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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.
52 lines
1.5 KiB
C++
52 lines
1.5 KiB
C++
// This file is part of libigl, a simple c++ geometry processing library.
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//
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// Copyright (C) 2013 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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#ifndef IGL_ADJACENCY_MATRIX_H
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#define IGL_ADJACENCY_MATRIX_H
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#include "igl_inline.h"
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#define EIGEN_YES_I_KNOW_SPARSE_MODULE_IS_NOT_STABLE_YET
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#include <Eigen/Dense>
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#include <Eigen/Sparse>
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namespace igl
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{
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// Constructs the graph adjacency matrix of a given mesh (V,F)
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// Templates:
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// T should be a eigen sparse matrix primitive type like int or double
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// Inputs:
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// F #F by dim list of mesh simplices
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// Outputs:
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// A max(F) by max(F) cotangent matrix, each row i corresponding to V(i,:)
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//
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// Example:
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// // Mesh in (V,F)
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// Eigen::SparseMatrix<double> A;
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// adjacency_matrix(F,A);
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// // sum each row
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// SparseVector<double> Asum;
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// sum(A,1,Asum);
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// // Convert row sums into diagonal of sparse matrix
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// SparseMatrix<double> Adiag;
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// diag(Asum,Adiag);
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// // Build uniform laplacian
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// SparseMatrix<double> U;
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// U = A-Adiag;
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//
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// See also: edges, cotmatrix, diag
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template <typename DerivedF, typename T>
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IGL_INLINE void adjacency_matrix(
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const Eigen::MatrixBase<DerivedF> & F,
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Eigen::SparseMatrix<T>& A);
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}
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#ifndef IGL_STATIC_LIBRARY
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# include "adjacency_matrix.cpp"
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#endif
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#endif
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