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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 |