function createVisual($con)
{
$nodes = checkNodesGlobalVariable($con);
$products = checkProductsGlobalVariable($con);
$pairs = '';
$visual = '';
$betweenness = getBetweenness();
foreach ($nodes as $row) {
$visual .= 'n' . $row['id'] . '{';
//set node visual properties
$visual .= 'shape:dot, color:' . genColor($row['links'], $betweenness[0], $betweenness[1]) . ', ';
// set serves and requests
if ($row['serves']) {
$visual .= 'serves: ' . str_replace('^', ', ', $row['serves']) . ',';
}
if ($row['requests']) {
$visual .= ' requests: ' . str_replace('^', ', ', $row['requests']) . ',';
}
// set wealth
$visual .= ' money: ' . $row['money'];
// add new-lines
$visual .= "}\n\n";
// set links
if (isset($row['links'])) {
foreach (explode(',', $row['links']) as $value) {
// hacky solution, but avoids duplicates by searching for a simple |n0-n1| pairs in a string
if (strpos($pairs, '|n' . $value . '-n' . $row['id'] . '|') === false) {
$pairs .= '|n' . $row['id'] . '-n' . $value . '|';
$visual .= 'n' . $row['id'] . "--n{$value} {color: #777777, weight: 1.5}\n\n";
}
}
}
}
return $visual;
}
$b = $g = $r;
}
$_r = mt_rand($br, $r);
$_g = mt_rand($bg, $g);
$_b = mt_rand($bb, $b);
return imagecolorallocatealpha($image, $_r, $_g, $_b, $a);
}
captcha();
$width = 250;
$height = 60;
$font = array('RiseStarHandRegular.otf');
$image = imagecreatetruecolor($width, $height);
$text = $_SESSION['captcha'];
$bg = imagecolorallocate($image, 255, 255, 255);
imagefilledrectangle($image, 1, 1, $width - 2, $height - 2, $bg);
imagealphablending($image, true);
$pa = 8;
for ($a = 1; $a <= $pa; $a++) {
$p = $a / $pa;
imageline($image, 1, $height * $p, $width - 2, $height * $p, imagecolorallocate($image, 127, 186, 190));
imageline($image, $width * $p, 1, $width * $p, $height - 2, imagecolorallocate($image, 127, 186, 190));
}
imagettftext($image, $height * 0.4, 0, mt_rand($width * 0.1, $width * 0.3), mt_rand($height * 0.33, $height * 0.85), genColor(80), $font[array_rand($font)], substr($text, 0, 2));
imagettftext($image, $height * 0.4, 0, mt_rand($width * 0.4, $width * 0.55), mt_rand($height * 0.33, $height * 0.85), genColor(100), $font[array_rand($font)], substr($text, 2, 2));
imagettftext($image, $height * 0.4, 0, mt_rand($width * 0.6, $width * 0.8), mt_rand($height * 0.33, $height * 0.85), genColor(100), $font[array_rand($font)], substr($text, 4, 2));
for ($i = 0; $i < 8; $i++) {
imagefilledarc($image, mt_rand($width * 0.15, $width * 0.8), mt_rand($height * 0.15, $height * 0.8), $height * 0.4, $height * 0.4, 0, 360, genColor(255, 180, 255, 110, 255, 90, 110), IMG_ARC_PIE);
}
header("Content-type: image/png");
imagepng($image);
imagedestroy($image);
