100 lines
3.7 KiB
C++
100 lines
3.7 KiB
C++
/****************************************************************************
|
|
* VCGLib o o *
|
|
* Visual and Computer Graphics Library o o *
|
|
* _ O _ *
|
|
* Copyright(C) 2014 \/)\/ *
|
|
* Visual Computing Lab /\/| *
|
|
* ISTI - Italian National Research Council | *
|
|
* \ *
|
|
* All rights reserved. *
|
|
* *
|
|
* This program is free software; you can redistribute it and/or modify *
|
|
* it under the terms of the GNU General Public License as published by *
|
|
* the Free Software Foundation; either version 2 of the License, or *
|
|
* (at your option) any later version. *
|
|
* *
|
|
* This program is distributed in the hope that it will be useful, *
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
|
|
* GNU General Public License (http://www.gnu.org/licenses/gpl.txt) *
|
|
* for more details. *
|
|
* *
|
|
****************************************************************************/
|
|
|
|
/* Optimizes given UV-mapping with
|
|
* [Least Square Conformal Maps]
|
|
* (minimizes angle distrotions).
|
|
*
|
|
* Needs:
|
|
* (-) per-vertex texture coords
|
|
* (-) some fixed boundary:
|
|
* Fixed vertices are the flagged ones.
|
|
* By default: (use fixedMask parameter to customize)
|
|
* BORDER or SELECTED verts are fixed.
|
|
*
|
|
* Example of usage:
|
|
* MyMesh m;
|
|
* vcg::tri::UpdateFlags< MyMesh >::VertexBorderFromNone( m );
|
|
* vcg::tri::OptimizeUV_LSCM( m );
|
|
*
|
|
*/
|
|
|
|
|
|
#include <igl/lscm.h>
|
|
#include <vcg/complex/algorithms/mesh_to_matrix.h>
|
|
|
|
namespace vcg{
|
|
namespace tri{
|
|
|
|
template<class MeshType >
|
|
void OptimizeUV_LSCM( MeshType& m ,
|
|
unsigned int fixedMask =
|
|
MeshType::VertexType::BORDER |
|
|
MeshType::VertexType::SELECTED
|
|
)
|
|
{
|
|
|
|
// check requirements
|
|
vcg::tri::VertexVectorHasPerVertexTexCoord( m.vert );
|
|
vcg::tri::VertexVectorHasPerVertexFlags( m.vert );
|
|
|
|
Eigen::MatrixXd V;
|
|
Eigen::MatrixXi F;
|
|
Eigen::VectorXi b;
|
|
Eigen::MatrixXd bc;
|
|
Eigen::MatrixXd V_uv;
|
|
|
|
vcg::tri::MeshToMatrix< MeshType >::GetTriMeshData( m, F, V );
|
|
|
|
// build fixed points data
|
|
int nFixed = 0;
|
|
for (int i=0; i<(int)m.vert.size(); i++) {
|
|
if (m.vert[i].Flags()&fixedMask) nFixed++;
|
|
}
|
|
|
|
// all fixed, nothing to do? get out to avoid crashes
|
|
if (nFixed == m.vert.size()) return;
|
|
|
|
b.resize(nFixed);
|
|
bc.resize(nFixed,2);
|
|
for (int i=0,k=0; i<(int)m.vert.size(); i++) {
|
|
if (m.vert[i].Flags()&fixedMask) {
|
|
b(k) = i;
|
|
bc(k,0) = m.vert[i].T().P()[0];
|
|
bc(k,1) = m.vert[i].T().P()[1];
|
|
k++;
|
|
}
|
|
}
|
|
|
|
// apply Least Square Conformal Maps
|
|
::igl::lscm(V,F,b,bc,V_uv);
|
|
|
|
// copy results back to mesh
|
|
for (int i=0; i<(int)m.vert.size(); i++) {
|
|
m.vert[i].T().P()[0] = V_uv(i,0);
|
|
m.vert[i].T().P()[1] = V_uv(i,1);
|
|
}
|
|
}
|
|
|
|
}} // namespaces
|