52 lines
1.6 KiB
C
52 lines
1.6 KiB
C
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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) 2018 Oded Stein <oded.stein@columbia.edu>
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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_TET_TET_ADJACENCY_H
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#define IGL_TET_TET_ADJACENCY_H
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#include <Eigen/Core>
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#include <igl/igl_inline.h>
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namespace igl
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{
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// Constructs the tet_tet adjacency matrix for a given tet mesh with tets T
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//
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// Inputs:
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// T #T by 4 list of tets
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// Outputs:
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// TT #T by #4 adjacency matrix, the element i,j is the id of the tet
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// adjacent to the j face of tet i
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// TTi #T by #4 adjacency matrix, the element i,j is the id of face of
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// the tet TT(i,j) that is adjacent to tet i
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//
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// NOTE: the first face of a tet is [0,1,2], the second [0,1,3], the third
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// [1,2,3], and the fourth [2,0,3].
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template <typename DerivedT, typename DerivedTT, typename DerivedTTi>
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IGL_INLINE void tet_tet_adjacency(
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const Eigen::MatrixBase<DerivedT>& T,
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Eigen::PlainObjectBase<DerivedTT>& TT,
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Eigen::PlainObjectBase<DerivedTTi>& TTi);
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template <typename DerivedT, typename DerivedTT>
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IGL_INLINE void tet_tet_adjacency(
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const Eigen::MatrixBase<DerivedT>& T,
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Eigen::PlainObjectBase<DerivedTT>& TT);
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}
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#ifndef IGL_STATIC_LIBRARY
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# include "tet_tet_adjacency.cpp"
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#endif
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#endif
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