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82 lines
4.1 KiB
C++
82 lines
4.1 KiB
C++
// This file is part of libigl, a simple c++ geometry processing library.
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//
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// Copyright (C) 2015 Alec Jacobson
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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 "piecewise_constant_winding_number.h"
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#include "unique_edge_map.h"
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#include "PI.h"
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template <
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typename DerivedF,
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typename DeriveduE,
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typename uE2EType>
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IGL_INLINE bool igl::piecewise_constant_winding_number(
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const Eigen::MatrixBase<DerivedF>& F,
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const Eigen::MatrixBase<DeriveduE>& uE,
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const std::vector<std::vector<uE2EType> >& uE2E)
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{
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const size_t num_faces = F.rows();
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const size_t num_edges = uE.rows();
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const auto edge_index_to_face_index = [&](size_t ei)
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{
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return ei % num_faces;
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};
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const auto is_consistent = [&](size_t fid, size_t s, size_t d)
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{
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if ((size_t)F(fid, 0) == s && (size_t)F(fid, 1) == d) return true;
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if ((size_t)F(fid, 1) == s && (size_t)F(fid, 2) == d) return true;
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if ((size_t)F(fid, 2) == s && (size_t)F(fid, 0) == d) return true;
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if ((size_t)F(fid, 0) == d && (size_t)F(fid, 1) == s) return false;
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if ((size_t)F(fid, 1) == d && (size_t)F(fid, 2) == s) return false;
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if ((size_t)F(fid, 2) == d && (size_t)F(fid, 0) == s) return false;
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throw "Invalid face!!";
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};
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for (size_t i=0; i<num_edges; i++)
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{
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const size_t s = uE(i,0);
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const size_t d = uE(i,1);
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int count=0;
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for (const auto& ei : uE2E[i])
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{
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const size_t fid = edge_index_to_face_index(ei);
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if (is_consistent(fid, s, d))
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{
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count++;
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}
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else
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{
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count--;
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}
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}
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if (count != 0)
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{
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return false;
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}
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}
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return true;
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}
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template <typename DerivedF>
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IGL_INLINE bool igl::piecewise_constant_winding_number(
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const Eigen::MatrixBase<DerivedF>& F)
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{
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Eigen::Matrix<typename DerivedF::Scalar,Eigen::Dynamic,2> E, uE;
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Eigen::Matrix<typename DerivedF::Scalar,Eigen::Dynamic,1> EMAP;
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std::vector<std::vector<size_t> > uE2E;
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unique_edge_map(F, E, uE, EMAP, uE2E);
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return piecewise_constant_winding_number(F,uE,uE2E);
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}
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#ifdef IGL_STATIC_LIBRARY
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// Explicit template instantiation
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// generated by autoexplicit.sh
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template bool igl::piecewise_constant_winding_number<Eigen::Matrix<int, -1, 3, 1, -1, 3>, Eigen::Matrix<int, -1, -1, 0, -1, -1>, unsigned long>(Eigen::MatrixBase<Eigen::Matrix<int, -1, 3, 1, -1, 3> > const&, Eigen::MatrixBase<Eigen::Matrix<int, -1, -1, 0, -1, -1> > const&, std::vector<std::vector<unsigned long, std::allocator<unsigned long> >, std::allocator<std::vector<unsigned long, std::allocator<unsigned long> > > > const&);
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template bool igl::piecewise_constant_winding_number<Eigen::Matrix<int, -1, -1, 0, -1, -1>, Eigen::Matrix<int, -1, -1, 0, -1, -1>, unsigned long>(Eigen::MatrixBase<Eigen::Matrix<int, -1, -1, 0, -1, -1> > const&, Eigen::MatrixBase<Eigen::Matrix<int, -1, -1, 0, -1, -1> > const&, std::vector<std::vector<unsigned long, std::allocator<unsigned long> >, std::allocator<std::vector<unsigned long, std::allocator<unsigned long> > > > const&);
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#ifdef WIN32
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template bool igl::piecewise_constant_winding_number<class Eigen::Matrix<int, -1, -1, 0, -1, -1>, class Eigen::Matrix<int, -1, -1, 0, -1, -1>, unsigned __int64>(class Eigen::MatrixBase<class Eigen::Matrix<int, -1, -1, 0, -1, -1>> const &, class Eigen::MatrixBase<class Eigen::Matrix<int, -1, -1, 0, -1, -1>> const &, class std::vector<class std::vector<unsigned __int64, class std::allocator<unsigned __int64>>, class std::allocator<class std::vector<unsigned __int64, class std::allocator<unsigned __int64>>>> const &);
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template bool igl::piecewise_constant_winding_number<class Eigen::Matrix<int, -1, 3, 1, -1, 3>, class Eigen::Matrix<int, -1, -1, 0, -1, -1>, unsigned __int64>(class Eigen::MatrixBase<class Eigen::Matrix<int, -1, 3, 1, -1, 3>> const &, class Eigen::MatrixBase<class Eigen::Matrix<int, -1, -1, 0, -1, -1>> const &, class std::vector<class std::vector<unsigned __int64, class std::allocator<unsigned __int64>>, class std::allocator<class std::vector<unsigned __int64, class std::allocator<unsigned __int64>>>> const &);
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#endif
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#endif
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