/**
* construct point from vector (pointing towards the point).
*/
public static function fromVector(Vector $vector)
{
$point = new Point();
$point->x($vector->x);
$point->y($vector->y);
$point->z($vector->z);
return $point;
}
public static function fromPoints(Point $point_a, Point $point_b)
{
$vector = new Vector();
$vector->xyz($point_b->x() - $point_a->x(), $point_b->y() - $point_a->y(), $point_b->z() - $point_a->z());
return $vector;
}
