public static function getRotationMetrics(Collection $collection)
{
$total = 0;
$locations = array_values($collection->getAll());
$count = count($locations);
if ($count > 1) {
// We'll skip the first
for ($i = 1; $i < $count; $i++) {
/** @var Location Location */
$loc = $locations[$i];
/** @var Location Location */
$locLast = $locations[$i - 1];
// x2 - x1 / (y2 + y1)
$total += ($loc->getLatitude() - $locLast->getLatitude()) / ($loc->getLongitude() + $locLast->getLongitude());
}
}
return $total;
}
