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40 lines
1.1 KiB
40 lines
1.1 KiB
// 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_COPYLEFT_CGAL_ORIENT_2D_H
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#define IGL_COPYLEFT_CGAL_ORIENT_2D_H
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#include "../../igl_inline.h"
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namespace igl
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{
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namespace copyleft
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{
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namespace cgal
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{
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/// Tests whether a point is above, on, or below a line.
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///
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/// @param[in] pa 2D point on plane
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/// @param[in] pb 2D point on plane
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/// @param[in] pc 2D point to test
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/// @return 1 if pa,pb,pc,pd forms a triangle of positive area.
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/// 0 if pa,pb,pc,pd are coplanar.
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/// -1 if pa,pb,pc,pd forms a tet of negative area.
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template <typename Scalar>
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IGL_INLINE short orient2D(
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const Scalar *pa,
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const Scalar *pb,
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const Scalar *pc);
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}
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}
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}
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#ifndef IGL_STATIC_LIBRARY
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# include "orient2D.cpp"
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#endif
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#endif
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