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Merged branch 'dev_native' into lm_sla_supports_auto

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Added igl library files
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Lukas Matena 2018-10-26 15:45:52 +02:00
commit 7681d00ee5
2865 changed files with 142806 additions and 22325 deletions
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src/igl/hessian_energy.cpp Normal file
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// This file is part of libigl, a simple c++ geometry processing library.
//
// Copyright (C) 2017 Alec Jacobson <alecjacobson@gmail.com>
// and Oded Stein <oded.stein@columbia.edu>
//
// This Source Code Form is subject to the terms of the Mozilla Public License
// v. 2.0. If a copy of the MPL was not distributed with this file, You can
// obtain one at http://mozilla.org/MPL/2.0/.
#include "hessian_energy.h"
#include <vector>
#include "hessian.h"
#include "massmatrix.h"
#include "boundary_loop.h"
template <typename DerivedV, typename DerivedF, typename Scalar>
IGL_INLINE void igl::hessian_energy(
const Eigen::MatrixBase<DerivedV> & V,
const Eigen::MatrixBase<DerivedF> & F,
Eigen::SparseMatrix<Scalar>& Q)
{
typedef typename DerivedV::Scalar denseScalar;
typedef typename Eigen::Matrix<denseScalar, Eigen::Dynamic, 1> VecXd;
typedef typename Eigen::SparseMatrix<Scalar> SparseMat;
typedef typename Eigen::DiagonalMatrix
<Scalar, Eigen::Dynamic, Eigen::Dynamic> DiagMat;
int dim = V.cols();
assert((dim==2 || dim==3) &&
"The dimension of the vertices should be 2 or 3");
SparseMat M;
igl::massmatrix(V,F,igl::MASSMATRIX_TYPE_VORONOI,M);
//Kill non-interior DOFs
VecXd Mint = M.diagonal();
std::vector<std::vector<int> > bdryLoop;
igl::boundary_loop(DerivedF(F),bdryLoop);
for(const std::vector<int>& loop : bdryLoop)
for(const int& bdryVert : loop)
Mint(bdryVert) = 0.;
//Invert Mint
for(int i=0; i<Mint.rows(); ++i)
if(Mint(i) > 0)
Mint(i) = 1./Mint(i);
//Repeat Mint to form diaginal matrix
DiagMat stackedMinv = Mint.replicate(dim*dim,1).asDiagonal();
//Compute squared Hessian
SparseMat H;
igl::hessian(V,F,H);
Q = H.transpose()*stackedMinv*H;
}
#ifdef IGL_STATIC_LIBRARY
// Explicit template instantiation
template void igl::hessian_energy<Eigen::Matrix<double, -1, -1, 0, -1, -1>, Eigen::Matrix<int, -1, -1, 0, -1, -1>, double>(Eigen::MatrixBase<Eigen::Matrix<double, -1, -1, 0, -1, -1> > const&, Eigen::MatrixBase<Eigen::Matrix<int, -1, -1, 0, -1, -1> > const&, Eigen::SparseMatrix<double, 0, int>&);
#endif