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annotate libs/vmath/vmath.h @ 0:b2f14e535253

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author John Tsiombikas <nuclear@member.fsf.org>
date Sat, 01 Feb 2014 19:58:19 +0200
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nuclear@0 1 /*
nuclear@0 2 libvmath - a vector math library
nuclear@0 3 Copyright (C) 2004-2013 John Tsiombikas <nuclear@member.fsf.org>
nuclear@0 4
nuclear@0 5 This program is free software: you can redistribute it and/or modify
nuclear@0 6 it under the terms of the GNU Lesser General Public License as published
nuclear@0 7 by the Free Software Foundation, either version 3 of the License, or
nuclear@0 8 (at your option) any later version.
nuclear@0 9
nuclear@0 10 This program is distributed in the hope that it will be useful,
nuclear@0 11 but WITHOUT ANY WARRANTY; without even the implied warranty of
nuclear@0 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
nuclear@0 13 GNU Lesser General Public License for more details.
nuclear@0 14
nuclear@0 15 You should have received a copy of the GNU Lesser General Public License
nuclear@0 16 along with this program. If not, see <http://www.gnu.org/licenses/>.
nuclear@0 17 */
nuclear@0 18
nuclear@0 19 #ifndef VMATH_H_
nuclear@0 20 #define VMATH_H_
nuclear@0 21
nuclear@0 22 #include <math.h>
nuclear@0 23 #include "vmath_types.h"
nuclear@0 24
nuclear@0 25 #ifndef M_PI
nuclear@0 26 #define M_PI PI
nuclear@0 27 #endif
nuclear@0 28
nuclear@0 29 #ifndef M_E
nuclear@0 30 #define M_E 2.718281828459045
nuclear@0 31 #endif
nuclear@0 32
nuclear@0 33 #define PI 3.141592653589793
nuclear@0 34 #define HALF_PI 1.570796326794897
nuclear@0 35 #define QUARTER_PI 0.785398163397448
nuclear@0 36 #define TWO_PI 6.283185307179586
nuclear@0 37
nuclear@0 38
nuclear@0 39 #define RAD_TO_DEG(a) ((((scalar_t)a) * 360.0) / TWO_PI)
nuclear@0 40 #define DEG_TO_RAD(a) (((scalar_t)a) * (PI / 180.0))
nuclear@0 41
nuclear@0 42 #define SQ(x) ((x) * (x))
nuclear@0 43
nuclear@0 44 #define MIN(a, b) ((a) < (b) ? (a) : (b))
nuclear@0 45 #define MAX(a, b) ((a) > (b) ? (a) : (b))
nuclear@0 46
nuclear@0 47 #ifndef __GNUC__
nuclear@0 48 #define round(x) ((x) >= 0 ? (x) + 0.5 : (x) - 0.5)
nuclear@0 49 #endif
nuclear@0 50
nuclear@0 51 #ifdef __cplusplus
nuclear@0 52 extern "C" {
nuclear@0 53 #endif /* __cplusplus */
nuclear@0 54
nuclear@0 55 void enable_fpexcept(void);
nuclear@0 56 void disable_fpexcept(void);
nuclear@0 57
nuclear@0 58 static inline scalar_t smoothstep(float a, float b, float x);
nuclear@0 59
nuclear@0 60 static inline scalar_t frand(scalar_t range);
nuclear@0 61 static inline vec3_t sphrand(scalar_t rad);
nuclear@0 62
nuclear@0 63 scalar_t integral(scalar_t (*f)(scalar_t), scalar_t low, scalar_t high, int samples);
nuclear@0 64 scalar_t gaussian(scalar_t x, scalar_t mean, scalar_t sdev);
nuclear@0 65
nuclear@0 66 static inline scalar_t lerp(scalar_t a, scalar_t b, scalar_t t);
nuclear@0 67
nuclear@0 68 scalar_t bspline(scalar_t a, scalar_t b, scalar_t c, scalar_t d, scalar_t t);
nuclear@0 69 scalar_t spline(scalar_t a, scalar_t b, scalar_t c, scalar_t d, scalar_t t);
nuclear@0 70 scalar_t bezier(scalar_t a, scalar_t b, scalar_t c, scalar_t d, scalar_t t);
nuclear@0 71
nuclear@0 72 scalar_t noise1(scalar_t x);
nuclear@0 73 scalar_t noise2(scalar_t x, scalar_t y);
nuclear@0 74 scalar_t noise3(scalar_t x, scalar_t y, scalar_t z);
nuclear@0 75
nuclear@0 76 scalar_t fbm1(scalar_t x, int octaves);
nuclear@0 77 scalar_t fbm2(scalar_t x, scalar_t y, int octaves);
nuclear@0 78 scalar_t fbm3(scalar_t x, scalar_t y, scalar_t z, int octaves);
nuclear@0 79
nuclear@0 80 scalar_t turbulence1(scalar_t x, int octaves);
nuclear@0 81 scalar_t turbulence2(scalar_t x, scalar_t y, int octaves);
nuclear@0 82 scalar_t turbulence3(scalar_t x, scalar_t y, scalar_t z, int octaves);
nuclear@0 83
nuclear@0 84 #ifdef __cplusplus
nuclear@0 85 }
nuclear@0 86 #endif /* __cplusplus */
nuclear@0 87
nuclear@0 88 #include "vmath.inl"
nuclear@0 89
nuclear@0 90 #include "vector.h"
nuclear@0 91 #include "matrix.h"
nuclear@0 92 #include "quat.h"
nuclear@0 93 #include "sphvec.h"
nuclear@0 94 #include "ray.h"
nuclear@0 95 #include "geom.h"
nuclear@0 96
nuclear@0 97 #endif /* VMATH_H_ */