/
FunctionsTests.cs
727 lines (615 loc) · 27.7 KB
/
FunctionsTests.cs
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/*
* Copyright Lamont Granquist (lamont@scriptkiddie.org)
* Dual licensed under the MIT (MIT-LICENSE) license
* and GPLv2 (GPLv2-LICENSE) license or any later version.
*/
using System;
using AssertExtensions;
using MechJebLib.Functions;
using MechJebLib.Primitives;
using MechJebLib.TwoBody;
using Xunit;
using Xunit.Abstractions;
using static MechJebLib.Utils.Statics;
using static System.Math;
namespace MechJebLibTest.MathsTests
{
public class FunctionsTests
{
private const double PERIOD = 86164.0905;
private const double ACC = EPS * 16;
private const double ACC2 = 1e-7; // due west launches have some mathematical irregularities
private readonly ITestOutputHelper _testOutputHelper;
public FunctionsTests(ITestOutputHelper testOutputHelper)
{
_testOutputHelper = testOutputHelper;
}
[Fact]
public void HeadingForInclinationTest1()
{
double heading = Astro.HeadingForInclination(Deg2Rad(0), 0);
heading.ShouldEqual(Deg2Rad(90), 1e-15);
heading = Astro.HeadingForInclination(Deg2Rad(45), 0);
heading.ShouldEqual(Deg2Rad(45), 1e-15);
heading = Astro.HeadingForInclination(Deg2Rad(90), 0);
heading.ShouldEqual(Deg2Rad(0), 1e-15);
heading = Astro.HeadingForInclination(Deg2Rad(135), 0);
heading.ShouldEqual(Deg2Rad(315), 1e-15);
heading = Astro.HeadingForInclination(Deg2Rad(180), 0);
heading.ShouldEqual(Deg2Rad(270), 1e-15);
heading = Astro.HeadingForInclination(Deg2Rad(-45), 0);
heading.ShouldEqual(Deg2Rad(135), 1e-15);
heading = Astro.HeadingForInclination(Deg2Rad(-90), 0);
heading.ShouldEqual(Deg2Rad(180), 1e-15);
heading = Astro.HeadingForInclination(Deg2Rad(-135), 0);
heading.ShouldEqual(Deg2Rad(225), 1e-15);
heading = Astro.HeadingForInclination(Deg2Rad(-180), 0);
heading.ShouldEqual(Deg2Rad(270), 1e-15);
heading = Astro.HeadingForInclination(Deg2Rad(0), Deg2Rad(45));
heading.ShouldEqual(Deg2Rad(90), 1e-15);
heading = Astro.HeadingForInclination(Deg2Rad(45), Deg2Rad(45));
heading.ShouldEqual(Deg2Rad(90), 1e-15);
heading = Astro.HeadingForInclination(Deg2Rad(90), Deg2Rad(45));
heading.ShouldEqual(Deg2Rad(0), 1e-15);
}
[Fact]
public void KeplerianFromStateVectorsTest1()
{
double smaEx = 3.843084377707066e+08;
double eccEx = 5.328149353682574e-02;
double incEx = 4.950221141769940e-01;
double argpEx = 3.486541150390846e+00;
double lanEx = 4.008351366616158e-02;
double tanomEx = 7.853981633974483e-01;
var r = new V3(
-1.455451021873417e+08,
-3.000298697925529e+08,
-1.586943000620733e+08
);
var v = new V3(
9.572921091669031e+02,
-3.895747803416348e+02,
-2.308551508912105e+02
);
double mu = 3.986004418000000e+14;
(double sma, double ecc, double inc, double lan, double argp, double tanom, _) =
Astro.KeplerianFromStateVectors(mu, r, v);
sma.ShouldEqual(smaEx, 4e-15);
ecc.ShouldEqual(eccEx, 8e-15);
inc.ShouldEqual(incEx);
lan.ShouldEqual(lanEx, 4e-15);
argp.ShouldEqual(argpEx, 4e-15);
tanom.ShouldEqual(tanomEx, 8e-15);
}
[Fact]
public void KeplerianFromStateVectorsTest2()
{
double sma, ecc, inc, lan, argp, tanom;
(sma, ecc, inc, lan, argp, tanom, _) = Astro.KeplerianFromStateVectors(1.0, new V3(1, 0, 0), new V3(0, 0, 1));
sma.ShouldEqual(1.0);
