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#ifndef intersection_h
#define intersection_h
/* intersection.h */
/* avr.math.geometry  Geometry math module. {{{
*
* Copyright (C) 2012 Nicolas Schodet
*
* APBTeam:
* Web: http://apbteam.org/
* Email: team AT apbteam DOT org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place  Suite 330, Boston, MA 021111307, USA.
*
* }}} */
#include "modules/math/geometry/vect.h"
/** Test intersection between two line segments. Return non zero if they
* intersect.
*  a, b: first line segment vertices.
*  c, d: second line segment vertices.
*
* If AB and CD are parallel or if a vertice is exactly on the other segment,
* consider there is no intersection. */
uint8_t
intersection_segment_segment (const vect_t *a, const vect_t *b,
const vect_t *c, const vect_t *d);
/** Test intersection between a line segment and any line segment defining a
* polygon. Return non zero if they intersect.
*  a, b: line segment vertices.
*  poly: array of polygon vertices.
*  poly_size: number of polygon vertices. */
uint8_t
intersection_segment_poly (const vect_t *a, const vect_t *b,
const vect_t *poly, uint8_t poly_size);
#endif /* intersection_h */
