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2ae2672ee9
Fixing dep build script on Windows and removing some warnings. Use bundled igl by default. Not building with the dependency scripts if not explicitly stated. This way, it will stay in Fix the libigl patch to include C source files in header only mode.
72 lines
1.9 KiB
C++
72 lines
1.9 KiB
C++
// This file is part of libigl, a simple c++ geometry processing library.
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//
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// Copyright (C) 2014 Daniele Panozzo <daniele.panozzo@gmail.com>
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//
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// This Source Code Form is subject to the terms of the Mozilla Public License
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// v. 2.0. If a copy of the MPL was not distributed with this file, You can
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// obtain one at http://mozilla.org/MPL/2.0/.
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#include "lscm.h"
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#include "vector_area_matrix.h"
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#include "cotmatrix.h"
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#include "repdiag.h"
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#include "min_quad_with_fixed.h"
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#include <iostream>
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IGL_INLINE bool igl::lscm(
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const Eigen::MatrixXd& V,
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const Eigen::MatrixXi& F,
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const Eigen::VectorXi& b,
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const Eigen::MatrixXd& bc,
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Eigen::MatrixXd & V_uv)
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{
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using namespace Eigen;
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using namespace std;
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// Assemble the area matrix (note that A is #Vx2 by #Vx2)
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SparseMatrix<double> A;
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igl::vector_area_matrix(F,A);
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// Assemble the cotan laplacian matrix
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SparseMatrix<double> L;
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igl::cotmatrix(V,F,L);
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SparseMatrix<double> L_flat;
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repdiag(L,2,L_flat);
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VectorXi b_flat(b.size()*bc.cols(),1);
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VectorXd bc_flat(bc.size(),1);
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for(int c = 0;c<bc.cols();c++)
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{
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b_flat.block(c*b.size(),0,b.rows(),1) = c*V.rows() + b.array();
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bc_flat.block(c*bc.rows(),0,bc.rows(),1) = bc.col(c);
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}
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// Minimize the LSCM energy
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SparseMatrix<double> Q = -L_flat + 2.*A;
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const VectorXd B_flat = VectorXd::Zero(V.rows()*2);
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igl::min_quad_with_fixed_data<double> data;
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if(!igl::min_quad_with_fixed_precompute(Q,b_flat,SparseMatrix<double>(),true,data))
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{
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return false;
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}
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MatrixXd W_flat;
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if(!min_quad_with_fixed_solve(data,B_flat,bc_flat,VectorXd(),W_flat))
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{
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return false;
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}
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assert(W_flat.rows() == V.rows()*2);
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V_uv.resize(V.rows(),2);
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for (unsigned i=0;i<V_uv.cols();++i)
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{
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V_uv.col(V_uv.cols()-i-1) = W_flat.block(V_uv.rows()*i,0,V_uv.rows(),1);
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}
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return true;
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}
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#ifdef IGL_STATIC_LIBRARY
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// Explicit template instantiation
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#endif
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