ecc.ShouldEqual(0.0);
inc.ShouldEqual(PI / 2);
lan.ShouldEqual(0);
argp.ShouldEqual(0);
tanom.ShouldEqual(0);
(sma, ecc, inc, lan, argp, tanom, _) = Astro.KeplerianFromStateVectors(1.0, new V3(1, 0, 0), new V3(0, 1, 0));
sma.ShouldEqual(1.0);
ecc.ShouldEqual(0.0);
inc.ShouldEqual(0.0);
lan.ShouldEqual(0);
argp.ShouldEqual(0);
tanom.ShouldEqual(0);
(sma, ecc, inc, lan, argp, tanom, _) = Astro.KeplerianFromStateVectors(1.0, new V3(1, 0, 0), new V3(0, 0, -1));
sma.ShouldEqual(1.0);
ecc.ShouldEqual(0.0);
inc.ShouldEqual(PI / 2);
lan.ShouldEqual(PI);
argp.ShouldEqual(0);
tanom.ShouldEqual(PI);
(sma, ecc, inc, lan, argp, tanom, _) = Astro.KeplerianFromStateVectors(1.0, new V3(0, 1, 0), new V3(-1, 0, 0));
sma.ShouldEqual(1.0);
ecc.ShouldEqual(0.0);
inc.ShouldEqual(0.0);
lan.ShouldEqual(0);
argp.ShouldEqual(0);
tanom.ShouldEqual(PI / 2);
}
[Fact]
private void RandomOrbitalElementsForwardAndBack()
{
const int NTRIALS = 5000;
var random = new Random();
for (int i = 0; i < NTRIALS; i++)
{
var r0 = new V3(4 * random.NextDouble() - 2, 4 * random.NextDouble() - 2, 4 * random.NextDouble() - 2);
var v0 = new V3(4 * random.NextDouble() - 2, 4 * random.NextDouble() - 2, 4 * random.NextDouble() - 2);
(double _, double ecc, double inc, double lan, double argp, double nu, double l) =
Astro.KeplerianFromStateVectors(1.0, r0, v0);
(V3 r02, V3 v02) = Astro.StateVectorsFromKeplerian(1.0, l, ecc, inc, lan, argp, nu);
if ((r02 - r0).magnitude / r0.magnitude > 1e-8 || (v02 - v0).magnitude / v0.magnitude > 1e-8)
{
_testOutputHelper.WriteLine($"r0: {r0} v0: {v0}\nr02: {r02} v02: {v02}\n");
}
r02.ShouldEqual(r0, 1e-8);
v02.ShouldEqual(v0, 1e-8);
}
}
[Fact]
public void ECIToPitchHeadingTest1()
{
(double pitch, double heading) = Astro.ECIToPitchHeading(new V3(10, 10, 0), new V3(0, 0, 10));
Assert.Equal(0, pitch, 9);
Assert.Equal(0, heading, 9);
(pitch, heading) = Astro.ECIToPitchHeading(new V3(10, 10, 0), new V3(0, 0, -10));
Assert.Equal(0, pitch, 9);
Assert.Equal(Deg2Rad(180), heading, 9);
(pitch, heading) = Astro.ECIToPitchHeading(new V3(10, 10, 0), new V3(-10, 10, 0));
Assert.Equal(0, pitch, 9);
Assert.Equal(Deg2Rad(90), heading, 9);
(pitch, heading) = Astro.ECIToPitchHeading(new V3(10, 10, 0), new V3(10, -10, 0));
Assert.Equal(0, pitch, 9);
Assert.Equal(Deg2Rad(270), heading, 9);
(pitch, heading) = Astro.ECIToPitchHeading(new V3(10, 10, 0), new V3(10, 10, 0));
Assert.Equal(Deg2Rad(90), pitch, 9);
Assert.Equal(Deg2Rad(90), heading, 9);
(pitch, heading) = Astro.ECIToPitchHeading(new V3(10, 10, 0), new V3(10, 10, Sqrt(200)));
Assert.Equal(Deg2Rad(45), pitch, 9);
Assert.Equal(0, heading, 9);
(pitch, heading) = Astro.ECIToPitchHeading(new V3(10, 10, 0), new V3(10, 10, -Sqrt(200)));
Assert.Equal(Deg2Rad(45), pitch, 9);
Assert.Equal(Deg2Rad(180), heading, 9);
}
[Fact]
public void IncFromStateVectorsTest1()
{
double inc = Astro.IncFromStateVectors(new V3(10, 10, 0), new V3(0, 10, 0));
Assert.Equal(0, inc);
inc = Astro.IncFromStateVectors(new V3(10, 10, 0), new V3(0, 0, 10));
Assert.Equal(PI / 2, inc);
inc = Astro.IncFromStateVectors(new V3(10, 10, 0), new V3(0, -10, 0));
Assert.Equal(PI, inc);
inc = Astro.IncFromStateVectors(new V3(10, 10, 0), new V3(0, 0, -10));
