import { Cartesian2 } from "../../Source/Cesium.js";
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import { Cartesian3 } from "../../Source/Cesium.js";
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import { Cartographic } from "../../Source/Cesium.js";
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import { Ellipsoid } from "../../Source/Cesium.js";
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import { Math as CesiumMath } from "../../Source/Cesium.js";
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import { WebMercatorProjection } from "../../Source/Cesium.js";
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describe("Core/WebMercatorProjection", function () {
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it("construct0", function () {
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var projection = new WebMercatorProjection();
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expect(projection.ellipsoid).toEqual(Ellipsoid.WGS84);
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});
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it("construct1", function () {
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var ellipsoid = Ellipsoid.UNIT_SPHERE;
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var projection = new WebMercatorProjection(ellipsoid);
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expect(projection.ellipsoid).toEqual(ellipsoid);
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});
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it("project0", function () {
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var height = 10.0;
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var cartographic = new Cartographic(0.0, 0.0, height);
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var projection = new WebMercatorProjection();
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expect(projection.project(cartographic)).toEqual(
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new Cartesian3(0.0, 0.0, height)
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);
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});
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it("project1", function () {
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var ellipsoid = Ellipsoid.WGS84;
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var cartographic = new Cartographic(Math.PI, CesiumMath.PI_OVER_FOUR, 0.0);
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// expected equations from Wolfram MathWorld:
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// http://mathworld.wolfram.com/MercatorProjection.html
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var expected = new Cartesian3(
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ellipsoid.maximumRadius * cartographic.longitude,
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ellipsoid.maximumRadius *
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Math.log(Math.tan(Math.PI / 4.0 + cartographic.latitude / 2.0)),
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0.0
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);
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var projection = new WebMercatorProjection(ellipsoid);
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expect(projection.project(cartographic)).toEqualEpsilon(
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expected,
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CesiumMath.EPSILON8
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);
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});
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it("project2", function () {
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var ellipsoid = Ellipsoid.UNIT_SPHERE;
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var cartographic = new Cartographic(-Math.PI, CesiumMath.PI_OVER_FOUR, 0.0);
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// expected equations from Wolfram MathWorld:
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// http://mathworld.wolfram.com/MercatorProjection.html
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var expected = new Cartesian3(
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ellipsoid.maximumRadius * cartographic.longitude,
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ellipsoid.maximumRadius *
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Math.log(Math.tan(Math.PI / 4.0 + cartographic.latitude / 2.0)),
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0.0
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);
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var projection = new WebMercatorProjection(ellipsoid);
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expect(projection.project(cartographic)).toEqualEpsilon(
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expected,
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CesiumMath.EPSILON15
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);
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});
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it("project3", function () {
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var ellipsoid = Ellipsoid.WGS84;
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var cartographic = new Cartographic(Math.PI, CesiumMath.PI_OVER_FOUR, 0.0);
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// expected equations from Wolfram MathWorld:
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// http://mathworld.wolfram.com/MercatorProjection.html
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var expected = new Cartesian3(
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ellipsoid.maximumRadius * cartographic.longitude,
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ellipsoid.maximumRadius *
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Math.log(Math.tan(Math.PI / 4.0 + cartographic.latitude / 2.0)),
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0.0
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);
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var projection = new WebMercatorProjection(ellipsoid);
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var result = new Cartesian3(0.0, 0.0, 0.0);
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var returnValue = projection.project(cartographic, result);
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expect(result).toEqual(returnValue);
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expect(result).toEqualEpsilon(expected, CesiumMath.EPSILON8);
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});
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it("unproject0", function () {
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var cartographic = new Cartographic(
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CesiumMath.PI_OVER_TWO,
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CesiumMath.PI_OVER_FOUR,
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12.0
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);
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var projection = new WebMercatorProjection();
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var projected = projection.project(cartographic);
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expect(projection.unproject(projected)).toEqualEpsilon(
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cartographic,
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CesiumMath.EPSILON14
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);
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});
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it("unproject1", function () {
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var cartographic = new Cartographic(
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CesiumMath.PI_OVER_TWO,
