-
Notifications
You must be signed in to change notification settings - Fork 16
/
aabb.c
42 lines (36 loc) · 970 Bytes
/
aabb.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
#include "aabb.h"
#define TOL 1e-7
int
aabb_corners_pt_inside(const vec3 min, const vec3 max, const vec3 v)
{
return (min[0]<=v[0]+TOL && v[0]-TOL<=max[0] &&
min[1]<=v[1]+TOL && v[1]-TOL<=max[1] &&
min[2]<=v[2]+TOL && v[2]-TOL<=max[2]);
}
int
aabb_midpt_pt_inside(const vec3 mid, const vec3 ext, const vec3 v)
{
return (fabs(v[0]-mid[0])<=ext[0]+TOL &&
fabs(v[1]-mid[1])<=ext[1]+TOL &&
fabs(v[2]-mid[2])<=ext[2]+TOL);
}
int
aabb_corners_inside(const vec3 min, const vec3 max,
const vec3 pmin, const vec3 pmax)
{
return (min[0]<=pmin[0] && pmax[0]<=max[0] &&
min[1]<=pmin[1] && pmax[1]<=max[1] &&
min[2]<=pmin[2] && pmax[2]<=max[2]);
}
void
aabb_corners_to_midpt(vec3 mid, vec3 ext, const vec3 min, const vec3 max)
{
VecBlend(mid, min, max, 0.5);
VecSub(ext, max, mid);
}
void
aabb_midpt_to_corners(vec3 min, vec3 max, const vec3 mid, const vec3 ext)
{
VecSub(min, mid, ext);
VecAdd(max, mid, ext);
}