53 lines
1.6 KiB
C
53 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) 2016 Qingan Zhou <qnzhou@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_FLIP_EDGE_H
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#define IGL_FLIP_EDGE_H
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#include "igl_inline.h"
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#include <Eigen/Core>
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#include <vector>
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namespace igl
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{
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// Flip an edge in a triangle mesh. The edge specified by uei must have
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// exactly **two** adjacent faces. Violation will result in exception.
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// Another warning: edge flipping could convert manifold mesh into
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// non-manifold.
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//
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// Inputs:
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// F #F by 3 list of triangles.
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// E #F*3 by 2 list of all of directed edges
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// uE #uE by 2 list of unique undirected edges
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// EMAP #F*3 list of indices into uE, mapping each directed edge to unique
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// undirected edge
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// uE2E #uE list of lists of indices into E of coexisting edges
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// ue index into uE the edge to be flipped.
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//
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// Output:
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// Updated F, E, uE, EMAP and uE2E.
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template <
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typename DerivedF,
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typename DerivedE,
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typename DeriveduE,
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typename DerivedEMAP,
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typename uE2EType>
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IGL_INLINE void flip_edge(
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Eigen::PlainObjectBase<DerivedF> & F,
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Eigen::PlainObjectBase<DerivedE> & E,
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Eigen::PlainObjectBase<DeriveduE> & uE,
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Eigen::PlainObjectBase<DerivedEMAP> & EMAP,
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std::vector<std::vector<uE2EType> > & uE2E,
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const size_t uei);
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}
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#ifndef IGL_STATIC_LIBRARY
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# include "flip_edge.cpp"
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#endif
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#endif
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