X-Git-Url: http://git.droids-corp.org/?p=aversive.git;a=blobdiff_plain;f=modules%2Fbase%2Fmath%2Fgeometry%2Flines.h;h=6763b91db60279cb9615097b66794843f2470972;hp=a6cf4215742609f782eacb116fbf9f69b657e302;hb=d1cc3debac68c0012f2c5ca33da9bcf0882f4988;hpb=ccc6954bb046671b9e28c5806db5121c1eef49c0

diff --git a/modules/base/math/geometry/lines.h b/modules/base/math/geometry/lines.h
index a6cf421..6763b91 100755
--- a/modules/base/math/geometry/lines.h
+++ b/modules/base/math/geometry/lines.h
@@ -1,3 +1,27 @@
+/*
+ *  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;
@@ -5,16 +29,27 @@ typedef struct _line {
 } line_t;
 
 
-void 
+void
 pts2line(const point_t *p1, const point_t *p2, line_t *l);
 
 void
-proj_pt_line(const point_t * p, const line_t * l, point_t * p_out);
+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, 
+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_ */