function __construct(Color $color1, Color $color2, $direction = 0)
{
$this->direction = $direction;
$cs = $color1->getRGBA();
$cd = $color2->getRGBA();
$cf = array($cs[0], $cs[1], $cs[2]);
$cl = array($cd[0], $cd[1], $cd[2]);
$cd = array($cl[0] - $cf[0], $cl[1] - $cf[1], $cl[2] - $cf[2]);
$this->colors = array('first' => $cf, 'last' => $cl, 'delta' => $cd);
}
/**
* @brief Helper function to assign a color value from an existing color
*
* @param Color $color The color to assign
*/
function setColor(Color $color)
{
$this->setRGBA($color->getRGBA());
}
