public function updateCentroid()
{
if (!($count = count($this->points))) {
return;
}
$centroid = $this->space->newPoint(array_fill(0, $this->dimension, 0));
foreach ($this->points as $point) {
for ($n = 0; $n < $this->dimension; ++$n) {
$centroid->coordinates[$n] += $point->coordinates[$n];
}
}
for ($n = 0; $n < $this->dimension; ++$n) {
$this->coordinates[$n] = $centroid->coordinates[$n] / $count;
}
}
