4 * Copyright (C) 2008 Adam Williams <broadcast at earthling dot net>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
27 #define SQR(x) ((x) * (x))
29 #define CLIP(x, y, z) ((x) < (y) ? (y) : ((x) > (z) ? (z) : (x)))
31 #define RECLIP(x, y, z) ((x) = ((x) < (y) ? (y) : ((x) > (z) ? (z) : (x))))
33 #define CLAMP(x, y, z) ((x) = ((x) < (y) ? (y) : ((x) > (z) ? (z) : (x))))
35 #define MAX(x, y) ((x) > (y) ? (x) : (y))
37 #define MIN(x, y) ((x) < (y) ? (x) : (y))
39 #define EQUIV(x, y) (fabs((x) - (y)) < 0.001)
41 #define DISTANCE(x1, y1, x2, y2) \
42 (sqrt(((x2) - (x1)) * ((x2) - (x1)) + ((y2) - (y1)) * ((y2) - (y1))))