mirror of
https://github.com/libretro/RetroArch
synced 2025-02-01 09:32:58 +00:00
80 lines
2.3 KiB
C
80 lines
2.3 KiB
C
/* 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 <stdint.h>
|
|
#include <math.h>
|
|
|
|
#include <gfx/math/vector_3.h>
|
|
|
|
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);
|
|
}
|