/**
* Calculates the angle between the two given vectors.
*
* @param Vector $lft The left vector.
* @param Vector $rgt The right vector.
* @return float Returns the angle in radians.
*/
public static function angleBetween(Vector $lft, Vector $rgt)
{
return acos($lft->dotProduct($rgt)->getValue());
}
/**
* @expectedException InvalidArgumentException
*/
public function testDotProductWithInvalidSizeVector()
{
// Arrange
$vector1 = new Vector(array(4, 5, 6));
$vector2 = new Vector(array(4, 5, 6, 7));
// Act
$vector1->dotProduct($vector2);
}
