/**
* @covers tarcisio\p2d\Math::angleBetween
* @covers tarcisio\p2d\Math::angleBetweenPoints
*/
public function testAngleBetween()
{
$p1 = new Point(0, 0);
$p2 = new Point(20, 20);
$this->assertEquals(0.785398163, Math::angleBetween($p1->x, $p1->y, $p2->x, $p2->y), '', 0.001);
$this->assertEquals(0.785398163, Math::angleBetweenPoints($p1, $p2), '', 0.001);
}
/**
* Find the angle of a segment from $p1 -> $p2 in radians
*/
public static function angleBetweenPoints($p1, $p2)
{
return Math::angleBetween($p1->x, $p1->y, $p2->x, $p2->y);
}