From f8982a89d7c707daf7d55af4d6f2ae0d607dda44 Mon Sep 17 00:00:00 2001 From: twinaphex Date: Sun, 15 May 2016 06:46:41 +0200 Subject: [PATCH] Add vector_3.c --- libretro-common/gfx/math/vector_3.c | 79 +++++++++++++++++++++ libretro-common/include/gfx/math/vector_3.h | 45 ++++++++++++ 2 files changed, 124 insertions(+) create mode 100644 libretro-common/gfx/math/vector_3.c create mode 100644 libretro-common/include/gfx/math/vector_3.h diff --git a/libretro-common/gfx/math/vector_3.c b/libretro-common/gfx/math/vector_3.c new file mode 100644 index 0000000000..1ec04acab7 --- /dev/null +++ b/libretro-common/gfx/math/vector_3.c @@ -0,0 +1,79 @@ +/* Copyright (C) 2010-2016 The RetroArch team + * + * --------------------------------------------------------------------------------------- + * The following license statement only applies to this file (vector_3.c). + * --------------------------------------------------------------------------------------- + * + * Permission is hereby granted, free of charge, + * to any person obtaining a copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation the rights to + * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, + * and to permit persons to whom the Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, + * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. + * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, + * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + */ + +#include +#include + +#include + +float vec3_dot(const float *a, const float *b) +{ + return a[0] * b[0] + a[1] * b[1] + a[2] * b[2]; +} + +void vec3_cross(float* dst, const float *a, const float *b) +{ + dst[0] = a[1]*b[2] - a[2]*b[1]; + dst[1] = a[2]*b[0] - a[0]*b[2]; + dst[2] = a[0]*b[1] - a[1]*b[0]; +} + +float vec3_length(const float *a) +{ + float length_sq = vec3_dot(a,a); + float length = sqrtf(length_sq); + return length; +} + +void vec3_add(float *dst, const float *src) +{ + dst[0] += src[0]; + dst[1] += src[1]; + dst[2] += src[2]; +} + +void vec3_subtract(float *dst, const float *src) +{ + dst[0] -= src[0]; + dst[1] -= src[1]; + dst[2] -= src[2]; +} + +void vec3_scale(float *dst, const float scale) +{ + dst[0] *= scale; + dst[1] *= scale; + dst[2] *= scale; +} + +void vec3_copy(float *dst, const float *src) +{ + dst[0] = src[0]; + dst[1] = src[1]; + dst[2] = src[2]; +} + +void vec3_normalize(float *dst) +{ + float length = vec3_length(dst); + vec3_scale(dst,1.0f/length); +} diff --git a/libretro-common/include/gfx/math/vector_3.h b/libretro-common/include/gfx/math/vector_3.h new file mode 100644 index 0000000000..cb94a9fc71 --- /dev/null +++ b/libretro-common/include/gfx/math/vector_3.h @@ -0,0 +1,45 @@ +/* Copyright (C) 2010-2016 The RetroArch team + * + * --------------------------------------------------------------------------------------- + * The following license statement only applies to this file (vector_3.h). + * --------------------------------------------------------------------------------------- + * + * Permission is hereby granted, free of charge, + * to any person obtaining a copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation the rights to + * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, + * and to permit persons to whom the Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, + * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. + * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, + * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + */ + +#ifndef __LIBRETRO_SDK_GFX_MATH_VECTOR_3_H__ +#define __LIBRETRO_SDK_GFX_MATH_VECTOR_3_H__ + +#include + +float vec3_dot(const float *a, const float *b); + +void vec3_cross(float* dst, const float *a, const float *b); + +float vec3_length(const float *a); + +void vec3_add(float *dst, const float *src); + +void vec3_subtract(float *dst, const float *src); + +void vec3_scale(float *dst, const float scale); + +void vec3_copy(float *dst, const float *src); + +void vec3_normalize(float *dst); + +#endif +