572 lines
19 KiB
JavaScript
572 lines
19 KiB
JavaScript
goog.provide('ol.test.TileGrid');
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describe('ol.tilegrid.TileGrid', function() {
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var extent;
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var resolutions;
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var origin;
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var origins;
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var tileSize;
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beforeEach(function() {
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resolutions = [1000, 500, 250, 100];
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extent = new ol.Extent(0, 0, 100000, 100000);
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origin = new ol.Coordinate(0, 0);
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origins = [];
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tileSize = new ol.Size(100, 100);
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});
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describe('create valid', function() {
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it('does not throw an exception', function() {
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expect(function() {
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return new ol.tilegrid.TileGrid({
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resolutions: resolutions,
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extent: extent,
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origin: origin,
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tileSize: tileSize
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});
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}).not.toThrow();
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});
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});
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describe('create with duplicate resolutions', function() {
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it('throws an exception', function() {
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expect(function() {
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return new ol.tilegrid.TileGrid({
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resolutions: [100, 50, 50, 25, 10],
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extent: extent,
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origin: origin,
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tileSize: tileSize
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});
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}).toThrow();
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});
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});
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describe('create with out of order resolutions', function() {
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it('throws an exception', function() {
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var resolutions = [100, 25, 50, 10];
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expect(function() {
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return new ol.tilegrid.TileGrid({
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resolutions: resolutions,
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extent: extent,
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origin: origin,
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tileSize: tileSize
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});
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}).toThrow();
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});
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});
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describe('create with multiple origins', function() {
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it('does not throw an exception', function() {
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expect(function() {
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return new ol.tilegrid.TileGrid({
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resolutions: [100, 50, 25, 10],
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extent: extent,
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origins: [origin, origin, origin, origin],
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tileSize: tileSize
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});
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}).not.toThrow();
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});
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});
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describe('create with too few origins', function() {
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it('throws an exception', function() {
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expect(function() {
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return new ol.tilegrid.TileGrid({
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resolutions: [100, 50, 25, 10],
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extent: extent,
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origins: [origin, origin, origin],
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tileSize: tileSize
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});
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}).toThrow();
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});
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});
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describe('create with too many origins', function() {
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it('throws an exception', function() {
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expect(function() {
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return new ol.tilegrid.TileGrid({
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resolutions: [100, 50, 25, 10],
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extent: extent,
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origins: [origin, origin, origin, origin, origin],
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tileSize: tileSize
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});
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}).toThrow();
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});
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});
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describe('createForProjection', function() {
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it('allows easier creation of a tile grid', function() {
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var projection = ol.Projection.getFromCode('EPSG:3857');
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var grid = ol.tilegrid.createForProjection(projection);
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expect(grid).toBeA(ol.tilegrid.TileGrid);
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var resolutions = grid.getResolutions();
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expect(resolutions.length).toBe(19);
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});
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it('accepts a number of zoom levels', function() {
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var projection = ol.Projection.getFromCode('EPSG:3857');
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var grid = ol.tilegrid.createForProjection(projection, 22);
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expect(grid).toBeA(ol.tilegrid.TileGrid);
