/**
* Calculates distances
*
* @param DistanceNode $node
*/
protected function calculateDistances(DistanceNode $node)
{
$ranges = $this->calculateRanges();
foreach ($this->nodes as $neighbor) {
$deltas = array();
foreach ($this->schema->getFields() as $field) {
$range = $ranges[$field];
$delta = $neighbor->getField($field) - $node->getField($field);
$delta = $delta / $range;
$deltas[$field] = $delta;
}
$total = 0;
foreach ($deltas as $delta) {
$total += $delta * $delta;
}
$neighbor->setDistance(sqrt($total));
}
}
