note 78673 added to function.imagefilledpolygon

Just thought that 'tatlar at yahoo dot com's function has
some redundant code in it, so I tried to "improve"
it. Now you can choose a variable number of spikes.

<?php
error_reporting(E_ALL);
function drawStar($x, $y, $radius, $spikes=5) {
    // $x, $y -> Position in the image
    // $radius -> Radius of the star
    // $spikes -> Number of spikes

    $coordinates = array();
    $angel = 360 / $spikes ;

    // Get the coordinates of the outer shape of the star
    $outer_shape = array();
    for($i=0; $i<$spikes; $i++){
    	$outer_shape[$i]['x'] = $x + ($radius * cos(deg2rad(270
- $angel*$i)));
    	$outer_shape[$i]['y'] = $y + ($radius * sin(deg2rad(270
- $angel*$i)));
    }

    // Get the coordinates of the inner shape of the star
    $inner_shape = array();
    for($i=0; $i<$spikes; $i++){
    	$inner_shape[$i]['x'] = $x + (0.5*$radius *
cos(deg2rad(270-180 - $angel*$i)));
    	$inner_shape[$i]['y'] = $y + (0.5*$radius *
sin(deg2rad(270-180 - $angel*$i)));
    }

    // Bring the coordinates in the right order
    foreach($inner_shape as $key => $value){
    	if($key == (floor($spikes/2)+1))
         	break;
    	$inner_shape[] = $value;
    	unset($inner_shape[$key]);
    }

    // Reset the keys
    $i=0;
    foreach($inner_shape as $value){
    	$inner_shape[$i] = $value;
    	$i++;
    }

    // "Merge" outer and inner shape
    foreach($outer_shape as $key => $value){
         $coordinates[] = $outer_shape[$key]['x'];
         $coordinates[] = $outer_shape[$key]['y'];
         $coordinates[] = $inner_shape[$key]['x'];
         $coordinates[] = $inner_shape[$key]['y'];
    }

    // Return the coordinates
    return $coordinates ;
}

// Example
$spikes = 5;

$values = drawStar(250, 250, 200, $spikes);
$im = imagecreate(500,500);
imagecolorallocate($im,0,0,0);
$w = imagecolorallocate($im, 255, 255, 255);
imagefilledpolygon($im, $values, $spikes*2, $w);
imageGIF($im);
imagedestroy($im);
?>
----
Server IP: 217.13.201.10
Probable Submitter: 84.138.171.49
----
Manual Page -- http://www.php.net/manual/en/function.imagefilledpol
ygon.php
Edit        -- https://master
.php.net/note/edit/78673
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ttps://master.php.net/note/delete/78673/integrated
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Del: non-english -- 
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