User:Kerik Rau

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Revision as of 08:16, 31 January 2008 by Kerik Rau (Talk | contribs)

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Code Snippets

SLURL Raster Image URL Generator

I was rather interested in the raster images provided within SL and so I decided to figure out how to replicate it in such a way that it could be incorporated into tools and/or services outside the standard fair offered by Linden Labs. At some point I may rewrite it to use PHP or offer tips to incorporate it into something like the WMS provider in MapGuide.


$TilePos = $RegionPos/256.0;
$TilePos.y = 1279.0 - $TilePos.y;

$mapURL = "" \
  + Floor($TilePos.x) + "-" + Floor($TilePos.y) + "-1-0"


<lsl> //SLURL Tile URL Generator - By Kerik Rau

//Based on the javascript from, merely an adaptation in LSL //It should only take a minute or 2 to export this into PHP or other languages

//SLURL uses WMS, I still want to look at incorporating it into something like Mapguide //I will need to look at the implementation to see if this would be easy or a pain

vector genTileVec(vector RegPos) {

   //tiles are in a grid based on the regions, so 256m = 1 tile
   RegPos /= 256.0;
   //offset provided in the javascript, really 1278 + 1 (probably 0 -> 1 index difference?)
   RegPos.y = 1279.0 - RegPos.y;
   return RegPos;


string genMapURL() {

   vector TilePos = genTileVec(llGetRegionCorner());
   //should look like
   string mapURL = "";
   mapURL += (string) llFloor(TilePos.x);
   mapURL += "-";
   mapURL += (string) llFloor(TilePos.y);
   //the 3rd value is something to do with zoom, but only 1 seems to work with this
   //the 4th value is undefined, omitting it works but I leave it in to match SLURL
   mapURL += "-1-0";
   return mapURL;


default {

       llSetText("SLURL Raster Image URL Generator\nOpens the image of the current sim\n(in a browser)", <1,1,1>, 1);
   touch_start(integer numdet)
       integer i;
       for(i = 0; i < numdet; ++i)
           llLoadURL(llDetectedKey(i), "load this page to see the sim image", genMapURL());