/**
* Test if the quadrilateral is a parallelogram
*
* @return bool
*/
public function isParallelogram()
{
$centerdiag1 = $this->getFirstDiagonal();
$centerdiag2 = $this->getSecondDiagonal();
return (bool) Maths::areSamePoint($centerdiag1->getCenter(), $centerdiag2->getCenter());
}
/**
* Test if a vector is null : [~0] = [A==B]
*
* @return bool
*/
public function isNull()
{
return (bool) Maths::areSamePoint($this->getPointA(), $this->getPointB());
}