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var resolutions = grid.getResolutions();
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expect(resolutions.length).toBe(23);
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});
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it('accepts a big number of zoom levels', function() {
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var projection = ol.Projection.getFromCode('EPSG:3857');
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var grid = ol.tilegrid.createForProjection(projection, 23);
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expect(grid).toBeA(ol.tilegrid.TileGrid);
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var resolutions = grid.getResolutions();
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expect(resolutions.length).toBe(24);
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});
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});
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describe('getTileCoordFromCoordAndZ', function() {
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describe('Y North, X East', function() {
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it('returns the expected TileCoord', function() {
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origin = new ol.Coordinate(0, 0);
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var tileGrid = new ol.tilegrid.TileGrid({
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resolutions: resolutions,
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extent: extent,
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origin: origin,
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tileSize: tileSize
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});
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var tileCoord;
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tileCoord = tileGrid.getTileCoordForCoordAndZ(
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new ol.Coordinate(0, 0), 3);
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expect(tileCoord.z).toEqual(3);
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expect(tileCoord.x).toEqual(0);
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expect(tileCoord.y).toEqual(0);
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tileCoord = tileGrid.getTileCoordForCoordAndZ(
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new ol.Coordinate(0, 100000), 3);
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expect(tileCoord.z).toEqual(3);
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expect(tileCoord.x).toEqual(0);
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expect(tileCoord.y).toEqual(10);
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tileCoord = tileGrid.getTileCoordForCoordAndZ(
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new ol.Coordinate(100000, 0), 3);
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expect(tileCoord.z).toEqual(3);
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expect(tileCoord.x).toEqual(10);
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expect(tileCoord.y).toEqual(0);
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tileCoord = tileGrid.getTileCoordForCoordAndZ(
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new ol.Coordinate(100000, 100000), 3);
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expect(tileCoord.z).toEqual(3);
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expect(tileCoord.x).toEqual(10);
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expect(tileCoord.y).toEqual(10);
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});
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});
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describe('Y South, X East', function() {
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it('returns the expected TileCoord', function() {
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origin = new ol.Coordinate(0, 100000);
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var tileGrid = new ol.tilegrid.TileGrid({
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resolutions: resolutions,
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extent: extent,
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origin: origin,
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tileSize: tileSize
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});
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var tileCoord;
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tileCoord = tileGrid.getTileCoordForCoordAndZ(
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new ol.Coordinate(0, 0), 3);
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expect(tileCoord.z).toEqual(3);
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expect(tileCoord.x).toEqual(0);
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expect(tileCoord.y).toEqual(-10);
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tileCoord = tileGrid.getTileCoordForCoordAndZ(
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new ol.Coordinate(0, 100000), 3);
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expect(tileCoord.z).toEqual(3);
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expect(tileCoord.x).toEqual(0);
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expect(tileCoord.y).toEqual(0);
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tileCoord = tileGrid.getTileCoordForCoordAndZ(
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new ol.Coordinate(100000, 0), 3);
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expect(tileCoord.z).toEqual(3);
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expect(tileCoord.x).toEqual(10);
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expect(tileCoord.y).toEqual(-10);
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tileCoord = tileGrid.getTileCoordForCoordAndZ(
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new ol.Coordinate(100000, 100000), 3);
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expect(tileCoord.z).toEqual(3);
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expect(tileCoord.x).toEqual(10);
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expect(tileCoord.y).toEqual(0);
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});
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});
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});
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describe('getTileCoordForCoordAndResolution', function() {
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it('returns the expected TileCoord', function() {
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var tileSize = new ol.Size(256, 256);
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var tileGrid = new ol.tilegrid.TileGrid({
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resolutions: [10],
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extent: extent,
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origin: origin,
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tileSize: tileSize
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});
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var coordinate;
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var tileCoord;
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// gets the first tile at the origin
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coordinate = new ol.Coordinate(0, 0);
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tileCoord = tileGrid.getTileCoordForCoordAndResolution(
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coordinate, 10);
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expect(tileCoord.z).toEqual(0);
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expect(tileCoord.x).toEqual(0);
