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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.
58 lines
2.1 KiB
C++
58 lines
2.1 KiB
C++
// This file is part of libigl, a simple c++ geometry processing library.
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//
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// Copyright (C) 2017 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 "slice_cached.h"
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#include <iostream>
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#include <vector>
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#include <utility>
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#include "slice.h"
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template <typename TX, typename TY, typename DerivedI>
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IGL_INLINE void igl::slice_cached_precompute(
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const Eigen::SparseMatrix<TX>& X,
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const Eigen::Matrix<int,Eigen::Dynamic,1> & R,
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const Eigen::Matrix<int,Eigen::Dynamic,1> & C,
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Eigen::MatrixBase<DerivedI>& data,
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Eigen::SparseMatrix<TY>& Y
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)
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{
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// Create a sparse matrix whose entries are the ids
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Eigen::SparseMatrix<unsigned> TS = X.template cast<unsigned>();
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TS.makeCompressed();
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for (unsigned i=0;i<TS.nonZeros();++i)
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*(TS.valuePtr() + i) = i;
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Eigen::SparseMatrix<unsigned> TS_sliced;
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igl::slice(TS,R,C,TS_sliced);
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Y = TS_sliced.cast<TY>();
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data.resize(TS_sliced.nonZeros());
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for (unsigned i=0;i<data.size();++i)
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{
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data[i] = *(TS_sliced.valuePtr() + i);
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*(Y.valuePtr() + i) = *(X.valuePtr() + data[i]);
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}
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}
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template <typename TX, typename TY, typename DerivedI>
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IGL_INLINE void igl::slice_cached(
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const Eigen::SparseMatrix<TX>& X,
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const Eigen::MatrixBase<DerivedI>& data,
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Eigen::SparseMatrix<TY>& Y
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)
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{
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for (unsigned i=0; i<data.size(); ++i)
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*(Y.valuePtr() + i) = *(X.valuePtr() + data[i]);
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}
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#ifdef IGL_STATIC_LIBRARY
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template void igl::slice_cached<double, double, Eigen::Matrix<int, -1, 1, 0, -1, 1> >(Eigen::SparseMatrix<double, 0, int> const&, Eigen::MatrixBase<Eigen::Matrix<int, -1, 1, 0, -1, 1> > const&, Eigen::SparseMatrix<double, 0, int>&);
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template void igl::slice_cached_precompute<double, double, Eigen::Matrix<int, -1, 1, 0, -1, 1> >(Eigen::SparseMatrix<double, 0, int> const&, Eigen::Matrix<int, -1, 1, 0, -1, 1> const&, Eigen::Matrix<int, -1, 1, 0, -1, 1> const&, Eigen::MatrixBase<Eigen::Matrix<int, -1, 1, 0, -1, 1> >&, Eigen::SparseMatrix<double, 0, int>&);
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#endif
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