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CesiumMath.PI_OVER_FOUR,
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12.0
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);
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var projection = new WebMercatorProjection();
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var projected = projection.project(cartographic);
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var result = new Cartographic(0.0, 0.0, 0.0);
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var returnValue = projection.unproject(projected, result);
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expect(result).toEqual(returnValue);
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expect(result).toEqualEpsilon(cartographic, CesiumMath.EPSILON14);
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});
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it("unproject is correct at corners", function () {
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var projection = new WebMercatorProjection();
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var southwest = projection.unproject(
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new Cartesian2(-20037508.342787, -20037508.342787)
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);
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expect(southwest.longitude).toEqualEpsilon(-Math.PI, CesiumMath.EPSILON12);
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expect(southwest.latitude).toEqualEpsilon(
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CesiumMath.toRadians(-85.05112878),
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CesiumMath.EPSILON11
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);
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var southeast = projection.unproject(
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new Cartesian2(20037508.342787, -20037508.342787)
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);
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expect(southeast.longitude).toEqualEpsilon(Math.PI, CesiumMath.EPSILON12);
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expect(southeast.latitude).toEqualEpsilon(
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CesiumMath.toRadians(-85.05112878),
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CesiumMath.EPSILON11
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);
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var northeast = projection.unproject(
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new Cartesian2(20037508.342787, 20037508.342787)
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);
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expect(northeast.longitude).toEqualEpsilon(Math.PI, CesiumMath.EPSILON12);
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expect(northeast.latitude).toEqualEpsilon(
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CesiumMath.toRadians(85.05112878),
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CesiumMath.EPSILON11
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);
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var northwest = projection.unproject(
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new Cartesian2(-20037508.342787, 20037508.342787)
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);
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expect(northwest.longitude).toEqualEpsilon(-Math.PI, CesiumMath.EPSILON12);
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expect(northwest.latitude).toEqualEpsilon(
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CesiumMath.toRadians(85.05112878),
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CesiumMath.EPSILON11
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);
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});
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it("project is correct at corners.", function () {
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var maxLatitude = WebMercatorProjection.MaximumLatitude;
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var projection = new WebMercatorProjection();
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var southwest = projection.project(
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new Cartographic(-Math.PI, -maxLatitude)
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);
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expect(southwest.x).toEqualEpsilon(-20037508.342787, CesiumMath.EPSILON3);
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expect(southwest.y).toEqualEpsilon(-20037508.342787, CesiumMath.EPSILON3);
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var southeast = projection.project(new Cartographic(Math.PI, -maxLatitude));
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expect(southeast.x).toEqualEpsilon(20037508.342787, CesiumMath.EPSILON3);
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expect(southeast.y).toEqualEpsilon(-20037508.342787, CesiumMath.EPSILON3);
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var northeast = projection.project(new Cartographic(Math.PI, maxLatitude));
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expect(northeast.x).toEqualEpsilon(20037508.342787, CesiumMath.EPSILON3);
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expect(northeast.y).toEqualEpsilon(20037508.342787, CesiumMath.EPSILON3);
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var northwest = projection.project(new Cartographic(-Math.PI, maxLatitude));
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expect(northwest.x).toEqualEpsilon(-20037508.342787, CesiumMath.EPSILON3);
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expect(northwest.y).toEqualEpsilon(20037508.342787, CesiumMath.EPSILON3);
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});
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it("projected y is clamped to valid latitude range.", function () {
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var projection = new WebMercatorProjection();
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var southPole = projection.project(
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new Cartographic(0.0, -CesiumMath.PI_OVER_TWO)
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);
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var southLimit = projection.project(
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new Cartographic(0.0, -WebMercatorProjection.MaximumLatitude)
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);
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expect(southPole.y).toEqual(southLimit.y);
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var northPole = projection.project(
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new Cartographic(0.0, CesiumMath.PI_OVER_TWO)
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);
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var northLimit = projection.project(
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new Cartographic(0.0, WebMercatorProjection.MaximumLatitude)
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);
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expect(northPole.y).toEqual(northLimit.y);
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});
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it("project throws without cartesian", function () {
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var projection = new WebMercatorProjection();
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expect(function () {
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return projection.unproject();
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}).toThrowDeveloperError();
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});
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});
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