function testInvert()
{
$unit = Math_Matrix::makeUnit(4);
$q = new Math_Matrix($this->data);
$p = $q->clone();
$q->invert();
$p->multiply($q);
$this->assertEquals($unit->getData(), $p->getData());
}
/**
* Returns the identity matrix of the given size. An alias of Math_Matrix::makeUnit()
*
* @static
* @access public
* @param integer $size number of rows and columns in the generated matrix
* @return object a Math_Matrix instance
* @see Math_Matrix::makeUnit()
*/
function &makeIdentity($size)
{
/*{{{*/
return Math_Matrix::makeUnit($size);
}
function testMakeUnit()
{
$data = array(array(1.0, 0.0, 0.0), array(0.0, 1.0, 0.0), array(0.0, 0.0, 1.0));
$q = Math_Matrix::makeUnit(3);
$this->assertEquals($data, $q->getData());
}