func octreeMesh(octree *gfx.Octant) *gfx.Mesh {
m := new(gfx.Mesh)
// Slice to zero.
m.Vertices = m.Vertices[:0]
m.Colors = m.Colors[:0]
bci := -1
nextBC := func() gfx.Color {
bci++
switch bci % 3 {
case 0:
return gfx.Color{1, 0, 0, 0}
case 1:
return gfx.Color{0, 1, 0, 0}
case 2:
return gfx.Color{0, 0, 1, 0}
}
panic("never here.")
}
var add func(o *gfx.Octant)
add = func(o *gfx.Octant) {
// Add vertices.
before := len(m.Vertices)
appendCube(m, float32(o.AABB.Size().X/2.0))
center := o.AABB.Center()
for i, v := range m.Vertices[before:] {
vert := v.Vec3()
vert = vert.Add(center)
m.Vertices[before+i] = gfx.ConvertVec3(vert)
}
fmt.Println("Octant", o.Depth, "-", len(o.Objects), "objects")
for s := range o.Objects {
before := len(m.Vertices)
appendCube(m, float32(s.AABB().Size().X/2.0))
center := s.AABB().Center()
//fmt.Println(center, s.AABB())
for i, v := range m.Vertices[before:] {
vert := v.Vec3()
vert = vert.Add(center)
m.Vertices[before+i] = gfx.ConvertVec3(vert)
}
}
for _, octant := range o.Octants {
if octant != nil {
add(octant)
}
}
}
add(octree)
for _ = range m.Vertices {
// Add barycentric coordinates.
m.Colors = append(m.Colors, nextBC())
}
return m
}
func RTreeMesh(tree *rtree.Tree, level int) *gfx.Mesh {
m := new(gfx.Mesh)
bci := -1
nextBC := func() gfx.Color {
bci++
switch bci % 3 {
case 0:
return gfx.Color{1, 0, 0, 0}
case 1:
return gfx.Color{0, 1, 0, 0}
case 2:
return gfx.Color{0, 0, 1, 0}
}
panic("never here.")
}
nodes := 0
var add func(n *rtree.Node)
add = func(n *rtree.Node) {
//if nodes > 100 {
// return
//}
nodes++
if n == nil {
return
}
if level == 0 || nodes == level {
// Add vertices.
m.Vertices = Rect3LineVerts(n.Bounds(), m.Vertices)
}
/*for _, s := range n.Objects {
c := s.Bounds().Center()
sz := 0.005
sb := math.Rect3{
Min: math.Vec3Zero.AddScalar(-sz).Add(c),
Max: math.Vec3Zero.AddScalar(sz).Add(c),
}
m.Vertices = Rect3LineVerts(sb, m.Vertices)
}*/
for _, c := range n.Children {
add(c)
}
}
add(tree.Root())
fmt.Println(tree.Count(), "objects", nodes, "nodes")
for _ = range m.Vertices {
// Add barycentric coordinates.
m.Colors = append(m.Colors, nextBC())
}
return m
}