1 | /* Copyright (C) 2021 Wildfire Games.
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2 | * This file is part of 0 A.D.
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3 | *
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4 | * 0 A.D. is free software: you can redistribute it and/or modify
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5 | * it under the terms of the GNU General Public License as published by
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6 | * the Free Software Foundation, either version 2 of the License, or
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7 | * (at your option) any later version.
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8 | *
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9 | * 0 A.D. is distributed in the hope that it will be useful,
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10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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12 | * GNU General Public License for more details.
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13 | *
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14 | * You should have received a copy of the GNU General Public License
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15 | * along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.
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16 | */
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17 |
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18 | #ifndef INCLUDED_MATHUTIL
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19 | #define INCLUDED_MATHUTIL
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20 |
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21 | #define DEGTORAD(a) ((a) * ((float)M_PI/180.0f))
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22 | #define RADTODEG(a) ((a) * (180.0f/(float)M_PI))
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23 | #define SQR(x) ((x) * (x))
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24 |
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25 | template <typename T>
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26 | inline T Interpolate(const T& a, const T& b, float t)
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27 | {
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28 | return a + (b - a) * t;
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29 | }
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30 |
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31 | template <typename T>
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32 | inline T Clamp(T value, T min, T max)
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33 | {
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34 | if (value <= min)
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35 | return min;
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36 | else if (value >= max)
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37 | return max;
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38 | return value;
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39 | }
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40 |
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41 | inline float sgn(float a)
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42 | {
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43 | if (a > 0.0f)
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44 | return 1.0f;
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45 | if (a < 0.0f)
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46 | return -1.0f;
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47 | return 0.0f;
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48 | }
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49 |
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50 | #endif // INCLUDED_MATHUTIL
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