func (q *quad) recalculate() {
var (
pos vect.V
mass float64
)
for _, n := range q.children {
if n == nil {
continue
}
pos = pos.Add(n.Position().Mul(n.Mass()))
mass += n.Mass()
}
q.position = pos.Div(mass)
q.mass = mass
}
func (q *quad) recalculate() {
var (
pos vect.V
mass float64
)
for _, n := range q.children {
if n == nil {
continue
}
pos = pos.Add(n.Position().Mul(n.Mass()))
mass += n.Mass()
}
q.position = pos.Div(mass)
q.mass = mass
}
