1 /* Copyright (C) 2010 Wildfire Games.
2 * This file is part of 0 A.D.
3 *
4 * 0 A.D. is free software: you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation, either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * 0 A.D. is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.
16 */
17
18 #ifndef INCLUDED_MATHUTIL
19 #define INCLUDED_MATHUTIL
20
21 #define DEGTORAD(a) ((a) * ((float)M_PI/180.0f))
22 #define RADTODEG(a) ((a) * (180.0f/(float)M_PI))
23 #define SQR(x) ((x) * (x))
24
25 template <typename T>
Interpolate(const T & a,const T & b,float l)26 inline T Interpolate(const T& a, const T& b, float l)
27 {
28 return a + (b - a) * l;
29 }
30
31 template <typename T>
clamp(T value,T min,T max)32 inline T clamp(T value, T min, T max)
33 {
34 if (value <= min) return min;
35 else if (value >= max) return max;
36 else return value;
37 }
38
sgn(float a)39 inline float sgn(float a)
40 {
41 if (a > 0.0f) return 1.0f;
42 if (a < 0.0f) return -1.0f;
43 return 0.0f;
44 }
45
46 #endif
47