181 lines
9.2 KiB
JavaScript
181 lines
9.2 KiB
JavaScript
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defineSuite([
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'Core/GeographicTilingScheme',
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'Core/Cartesian2',
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'Core/Cartographic',
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'Core/GeographicProjection',
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'Core/Math',
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'Core/Rectangle',
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'Core/TilingScheme'
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], function(
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GeographicTilingScheme,
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Cartesian2,
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Cartographic,
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GeographicProjection,
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CesiumMath,
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Rectangle,
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TilingScheme) {
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'use strict';
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it('conforms to TilingScheme interface.', function() {
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expect(GeographicTilingScheme).toConformToInterface(TilingScheme);
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});
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describe('Conversions from tile indices to cartographic rectangles.', function() {
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it('tileXYToRectangle returns full rectangle for single root tile.', function() {
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var tilingScheme = new GeographicTilingScheme({
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numberOfLevelZeroTilesX : 1,
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numberOfLevelZeroTilesY : 1
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});
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var tilingSchemeRectangle = tilingScheme.rectangle;
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var rectangle = tilingScheme.tileXYToRectangle(0, 0, 0);
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expect(rectangle.west).toEqualEpsilon(tilingSchemeRectangle.west, CesiumMath.EPSILON10);
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expect(rectangle.south).toEqualEpsilon(tilingSchemeRectangle.south, CesiumMath.EPSILON10);
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expect(rectangle.east).toEqualEpsilon(tilingSchemeRectangle.east, CesiumMath.EPSILON10);
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expect(rectangle.north).toEqualEpsilon(tilingSchemeRectangle.north, CesiumMath.EPSILON10);
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});
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it('tileXYToRectangle uses result parameter if provided', function() {
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var tilingScheme = new GeographicTilingScheme({
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numberOfLevelZeroTilesX : 1,
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numberOfLevelZeroTilesY : 1
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});
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var tilingSchemeRectangle = tilingScheme.rectangle;
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var result = new Rectangle(0.0, 0.0, 0.0);
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var rectangle = tilingScheme.tileXYToRectangle(0, 0, 0, result);
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expect(result).toEqual(rectangle);
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expect(rectangle.west).toEqualEpsilon(tilingSchemeRectangle.west, CesiumMath.EPSILON10);
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expect(rectangle.south).toEqualEpsilon(tilingSchemeRectangle.south, CesiumMath.EPSILON10);
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expect(rectangle.east).toEqualEpsilon(tilingSchemeRectangle.east, CesiumMath.EPSILON10);
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expect(rectangle.north).toEqualEpsilon(tilingSchemeRectangle.north, CesiumMath.EPSILON10);
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});
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it('tiles are numbered from the northwest corner.', function() {
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var tilingScheme = new GeographicTilingScheme({
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numberOfLevelZeroTilesX: 2,
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numberOfLevelZeroTilesY: 2
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});
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var northwest = tilingScheme.tileXYToRectangle(0, 0, 1);
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var northeast = tilingScheme.tileXYToRectangle(1, 0, 1);
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var southeast = tilingScheme.tileXYToRectangle(1, 1, 1);
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var southwest = tilingScheme.tileXYToRectangle(0, 1, 1);
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expect(northeast.north).toEqual(northwest.north);
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expect(northeast.south).toEqual(northwest.south);
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expect(southeast.north).toEqual(southwest.north);
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expect(southeast.south).toEqual(southwest.south);
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expect(northwest.west).toEqual(southwest.west);
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expect(northwest.east).toEqual(southwest.east);
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expect(northeast.west).toEqual(southeast.west);
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expect(northeast.east).toEqual(southeast.east);
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expect(northeast.north).toBeGreaterThan(southeast.north);
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expect(northeast.south).toBeGreaterThan(southeast.south);
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expect(northwest.north).toBeGreaterThan(southwest.north);
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expect(northwest.south).toBeGreaterThan(southwest.south);
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expect(northeast.east).toBeGreaterThan(northwest.east);
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expect(northeast.west).toBeGreaterThan(northwest.west);
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expect(southeast.east).toBeGreaterThan(southwest.east);
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expect(southeast.west).toBeGreaterThan(southwest.west);
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});
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it('adjacent tiles have overlapping coordinates', function() {
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var tilingScheme = new GeographicTilingScheme({
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numberOfLevelZeroTilesX: 2,
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numberOfLevelZeroTilesY: 2
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});
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var northwest = tilingScheme.tileXYToRectangle(0, 0, 1);
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var northeast = tilingScheme.tileXYToRectangle(1, 0, 1);
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var southeast = tilingScheme.tileXYToRectangle(1, 1, 1);
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var southwest = tilingScheme.tileXYToRectangle(0, 1, 1);
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expect(northeast.south).toEqualEpsilon(southeast.north, CesiumMath.EPSILON15);