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expect(tileCoord.y).toEqual(0);
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// gets one tile northwest of the origin
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coordinate = new ol.Coordinate(-1280, 1280);
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tileCoord = tileGrid.getTileCoordForCoordAndResolution(
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coordinate, 10);
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expect(tileCoord.z).toEqual(0);
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expect(tileCoord.x).toEqual(-1);
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expect(tileCoord.y).toEqual(0);
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// gets one tile northeast of the origin
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coordinate = new ol.Coordinate(1280, 1280);
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tileCoord = tileGrid.getTileCoordForCoordAndResolution(
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coordinate, 10);
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expect(tileCoord.z).toEqual(0);
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expect(tileCoord.x).toEqual(0);
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expect(tileCoord.y).toEqual(0);
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// gets one tile southeast of the origin
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coordinate = new ol.Coordinate(1280, -1280);
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tileCoord = tileGrid.getTileCoordForCoordAndResolution(
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coordinate, 10);
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expect(tileCoord.z).toEqual(0);
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expect(tileCoord.x).toEqual(0);
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expect(tileCoord.y).toEqual(-1);
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// gets one tile southwest of the origin
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coordinate = new ol.Coordinate(-1280, -1280);
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tileCoord = tileGrid.getTileCoordForCoordAndResolution(
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coordinate, 10);
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expect(tileCoord.z).toEqual(0);
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expect(tileCoord.x).toEqual(-1);
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expect(tileCoord.y).toEqual(-1);
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// gets the tile to the east when on the edge
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coordinate = new ol.Coordinate(2560, -1280);
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tileCoord = tileGrid.getTileCoordForCoordAndResolution(
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coordinate, 10);
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expect(tileCoord.z).toEqual(0);
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expect(tileCoord.x).toEqual(1);
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expect(tileCoord.y).toEqual(-1);
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// gets the tile to the north when on the edge
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coordinate = new ol.Coordinate(1280, -2560);
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tileCoord = tileGrid.getTileCoordForCoordAndResolution(
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coordinate, 10);
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expect(tileCoord.z).toEqual(0);
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expect(tileCoord.x).toEqual(0);
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expect(tileCoord.y).toEqual(-1);
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// pixels are top aligned to the origin
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coordinate = new ol.Coordinate(1280, -2559.999);
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tileCoord = tileGrid.getTileCoordForCoordAndResolution(
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coordinate, 10);
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expect(tileCoord.z).toEqual(0);
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expect(tileCoord.x).toEqual(0);
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expect(tileCoord.y).toEqual(-1);
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// pixels are left aligned to the origin
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coordinate = new ol.Coordinate(2559.999, -1280);
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tileCoord = tileGrid.getTileCoordForCoordAndResolution(
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coordinate, 10);
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expect(tileCoord.z).toEqual(0);
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expect(tileCoord.x).toEqual(0);
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expect(tileCoord.y).toEqual(-1);
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});
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});
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describe('getTileCoordForCoordAndResolution fractional', function() {
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it('returns the expected TileCoord', function() {
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var tileSize = new ol.Size(256, 256);
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var tileGrid = new ol.tilegrid.TileGrid({
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resolutions: [1 / 3],
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extent: extent,
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origin: origin,
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tileSize: tileSize
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});
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var coordinate;
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var tileCoord;
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// These tests render at a resolution of 1. Because the layer's
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// closest resolution is 1/3, the images are scaled by 1/3.
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// In this scenario, every third tile will be one pixel wider when
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// rendered (0,0 is normal; 1,0 is wider; 0,1 is taller; etc.)
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// gets the first tile at the origin
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coordinate = new ol.Coordinate(0, 0);
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tileCoord = tileGrid.getTileCoordForCoordAndResolution(
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coordinate, 1);
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expect(tileCoord.z).toEqual(0);
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expect(tileCoord.x).toEqual(0);
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expect(tileCoord.y).toEqual(0);
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// gets the 1,0 tile at 256/3,0
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coordinate = new ol.Coordinate(256 / 3, 0);
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tileCoord = tileGrid.getTileCoordForCoordAndResolution(
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coordinate, 1);
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expect(tileCoord.z).toEqual(0);
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expect(tileCoord.x).toEqual(1);
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expect(tileCoord.y).toEqual(0);
