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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.
54 lines
1.7 KiB
C++
54 lines
1.7 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 "vector_area_matrix.h"
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#include <vector>
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// Bug in unsupported/Eigen/SparseExtra needs iostream first
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#include <iostream>
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#include <unsupported/Eigen/SparseExtra>
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//#include <igl/boundary_loop.h>
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#include <igl/boundary_facets.h>
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template <typename DerivedF, typename Scalar>
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IGL_INLINE void igl::vector_area_matrix(
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const Eigen::PlainObjectBase<DerivedF> & F,
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Eigen::SparseMatrix<Scalar>& A)
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{
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using namespace Eigen;
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using namespace std;
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// number of vertices
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const int n = F.maxCoeff()+1;
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MatrixXi E;
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boundary_facets(F,E);
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//Prepare a vector of triplets to set the matrix
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vector<Triplet<Scalar> > tripletList;
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tripletList.reserve(4*E.rows());
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for(int k = 0; k < E.rows(); k++)
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{
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int i = E(k,0);
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int j = E(k,1);
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tripletList.push_back(Triplet<Scalar>(i+n, j, -0.25));
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tripletList.push_back(Triplet<Scalar>(j, i+n, -0.25));
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tripletList.push_back(Triplet<Scalar>(i, j+n, 0.25));
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tripletList.push_back(Triplet<Scalar>(j+n, i, 0.25));
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}
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//Set A from triplets (Eigen will sum triplets with same coordinates)
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A.resize(n * 2, n * 2);
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A.setFromTriplets(tripletList.begin(), tripletList.end());
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}
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#ifdef IGL_STATIC_LIBRARY
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// Explicit template instantiation
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template void igl::vector_area_matrix<Eigen::Matrix<int, -1, -1, 0, -1, -1>, double>(Eigen::PlainObjectBase<Eigen::Matrix<int, -1, -1, 0, -1, -1> > const&, Eigen::SparseMatrix<double, 0, int>&);
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#endif
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