/**
*
*/
public function testOperations()
{
$p1 = new Point2d(2, 5);
$p2 = new Point2d(1, 2);
$p3 = new Point2d(1, 3);
$p4 = new Point2d(1, 3);
$p5 = new Point2d(1, 0);
$v1 = new Vector2d(1, 2);
$v2 = new Vector2d(1, 3);
$this->assertEquals($p3, $p4);
$this->assertEquals($p3, Point2d::subtract($p1, $v1));
$this->assertEquals($p1, Point2d::add($p2, $v2));
$this->assertEquals($v2, Point2d::subtractP($p1, $p2));
$p1->offset(-1, -5);
$this->assertEquals($p1, $p5);
}
/**
* Apply a vector on each point and return a new instance of Polygon
*
* @param Vector2d $vector
* @return Polygon
*/
public function translate(Vector2d $vector)
{
$buffer = clone $this;
foreach ($buffer->_points as $index => $point) {
$buffer->setPoint($index, Point2d::add($point, $vector));
}
return $buffer;
}
