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Add function to iterate over tile coordinates in extent and z

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This commit is contained in:
Andreas Hocevar
2016-06-22 18:01:29 +02:00
parent 29c8af7559
commit 14cecb7163
2 changed files with 34 additions and 0 deletions
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18
src/ol/tilegrid/tilegrid.js
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@@ -150,6 +150,24 @@ ol.tilegrid.TileGrid = function(options) {
ol.tilegrid.TileGrid.tmpTileCoord_ = [0, 0, 0];
/**
* Call a function with each tile coordinate for a given extent and zoom level.
*
* @param {ol.Extent} extent Extent.
* @param {number} zoom Zoom level.
* @param {function(ol.TileCoord)} callback Function called with each tile coordinate.
* @api
*/
ol.tilegrid.TileGrid.prototype.forEachTileCoordInExtentAndZ = function(extent, zoom, callback) {
var tileRange = this.getTileRangeForExtentAndZ(extent, zoom);
for (var i = tileRange.minX, ii = tileRange.maxX; i <= ii; ++i) {
for (var j = tileRange.minY, jj = tileRange.maxY; j <= jj; ++j) {
callback([zoom, i, j]);
}
}
};
/**
* @param {ol.TileCoord} tileCoord Tile coordinate.
* @param {function(this: T, number, ol.TileRange): boolean} callback Callback.

16
test/spec/ol/tilegrid/tilegrid.test.js
View File

@@ -949,6 +949,22 @@ describe('ol.tilegrid.TileGrid', function() {
});
describe('forEachTileCoordInExtentAndZ', function() {
it('calls the provided function with each tile coordinate', function() {
var tileGrid = ol.tilegrid.createXYZ({extent: [-180, -90, 180, 90]});
var tileCoords = [];
tileGrid.forEachTileCoordInExtentAndZ([15, 47, 16, 48], 8, function(tileCoord) {
tileCoords.push(tileCoord);
});
expect(tileCoords).to.eql([
[8, 138, -31],
[8, 138, -30],
[8, 139, -31],
[8, 139, -30]
]);
});
});
describe('forEachTileCoordParentTileRange', function() {
it('iterates as expected', function() {
var tileGrid = new ol.tilegrid.TileGrid({