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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.
45 lines
1.4 KiB
C++
45 lines
1.4 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_GROUP_SUM_MATRIX_H
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#define IGL_GROUP_SUM_MATRIX_H
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#include "igl_inline.h"
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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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// GROUP_SUM_MATRIX Builds a matrix A such that A*V computes the sum of
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// vertices in each group specified by G
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//
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// group_sum_matrix(G,k,A);
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//
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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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// G #V list of group indices (0 to k-1) for each vertex, such that vertex i
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// is assigned to group G(i)
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// k #groups, good choice is max(G)+1
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// Outputs:
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// A #groups by #V sparse matrix such that A*V = group_sums
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//
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template <typename T>
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IGL_INLINE void group_sum_matrix(
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const Eigen::Matrix<int,Eigen::Dynamic,1> & G,
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const int k,
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Eigen::SparseMatrix<T>& A);
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// Wrapper with k = max(G)+1
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template <typename T>
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IGL_INLINE void group_sum_matrix(
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const Eigen::Matrix<int,Eigen::Dynamic,1> & G,
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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 "group_sum_matrix.cpp"
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#endif
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#endif
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