import { defined } from "../../Source/Cesium.js";
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import { JulianDate } from "../../Source/Cesium.js";
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import { Math as CesiumMath } from "../../Source/Cesium.js";
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import { Matrix3 } from "../../Source/Cesium.js";
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import { Simon1994PlanetaryPositions as PlanetaryPositions } from "../../Source/Cesium.js";
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import { TimeStandard } from "../../Source/Cesium.js";
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import { Transforms } from "../../Source/Cesium.js";
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describe("Core/Simon1994PlanetaryPositions", function () {
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// Values for the X Y and Z were found using the STK Components GeometryTransformer on the position of the
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// sun center of mass point and the earth J2000 reference frame.
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it("computes correct sun position", function () {
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var date = new JulianDate(2451545, 0, TimeStandard.TAI);
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var sun = PlanetaryPositions.computeSunPositionInEarthInertialFrame(date);
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var X = 26500268539.790234;
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var Y = -132756447253.27325;
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var Z = -57556483362.533806;
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expect(X).toEqualEpsilon(sun.x, CesiumMath.EPSILON2);
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expect(Y).toEqualEpsilon(sun.y, CesiumMath.EPSILON2);
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expect(Z).toEqualEpsilon(sun.z, CesiumMath.EPSILON2);
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date = new JulianDate(2456401.5, 0, TimeStandard.TAI);
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sun = PlanetaryPositions.computeSunPositionInEarthInertialFrame(date);
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X = 131512388940.33589;
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Y = 66661342667.949928;
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Z = 28897975607.905258;
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expect(X).toEqualEpsilon(sun.x, CesiumMath.EPSILON3);
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expect(Y).toEqualEpsilon(sun.y, CesiumMath.EPSILON3);
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expect(Z).toEqualEpsilon(sun.z, CesiumMath.EPSILON3);
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date = new JulianDate(2455998.591667, 0, TimeStandard.TAI);
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sun = PlanetaryPositions.computeSunPositionInEarthInertialFrame(date);
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X = 147109989956.19534;
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Y = -19599996881.217579;
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Z = -8497578102.7696457;
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expect(X).toEqualEpsilon(sun.x, CesiumMath.EPSILON3);
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expect(Y).toEqualEpsilon(sun.y, CesiumMath.EPSILON3);
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expect(Z).toEqualEpsilon(sun.z, CesiumMath.EPSILON3);
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});
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// Values for X Y and Z were found using the STK Components GeometryTransformer on the Simon 1994 moon point and the earth
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// J2000 reference frame.
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it("computes correct moon position", function () {
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var date = new JulianDate(2451545.0, 0, TimeStandard.TAI);
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var moon = PlanetaryPositions.computeMoonPositionInEarthInertialFrame(date);
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var X = -291632410.61232185;
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var Y = -266522146.36821631;
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var Z = -75994518.081043154;
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expect(X).toEqualEpsilon(moon.x, CesiumMath.EPSILON4);
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expect(Y).toEqualEpsilon(moon.y, CesiumMath.EPSILON4);
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expect(Z).toEqualEpsilon(moon.z, CesiumMath.EPSILON4);
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date = new JulianDate(2456401.5, 0, TimeStandard.TAI);
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moon = PlanetaryPositions.computeMoonPositionInEarthInertialFrame(date);
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X = -223792974.4736526;
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Y = 315772435.34490639;
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Z = 97913011.236112773;
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expect(X).toEqualEpsilon(moon.x, CesiumMath.EPSILON4);
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expect(Y).toEqualEpsilon(moon.y, CesiumMath.EPSILON4);
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expect(Z).toEqualEpsilon(moon.z, CesiumMath.EPSILON4);
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date = new JulianDate(2455998.591667, 0, TimeStandard.TAI);
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moon = PlanetaryPositions.computeMoonPositionInEarthInertialFrame(date);
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X = -268426117.00202647;
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Y = -220468861.73998192;
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Z = -110670164.58446842;
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expect(X).toEqualEpsilon(moon.x, CesiumMath.EPSILON4);
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expect(Y).toEqualEpsilon(moon.y, CesiumMath.EPSILON4);
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expect(Z).toEqualEpsilon(moon.z, CesiumMath.EPSILON4);
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});
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it("has the sun rising in the east and setting in the west", function () {
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//Julian dates for 24 hours, starting from July 6th 2011 @ 01:00 UTC
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var transformMatrix = new Matrix3();
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var timesOfDay = [];
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var i;
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for (i = 1; i < 25; i++) {
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var date = new Date("July 6, 2011");
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date.setUTCHours(i, 0, 0, 0);
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timesOfDay.push(JulianDate.fromDate(date));
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}
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var angles = [];
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for (i = 0; i < 24; i++) {
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transformMatrix = Transforms.computeIcrfToFixedMatrix(
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timesOfDay[i],
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transformMatrix
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);
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if (!defined(transformMatrix)) {
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transformMatrix = Transforms.computeTemeToPseudoFixedMatrix(
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timesOfDay[i],
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transformMatrix
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);
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}
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var position = PlanetaryPositions.computeSunPositionInEarthInertialFrame(
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timesOfDay[i]
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);
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Matrix3.multiplyByVector(transformMatrix, position, position);
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angles.push(
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CesiumMath.convertLongitudeRange(Math.atan2(position.y, position.x))
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);
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}
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//Expect a clockwise motion.
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for (i = 1; i < 24; i++) {
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expect(angles[i]).toBeLessThan(angles[i - 1]);
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}
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});
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it("works without a time", function () {
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PlanetaryPositions.computeSunPositionInEarthInertialFrame(undefined);
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});
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});
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