/**
* Checks the presence of a point in the polygon
* Returns :
* 0 : Point not in polygon
* 1 : Point in polygon
* 2 : Point is a node of the polygon
*
* @see http://stackoverflow.com/questions/217578/point-in-polygon-aka-hit-test
*/
public function includes(Point $point)
{
$return = 0;
//Whole area check : does it include the center ?
$includes_point = false;
$origin = new Point(-1, -1);
$airePointAKey = count($this->points) - 1;
for ($airePointBKey = 0; $airePointBKey < count($this->points); $airePointBKey++) {
if ($point->guid == $this->points[$airePointBKey]->guid) {
$return = 2;
break;
}
if (Point::isCrossing($origin, $point, $this->points[$airePointAKey], $this->points[$airePointBKey])) {
$includes_point = !$includes_point;
}
$airePointAKey++;
if ($airePointAKey == count($this->points)) {
$airePointAKey = 0;
}
}
if ($return == 0) {
$return = (int) $includes_point;
}
return $return;
}