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expect(northwest.south).toEqualEpsilon(southwest.north, CesiumMath.EPSILON15);
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expect(northeast.west).toEqualEpsilon(northwest.east, CesiumMath.EPSILON15);
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expect(southeast.west).toEqualEpsilon(southwest.east, CesiumMath.EPSILON15);
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});
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});
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it('uses a GeographicProjection', function() {
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var tilingScheme = new GeographicTilingScheme();
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expect(tilingScheme.projection).toBeInstanceOf(GeographicProjection);
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});
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describe('rectangleToNativeRectangle', function() {
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it('converts radians to degrees', function() {
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var tilingScheme = new GeographicTilingScheme();
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var rectangleInRadians = new Rectangle(0.1, 0.2, 0.3, 0.4);
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var nativeRectangle = tilingScheme.rectangleToNativeRectangle(rectangleInRadians);
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expect(nativeRectangle.west).toEqualEpsilon(rectangleInRadians.west * 180 / Math.PI, CesiumMath.EPSILON13);
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expect(nativeRectangle.south).toEqualEpsilon(rectangleInRadians.south * 180 / Math.PI, CesiumMath.EPSILON13);
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expect(nativeRectangle.east).toEqualEpsilon(rectangleInRadians.east * 180 / Math.PI, CesiumMath.EPSILON13);
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expect(nativeRectangle.north).toEqualEpsilon(rectangleInRadians.north * 180 / Math.PI, CesiumMath.EPSILON13);
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});
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it('uses result parameter if provided', function() {
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var tilingScheme = new GeographicTilingScheme();
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var rectangleInRadians = new Rectangle(0.1, 0.2, 0.3, 0.4);
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var resultRectangle = new Rectangle(0.0, 0.0, 0.0, 0.0);
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var outputRectangle = tilingScheme.rectangleToNativeRectangle(rectangleInRadians, resultRectangle);
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expect(outputRectangle).toEqual(resultRectangle);
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expect(resultRectangle.west).toEqualEpsilon(rectangleInRadians.west * 180 / Math.PI, CesiumMath.EPSILON13);
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expect(resultRectangle.south).toEqualEpsilon(rectangleInRadians.south * 180 / Math.PI, CesiumMath.EPSILON13);
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expect(resultRectangle.east).toEqualEpsilon(rectangleInRadians.east * 180 / Math.PI, CesiumMath.EPSILON13);
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expect(resultRectangle.north).toEqualEpsilon(rectangleInRadians.north * 180 / Math.PI, CesiumMath.EPSILON13);
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});
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});
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describe('positionToTileXY', function() {
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it('returns undefined when outside rectangle', function() {
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var tilingScheme = new GeographicTilingScheme({
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rectangle : new Rectangle(0.1, 0.2, 0.3, 0.4)
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});
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var tooFarWest = new Cartographic(0.05, 0.3);
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expect(tilingScheme.positionToTileXY(tooFarWest, 0)).toBeUndefined();
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var tooFarSouth = new Cartographic(0.2, 0.1);
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expect(tilingScheme.positionToTileXY(tooFarSouth, 0)).toBeUndefined();
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var tooFarEast = new Cartographic(0.4, 0.3);
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expect(tilingScheme.positionToTileXY(tooFarEast, 0)).toBeUndefined();
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var tooFarNorth = new Cartographic(0.2, 0.5);
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expect(tilingScheme.positionToTileXY(tooFarNorth, 0)).toBeUndefined();
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});
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it('returns correct tile for position in center of tile', function() {
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var tilingScheme = new GeographicTilingScheme();
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var centerOfWesternRootTile = new Cartographic(-Math.PI / 2.0, 0.0);
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expect(tilingScheme.positionToTileXY(centerOfWesternRootTile, 0)).toEqual(new Cartesian2(0, 0));
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var centerOfNortheastChildOfEasternRootTile = new Cartographic(3.0 * Math.PI / 4.0, Math.PI / 2.0);
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expect(tilingScheme.positionToTileXY(centerOfNortheastChildOfEasternRootTile, 1)).toEqual(new Cartesian2(3, 0));
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});
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it('returns Southeast tile when on the boundary between tiles', function() {
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var tilingScheme = new GeographicTilingScheme();
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var centerOfMap = new Cartographic(0.0, 0.0);
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expect(tilingScheme.positionToTileXY(centerOfMap, 1)).toEqual(new Cartesian2(2, 1));
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});
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it('does not return tile outside valid range', function() {
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var tilingScheme = new GeographicTilingScheme();
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var southeastCorner = new Cartographic(Math.PI, -Math.PI / 2.0);
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expect(tilingScheme.positionToTileXY(southeastCorner, 0)).toEqual(new Cartesian2(1, 0));
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});
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it('uses result parameter if supplied', function() {
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var tilingScheme = new GeographicTilingScheme();
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var centerOfNortheastChildOfEasternRootTile = new Cartographic(3.0 * Math.PI / 4.0, Math.PI / 2.0);
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var resultParameter = new Cartesian2(0, 0);
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var returnedResult = tilingScheme.positionToTileXY(centerOfNortheastChildOfEasternRootTile, 1, resultParameter);
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expect(resultParameter).toEqual(returnedResult);
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expect(resultParameter).toEqual(new Cartesian2(3, 0));
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});
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});
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});
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