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Merge pull request #12024 from tschaub/tile-grid-util

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Add a tile grid method for getting a tile range given a tile coord and zoom level
This commit is contained in:
Tim Schaub
2021-02-21 18:25:14 -07:00
committed by GitHub
parent 65df12068b 423d1bdcdb
commit cdd28b8064
2 changed files with 105 additions and 1 deletions
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53
test/spec/ol/tilegrid/tilegrid.test.js
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@@ -1179,4 +1179,57 @@ describe('ol.tilegrid.TileGrid', function () {
expect(tileGrid.getZForResolution(50, -1)).to.eql(3);
});
});
describe('getTileRangeForTileCoordAndZ()', function () {
const tileGrid = createForExtent(
getProjection('EPSG:3857').getExtent(),
22
);
it('can be used to get the child tile range', function () {
const range = tileGrid.getTileRangeForTileCoordAndZ([0, 0, 0], 1);
expect(range.minX).to.be(0);
expect(range.maxX).to.be(1);
expect(range.minY).to.be(0);
expect(range.maxY).to.be(1);
});
it('can be used to get the range of a deeper level', function () {
const range = tileGrid.getTileRangeForTileCoordAndZ([0, 0, 0], 3);
expect(range.minX).to.be(0);
expect(range.maxX).to.be(7);
expect(range.minY).to.be(0);
expect(range.maxY).to.be(7);
});
it('can be used to get the parent tile range', function () {
const range = tileGrid.getTileRangeForTileCoordAndZ([1, 1, 0], 0);
expect(range.minX).to.be(0);
expect(range.maxX).to.be(0);
expect(range.minY).to.be(0);
expect(range.maxY).to.be(0);
});
it('can be used to get the range of a shallower level', function () {
const range = tileGrid.getTileRangeForTileCoordAndZ([3, 1, 6], 0);
expect(range.minX).to.be(0);
expect(range.maxX).to.be(0);
expect(range.minY).to.be(0);
expect(range.maxY).to.be(0);
});
const tileCoord = [15, 6239, 11751];
tileGrid.forEachTileCoordParentTileRange(tileCoord, function (
z,
tileRange
) {
it(`works for level ${z}`, function () {
const range = tileGrid.getTileRangeForTileCoordAndZ(tileCoord, z);
expect(range.minX).to.be(tileRange.minX);
expect(range.maxX).to.be(tileRange.maxX);
expect(range.minY).to.be(tileRange.minY);
expect(range.maxY).to.be(tileRange.maxY);
});
});
});
});