[ka-Map-users] kaMap - setTile function - uses openstreetmap servers.

[Ionut Muntean]

kaMap - setTile function - uses openstreetmap servers.

File that replaces init.php. Paste the code below in a file on your 
server and load it at run time instead of init.php.

/*init*/
aszScales = new 
Array('110936068.18103503','55468034.09051751','27734017.045258757',
'13867008.522629378','6933504.261313272','3466752.130658053',
'1733376.0653290264','866688.0326645132','433344.0163322566',
'216672.008164711','108336.00408377283','54168.002041886415',
'27084.001020943208','13542.000510471604','6771.000253818478',
'3385.5001283265624','1692.7500655806048');
var mResolutions = new Array('156543.0339', '78271.51695', 
'39135.758475', '19567.8792375', '9783.93961875', '4891.969809375', 
'2445.984904687',
                            '1222.992452344', '611.496226172', 
'305.748113086', '152.874056543', '76.437028271', '38.218514136', 
'19.109257068',
                            '9.554628534', '4.777314267', '2.388657133', 
'1.194328567', '0.597164284');
var map = new 
_map({name:'Terra',title:'World',currentScale:2,units:3,resolution:72,version:'3',scales:aszScales, 
resolutions:mResolutions});
map.setDefaultExtents(-20037508.34, -200037508.34, 200037508.34, 
200037508.34);
map.setBackgroundColor('rgb(244,244,234)');
map.addLayer(new _layer( { 
name:'Terra',visible:true,opacity:100,imageformat:'png',queryable:false,tileSource:'auto',redrawInterval:-1,refreshInterval:-1,scales: 
new 
Array('1','1','1','1','1','1','1','1','1','1','1','1','1','1','1','1','1')}));
this.addMap( map );
this.tileWidth=256;
this.tileHeight=256;
this.server = 'http://xxx.xxx.xxx/';
this.tileURL = 'http://a.tile.osm.dmtech.ro/tiles/';
this.cacheURL = 'http://localcache.xxx.xxx/tiles/';
this.selectMap('Terra');


Replace setTile with the function below.

_layer.prototype.setTile = function(img) {
   var tforce = _settings.alwaysForceDraw;
   if (arguments.length == 2)
       tforce = true;
   var mercExtents = new Array('-20037508.34', '20037508.34');
   var zIdx = (this._map.currentScale + 2); // osm zooms are from 0 to 
18. azScales contains only calculated scales from 2 to 18 ...
   var res = this._map.resolutions[zIdx];
   var km = this._map.kaMap;
   var left = km.cellSize * (safeParseInt(img.style.left) + km.xOrigin);
   var top = -1 * km.cellSize * (safeParseInt(img.style.top) + km.yOrigin);
   var right = left + km.cellSize * km.tileWidth;
   var bottom = top - km.cellSize * km.tileHeight;
   if (left < mercExtents[0] || left > mercExtents[2] || top < 
mercExtents[0] || top > mercExtents[1]) return false;
   var limit = Math.pow(2, zIdx);
   var x = Math.round((left - mercExtents[0]) / (res * km.tileWidth));
   var y = Math.round((mercExtents[1] - top) / (res * km.tileHeight));
   if (y < 0 || y >= limit) return false;
   x = ((x % limit) + limit) % limit;
   if (tforce) {
      var src = this._map.kaMap.tileURL + zIdx + '/' + x + '/' + y + '.png';
   } else {
      var src = this._map.kaMap.cacheURL + zIdx + '/' + x + '/' + y + 
'.png';
   }
   if (img.src != src) {
       img.style.visibility = 'hidden';
       img.src = src;
   }
};



Have fun!
Ionut Muntean