// CalculateBounds calculates a new axis aligned bounding box for this mesh.
//
// The mesh's write lock must be held for this method to operate safely.
func (m *Mesh) CalculateBounds() {
var bb math.Rect3
if len(m.Vertices) > 0 {
for _, v32 := range m.Vertices {
v := v32.Vec3()
bb.Min = bb.Min.Min(v)
bb.Max = bb.Max.Max(v)
}
}
m.AABB = bb
}
// Bounds implements the Spatial interface. The returned bounding box takes
// into account all of the mesh's bounding boxes, transformed into world space.
//
// This method properly read-locks the object.
func (o *Object) Bounds() math.Rect3 {
var b math.Rect3
o.RLock()
for i, m := range o.Meshes {
if i == 0 {
b = m.Bounds()
} else {
b = b.Union(m.Bounds())
}
}
if o.Transform != nil {
b.Min = o.Transform.ConvertPos(b.Min, LocalToWorld)
b.Max = o.Transform.ConvertPos(b.Max, LocalToWorld)
b = b.Union(b)
}
o.RUnlock()
return b
}