+/*
+ * Copyright Droids Corporation (2009)
+ *
+ * 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 02111-1307 USA
+ *
+ * Revision : $Id: f16.h,v 1.6.4.3 2008-05-10 15:06:26 zer0 Exp $
+ *
+ */
+
+#ifndef _LINES_H_
+#define _LINES_H_
+
typedef struct _line {
double a;
double b;
void
proj_pt_line(const point_t * p, const line_t * l, point_t * p_out);
-uint8_t
+/*
+ * return values:
+ * 0 dont cross
+ * 1 cross
+ * 2 "parallel crossing"
+ *
+ * p argument is the crossing point coordinates (dummy for 0 or 2
+ * result)
+ */
+uint8_t
intersect_line(const line_t *l1, const line_t *l2, point_t *p);
uint8_t
intersect_segment(const point_t *s1, const point_t *s2,
const point_t *t1, const point_t *t2,
point_t *p);
+
+#endif /* _LINES_H_ */