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annotate libs/vmath/vmath.h @ 13:ea928c313344

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author John Tsiombikas <nuclear@member.fsf.org>
date Mon, 28 Sep 2015 19:04:50 +0300
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nuclear@2 1 /*
nuclear@2 2 libvmath - a vector math library
nuclear@2 3 Copyright (C) 2004-2011 John Tsiombikas <nuclear@member.fsf.org>
nuclear@2 4
nuclear@2 5 This program is free software: you can redistribute it and/or modify
nuclear@2 6 it under the terms of the GNU Lesser General Public License as published
nuclear@2 7 by the Free Software Foundation, either version 3 of the License, or
nuclear@2 8 (at your option) any later version.
nuclear@2 9
nuclear@2 10 This program is distributed in the hope that it will be useful,
nuclear@2 11 but WITHOUT ANY WARRANTY; without even the implied warranty of
nuclear@2 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
nuclear@2 13 GNU Lesser General Public License for more details.
nuclear@2 14
nuclear@2 15 You should have received a copy of the GNU Lesser General Public License
nuclear@2 16 along with this program. If not, see <http://www.gnu.org/licenses/>.
nuclear@2 17 */
nuclear@2 18
nuclear@2 19 #ifndef VMATH_H_
nuclear@2 20 #define VMATH_H_
nuclear@2 21
nuclear@2 22 #include <math.h>
nuclear@2 23 #include "vmath_types.h"
nuclear@2 24
nuclear@2 25 #ifndef M_PI
nuclear@2 26 #define M_PI PI
nuclear@2 27 #endif
nuclear@2 28
nuclear@2 29 #ifndef M_E
nuclear@2 30 #define M_E 2.718281828459045
nuclear@2 31 #endif
nuclear@2 32
nuclear@2 33 #define PI 3.141592653589793
nuclear@2 34 #define HALF_PI 1.570796326794897
nuclear@2 35 #define QUARTER_PI 0.785398163397448
nuclear@2 36 #define TWO_PI 6.283185307179586
nuclear@2 37
nuclear@2 38
nuclear@2 39 #define RAD_TO_DEG(a) ((((scalar_t)a) * 360.0) / TWO_PI)
nuclear@2 40 #define DEG_TO_RAD(a) (((scalar_t)a) * (PI / 180.0))
nuclear@2 41
nuclear@2 42 #define SQ(x) ((x) * (x))
nuclear@2 43
nuclear@2 44 #define MIN(a, b) ((a) < (b) ? (a) : (b))
nuclear@2 45 #define MAX(a, b) ((a) > (b) ? (a) : (b))
nuclear@2 46
nuclear@2 47 #ifndef __GNUC__
nuclear@2 48 #define round(x) ((x) >= 0 ? (x) + 0.5 : (x) - 0.5)
nuclear@2 49 #endif
nuclear@2 50
nuclear@2 51 #ifdef __cplusplus
nuclear@2 52 extern "C" {
nuclear@2 53 #endif /* __cplusplus */
nuclear@2 54
nuclear@2 55 static inline scalar_t frand(scalar_t range);
nuclear@2 56 static inline vec3_t sphrand(scalar_t rad);
nuclear@2 57
nuclear@2 58 scalar_t integral(scalar_t (*f)(scalar_t), scalar_t low, scalar_t high, int samples);
nuclear@2 59 scalar_t gaussian(scalar_t x, scalar_t mean, scalar_t sdev);
nuclear@2 60
nuclear@2 61 static inline scalar_t lerp(scalar_t a, scalar_t b, scalar_t t);
nuclear@2 62
nuclear@2 63 scalar_t bspline(scalar_t a, scalar_t b, scalar_t c, scalar_t d, scalar_t t);
nuclear@2 64 scalar_t spline(scalar_t a, scalar_t b, scalar_t c, scalar_t d, scalar_t t);
nuclear@2 65 scalar_t bezier(scalar_t a, scalar_t b, scalar_t c, scalar_t d, scalar_t t);
nuclear@2 66
nuclear@2 67 scalar_t noise1(scalar_t x);
nuclear@2 68 scalar_t noise2(scalar_t x, scalar_t y);
nuclear@2 69 scalar_t noise3(scalar_t x, scalar_t y, scalar_t z);
nuclear@2 70
nuclear@2 71 scalar_t fbm1(scalar_t x, int octaves);
nuclear@2 72 scalar_t fbm2(scalar_t x, scalar_t y, int octaves);
nuclear@2 73 scalar_t fbm3(scalar_t x, scalar_t y, scalar_t z, int octaves);
nuclear@2 74
nuclear@2 75 scalar_t turbulence1(scalar_t x, int octaves);
nuclear@2 76 scalar_t turbulence2(scalar_t x, scalar_t y, int octaves);
nuclear@2 77 scalar_t turbulence3(scalar_t x, scalar_t y, scalar_t z, int octaves);
nuclear@2 78
nuclear@2 79 #ifdef __cplusplus
nuclear@2 80 }
nuclear@2 81 #endif /* __cplusplus */
nuclear@2 82
nuclear@2 83 #include "vmath.inl"
nuclear@2 84
nuclear@2 85 #include "vector.h"
nuclear@2 86 #include "matrix.h"
nuclear@2 87 #include "quat.h"
nuclear@2 88 #include "sphvec.h"
nuclear@2 89 #include "ray.h"
nuclear@2 90 #include "geom.h"
nuclear@2 91
nuclear@2 92 #endif /* VMATH_H_ */