[OpenLayers-Users] Using kamaps direct cache access

[Jochen Grefe]

Hello,
I have changed the kamap Layer to work on precached http available
caches.
Usage:
new OpenLayers.Layer.KaMap('map','/kacachemap',
                            {g: 'test',map: 'testmap',i: 'png', cache:
true, metaTileSize: {w: 3, h: 3}},
                            {minScale: 100,maxScale: 500})

Everything like the normal kamap layer only cache: true to enable the
direct cache access.
And metaTileSize: {w: 3, h: 3} to give the number of tiles per metatile.
I'm not sure if the using of the params hashmap is appropriate.


Lib/layer/kamap.js:
84,88c84,113
<         return this.getFullRequestString(
<                       { t: pY, 
<                         l: pX,
<                         s: scale
<                       });
---
>         
>         if (this.params.cache){
>             var metaX = Math.floor(pX / this.tileSize.w /
this.params.metaTileSize.w) * this.tileSize.w *
this.params.metaTileSize.w;
>             var metaY = Math.floor(pY / this.tileSize.h /
this.params.metaTileSize.h) * this.tileSize.h *
this.params.metaTileSize.h;
>             var paramsString =     "/" + this.params["map"] 
>                                  + "/" + scale 
>                                  + "/" + this.params["g"] 
>                                  + "/" + "def"
>                                  + "/t" + metaY
>                                  + "/l" + metaX
>                                  + "/t" + pY + "l" + pX + "." +
this.params.i;
>            
>             // if url is not a string, it should be an array of
strings, 
>             // in which case we will deterministically select one of
them in 
>             // order to evenly distribute requests to different urls.
>             //
>             var url = this.url;
>             if (url instanceof Array) {
>                 url = this.selectUrl(paramsString, url);
>             }   
> 
>             return url + paramsString;
>         }
>         else {
>            return this.getFullRequestString(
>                           { t: pY, 
>                             l: pX,
>                             s: scale
>                           });
>         }