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Use for loop instead of forEach in WebGL tile layer renderer

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Tom Payne
2013-04-19 20:41:54 +02:00
parent f5611d6cd6
commit d964bbc605
1 changed files with 12 additions and 11 deletions
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23
src/ol/renderer/webgl/webgltilelayerrenderer.js
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@@ -236,23 +236,24 @@ ol.renderer.webgl.TileLayer.prototype.renderFrame =
var zs = goog.array.map(goog.object.getKeys(tilesToDrawByZ), Number);
goog.array.sort(zs);
var u_tileOffset = goog.vec.Vec4.createFloat32();
goog.array.forEach(zs, function(z) {
goog.object.forEach(tilesToDrawByZ[z], function(tile) {
var tileExtent = tileGrid.getTileCoordExtent(tile.tileCoord, tmpExtent);
var sx =
2 * (tileExtent[1] - tileExtent[0]) / framebufferExtentSize.width;
var sy =
2 * (tileExtent[3] - tileExtent[2]) / framebufferExtentSize.height;
var tx = 2 * (tileExtent[0] - framebufferExtent[0]) /
var i, sx, sy, tileExtent, tileKey, tilesToDraw, tx, ty;
for (i = 0; i < zs.length; ++i) {
tilesToDraw = tilesToDrawByZ[zs[i]];
for (tileKey in tilesToDraw) {
tile = tilesToDraw[tileKey];
tileExtent = tileGrid.getTileCoordExtent(tile.tileCoord, tmpExtent);
sx = 2 * (tileExtent[1] - tileExtent[0]) / framebufferExtentSize.width;
sy = 2 * (tileExtent[3] - tileExtent[2]) / framebufferExtentSize.height;
tx = 2 * (tileExtent[0] - framebufferExtent[0]) /
framebufferExtentSize.width - 1;
var ty = 2 * (tileExtent[2] - framebufferExtent[2]) /
ty = 2 * (tileExtent[2] - framebufferExtent[2]) /
framebufferExtentSize.height - 1;
goog.vec.Vec4.setFromValues(u_tileOffset, sx, sy, tx, ty);
gl.uniform4fv(this.locations_.u_tileOffset, u_tileOffset);
mapRenderer.bindTileTexture(tile, goog.webgl.LINEAR, goog.webgl.LINEAR);
gl.drawArrays(goog.webgl.TRIANGLE_STRIP, 0, 4);
}, this);
}, this);
}
}
if (allTilesLoaded) {
this.renderedTileRange_ = tileRange;