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Use top-left corner of extent for all generated tile grids

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This commit is contained in:
Andreas Hocevar
2015-06-18 09:47:53 +02:00
parent e3a8dc89de
commit a753d282cc
7 changed files with 99 additions and 66 deletions
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test/spec/ol/tilecoord.test.js
+22 -7
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@@ -47,21 +47,21 @@ describe('ol.TileCoord', function() {
resolutions: [2, 1],
minZoom: 1
});
expect(ol.tilecoord.withinExtentAndZ([0, 0, 0], tileGrid)).to.be(false);
expect(ol.tilecoord.withinExtentAndZ([1, 0, 0], tileGrid)).to.be(true);
expect(ol.tilecoord.withinExtentAndZ([2, 0, 0], tileGrid)).to.be(false);
expect(ol.tilecoord.withinExtentAndZ([0, 0, -1], tileGrid)).to.be(false);
expect(ol.tilecoord.withinExtentAndZ([1, 0, -1], tileGrid)).to.be(true);
expect(ol.tilecoord.withinExtentAndZ([2, 0, -1], tileGrid)).to.be(false);
});
it('restricts by extent when extent defines tile ranges', function() {
var tileGrid = new ol.tilegrid.TileGrid({
extent: [10, 20, 30, 40],
sizes: [[3, 3]],
sizes: [[3, -3]],
tileSize: 10,
resolutions: [1]
});
expect(ol.tilecoord.withinExtentAndZ([0, 1, 1], tileGrid)).to.be(true);
expect(ol.tilecoord.withinExtentAndZ([0, 2, 0], tileGrid)).to.be(false);
expect(ol.tilecoord.withinExtentAndZ([0, 0, 2], tileGrid)).to.be(false);
expect(ol.tilecoord.withinExtentAndZ([0, 1, -2], tileGrid)).to.be(true);
expect(ol.tilecoord.withinExtentAndZ([0, 2, -1], tileGrid)).to.be(false);
expect(ol.tilecoord.withinExtentAndZ([0, 0, -3], tileGrid)).to.be(false);
});
it('restricts by extent when sizes define tile ranges', function() {
@@ -79,6 +79,21 @@ describe('ol.TileCoord', function() {
expect(ol.tilecoord.withinExtentAndZ([0, 0, 3], tileGrid)).to.be(false);
});
it('restricts by extent when sizes (neg y) define tile ranges', function() {
var tileGrid = new ol.tilegrid.TileGrid({
origin: [10, 40],
sizes: [[3, -3]],
tileSize: 10,
resolutions: [1]
});
expect(ol.tilecoord.withinExtentAndZ([0, 0, -1], tileGrid)).to.be(true);
expect(ol.tilecoord.withinExtentAndZ([0, -1, -1], tileGrid)).to.be(false);
expect(ol.tilecoord.withinExtentAndZ([0, 0, 0], tileGrid)).to.be(false);
expect(ol.tilecoord.withinExtentAndZ([0, 2, -3], tileGrid)).to.be(true);
expect(ol.tilecoord.withinExtentAndZ([0, 3, -1], tileGrid)).to.be(false);
expect(ol.tilecoord.withinExtentAndZ([0, 0, -4], tileGrid)).to.be(false);
});
it('does not restrict by extent with no extent or sizes', function() {
var tileGrid = new ol.tilegrid.TileGrid({
origin: [10, 20],