frillrun/include/cglm/vec3-ext.h
2024-08-24 00:47:58 -04:00

273 lines
5.3 KiB
C

/*
* Copyright (c), Recep Aslantas.
*
* MIT License (MIT), http://opensource.org/licenses/MIT
* Full license can be found in the LICENSE file
*/
/*!
* @brief SIMD like functions
*/
/*
Functions:
CGLM_INLINE void glm_vec3_broadcast(float val, vec3 d);
CGLM_INLINE void glm_vec3_fill(vec3 v, float val);
CGLM_INLINE bool glm_vec3_eq(vec3 v, float val);
CGLM_INLINE bool glm_vec3_eq_eps(vec3 v, float val);
CGLM_INLINE bool glm_vec3_eq_all(vec3 v);
CGLM_INLINE bool glm_vec3_eqv(vec3 a, vec3 b);
CGLM_INLINE bool glm_vec3_eqv_eps(vec3 a, vec3 b);
CGLM_INLINE float glm_vec3_max(vec3 v);
CGLM_INLINE float glm_vec3_min(vec3 v);
CGLM_INLINE bool glm_vec3_isnan(vec3 v);
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);
*/
#ifndef cglm_vec3_ext_h
#define cglm_vec3_ext_h
#include "common.h"
#include "util.h"
/*!
* @brief fill a vector with specified value
*
* @param[in] val value
* @param[out] d dest
*/
CGLM_INLINE
void
glm_vec3_broadcast(float val, vec3 d) {
d[0] = d[1] = d[2] = val;
}
/*!
* @brief fill a vector with specified value
*
* @param[out] v dest
* @param[in] val value
*/
CGLM_INLINE
void
glm_vec3_fill(vec3 v, float val) {
v[0] = v[1] = v[2] = val;
}
/*!
* @brief check if vector is equal to value (without epsilon)
*
* @param[in] v vector
* @param[in] val value
*/
CGLM_INLINE
bool
glm_vec3_eq(vec3 v, float val) {
return v[0] == val && v[0] == v[1] && v[0] == v[2];
}
/*!
* @brief check if vector is equal to value (with epsilon)
*
* @param[in] v vector
* @param[in] val value
*/
CGLM_INLINE
bool
glm_vec3_eq_eps(vec3 v, float val) {
return fabsf(v[0] - val) <= GLM_FLT_EPSILON
&& fabsf(v[1] - val) <= GLM_FLT_EPSILON
&& fabsf(v[2] - val) <= GLM_FLT_EPSILON;
}
/*!
* @brief check if vectors members are equal (without epsilon)
*
* @param[in] v vector
*/
CGLM_INLINE
bool
glm_vec3_eq_all(vec3 v) {
return glm_vec3_eq_eps(v, v[0]);
}
/*!
* @brief check if vector is equal to another (without epsilon)
*
* @param[in] a vector
* @param[in] b vector
*/
CGLM_INLINE
bool
glm_vec3_eqv(vec3 a, vec3 b) {
return a[0] == b[0]
&& a[1] == b[1]
&& a[2] == b[2];
}
/*!
* @brief check if vector is equal to another (with epsilon)
*
* @param[in] a vector
* @param[in] b vector
*/
CGLM_INLINE
bool
glm_vec3_eqv_eps(vec3 a, vec3 b) {
return fabsf(a[0] - b[0]) <= GLM_FLT_EPSILON
&& fabsf(a[1] - b[1]) <= GLM_FLT_EPSILON
&& fabsf(a[2] - b[2]) <= GLM_FLT_EPSILON;
}
/*!
* @brief max value of vector
*
* @param[in] v vector
*/
CGLM_INLINE
float
glm_vec3_max(vec3 v) {
float max;
max = v[0];
if (v[1] > max)
max = v[1];
if (v[2] > max)
max = v[2];
return max;
}
/*!
* @brief min value of vector
*
* @param[in] v vector
*/
CGLM_INLINE
float
glm_vec3_min(vec3 v) {
float min;
min = v[0];
if (v[1] < min)
min = v[1];
if (v[2] < min)
min = v[2];
return min;
}
/*!
* @brief check if all items are NaN (not a number)
* you should only use this in DEBUG mode or very critical asserts
*
* @param[in] v vector
*/
CGLM_INLINE
bool
glm_vec3_isnan(vec3 v) {
return isnan(v[0]) || isnan(v[1]) || isnan(v[2]);
}
/*!
* @brief check if all items are INFINITY
* you should only use this in DEBUG mode or very critical asserts
*
* @param[in] v vector
*/
CGLM_INLINE
bool
glm_vec3_isinf(vec3 v) {
return isinf(v[0]) || isinf(v[1]) || isinf(v[2]);
}
/*!
* @brief check if all items are valid number
* you should only use this in DEBUG mode or very critical asserts
*
* @param[in] v vector
*/
CGLM_INLINE
bool
glm_vec3_isvalid(vec3 v) {
return !glm_vec3_isnan(v) && !glm_vec3_isinf(v);
}
/*!
* @brief get sign of 32 bit float as +1, -1, 0
*
* Important: It returns 0 for zero/NaN input
*
* @param v vector
*/
CGLM_INLINE
void
glm_vec3_sign(vec3 v, vec3 dest) {
dest[0] = glm_signf(v[0]);
dest[1] = glm_signf(v[1]);
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]), 0.999999940395355224609375f);
dest[1] = fminf(v[1] - floorf(v[1]), 0.999999940395355224609375f);
dest[2] = fminf(v[2] - floorf(v[2]), 0.999999940395355224609375f);
}
/*!
* @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
*
* @param[in] v vector
* @param[out] dest destination vector
*/
CGLM_INLINE
void
glm_vec3_sqrt(vec3 v, vec3 dest) {
dest[0] = sqrtf(v[0]);
dest[1] = sqrtf(v[1]);
dest[2] = sqrtf(v[2]);
}
#endif /* cglm_vec3_ext_h */