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46 lines
1.8 KiB
46 lines
1.8 KiB
/* |
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* polygon.h |
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* Copyright (C) Andrew Tridgell 2011 |
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* |
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* This file is free software: you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License as published by the |
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* Free Software Foundation, either version 3 of the License, or |
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* (at your option) any later version. |
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* |
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* This file is distributed in the hope that it will be useful, but |
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* WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
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* See the GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License along |
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* with this program. If not, see <http://www.gnu.org/licenses/>. |
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*/ |
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#pragma once |
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#include "vector2.h" |
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template <typename T> |
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bool Polygon_outside(const Vector2<T> &P, const Vector2<T> *V, unsigned n) WARN_IF_UNUSED; |
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template <typename T> |
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bool Polygon_complete(const Vector2<T> *V, unsigned n) WARN_IF_UNUSED; |
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/* |
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determine if the polygon of N verticies defined by points V is |
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intersected by a line from point p1 to point p2 |
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intersection argument returns the intersection closest to p1 |
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*/ |
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bool Polygon_intersects(const Vector2f *V, unsigned N, const Vector2f &p1, const Vector2f &p2, Vector2f &intersection) WARN_IF_UNUSED; |
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/* |
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return the closest distance that a line from p1 to p2 comes to an |
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edge of closed polygon V, defined by N points |
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negative numbers indicate the line cross into the polygon with the negative size being the distance from p2 to the intersection point closest to p1 |
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*/ |
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float Polygon_closest_distance_line(const Vector2f *V, unsigned N, const Vector2f &p1, const Vector2f &p2); |
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/* |
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return the closest distance that a point p comes to an edge of |
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closed polygon V, defined by N points |
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*/ |
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float Polygon_closest_distance_point(const Vector2f *V, unsigned N, const Vector2f &p);
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