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85 lines
3.0 KiB
85 lines
3.0 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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#include "is_edge_manifold.h"
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#include "oriented_facets.h"
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#include "unique_simplices.h"
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#include "unique_edge_map.h"
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#include <algorithm>
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#include <vector>
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template <
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typename DerivedF,
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typename DerivedEMAP,
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typename DerivedBF,
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typename DerivedBE>
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IGL_INLINE bool igl::is_edge_manifold(
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const Eigen::MatrixBase<DerivedF>& F,
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const typename DerivedF::Index ne,
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const Eigen::MatrixBase<DerivedEMAP>& EMAP,
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Eigen::PlainObjectBase<DerivedBF>& BF,
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Eigen::PlainObjectBase<DerivedBE>& BE)
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{
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typedef typename DerivedF::Index Index;
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std::vector<Index> count(ne,0);
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for(Index e = 0;e<EMAP.rows();e++)
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{
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count[EMAP[e]]++;
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}
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const Index m = F.rows();
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BF.resize(m,3);
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BE.resize(ne,1);
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bool all = true;
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for(Index e = 0;e<EMAP.rows();e++)
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{
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const bool manifold = count[EMAP[e]] <= 2;
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all &= BF(e%m,e/m) = manifold;
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BE(EMAP[e]) = manifold;
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}
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return all;
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}
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template <
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typename DerivedF,
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typename DerivedBF,
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typename DerivedE,
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typename DerivedEMAP,
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typename DerivedBE>
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IGL_INLINE bool igl::is_edge_manifold(
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const Eigen::MatrixBase<DerivedF>& F,
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Eigen::PlainObjectBase<DerivedBF>& BF,
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Eigen::PlainObjectBase<DerivedE>& E,
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Eigen::PlainObjectBase<DerivedEMAP>& EMAP,
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Eigen::PlainObjectBase<DerivedBE>& BE)
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{
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using namespace Eigen;
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typedef Matrix<typename DerivedF::Scalar,Dynamic,2> MatrixXF2;
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MatrixXF2 allE;
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unique_edge_map(F,allE,E,EMAP);
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return is_edge_manifold(F,E.rows(),EMAP,BF,BE);
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}
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template <typename DerivedF>
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IGL_INLINE bool igl::is_edge_manifold(
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const Eigen::MatrixBase<DerivedF>& F)
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{
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Eigen::Array<bool,Eigen::Dynamic,Eigen::Dynamic> BF;
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Eigen::Array<bool,Eigen::Dynamic,1> BE;
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Eigen::MatrixXi E;
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Eigen::VectorXi EMAP;
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return is_edge_manifold(F,BF,E,EMAP,BE);
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}
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#ifdef IGL_STATIC_LIBRARY
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// Explicit template instantiation
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template bool igl::is_edge_manifold<Eigen::Matrix<unsigned int, -1, -1, 1, -1, -1> >(Eigen::MatrixBase<Eigen::Matrix<unsigned int, -1, -1, 1, -1, -1> > const&);
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template bool igl::is_edge_manifold<Eigen::Matrix<int, -1, -1, 0, -1, -1> >(Eigen::MatrixBase<Eigen::Matrix<int, -1, -1, 0, -1, -1> > const&);
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template bool igl::is_edge_manifold<Eigen::Matrix<int, -1, 3, 0, -1, 3> >(Eigen::MatrixBase<Eigen::Matrix<int, -1, 3, 0, -1, 3> > const&);
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template bool igl::is_edge_manifold<Eigen::Matrix<int, -1, -1, 0, -1, -1>, Eigen::Matrix<int, -1, 1, 0, -1, 1>, Eigen::Array<bool, -1, -1, 0, -1, -1>, Eigen::Array<bool, -1, 1, 0, -1, 1> >(Eigen::MatrixBase<Eigen::Matrix<int, -1, -1, 0, -1, -1> > const&, Eigen::Matrix<int, -1, -1, 0, -1, -1>::Index, Eigen::MatrixBase<Eigen::Matrix<int, -1, 1, 0, -1, 1> > const&, Eigen::PlainObjectBase<Eigen::Array<bool, -1, -1, 0, -1, -1> >&, Eigen::PlainObjectBase<Eigen::Array<bool, -1, 1, 0, -1, 1> >&);
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#endif
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