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vec: some useful functions (#103)

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These functions are added:
- abs(): absolute value
- fract(): fractional part
- norm_one(): L1 norm
- norm_inf(): infinity norm
- hadd(): horizontal add
- hmax(): horizontal max
This commit is contained in:
Luigi Castelli
2019-08-31 23:30:15 +02:00
committed by Recep Aslantas
parent 6af1f5af04
commit 27cc9c3351
14 changed files with 552 additions and 0 deletions
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44
include/cglm/vec3-ext.h
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@@ -24,6 +24,9 @@
CGLM_INLINE bool glm_vec3_isinf(vec3 v);
CGLM_INLINE bool glm_vec3_isvalid(vec3 v);
CGLM_INLINE void glm_vec3_sign(vec3 v, vec3 dest);
CGLM_INLINE void glm_vec3_abs(vec3 v, vec3 dest);
CGLM_INLINE void glm_vec3_fract(vec3 v, vec3 dest);
CGLM_INLINE float glm_vec3_hadd(vec3 v);
CGLM_INLINE void glm_vec3_sqrt(vec3 v, vec3 dest);
*/
@@ -211,6 +214,47 @@ glm_vec3_sign(vec3 v, vec3 dest) {
dest[2] = glm_signf(v[2]);
}
/*!
* @brief absolute value of each vector item
*
* @param[in] v vector
* @param[out] dest destination vector
*/
CGLM_INLINE
void
glm_vec3_abs(vec3 v, vec3 dest) {
dest[0] = fabsf(v[0]);
dest[1] = fabsf(v[1]);
dest[2] = fabsf(v[2]);
}
/*!
* @brief fractional part of each vector item
*
* @param[in] v vector
* @param[out] dest destination vector
*/
CGLM_INLINE
void
glm_vec3_fract(vec3 v, vec3 dest) {
dest[0] = fminf(v[0] - floorf(v[0]), 0x1.fffffep-1f);
dest[1] = fminf(v[1] - floorf(v[1]), 0x1.fffffep-1f);
dest[2] = fminf(v[2] - floorf(v[2]), 0x1.fffffep-1f);
}
/*!
* @brief vector reduction by summation
* @warning could overflow
*
* @param[in] v vector
* @return sum of all vector's elements
*/
CGLM_INLINE
float
glm_vec3_hadd(vec3 v) {
return v[0] + v[1] + v[2];
}
/*!
* @brief square root of each vector item
*