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70 lines
2.3 KiB
C
70 lines
2.3 KiB
C
/* Copyright (C) 2010-2017 The RetroArch team
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*
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* ---------------------------------------------------------------------------------------
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* The following license statement only applies to this file (vector_3.h).
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* ---------------------------------------------------------------------------------------
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*
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* Permission is hereby granted, free of charge,
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* to any person obtaining a copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef __LIBRETRO_SDK_GFX_MATH_VECTOR_3_H__
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#define __LIBRETRO_SDK_GFX_MATH_VECTOR_3_H__
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#include <stdint.h>
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#include <math.h>
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#include <retro_common_api.h>
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RETRO_BEGIN_DECLS
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typedef float vec3_t[3];
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#define vec3_dot(a, b) (a[0] * b[0] + a[1] * b[1] + a[2] * b[2])
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#define vec3_cross(dst, a, b) \
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dst[0] = a[1]*b[2] - a[2]*b[1]; \
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dst[1] = a[2]*b[0] - a[0]*b[2]; \
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dst[2] = a[0]*b[1] - a[1]*b[0]
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#define vec3_length(a) sqrtf(vec3_dot(a,a))
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#define vec3_add(dst, src) \
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dst[0] += src[0]; \
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dst[1] += src[1]; \
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dst[2] += src[2]
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#define vec3_subtract(dst, src) \
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dst[0] -= src[0]; \
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dst[1] -= src[1]; \
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dst[2] -= src[2]
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#define vec3_scale(dst, scale) \
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dst[0] *= scale; \
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dst[1] *= scale; \
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dst[2] *= scale
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#define vec3_copy(dst, src) \
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dst[0] = src[0]; \
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dst[1] = src[1]; \
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dst[2] = src[2]
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#define vec3_normalize(dst) vec3_scale(dst,1.0f / vec3_length(dst))
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RETRO_END_DECLS
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#endif
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