I'm developing a Flash app in which the user traces his or her face. Done. The coordinates are being sent to a PHP page which fills a polygon. Done. Now what I would like to do is instead of filling the polygon, convert it to alpha. Can this be done? I'm attaching my code and a screenshot of what I've done so far.
Any help is appreciated.
Code: Select all
<?
/* INITIALIZE A VARIABLE */
$coordinates=substr($_GET['c'],0,strlen($_GET['c'])-1);
/* BUILD AN ARRAY */
$temp=split(',',$coordinates);
/* CREATE THE IMAGE */
$image=imagecreatetruecolor(400, 370);
/* USE A FILL */
$fill_color=imagecolorallocate($image, 255, 255, 255);
/* DRAW IT */
imagefilledpolygon($image, $temp, (count($temp)/2), $fill_color);
/* SET THE HEADER */
header('Content-type: image/png');
/* FLUSH THE IMAGE */
imagepng($image);
imagedestroy($image);
?>