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33 lines
1.4 KiB
33 lines
1.4 KiB
// This file is part of libigl, a simple c++ geometry processing library.
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//
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// Copyright (C) 2019 Hanxiao Shen <hanxiao@cs.nyu.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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#include "point_inside_convex_polygon.h"
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template <typename DerivedP, typename DerivedQ>
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IGL_INLINE bool igl::predicates::point_inside_convex_polygon(
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const Eigen::MatrixBase<DerivedP>& P,
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const Eigen::MatrixBase<DerivedQ>& q
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){
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EIGEN_STATIC_ASSERT_MATRIX_SPECIFIC_SIZE(DerivedP, Eigen::Dynamic, 2);
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EIGEN_STATIC_ASSERT_MATRIX_SPECIFIC_SIZE(DerivedQ, 1, 2);
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typedef typename DerivedP::Scalar Scalar;
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for(int i=0;i<P.rows();i++){
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int i_1 = (i+1) % P.rows();
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Eigen::Matrix<Scalar,1,2> a = P.row(i);
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Eigen::Matrix<Scalar,1,2> b = P.row(i_1);
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auto r = igl::predicates::orient2d(a,b,q);
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if(r == igl::predicates::Orientation::COLLINEAR ||
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r == igl::predicates::Orientation::NEGATIVE)
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return false;
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}
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return true;
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}
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#ifdef IGL_STATIC_LIBRARY
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template bool igl::predicates::point_inside_convex_polygon<Eigen::Matrix<double, -1, 2, 0, -1, 2>, Eigen::Matrix<double, 1, 2, 1, 1, 2> >(Eigen::MatrixBase<Eigen::Matrix<double, -1, 2, 0, -1, 2> > const&, Eigen::MatrixBase<Eigen::Matrix<double, 1, 2, 1, 1, 2> > const&);
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#endif
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