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54 lines
1.9 KiB
54 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) 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_EDGES_H
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#define IGL_EDGES_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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/// Constructs a list of unique edges represented in a given mesh (V,F)
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///
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/// @param[in] F #F by (3|4) list of mesh simplex indices
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/// @param[out] E #E by 2 list of edges in no particular order
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///
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/// \see adjacency_matrix
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template <typename DerivedF, typename DerivedE>
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IGL_INLINE void edges(
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const Eigen::MatrixBase<DerivedF> & F,
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Eigen::PlainObjectBase<DerivedE> & E);
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/// Constructs a list of unique edges represented in a given polygon mesh.
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///
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/// @param[in] I #I vectorized list of polygon corner indices into rows of some matrix V
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/// @param[in] C #polygons+1 list of cumulative polygon sizes so that C(i+1)-C(i) =
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/// size of the ith polygon, and so I(C(i)) through I(C(i+1)-1) are the
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/// indices of the ith polygon
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/// @param[out] E #E by 2 list of edges in no particular order
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template <typename DerivedI, typename DerivedC, typename DerivedE>
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IGL_INLINE void edges(
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const Eigen::MatrixBase<DerivedI> & I,
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const Eigen::MatrixBase<DerivedC> & C,
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Eigen::PlainObjectBase<DerivedE> & E);
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/// Constructs a list of unique edges represented in a given adjacency matrix.
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///
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/// @param[in] A #V by #V symmetric adjacency matrix
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/// @param[out] E #E by 2 list of edges in no particular order
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template <typename T, typename DerivedE>
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IGL_INLINE void edges(
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const Eigen::SparseMatrix<T> & A,
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Eigen::PlainObjectBase<DerivedE> & E);
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}
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#ifndef IGL_STATIC_LIBRARY
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# include "edges.cpp"
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#endif
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#endif
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