36 lines
1010 B
C++
36 lines
1010 B
C++
/*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* Copyright 2016-2018 Danny Robson <danny@nerdcruft.net>
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*/
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#include "tri.hpp"
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///////////////////////////////////////////////////////////////////////////////
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template <typename T>
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bool
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cruft::geom::inclusive (tri2<T> const &obj, point2<T> const &p)
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{
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// Assumes ccw winding
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CHECK (cross (obj.b - obj.a, obj.c - obj.a) > 0);
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auto const sign = [] (
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cruft::point2f const p_,
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cruft::point2f const a_,
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cruft::point2f const b_)
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{
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return cross (p_ - a_, b_ - a_);
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};
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return sign (p, obj.a, obj.b) <= 0
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and sign (p, obj.b, obj.c) <= 0
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and sign (p, obj.c, obj.a) <= 0;
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}
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//-----------------------------------------------------------------------------
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template bool cruft::geom::inclusive (tri2<f32> const&, point2<f32> const&);
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