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// still gets the 1,0 tile at 512/3,0 - wider tile
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coordinate = new ol.Coordinate(512 / 3, 0);
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tileCoord = tileGrid.getTileCoordForCoordAndResolution(
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coordinate, 1);
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expect(tileCoord.z).toEqual(0);
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expect(tileCoord.x).toEqual(1);
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expect(tileCoord.y).toEqual(0);
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// gets the 2,0 tile at 513/3,0
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coordinate = new ol.Coordinate(513 / 3, 0);
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tileCoord = tileGrid.getTileCoordForCoordAndResolution(
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coordinate, 1);
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expect(tileCoord.z).toEqual(0);
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expect(tileCoord.x).toEqual(2);
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expect(tileCoord.y).toEqual(0);
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// gets the 3,0 tile at 768/3,0
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coordinate = new ol.Coordinate(768 / 3, 0);
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tileCoord = tileGrid.getTileCoordForCoordAndResolution(
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coordinate, 1);
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expect(tileCoord.z).toEqual(0);
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expect(tileCoord.x).toEqual(3);
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expect(tileCoord.y).toEqual(0);
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// gets the 4,0 tile at 1024/3,0
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coordinate = new ol.Coordinate(1024 / 3, 0);
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tileCoord = tileGrid.getTileCoordForCoordAndResolution(
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coordinate, 1);
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expect(tileCoord.z).toEqual(0);
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expect(tileCoord.x).toEqual(4);
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expect(tileCoord.y).toEqual(0);
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// still gets the 4,0 tile at 1280/3,0 - wider tile
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coordinate = new ol.Coordinate(1280 / 3, 0);
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tileCoord = tileGrid.getTileCoordForCoordAndResolution(
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coordinate, 1);
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expect(tileCoord.z).toEqual(0);
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expect(tileCoord.x).toEqual(4);
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expect(tileCoord.y).toEqual(0);
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// gets the 5,0 tile at 1281/3,0
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coordinate = new ol.Coordinate(1281 / 3, 0);
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tileCoord = tileGrid.getTileCoordForCoordAndResolution(
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coordinate, 1);
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expect(tileCoord.z).toEqual(0);
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expect(tileCoord.x).toEqual(5);
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expect(tileCoord.y).toEqual(0);
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// gets the 0,1 tile at 0,-256/3
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coordinate = new ol.Coordinate(0, -256 / 3);
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tileCoord = tileGrid.getTileCoordForCoordAndResolution(
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coordinate, 1);
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expect(tileCoord.z).toEqual(0);
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expect(tileCoord.x).toEqual(0);
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expect(tileCoord.y).toEqual(-2);
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// still gets the 0,1 tile at 0,-512/3 - taller tile
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coordinate = new ol.Coordinate(0, -512 / 3);
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tileCoord = tileGrid.getTileCoordForCoordAndResolution(
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coordinate, 1);
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expect(tileCoord.z).toEqual(0);
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expect(tileCoord.x).toEqual(0);
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expect(tileCoord.y).toEqual(-2);
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});
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});
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describe('getTileCoordCenter', function() {
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it('returns the expected center', function() {
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var tileGrid = new ol.tilegrid.TileGrid({
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resolutions: resolutions,
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extent: extent,
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origin: origin,
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tileSize: tileSize
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});
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var center;
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center = tileGrid.getTileCoordCenter(new ol.TileCoord(0, 0, 0));
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expect(center.x).toEqual(50000);
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expect(center.y).toEqual(50000);
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center = tileGrid.getTileCoordCenter(new ol.TileCoord(3, 0, 0));
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expect(center.x).toEqual(5000);
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expect(center.y).toEqual(5000);
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center = tileGrid.getTileCoordCenter(new ol.TileCoord(3, 9, 9));
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expect(center.x).toEqual(95000);
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expect(center.y).toEqual(95000);
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});
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});
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describe('getTileCoordExent', function() {
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it('returns the expected extend', function() {
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var tileGrid = new ol.tilegrid.TileGrid({
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resolutions: resolutions,
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extent: extent,
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origin: origin,
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tileSize: tileSize
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});
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var tileCoordExtent;
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tileCoordExtent = tileGrid.getTileCoordExtent(new ol.TileCoord(0, 0, 0));
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expect(tileCoordExtent.minX).toEqual(0);
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expect(tileCoordExtent.minY).toEqual(0);
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expect(tileCoordExtent.maxX).toEqual(100000);
