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vec: flip sign

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This commit is contained in:
Recep Aslantas
2016-10-11 14:02:49 +03:00
parent 21f62ba9ab
commit b2e8e7c77b
1 changed files with 36 additions and 0 deletions
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36
include/cglm-vec.h
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@@ -292,6 +292,42 @@ glm_vec_scale(vec3 v, float s, vec3 dest) {
dest[2] = v[2] * s;
}
/*!
* @brief flip sign of all vec3 members
*
* @param[in] v vector
* @param[in] s scalar
* @param[out] dest destination vector
*/
CGLM_INLINE
void
glm_vec_flipsign(vec3 v) {
v[0] = -v[0];
v[1] = -v[1];
v[2] = -v[2];
}
/*!
* @brief flip sign of all vec4 members
*
* @param[in] v vector
* @param[in] s scalar
* @param[out] dest destination vector
*/
CGLM_INLINE
void
glm_vec4_flipsign(vec4 v) {
#if defined( __SSE__ ) || defined( __SSE2__ )
_mm_store_ps(v, _mm_xor_ps(_mm_load_ps(v),
_mm_set1_ps(-0.0f)));
#else
v[0] = -v[0];
v[1] = -v[1];
v[2] = -v[2];
v[3] = -v[3];
#endif
}
/*!
* @brief multiply vec4 vector with scalar
*