/**
* Calculates the cross product between this vector and the given vector.
*
* @param Vector3 $vector The vector to calculate with.
* @return Vector3
*/
public function crossProduct(Vector3 $vector)
{
$x = BigNumberUtils::multiply($this->getY(), $vector->getZ());
$x->subtract(BigNumberUtils::multiply($this->getZ(), $vector->getY()));
$y = BigNumberUtils::multiply($this->getZ(), $vector->getX());
$y->subtract(BigNumberUtils::multiply($this->getX(), $vector->getZ()));
$z = BigNumberUtils::multiply($this->getX(), $vector->getY());
$z->subtract(BigNumberUtils::multiply($this->getY(), $vector->getX()));
return new Vector3($x, $y, $z);
}
public function testMultiplyWithMutableTrue()
{
// Arrange
$number1 = new BigNumber('0.123456789');
$number2 = new BigNumber(2);
// Act
$result = Utils::multiply($number1, $number2, 10, true);
// Assert
$this->assertInstanceOf('PHP\\Math\\BigNumber\\BigNumber', $result);
$this->assertEquals('0.2469135780', (string) $result);
$this->assertEquals('0.123456789', $number1);
$this->assertEquals('2.0000000000', $number2);
$this->assertTrue($result->isMutable());
}
