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vec: add addadd, subadd and muladd helpers

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Recep Aslantas
2018-04-13 15:46:43 +03:00
parent d841f8809d
commit c05f58a169
10 changed files with 286 additions and 2 deletions
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54
include/cglm/vec3.h
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@@ -37,6 +37,9 @@
CGLM_INLINE void glm_vec_scale_as(vec3 v, float s, vec3 dest);
CGLM_INLINE void glm_vec_div(vec3 a, vec3 b, vec3 dest);
CGLM_INLINE void glm_vec_divs(vec3 a, float s, vec3 dest);
CGLM_INLINE void glm_vec_addadd(vec3 a, vec3 b, vec3 dest);
CGLM_INLINE void glm_vec_subadd(vec3 a, vec3 b, vec3 dest);
CGLM_INLINE void glm_vec_muladd(vec3 a, vec3 b, vec3 dest);
CGLM_INLINE void glm_vec_flipsign(vec3 v);
CGLM_INLINE void glm_vec_inv(vec3 v);
CGLM_INLINE void glm_vec_inv_to(vec3 v, vec3 dest);
@@ -335,6 +338,57 @@ glm_vec_divs(vec3 v, float s, vec3 dest) {
dest[2] = v[2] / s;
}
/*!
* @brief add two vectors and add result to sum
*
* it applies += operator so dest must be initialized
*
* @param[in] a vector 1
* @param[in] b vector 2
* @param[out] dest dest += (a + b)
*/
CGLM_INLINE
void
glm_vec_addadd(vec3 a, vec3 b, vec3 dest) {
dest[0] += a[0] + b[0];
dest[1] += a[1] + b[1];
dest[2] += a[2] + b[2];
}
/*!
* @brief sub two vectors and add result to dest
*
* it applies += operator so dest must be initialized
*
* @param[in] a vector 1
* @param[in] b vector 2
* @param[out] dest dest += (a + b)
*/
CGLM_INLINE
void
glm_vec_subadd(vec3 a, vec3 b, vec3 dest) {
dest[0] += a[0] - b[0];
dest[1] += a[1] - b[1];
dest[2] += a[2] - b[2];
}
/*!
* @brief mul two vectors and add result to dest
*
* it applies += operator so dest must be initialized
*
* @param[in] a vector 1
* @param[in] b vector 2
* @param[out] dest dest += (a * b)
*/
CGLM_INLINE
void
glm_vec_muladd(vec3 a, vec3 b, vec3 dest) {
dest[0] += a[0] * b[0];
dest[1] += a[1] * b[1];
dest[2] += a[2] * b[2];
}
/*!
* @brief flip sign of all vec3 members
*