func random() (r gfx.Bounds) {
f := func() float64 {
return (rand.Float64() * 2.0) - 1.0
}
size := .013123
posScale := .5123213
r.Min = math.Vec3{
f() * size,
f() * size,
f() * size,
}
r.Max = r.Min.Add(math.Vec3{
rand.Float64() * size,
rand.Float64() * size,
rand.Float64() * size,
})
// Random position
pos := math.Vec3{f(), f(), f()}
pos = pos.MulScalar(posScale)
r.Max = r.Max.Add(pos)
r.Min = r.Min.Add(pos)
return r
}
func randomAABB(size, posScale float64) (r gfx.AABB) {
f := func() float64 {
return (rand.Float64() * 2.0) - 1.0
}
max := f() * size
min := f() * size
r.Max = math.Vec3{max, max, max}
r.Min = math.Vec3{
max - min,
max - min,
max - min,
}
// Center
center := r.Center()
r.Min = r.Min.Sub(center)
r.Max = r.Max.Sub(center)
// Random position
pos := math.Vec3{f(), f(), f()}
pos = pos.MulScalar(posScale)
r.Max = r.Max.Add(pos)
r.Min = r.Min.Add(pos)
return r
}