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KaMap layer now sublasses initTiles, to implement the kamap 0-based tiling scheme instead of the OpenLayers/WW -180,-90 method. This means that there are no longer any restrictions on using ka-Map with other layers! woohoo! You can use ka-map on top of WorldWind, or with another ka-map layer, even if it has differently sized tiles. yay!

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git-svn-id: http://svn.openlayers.org/trunk/openlayers@764 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
This commit is contained in:
crschmidt
2006-06-26 13:54:14 +00:00
parent 1912d4355c
commit a3e5944e4e
3 changed files with 71 additions and 3 deletions
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63
lib/OpenLayers/Layer/KaMap.js
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@@ -55,6 +55,69 @@ OpenLayers.Layer.KaMap.prototype =
return new OpenLayers.Tile.Image(this, position, bounds,
url, this.tileSize);
},
_initTiles:function() {
//first of all, clear out the main div
this.div.innerHTML = "";
//now clear out the old grid and start a new one
this.clearGrid();
this.grid = new Array();
var viewSize = this.map.getSize();
var bounds = this.map.getExtent();
var extent = this.map.getFullExtent();
var resolution = this.map.getResolution();
var tilelon = resolution*this.tileSize.w;
var tilelat = resolution*this.tileSize.h;
var offsetlon = bounds.left;
var tilecol = Math.floor(offsetlon/tilelon);
var tilecolremain = offsetlon/tilelon - tilecol;
var tileoffsetx = -tilecolremain * this.tileSize.w;
var tileoffsetlon = tilecol * tilelon;
var offsetlat = bounds.top;
var tilerow = Math.ceil(offsetlat/tilelat);
var tilerowremain = tilerow - offsetlat/tilelat;
var tileoffsety = -(tilerowremain+1) * this.tileSize.h;
var tileoffsetlat = tilerow * tilelat;
tileoffsetx = Math.round(tileoffsetx); // heaven help us
tileoffsety = Math.round(tileoffsety);
this.origin = new OpenLayers.Pixel(tileoffsetx,tileoffsety);
var startX = tileoffsetx;
var startLon = tileoffsetlon;
do {
var row = new Array();
this.grid.append(row);
tileoffsetlon = startLon;
tileoffsetx = startX;
do {
var tileBounds = new OpenLayers.Bounds(tileoffsetlon,
tileoffsetlat,
tileoffsetlon+tilelon,
tileoffsetlat+tilelat);
var tile = this.addTile(tileBounds,
new OpenLayers.Pixel(tileoffsetx - parseInt(this.map.layerContainerDiv.style.left),
tileoffsety - parseInt(this.map.layerContainerDiv.style.top))
);
tile.draw((this.params.TRANSPARENT == 'true'));
row.append(tile);
tileoffsetlon += tilelon;
tileoffsetx += this.tileSize.w;
} while (tileoffsetlon < bounds.right)
tileoffsetlat -= tilelat;
tileoffsety += this.tileSize.h;
} while(tileoffsetlat > bounds.bottom - tilelat)
},
/** @final @type String */
CLASS_NAME: "OpenLayers.Layer.KaMap"
});