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expect(tileCoordExtent.maxY).toEqual(100000);
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tileCoordExtent = tileGrid.getTileCoordExtent(new ol.TileCoord(3, 9, 0));
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expect(tileCoordExtent.minX).toEqual(90000);
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expect(tileCoordExtent.minY).toEqual(0);
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expect(tileCoordExtent.maxX).toEqual(100000);
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expect(tileCoordExtent.maxY).toEqual(10000);
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tileCoordExtent = tileGrid.getTileCoordExtent(new ol.TileCoord(3, 0, 9));
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expect(tileCoordExtent.minX).toEqual(0);
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expect(tileCoordExtent.minY).toEqual(90000);
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expect(tileCoordExtent.maxX).toEqual(10000);
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expect(tileCoordExtent.maxY).toEqual(100000);
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});
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});
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describe('getTileRangeForExtentAndZ', function() {
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it('returns the expected TileRange', function() {
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var tileGrid = new ol.tilegrid.TileGrid({
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resolutions: resolutions,
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extent: extent,
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origin: origin,
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tileSize: tileSize
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});
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var e = new ol.Extent(45000, 5000, 55000, 15000);
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var tileRange;
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tileRange = tileGrid.getTileRangeForExtentAndZ(e, 0);
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expect(tileRange.minY).toEqual(0);
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expect(tileRange.minX).toEqual(0);
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expect(tileRange.maxX).toEqual(0);
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expect(tileRange.maxY).toEqual(0);
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tileRange = tileGrid.getTileRangeForExtentAndZ(e, 1);
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expect(tileRange.minX).toEqual(0);
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expect(tileRange.minY).toEqual(0);
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expect(tileRange.maxX).toEqual(1);
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expect(tileRange.maxY).toEqual(0);
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tileRange = tileGrid.getTileRangeForExtentAndZ(e, 2);
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expect(tileRange.minX).toEqual(1);
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expect(tileRange.minY).toEqual(0);
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expect(tileRange.maxX).toEqual(2);
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expect(tileRange.maxY).toEqual(0);
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tileRange = tileGrid.getTileRangeForExtentAndZ(e, 3);
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expect(tileRange.minX).toEqual(4);
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expect(tileRange.minY).toEqual(0);
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expect(tileRange.maxX).toEqual(5);
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expect(tileRange.maxY).toEqual(1);
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});
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});
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describe('forEachTileCoordParentTileRange', function() {
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it('iterates as expected', function() {
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var tileGrid = new ol.tilegrid.TileGrid({
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resolutions: resolutions,
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extent: extent,
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origin: origin,
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tileSize: tileSize
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});
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var zs = [], tileRanges = [];
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tileGrid.forEachTileCoordParentTileRange(
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new ol.TileCoord(3, 7, 3),
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function(z, tileRange) {
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zs.push(z);
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tileRanges.push(tileRange);
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return false;
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});
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expect(zs.length).toEqual(3);
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expect(tileRanges.length).toEqual(3);
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expect(zs[0]).toEqual(2);
|
|
expect(tileRanges[0].minX).toEqual(2);
|
|
expect(tileRanges[0].minY).toEqual(1);
|
|
expect(tileRanges[0].maxX).toEqual(3);
|
|
expect(tileRanges[0].maxY).toEqual(1);
|
|
|
|
expect(zs[1]).toEqual(1);
|
|
expect(tileRanges[1].minX).toEqual(1);
|
|
expect(tileRanges[1].minY).toEqual(0);
|
|
expect(tileRanges[1].maxX).toEqual(1);
|
|
expect(tileRanges[1].maxY).toEqual(0);
|
|
|
|
expect(zs[2]).toEqual(0);
|
|
expect(tileRanges[2].minX).toEqual(0);
|
|
expect(tileRanges[2].minY).toEqual(0);
|
|
expect(tileRanges[2].maxX).toEqual(0);
|
|
expect(tileRanges[2].maxY).toEqual(0);
|
|
});
|
|
});
|
|
|
|
describe('getZForResolution (exact)', function() {
|
|
it('returns the expected z value', function() {
|
|
var tileGrid = new ol.tilegrid.TileGrid({
|
|
resolutions: resolutions,
|
|
extent: extent,
|
|
origin: origin,
|
|
tileSize: tileSize
|
|
});
|
|
|
|
expect(tileGrid.getZForResolution(1000)).toEqual(0);
|
|
expect(tileGrid.getZForResolution(500)).toEqual(1);
|
|
expect(tileGrid.getZForResolution(250)).toEqual(2);
|
|
expect(tileGrid.getZForResolution(100)).toEqual(3);
|
|
});
|
|
});
|
|
|
|
describe('getZForResolution (approcimate)', function() {
|
|
it('returns the expected z value', function() {
|
|
var tileGrid = new ol.tilegrid.TileGrid({
|
|
resolutions: resolutions,
|
|
extent: extent,
|
|
origin: origin,
|
|
tileSize: tileSize
|
|
});
|
|
|
|
expect(tileGrid.getZForResolution(2000)).toEqual(0);
|
|
expect(tileGrid.getZForResolution(1000)).toEqual(0);
|
|
expect(tileGrid.getZForResolution(900)).toEqual(0);
|
|
expect(tileGrid.getZForResolution(750)).toEqual(1);
|
|
expect(tileGrid.getZForResolution(625)).toEqual(1);
|
|
expect(tileGrid.getZForResolution(500)).toEqual(1);
|
|
expect(tileGrid.getZForResolution(475)).toEqual(1);
|
|
expect(tileGrid.getZForResolution(375)).toEqual(2);
|
|
expect(tileGrid.getZForResolution(250)).toEqual(2);
|
|
expect(tileGrid.getZForResolution(200)).toEqual(2);
|
|
expect(tileGrid.getZForResolution(125)).toEqual(3);
|
|
expect(tileGrid.getZForResolution(100)).toEqual(3);
|
|
expect(tileGrid.getZForResolution(50)).toEqual(3);
|
|
});
|
|
});
|
|
|
|
});
|
|
|
|
goog.require('ol.Coordinate');
|
|
goog.require('ol.Extent');
|
|
goog.require('ol.Size');
|
|
goog.require('ol.TileCoord');
|
|
goog.require('ol.tilegrid.TileGrid');
|