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Vector subtraction functions

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Add subtraction family of functions for vectors.
This commit is contained in:
BeeverFeever
2023-12-04 21:32:19 +11:00
parent 049db64a0f
commit 7696374f1e
12 changed files with 875 additions and 0 deletions
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108
include/cglm/vec3.h
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@@ -40,6 +40,12 @@
CGLM_INLINE void glm_vec3_muladds(vec3 a, float s, vec3 dest);
CGLM_INLINE void glm_vec3_maxadd(vec3 a, vec3 b, vec3 dest);
CGLM_INLINE void glm_vec3_minadd(vec3 a, vec3 b, vec3 dest);
CGLM_INLINE void glm_vec3_subsub(vec3 a, vec3 b, vec3 dest);
CGLM_INLINE void glm_vec3_addsub(vec3 a, vec3 b, vec3 dest);
CGLM_INLINE void glm_vec3_mulsub(vec3 a, vec3 b, vec3 dest);
CGLM_INLINE void glm_vec3_mulsubs(vec3 a, float s, vec3 dest);
CGLM_INLINE void glm_vec3_maxsub(vec3 a, vec3 b, vec3 dest);
CGLM_INLINE void glm_vec3_minsub(vec3 a, vec3 b, vec3 dest);
CGLM_INLINE void glm_vec3_flipsign(vec3 v);
CGLM_INLINE void glm_vec3_flipsign_to(vec3 v, vec3 dest);
CGLM_INLINE void glm_vec3_negate_to(vec3 v, vec3 dest);
@@ -503,6 +509,108 @@ glm_vec3_minadd(vec3 a, vec3 b, vec3 dest) {
dest[2] += glm_min(a[2], b[2]);
}
/*!
* @brief sub two vectors and sub 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_vec3_subsub(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 add two vectors and sub 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_vec3_addsub(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 sub 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_vec3_mulsub(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 vector with scalar and sub result to dest
*
* it applies -= operator so dest must be initialized
*
* @param[in] a vector
* @param[in] s scalar
* @param[out] dest dest -= (a * b)
*/
CGLM_INLINE
void
glm_vec3_mulsubs(vec3 a, float s, vec3 dest) {
dest[0] -= a[0] * s;
dest[1] -= a[1] * s;
dest[2] -= a[2] * s;
}
/*!
* @brief sub max of two vectors to result/dest
*
* it applies -= operator so dest must be initialized
*
* @param[in] a vector 1
* @param[in] b vector 2
* @param[out] dest dest -= max(a, b)
*/
CGLM_INLINE
void
glm_vec3_maxsub(vec3 a, vec3 b, vec3 dest) {
dest[0] -= glm_max(a[0], b[0]);
dest[1] -= glm_max(a[1], b[1]);
dest[2] -= glm_max(a[2], b[2]);
}
/*!
* @brief sub min of two vectors to result/dest
*
* it applies -= operator so dest must be initialized
*
* @param[in] a vector 1
* @param[in] b vector 2
* @param[out] dest dest -= min(a, b)
*/
CGLM_INLINE
void
glm_vec3_minsub(vec3 a, vec3 b, vec3 dest) {
dest[0] -= glm_min(a[0], b[0]);
dest[1] -= glm_min(a[1], b[1]);
dest[2] -= glm_min(a[2], b[2]);
}
/*!
* @brief negate vector components and store result in dest
*