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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.
69 lines
2.1 KiB
C++
69 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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#ifndef IGL_SLICE_CACHED_H
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#define IGL_SLICE_CACHED_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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// Act like the matlab X(row_indices,col_indices) operator, where row_indices,
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// col_indices are non-negative integer indices. This is a fast version of
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// igl::slice that can analyze and store the sparsity structure. It is slower
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// at the irst evaluation (slice_cached_precompute), but faster on the
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// subsequent ones.
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//
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// Inputs:
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// X m by n matrix
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// R list of row indices
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// C list of column indices
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//
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// Output:
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// Y #R by #C matrix
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// data Temporary data used by slice_cached to repeat this operation
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//
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// Usage:
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//
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// // Construct and slice up Laplacian
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// SparseMatrix<double> L,L_sliced;
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// igl::cotmatrix(V,F,L);
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// // Normal igl::slice call
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// igl::slice(L,in,in,L_in_in);
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// // Fast version
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// static VectorXi data; // static or saved in a global state
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// if (data.size() == 0)
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// igl::slice_cached_precompute(L,in,in,data,L_sliced);
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// else
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// igl::slice_cached(L,data,L_sliced);
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template <typename TX, typename TY, typename DerivedI>
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IGL_INLINE void 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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template <typename TX, typename TY, typename DerivedI>
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IGL_INLINE void 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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#ifndef IGL_STATIC_LIBRARY
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# include "slice_cached.cpp"
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#endif
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#endif
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