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Replace ol.tilegrid.XYZ with an ol.tilegrid.createXYZ function

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This commit is contained in:
Andreas Hocevar
2015-04-28 23:26:35 +02:00
parent a116878a57
commit b05193fa45
16 changed files with 79 additions and 353 deletions
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src/ol/tilegrid/tilegrid.js
+29 -21
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@@ -534,36 +534,48 @@ ol.tilegrid.getForProjection = function(projection) {
*/
ol.tilegrid.createForExtent =
function(extent, opt_maxZoom, opt_tileSize, opt_corner) {
var tileSize = goog.isDef(opt_tileSize) ?
ol.size.toSize(opt_tileSize) : ol.size.toSize(ol.DEFAULT_TILE_SIZE);
var corner = goog.isDef(opt_corner) ?
opt_corner : ol.extent.Corner.BOTTOM_LEFT;
var resolutions = ol.tilegrid.resolutionsFromExtent(
extent, opt_maxZoom, ol.size.toSize(tileSize));
var widths = new Array(resolutions.length);
var extentWidth = ol.extent.getWidth(extent);
for (var z = resolutions.length - 1; z >= 0; --z) {
widths[z] = extentWidth / tileSize[0] / resolutions[z];
}
extent, opt_maxZoom, opt_tileSize);
return new ol.tilegrid.TileGrid({
extent: extent,
origin: ol.extent.getCorner(extent, corner),
resolutions: resolutions,
tileSize: goog.isDef(opt_tileSize) ? opt_tileSize : ol.DEFAULT_TILE_SIZE,
widths: widths
tileSize: opt_tileSize
});
};
/**
* Creates a tile grid with a standard XYZ tiling scheme.
* @param {olx.tilegrid.XYZOptions=} opt_options Tile grid options.
* @return {ol.tilegrid.TileGrid} Tile grid instance.
* @api
*/
ol.tilegrid.createXYZ = function(opt_options) {
var options = /** @type {olx.tilegrid.TileGridOptions} */ ({});
goog.object.extend(options, goog.isDef(opt_options) ?
opt_options : /** @type {olx.tilegrid.XYZOptions} */ ({}));
if (!goog.isDef(options.extent)) {
options.extent = ol.proj.get('EPSG:3857').getExtent();
}
options.resolutions = ol.tilegrid.resolutionsFromExtent(
options.extent, options.maxZoom, options.tileSize);
delete options.maxZoom;
return new ol.tilegrid.TileGrid(options);
};
/**
* Create a resolutions array from an extent. A zoom factor of 2 is assumed.
* @param {ol.Extent} extent Extent.
* @param {number=} opt_maxZoom Maximum zoom level (default is
* ol.DEFAULT_MAX_ZOOM).
* @param {ol.Size=} opt_tileSize Tile size (default uses ol.DEFAULT_TILE_SIZE).
* @param {number|ol.Size=} opt_tileSize Tile size (default uses
* ol.DEFAULT_TILE_SIZE).
* @return {!Array.<number>} Resolutions array.
*/
ol.tilegrid.resolutionsFromExtent =
@@ -574,8 +586,8 @@ ol.tilegrid.resolutionsFromExtent =
var height = ol.extent.getHeight(extent);
var width = ol.extent.getWidth(extent);
var tileSize = goog.isDef(opt_tileSize) ?
opt_tileSize : ol.size.toSize(ol.DEFAULT_TILE_SIZE);
var tileSize = ol.size.toSize(goog.isDef(opt_tileSize) ?
opt_tileSize : ol.DEFAULT_TILE_SIZE);
var maxResolution = Math.max(
width / tileSize[0], height / tileSize[1]);
@@ -643,12 +655,8 @@ ol.tilegrid.createOriginTopLeftTileCoordTransform = function(tileGrid) {
}
var z = tileCoord[0];
var fullTileRange = tileGrid.getFullTileRange(z);
var height;
if (goog.isNull(fullTileRange) || fullTileRange.minY < 0) {
height = 0;
} else {
height = fullTileRange.getHeight();
}
var height = (goog.isNull(fullTileRange) || fullTileRange.minY < 0) ?
0 : fullTileRange.getHeight();
return ol.tilecoord.createOrUpdate(
z, tileCoord[1], height - tileCoord[2] - 1, opt_tileCoord);
}