func (t *Table) Add(s gfx.Boundable) {
sb := s.Bounds()
t.eachIndex(sb, func(idx int) {
fmt.Println("add", idx)
t.Data[idx] = append(t.Data[idx], s)
})
}
func (ff frustum) Contains(bb gfx.Boundable) bool {
f := math.Mat4(ff)
b := bb.Bounds()
// Every corner of the 3D rectangle must be in the frustum -- thus we can
// say that if no corner is in the frustum, the rectangle is not contained.
var inside bool
for _, corner := range b.Corners() {
if _, inside = f.Project(corner); !inside {
return false
}
}
return true
}
func (ff frustum) Intersects(bb gfx.Boundable) bool {
f := math.Mat4(ff)
b := bb.Bounds()
// If any single corner of the 3D rectangle is in the frustum, then it is
// intersecting.
var inside bool
for _, corner := range b.Corners() {
if _, inside = f.Project(corner); inside {
return true
}
}
return false
}
func (t *Table) Remove(s gfx.Boundable) (ok bool) {
sb := s.Bounds()
t.eachIndex(sb, func(idx int) {
found := -1
for i, v := range t.Data[idx] {
if v == s {
found = i
break
}
}
if found == -1 {
ok = false
return
}
t.Data[idx] = append(t.Data[idx][:found], t.Data[idx][found+1:]...)
})
ok = true
return
}
func (s sphere) Contains(b gfx.Boundable) bool {
return b.Bounds().InSphere(math.Sphere(s))
}
func (s sphere) Intersects(b gfx.Boundable) bool {
return math.Sphere(s).OverlapsRect3(b.Bounds())
}
func (c rect) Contains(b gfx.Boundable) bool {
return b.Bounds().In(math.Rect3(c))
}
func (c rect) Intersects(b gfx.Boundable) bool {
return math.Rect3(c).Overlaps(b.Bounds())
}