| /renderAvatarsMap/generateTerrainHeightMap.php |
|---|
| @@ -0,0 +1,154 @@ |
|---|
| <?php |
| |
| ########################################################################### |
| ## Copyright (C) Wizardry and Steamworks 2015 - License: GNU GPLv3 ## |
| ########################################################################### |
| ## This is a script that uses Corrade's "getterrainheight" command in ## |
| ## order to genereate a red-channel height-map of the terrain without ## |
| ## the need to be an estate / region owner. Essentially this script can ## |
| ## be used to give an overview of the terrain height for any region. ## |
| ########################################################################### |
| |
| ########################################################################### |
| ## CONFIGURATION ## |
| ########################################################################### |
| |
| // The configuration file for this script containing the settings. |
| include_once("config.php"); |
| |
| ########################################################################### |
| ## INTERNALS ## |
| ########################################################################### |
| |
| ########################################################################### |
| ## Copyright (C) Wizardry and Steamworks 2015 - License: GNU GPLv3 ## |
| ########################################################################### |
| function wasKeyValueGet($key, $data) { |
| return array_reduce( |
| explode( |
| "&", |
| $data |
| ), |
| function($o, $p) { |
| $x = explode("=", $p); |
| return array_shift($x) != $o ? $o : array_shift($x); |
| }, |
| $key |
| ); |
| } |
| |
| ########################################################################### |
| ## Copyright (C) Wizardry and Steamworks 2015 - License: GNU GPLv3 ## |
| ########################################################################### |
| function mapValueToRange($value, $xMin, $xMax, $yMin, $yMax) { |
| return $yMin + ( |
| ( |
| $yMax - $yMin |
| ) |
| * |
| ( |
| $value - $xMin |
| ) |
| / |
| ( |
| $xMax - $xMin |
| ) |
| ); |
| } |
| |
| #### |
| # I. Get the terrain height. |
| $params = array( |
| 'command' => 'getterrainheight', |
| 'group' => $GROUP, |
| 'entity' => 'region', |
| 'password' => $PASSWORD |
| ); |
| |
| # We now escape each key and value: this is very important, because the |
| # data we send to Corrade may contain the '&' or '=' characters (we don't |
| # in this example though but this will not hurt anyone). |
| array_walk($params, |
| function(&$value, $key) { |
| $value = urlencode($key)."=".urlencode($value); |
| } |
| ); |
| $postvars = implode('&', $params); |
| |
| # Set the options, send the request and then display the outcome |
| if (!($curl = curl_init())) { |
| echo "Could not initialise CURL".PHP_EOL; |
| } |
| |
| curl_setopt($curl, CURLOPT_URL, $URL); |
| curl_setopt($curl, CURLOPT_RETURNTRANSFER, true); |
| curl_setopt($curl, CURLOPT_POST, true); |
| curl_setopt($curl, CURLOPT_POSTFIELDS, $postvars); |
| $return = curl_exec($curl); |
| curl_close($curl); |
| |
| $success = urldecode( |
| wasKeyValueGet( |
| "success", |
| $return |
| ) |
| ); |
| |
| // Unable to get the region heights? |
| if($success == 'False') return -1; |
| |
| $map = str_getcsv( |
| urldecode( |
| wasKeyValueGet( |
| "data", |
| $return |
| ) |
| ) |
| ); |
| |
| #### |
| # II. If we did not have exactly 256 x 256 array elements, then abort. |
| if(count($map) != 65536) return -1; |
| |
| // Find the maximal height of the terrain. |
| $max = max($map); |
| |
| #### |
| # III. Create a new image by encoding the elevations to the red channel. |
| $im = imagecreatetruecolor(256, 256); |
| foreach(range(0, 255) as $x) { |
| foreach(range(0, 255) as $y) { |
| $red = mapValueToRange( |
| $map[256 * $x + $y], |
| 0, |
| $max, |
| 0, |
| 256 |
| ); |
| imagesetpixel( |
| $im, |
| $x, |
| 256-$y, |
| imagecolorallocate( |
| $im, |
| $red, |
| 0, |
| 0 |
| ) |
| ); |
| } |
| } |
| |
| |
| |
| #### |
| # IV. Output the image as Base64 encoded data. |
| ob_start(); |
| imagepng($im); |
| $png = ob_get_contents(); |
| imagedestroy($im); |
| ob_end_clean(); |
| |
| echo base64_encode($png); |
| |
| ?> |
