<?php   /* Images © Charles Chandler http://qdl.scs-inc.us/?top=12811 */   /* http://127.0.0.1/SCS/Other/QuickDisclosure/2ndParty/Images/Charles/Plasmas/GIF_Build.php */   function SortByZ($pt1, $pt2) { if ($pt1['z'] == $pt2['z']) { return 0; } elseif ($pt1['z'] < $pt2['z']) { return -1; } else { return 1; } }   include('Functions.php'); define('max32bitSignedInt', pow(2, 31)); $minX = max32bitSignedInt; $minY = max32bitSignedInt; $maxX = -max32bitSignedInt; $maxY = -max32bitSignedInt; $showAxes = 'yz'; $showAxes = 'xz'; $showAxes = 'xy'; echo '$showAxes: '.$showAxes.'<br />'; foreach(DirList('Points') as $file) { $img = ImageCreateFromGIF('Blank.gif'); $red = ImageColorAllocate($img, 255, 0, 0); $blue = ImageColorAllocate($img, 0, 0, 255); include('Points/'.$file); usort($points, 'SortByZ'); foreach($points as $pt) { $minX = min($minX, $pt['x']); $maxX = max($maxX, $pt['x']); $minY = min($minY, $pt['y']); $maxY = max($maxY, $pt['y']); // Shift the numbers into the positive range for all // of them, and multiple by 10, for a 840x720 image. $color = ($pt['r']) ? $blue : $red; if ($showAxes == 'xy') { $x = ($pt['x'] + 42) * 10; $y = ($pt['y'] + 36) * 10; ImageSetPixel($img, $x, $y, $color); } elseif ($showAxes == 'xz') { $x = ($pt['x'] + 42) * 10; $z = ($pt['z'] + 36) * 10; ImageSetPixel($img, $x, $z, $color); } elseif ($showAxes == 'yz') { $y = ($pt['y'] + 41) * 10; $z = ($pt['z'] + 36) * 10; ImageSetPixel($img, $y, $z, $color); } } ImageGIF($img, 'Images/'.$showAxes.StripOneTailer($file, '.php').'.gif'); echo '$minX: '.$minX.'<br />'; echo '$maxX: '.$maxX.'<br />'; echo '$minY: '.$minY.'<br />'; echo '$maxY: '.$maxY.'<br />'; }   ?>