/**
* Construct rotation matrix from rotation (in degrees) and optional
* center point.
*
* @param int $rotation
* @param ezcGraphCoordinate $center
* @return ezcGraphTransformation
*/
public function __construct($rotation = 0, ezcGraphCoordinate $center = null)
{
$this->rotation = (double) $rotation;
if ($center === null) {
$this->center = new ezcGraphCoordinate(0, 0);
$clockwiseRotation = deg2rad($rotation);
$rotationMatrixArray = array(array(cos($clockwiseRotation), -sin($clockwiseRotation), 0), array(sin($clockwiseRotation), cos($clockwiseRotation), 0), array(0, 0, 1));
return parent::__construct($rotationMatrixArray);
}
parent::__construct();
$this->center = $center;
$this->multiply(new ezcGraphTranslation($center->x, $center->y));
$this->multiply(new ezcGraphRotation($rotation));
$this->multiply(new ezcGraphTranslation(-$center->x, -$center->y));
}
/**
* Transform vector using transformation matrix
*
* @param ezcGraphTransformation $transformation
* @return ezcGraphVector
*/
public function transform(ezcGraphTransformation $transformation)
{
$result = $transformation->transformCoordinate($this);
$this->x = $result->x;
$this->y = $result->y;
return $this;
}
/**
* Constructor
*
* @param float $x
* @param float $y
* @return void
* @ignore
*/
public function __construct($x = 0.0, $y = 0.0)
{
parent::__construct(array(array(1, 0, $x), array(0, 1, $y), array(0, 0, 1)));
}
