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46 lines
1.9 KiB
46 lines
1.9 KiB
1 year ago
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// This file is part of libigl, a simple c++ geometry processing library.
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//
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// Copyright (C) 2016 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_QSLIM_H
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#define IGL_QSLIM_H
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#include "igl_inline.h"
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#include <Eigen/Core>
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namespace igl
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{
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/// Decimate (simplify) a triangle mesh in nD according to the paper
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/// "Simplifying Surfaces with Color and Texture using Quadric Error Metrics"
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/// by [Garland and Heckbert, 1987] (technically a followup to qslim). The
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/// mesh can have open boundaries but should be edge-manifold.
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///
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/// @param[in] V #V by dim list of vertex positions. Assumes that vertices with
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/// infinite coordinates are "points at infinity" being used to close up
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/// boundary edges with faces. This allows special subspace quadrice for
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/// boundary edges: There should never be more than one "point at
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/// infinity" in a single triangle.
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/// @param[in] F #F by 3 list of triangle indices into V
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/// @param[in] max_m desired number of output faces
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/// @param[in] block_intersections whether to block intersections (see
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/// intersection_blocking_collapse_edge_callbacks)
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/// @param[out] U #U by dim list of output vertex posistions (can be same ref as V)
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/// @param[out] G #G by 3 list of output face indices into U (can be same ref as F)
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/// @param[out] J #G list of indices into F of birth face
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/// @param[out] I #U list of indices into V of birth vertices
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IGL_INLINE bool qslim(
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const Eigen::MatrixXd & V,
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const Eigen::MatrixXi & F,
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const int max_m,
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const bool block_intersections,
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Eigen::MatrixXd & U,
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Eigen::MatrixXi & G,
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Eigen::VectorXi & J,
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Eigen::VectorXi & I);
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}
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#ifndef IGL_STATIC_LIBRARY
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# include "qslim.cpp"
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#endif
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#endif
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