goat3d

annotate libs/vmath/vmath.h @ 43:1dcbe87b6a5d

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ops, screwed up the GOAT3DAPI define
author John Tsiombikas <nuclear@member.fsf.org>
date Thu, 05 Dec 2013 18:49:19 +0200
parents 4deb0b12fe14
children
rev   line source
nuclear@27 1 /*
nuclear@27 2 libvmath - a vector math library
nuclear@27 3 Copyright (C) 2004-2013 John Tsiombikas <nuclear@member.fsf.org>
nuclear@27 4
nuclear@27 5 This program is free software: you can redistribute it and/or modify
nuclear@27 6 it under the terms of the GNU Lesser General Public License as published
nuclear@27 7 by the Free Software Foundation, either version 3 of the License, or
nuclear@27 8 (at your option) any later version.
nuclear@27 9
nuclear@27 10 This program is distributed in the hope that it will be useful,
nuclear@27 11 but WITHOUT ANY WARRANTY; without even the implied warranty of
nuclear@27 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
nuclear@27 13 GNU Lesser General Public License for more details.
nuclear@27 14
nuclear@27 15 You should have received a copy of the GNU Lesser General Public License
nuclear@27 16 along with this program. If not, see <http://www.gnu.org/licenses/>.
nuclear@27 17 */
nuclear@27 18
nuclear@27 19 #ifndef VMATH_H_
nuclear@27 20 #define VMATH_H_
nuclear@27 21
nuclear@27 22 #include <math.h>
nuclear@27 23 #include "vmath_types.h"
nuclear@27 24
nuclear@27 25 #ifndef M_PI
nuclear@27 26 #define M_PI PI
nuclear@27 27 #endif
nuclear@27 28
nuclear@27 29 #ifndef M_E
nuclear@27 30 #define M_E 2.718281828459045
nuclear@27 31 #endif
nuclear@27 32
nuclear@27 33 #define PI 3.141592653589793
nuclear@27 34 #define HALF_PI 1.570796326794897
nuclear@27 35 #define QUARTER_PI 0.785398163397448
nuclear@27 36 #define TWO_PI 6.283185307179586
nuclear@27 37
nuclear@27 38
nuclear@27 39 #define RAD_TO_DEG(a) ((((scalar_t)a) * 360.0) / TWO_PI)
nuclear@27 40 #define DEG_TO_RAD(a) (((scalar_t)a) * (PI / 180.0))
nuclear@27 41
nuclear@27 42 #define SQ(x) ((x) * (x))
nuclear@27 43
nuclear@27 44 #define MIN(a, b) ((a) < (b) ? (a) : (b))
nuclear@27 45 #define MAX(a, b) ((a) > (b) ? (a) : (b))
nuclear@27 46
nuclear@27 47 #ifndef __GNUC__
nuclear@27 48 #define round(x) ((x) >= 0 ? (x) + 0.5 : (x) - 0.5)
nuclear@27 49 #endif
nuclear@27 50
nuclear@27 51 #ifdef __cplusplus
nuclear@27 52 extern "C" {
nuclear@27 53 #endif /* __cplusplus */
nuclear@27 54
nuclear@28 55 static VMATH_INLINE scalar_t smoothstep(float a, float b, float x);
nuclear@27 56
nuclear@28 57 static VMATH_INLINE scalar_t frand(scalar_t range);
nuclear@28 58 static VMATH_INLINE vec3_t sphrand(scalar_t rad);
nuclear@27 59
nuclear@27 60 scalar_t integral(scalar_t (*f)(scalar_t), scalar_t low, scalar_t high, int samples);
nuclear@27 61 scalar_t gaussian(scalar_t x, scalar_t mean, scalar_t sdev);
nuclear@27 62
nuclear@28 63 static VMATH_INLINE scalar_t lerp(scalar_t a, scalar_t b, scalar_t t);
nuclear@27 64
nuclear@27 65 scalar_t bspline(scalar_t a, scalar_t b, scalar_t c, scalar_t d, scalar_t t);
nuclear@27 66 scalar_t spline(scalar_t a, scalar_t b, scalar_t c, scalar_t d, scalar_t t);
nuclear@27 67 scalar_t bezier(scalar_t a, scalar_t b, scalar_t c, scalar_t d, scalar_t t);
nuclear@27 68
nuclear@27 69 scalar_t noise1(scalar_t x);
nuclear@27 70 scalar_t noise2(scalar_t x, scalar_t y);
nuclear@27 71 scalar_t noise3(scalar_t x, scalar_t y, scalar_t z);
nuclear@27 72
nuclear@27 73 scalar_t fbm1(scalar_t x, int octaves);
nuclear@27 74 scalar_t fbm2(scalar_t x, scalar_t y, int octaves);
nuclear@27 75 scalar_t fbm3(scalar_t x, scalar_t y, scalar_t z, int octaves);
nuclear@27 76
nuclear@27 77 scalar_t turbulence1(scalar_t x, int octaves);
nuclear@27 78 scalar_t turbulence2(scalar_t x, scalar_t y, int octaves);
nuclear@27 79 scalar_t turbulence3(scalar_t x, scalar_t y, scalar_t z, int octaves);
nuclear@27 80
nuclear@27 81 #ifdef __cplusplus
nuclear@27 82 }
nuclear@27 83 #endif /* __cplusplus */
nuclear@27 84
nuclear@27 85 #include "vmath.inl"
nuclear@27 86
nuclear@27 87 #include "vector.h"
nuclear@27 88 #include "matrix.h"
nuclear@27 89 #include "quat.h"
nuclear@27 90 #include "sphvec.h"
nuclear@27 91 #include "ray.h"
nuclear@27 92 #include "geom.h"
nuclear@27 93
nuclear@27 94 #endif /* VMATH_H_ */