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vec: minnadd and maxadd helpers

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Recep Aslantas
2018-11-29 10:50:24 +03:00
parent 4e08b7e335
commit 6d6954b208
9 changed files with 184 additions and 18 deletions
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26
include/cglm/box.h
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@@ -23,7 +23,7 @@
CGLM_INLINE
void
glm_aabb_transform(vec3 box[2], mat4 m, vec3 dest[2]) {
vec3 v[2], xa, xb, ya, yb, za, zb, tmp;
vec3 v[2], xa, xb, ya, yb, za, zb;
glm_vec3_scale(m[0], box[0][0], xa);
glm_vec3_scale(m[0], box[1][0], xb);
@@ -34,21 +34,17 @@ glm_aabb_transform(vec3 box[2], mat4 m, vec3 dest[2]) {
glm_vec3_scale(m[2], box[0][2], za);
glm_vec3_scale(m[2], box[1][2], zb);
/* min(xa, xb) + min(ya, yb) + min(za, zb) + translation */
glm_vec3_minv(xa, xb, v[0]);
glm_vec3_minv(ya, yb, tmp);
glm_vec3_add(v[0], tmp, v[0]);
glm_vec3_minv(za, zb, tmp);
glm_vec3_add(v[0], tmp, v[0]);
glm_vec3_add(v[0], m[3], v[0]);
/* translation + min(xa, xb) + min(ya, yb) + min(za, zb) */
glm_vec3(m[3], v[0]);
glm_vec3_minadd(xa, xb, v[0]);
glm_vec3_minadd(ya, yb, v[0]);
glm_vec3_minadd(za, zb, v[0]);
/* max(xa, xb) + max(ya, yb) + max(za, zb) + translation */
glm_vec3_maxv(xa, xb, v[1]);
glm_vec3_maxv(ya, yb, tmp);
glm_vec3_add(v[1], tmp, v[1]);
glm_vec3_maxv(za, zb, tmp);
glm_vec3_add(v[1], tmp, v[1]);
glm_vec3_add(v[1], m[3], v[1]);
/* translation + max(xa, xb) + max(ya, yb) + max(za, zb) */
glm_vec3(m[3], v[1]);
glm_vec3_maxadd(xa, xb, v[1]);
glm_vec3_maxadd(ya, yb, v[1]);
glm_vec3_maxadd(za, zb, v[1]);
glm_vec3_copy(v[0], dest[0]);
glm_vec3_copy(v[1], dest[1]);