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https://github.com/SoftFever/OrcaSlicer.git
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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.
85 lines
3.9 KiB
C++
85 lines
3.9 KiB
C++
// This file is part of libigl, a simple c++ geometry processing library.
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//
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// Copyright (C) 2015 Alec Jacobson <alecjacobson@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 "crouzeix_raviart_massmatrix.h"
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#include "unique_simplices.h"
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#include "oriented_facets.h"
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#include "is_edge_manifold.h"
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#include "doublearea.h"
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#include "volume.h"
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#include <cassert>
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#include <vector>
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template <typename MT, typename DerivedV, typename DerivedF, typename DerivedE, typename DerivedEMAP>
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void igl::crouzeix_raviart_massmatrix(
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const Eigen::MatrixBase<DerivedV> & V,
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const Eigen::MatrixBase<DerivedF> & F,
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Eigen::SparseMatrix<MT> & M,
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Eigen::PlainObjectBase<DerivedE> & E,
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Eigen::PlainObjectBase<DerivedEMAP> & EMAP)
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{
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// All occurrences of directed "facets"
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Eigen::MatrixXi allE;
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oriented_facets(F,allE);
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Eigen::VectorXi _1;
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unique_simplices(allE,E,_1,EMAP);
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return crouzeix_raviart_massmatrix(V,F,E,EMAP,M);
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}
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template <typename MT, typename DerivedV, typename DerivedF, typename DerivedE, typename DerivedEMAP>
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void igl::crouzeix_raviart_massmatrix(
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const Eigen::MatrixBase<DerivedV> & V,
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const Eigen::MatrixBase<DerivedF> & F,
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const Eigen::MatrixBase<DerivedE> & E,
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const Eigen::MatrixBase<DerivedEMAP> & EMAP,
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Eigen::SparseMatrix<MT> & M)
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{
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using namespace Eigen;
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using namespace std;
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// Mesh should be edge-manifold (TODO: replace `is_edge_manifold` with
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// `is_facet_manifold`)
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assert(F.cols() != 3 || is_edge_manifold(F));
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// number of elements (triangles)
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const int m = F.rows();
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// Get triangle areas/volumes
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VectorXd TA;
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// Element simplex size
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const int ss = F.cols();
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switch(ss)
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{
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default:
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assert(false && "Unsupported simplex size");
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case 3:
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doublearea(V,F,TA);
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TA *= 0.5;
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break;
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case 4:
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volume(V,F,TA);
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break;
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}
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vector<Triplet<MT> > MIJV(ss*m);
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assert(EMAP.size() == m*ss);
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for(int f = 0;f<m;f++)
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{
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for(int c = 0;c<ss;c++)
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{
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MIJV[f+m*c] = Triplet<MT>(EMAP(f+m*c),EMAP(f+m*c),TA(f)/(double)(ss));
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}
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}
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M.resize(E.rows(),E.rows());
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M.setFromTriplets(MIJV.begin(),MIJV.end());
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}
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#ifdef IGL_STATIC_LIBRARY
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// Explicit template instantiation
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// generated by autoexplicit.sh
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template void igl::crouzeix_raviart_massmatrix<double, Eigen::Matrix<double, -1, -1, 0, -1, -1>, Eigen::Matrix<int, -1, -1, 0, -1, -1>, Eigen::Matrix<int, -1, -1, 0, -1, -1>, Eigen::Matrix<int, -1, 1, 0, -1, 1> >(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>&, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, -1, 0, -1, -1> >&, Eigen::PlainObjectBase<Eigen::Matrix<int, -1, 1, 0, -1, 1> >&);
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template void igl::crouzeix_raviart_massmatrix<double, Eigen::Matrix<double, -1, -1, 0, -1, -1>, Eigen::Matrix<int, -1, -1, 0, -1, -1>, Eigen::Matrix<int, -1, -1, 0, -1, -1>, Eigen::Matrix<int, -1, 1, 0, -1, 1> >(Eigen::MatrixBase<Eigen::Matrix<double, -1, -1, 0, -1, -1> > const&, Eigen::MatrixBase<Eigen::Matrix<int, -1, -1, 0, -1, -1> > const&, Eigen::MatrixBase<Eigen::Matrix<int, -1, -1, 0, -1, -1> > const&, Eigen::MatrixBase<Eigen::Matrix<int, -1, 1, 0, -1, 1> > const&, Eigen::SparseMatrix<double, 0, int>&);
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template void igl::crouzeix_raviart_massmatrix<float, Eigen::Matrix<float, -1, 3, 1, -1, 3>, Eigen::Matrix<unsigned int, -1, -1, 1, -1, -1>, Eigen::Matrix<int, -1, -1, 0, -1, -1>, Eigen::Matrix<int, -1, 1, 0, -1, 1> >(Eigen::MatrixBase<Eigen::Matrix<float, -1, 3, 1, -1, 3> > const&, Eigen::MatrixBase<Eigen::Matrix<unsigned int, -1, -1, 1, -1, -1> > const&, Eigen::MatrixBase<Eigen::Matrix<int, -1, -1, 0, -1, -1> > const&, Eigen::MatrixBase<Eigen::Matrix<int, -1, 1, 0, -1, 1> > const&, Eigen::SparseMatrix<float, 0, int>&);
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#endif
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