From 2bd54dfc3ba57f11281d8943921b8a92c61b1fee Mon Sep 17 00:00:00 2001 From: Vito Caputo Date: Tue, 2 Oct 2018 00:17:51 -0700 Subject: v3f: add pointer result variants It can be convenient to supply and return a result pointer, making for more composable vector operations. --- v3f.h | 56 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 56 insertions(+) (limited to 'v3f.h') diff --git a/v3f.h b/v3f.h index b69ff37..ce80a9b 100644 --- a/v3f.h +++ b/v3f.h @@ -30,24 +30,56 @@ static inline v3f_t v3f_add(const v3f_t *a, const v3f_t *b) } +static inline v3f_t * pv3f_add(const v3f_t *a, const v3f_t *b, v3f_t *res) +{ + *res = v3f_add(a, b); + + return res; +} + + static inline v3f_t v3f_sub(const v3f_t *a, const v3f_t *b) { return (v3f_t){a->x - b->x, a->y - b->y, a->z - b->z}; } +static inline v3f_t * pv3f_sub(const v3f_t *a, const v3f_t *b, v3f_t *res) +{ + *res = v3f_sub(a, b); + + return res; +} + + static inline v3f_t v3f_mult(const v3f_t *a, const v3f_t *b) { return (v3f_t){a->x * b->x, a->y * b->y, a->z * b->z}; } +static inline v3f_t * pv3f_mult(const v3f_t *a, const v3f_t *b, v3f_t *res) +{ + *res = v3f_mult(a, b); + + return res; +} + + static inline v3f_t v3f_mult_scalar(const v3f_t *v, float scalar) { return (v3f_t){v->x * scalar, v->y * scalar, v->z * scalar}; } +static inline v3f_t * pv3f_mult_scalar(const v3f_t *v, float scalar, v3f_t *res) +{ + *res = v3f_mult_scalar(v, scalar); + + return res; +} + + static inline float v3f_dot(const v3f_t *a, const v3f_t *b) { return a->x * b->x + a->y * b->y + a->z * b->z; @@ -66,6 +98,14 @@ static inline v3f_t v3f_normalize(const v3f_t *v) } +static inline v3f_t * pv3f_normalize(const v3f_t *v, v3f_t *res) +{ + *res = v3f_normalize(v); + + return res; +} + + static inline v3f_t v3f_lerp(const v3f_t *a, const v3f_t *b, float t) { v3f_t lerp_a, lerp_b; @@ -77,6 +117,14 @@ static inline v3f_t v3f_lerp(const v3f_t *a, const v3f_t *b, float t) } +static inline v3f_t * pv3f_lerp(const v3f_t *a, const v3f_t *b, float t, v3f_t *res) +{ + *res = v3f_lerp(a, b, t); + + return res; +} + + static inline v3f_t v3f_nlerp(const v3f_t *a, const v3f_t *b, float t) { v3f_t lerp = v3f_lerp(a, b, t); @@ -84,4 +132,12 @@ static inline v3f_t v3f_nlerp(const v3f_t *a, const v3f_t *b, float t) return v3f_normalize(&lerp); } + +static inline v3f_t * pv3f_nlerp(const v3f_t *a, const v3f_t *b, float t, v3f_t *res) +{ + *res = v3f_nlerp(a, b, t); + + return res; +} + #endif -- cgit v1.2.3