/**
* Computes the vector triple product of three vectors.
*
* @api
* @param self $b The second vector of the triple product.
* @param self $c The third vector of the triple product.
* @return self The vector triple product of the three vectors.
* @throws Exception if the vectors are not 3-dimensional.
* @throws Exception if the vectors are not in the same vector space.
* @see self::_checkVectorSpace() For exception information.
*/
public function vectorTripleProduct(self $b, self $c)
{
return $this->crossProduct($b->crossProduct($c));
}
/**
* Verify that cross product fails with two-dimensional vectors.
*
* @test
* @uses \Nubs\Vectorix\Vector::__construct
* @uses \Nubs\Vectorix\Vector::components
* @uses \Nubs\Vectorix\Vector::dimension
* @uses \Nubs\Vectorix\Vector::isSameDimension
* @uses \Nubs\Vectorix\Vector::isSameVectorSpace
* @uses \Nubs\Vectorix\Vector::_checkVectorSpace
* @covers ::crossProduct
* @expectedException Exception
* @expectedExceptionMessage Both vectors must be 3-dimensional
*/
public function crossProductOfTwoDimensionalVectors()
{
$a = new Vector([7, 2]);
$b = new Vector([1, 9]);
$a->crossProduct($b);
}
