SmootherT<Mesh>::initialize(_comp, _cont);
// calculate weights
switch (_comp)
{
case Base::Tangential:
compute_weights(UniformWeighting);
break;
case Base::Normal:
compute_weights(CotWeighting);
break;
case Base::Tangential_and_Normal:
compute_weights(UniformWeighting);
break;
}
}
//-----------------------------------------------------------------------------
template <class Mesh>
void
LaplaceSmootherT<Mesh>::
compute_weights(LaplaceWeighting _weighting)
{
typename Mesh::VertexIter v_it, v_end(Base::mesh_.vertices_end());
typename Mesh::EdgeIter e_it, e_end(Base::mesh_.edges_end());
typename Mesh::HalfedgeHandle heh0, heh1, heh2;
typename Mesh::VertexHandle v0, v1;
typename Mesh::Normal d0, d1;
typename Mesh::Scalar weight, lb(-1.0), ub(1.0);
// init vertex weights
for (v_it=Base::mesh_.vertices_begin(); v_it!=v_end; ++v_it)
Base::mesh_.property(vertex_weights_, *v_it) = 0.0;
switch (_weighting)
{
// Uniform weighting
case UniformWeighting:
{
for (e_it=Base::mesh_.edges_begin(); e_it!=e_end; ++e_it)
{
heh0 = Base::mesh_.halfedge_handle(*e_it, 0);
heh1 = Base::mesh_.halfedge_handle(*e_it, 1);
v0 = Base::mesh_.to_vertex_handle(heh0);
v1 = Base::mesh_.to_vertex_handle(heh1);
Base::mesh_.property(edge_weights_, *e_it) = 1.0;
Base::mesh_.property(vertex_weights_, v0) += 1.0;
Base::mesh_.property(vertex_weights_, v1) += 1.0;
}
break;
}
// Cotangent weighting
case CotWeighting:
{
for (e_it=Base::mesh_.edges_begin(); e_it!=e_end; ++e_it)
{
const typename Mesh::Point *p0, *p1, *p2;
weight = 0.0;
heh0 = Base::mesh_.halfedge_handle(*e_it, 0);
v0 = Base::mesh_.to_vertex_handle(heh0);
p0 = &Base::mesh_.point(v0);
heh1 = Base::mesh_.halfedge_handle(*e_it, 1);
v1 = Base::mesh_.to_vertex_handle(heh1);
p1 = &Base::mesh_.point(v1);
heh2 = Base::mesh_.next_halfedge_handle(heh0);
p2 = &Base::mesh_.point(Base::mesh_.to_vertex_handle(heh2));
d0 = (*p0 - *p2); d0.normalize();
d1 = (*p1 - *p2); d1.normalize();
weight += static_cast<typename Mesh::Scalar>(1.0) / tan(acos(std::max(lb, std::min(ub, dot(d0,d1) ))));
heh2 = Base::mesh_.next_halfedge_handle(heh1);
p2 = &Base::mesh_.point(Base::mesh_.to_vertex_handle(heh2));
d0 = (*p0 - *p2); d0.normalize();
d1 = (*p1 - *p2); d1.normalize();
weight += static_cast<typename Mesh::Scalar>(1.0) / tan(acos(std::max(lb, std::min(ub, dot(d0,d1) ))));
Base::mesh_.property(edge_weights_, *e_it) = weight;
Base::mesh_.property(vertex_weights_, v0) += weight;
Base::mesh_.property(vertex_weights_, v1) += weight;
}
break;
}
}
// invert vertex weights:
// before: sum of edge weights
// after: one over sum of edge weights
for (v_it=Base::mesh_.vertices_begin(); v_it!=v_end; ++v_it)
{
weight = Base::mesh_.property(vertex_weights_, *v_it);
if (weight)
Base::mesh_.property(vertex_weights_, *v_it) = static_cast<typename Mesh::Scalar>(1.0) / weight;
}
}
//=============================================================================
} // namespace Smoother
} // namespace OpenMesh
//=============================================================================
LaplaceSmootherT.hh
OpenMesh
Contains all the mesh ingredients like the polygonal mesh, the triangle mesh, different mesh kernels ...
Definition MeshItems.hh:59
OpenMesh::PolyMeshT::VertexHandle
Kernel::VertexHandle VertexHandle
Handle for referencing the corresponding item.
Definition PolyMeshT.hh:136
OpenMesh::PolyMeshT::Scalar
Kernel::Scalar Scalar
Scalar type.
Definition PolyMeshT.hh:110
OpenMesh::PolyMeshT::Normal
Kernel::Normal Normal
Normal type.
Definition PolyMeshT.hh:114
OpenMesh::PolyMeshT::HalfedgeHandle
Kernel::HalfedgeHandle HalfedgeHandle
Scalar type.
Definition PolyMeshT.hh:137
OpenMesh::PolyMeshT::EdgeIter
Kernel::EdgeIter EdgeIter
Scalar type.
Definition PolyMeshT.hh:145
OpenMesh::PolyMeshT::Point
Kernel::Point Point
Coordinate type.
Definition PolyMeshT.hh:112
OpenMesh::PolyMeshT::VertexIter
Kernel::VertexIter VertexIter
Scalar type.
Definition PolyMeshT.hh:143