| 1 | /* Copyright (C) 2010-2020 The RetroArch team |
| 2 | * |
| 3 | * --------------------------------------------------------------------------------------- |
| 4 | * The following license statement only applies to this file (vector_3.h). |
| 5 | * --------------------------------------------------------------------------------------- |
| 6 | * |
| 7 | * Permission is hereby granted, free of charge, |
| 8 | * to any person obtaining a copy of this software and associated documentation files (the "Software"), |
| 9 | * to deal in the Software without restriction, including without limitation the rights to |
| 10 | * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, |
| 11 | * and to permit persons to whom the Software is furnished to do so, subject to the following conditions: |
| 12 | * |
| 13 | * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. |
| 14 | * |
| 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, |
| 16 | * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
| 18 | * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, |
| 19 | * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 20 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| 21 | */ |
| 22 | |
| 23 | #ifndef __LIBRETRO_SDK_GFX_MATH_VECTOR_3_H__ |
| 24 | #define __LIBRETRO_SDK_GFX_MATH_VECTOR_3_H__ |
| 25 | |
| 26 | #include <stdint.h> |
| 27 | #include <math.h> |
| 28 | |
| 29 | #include <retro_common_api.h> |
| 30 | |
| 31 | RETRO_BEGIN_DECLS |
| 32 | |
| 33 | typedef float vec3_t[3]; |
| 34 | |
| 35 | #define vec3_dot(a, b) (a[0] * b[0] + a[1] * b[1] + a[2] * b[2]) |
| 36 | |
| 37 | #define vec3_cross(dst, a, b) \ |
| 38 | dst[0] = a[1]*b[2] - a[2]*b[1]; \ |
| 39 | dst[1] = a[2]*b[0] - a[0]*b[2]; \ |
| 40 | dst[2] = a[0]*b[1] - a[1]*b[0] |
| 41 | |
| 42 | #define vec3_length(a) sqrtf(vec3_dot(a,a)) |
| 43 | |
| 44 | #define vec3_add(dst, src) \ |
| 45 | dst[0] += src[0]; \ |
| 46 | dst[1] += src[1]; \ |
| 47 | dst[2] += src[2] |
| 48 | |
| 49 | #define vec3_subtract(dst, src) \ |
| 50 | dst[0] -= src[0]; \ |
| 51 | dst[1] -= src[1]; \ |
| 52 | dst[2] -= src[2] |
| 53 | |
| 54 | #define vec3_scale(dst, scale) \ |
| 55 | dst[0] *= scale; \ |
| 56 | dst[1] *= scale; \ |
| 57 | dst[2] *= scale |
| 58 | |
| 59 | #define vec3_copy(dst, src) \ |
| 60 | dst[0] = src[0]; \ |
| 61 | dst[1] = src[1]; \ |
| 62 | dst[2] = src[2] |
| 63 | |
| 64 | #define vec3_normalize(dst) vec3_scale(dst,1.0f / vec3_length(dst)) |
| 65 | |
| 66 | RETRO_END_DECLS |
| 67 | |
| 68 | #endif |