Assert.Equal(PI / 2, inc);
}
[Fact]
public void VelocityForHeadingTest1()
{
V3 vf = Astro.VelocityForHeading(new V3(10, 0, 0), new V3(0, 10, 0), 0);
Assert.Equal(vf[0], 0, 9);
Assert.Equal(vf[1], 0, 9);
Assert.Equal(vf[2], 10, 9);
vf = Astro.VelocityForHeading(new V3(10, 0, 0), new V3(0, 10, 0), PI / 2);
Assert.Equal(vf[0], 0, 9);
Assert.Equal(vf[1], 10, 9);
Assert.Equal(vf[2], 0, 9);
vf = Astro.VelocityForHeading(new V3(10, 0, 0), new V3(0, 10, 0), PI);
Assert.Equal(vf[0], 0, 9);
Assert.Equal(vf[1], 0, 9);
Assert.Equal(vf[2], -10, 9);
vf = Astro.VelocityForHeading(new V3(10, 0, 0), new V3(0, 10, 0), 3 * PI / 2);
Assert.Equal(vf[0], 0, 9);
Assert.Equal(vf[1], -10, 9);
Assert.Equal(vf[2], 0, 9);
vf = Astro.VelocityForHeading(new V3(10, 0, 0), new V3(10, 10, 0), 0);
Assert.Equal(vf[0], 10, 9);
Assert.Equal(vf[1], 0, 9);
Assert.Equal(vf[2], 10, 9);
vf = Astro.VelocityForHeading(new V3(10, 0, 0), new V3(10, 10, 0), PI / 2);
Assert.Equal(vf[0], 10, 9);
Assert.Equal(vf[1], 10, 9);
Assert.Equal(vf[2], 0, 9);
vf = Astro.VelocityForHeading(new V3(10, 0, 0), new V3(10, 10, 0), PI);
Assert.Equal(vf[0], 10, 9);
Assert.Equal(vf[1], 0, 9);
Assert.Equal(vf[2], -10, 9);
vf = Astro.VelocityForHeading(new V3(10, 0, 0), new V3(10, 10, 0), 3 * PI / 2);
Assert.Equal(vf[0], 10, 9);
Assert.Equal(vf[1], -10, 9);
Assert.Equal(vf[2], 0, 9);
}
[Fact]
public void VelocityForInclinationTest1()
{
V3 vf = Astro.VelocityForInclination(new V3(10, 0, 0), new V3(0, 10, 0), 0);
Assert.Equal(vf[0], 0, 9);
Assert.Equal(vf[1], 10, 9);
Assert.Equal(vf[2], 0, 9);
vf = Astro.VelocityForInclination(new V3(10, 0, 0), new V3(0, 10, 0), PI / 2);
Assert.Equal(vf[0], 0, 9);
Assert.Equal(vf[1], 0, 9);
Assert.Equal(vf[2], 10, 9);
vf = Astro.VelocityForInclination(new V3(10, 0, 0), new V3(0, 10, 0), PI);
Assert.Equal(vf[0], 0, 9);
Assert.Equal(vf[1], -10, 9);
Assert.Equal(vf[2], 0, 9);
vf = Astro.VelocityForInclination(new V3(10, 0, 0), new V3(0, 10, 0), -PI / 2);
Assert.Equal(vf[0], 0, 9);
Assert.Equal(vf[1], 0, 9);
Assert.Equal(vf[2], -10, 9);
vf = Astro.VelocityForInclination(new V3(10, 0, 0), new V3(10, 10, 0), 0);
Assert.Equal(vf[0], 10, 9);
Assert.Equal(vf[1], 10, 9);
Assert.Equal(vf[2], 0, 9);
}
[Fact]
public void TimeToNextRadiusTest()
{
const double mu = 3.986004418e+14;
const double rearth = 6.371e+6;
const double r185 = rearth + 185e+3;
const double r1000 = rearth + 1000e+3;
(double sma, double _) = Astro.SmaEccFromApsides(r185, r1000);
double v185 = Astro.VmagFromVisViva(mu, sma, r185);
var r0 = new V3(r185, 0, 0);
var v0 = new V3(0, v185, 0);
double period = Astro.PeriodFromStateVectors(mu, r0, v0);
(V3 r1, V3 _) = Shepperd.Solve(mu, period / 3.0, r0, v0);
(V3 r2, V3 _) = Shepperd.Solve(mu, period * 0.75, r0, v0);
Assert.Equal(period / 3.0, Astro.TimeToNextRadius(mu, r0, v0, r1.magnitude), 9);
Assert.Equal(period * 0.25, Astro.TimeToNextRadius(mu, r0, v0, r2.magnitude), 9);
Assert.Equal(period / 2.0, Astro.TimeToNextRadius(mu, r0, v0, r1000), 9);
}
[Fact]
public void ApoapsisFromStateVectorsTest()
{
const double mu = 3.986004418e+14;
const double rearth = 6.371e+6;
const double r185 = rearth + 185e+3;
const double r1000 = rearth + 1000e+3;
(double sma, double _) = Astro.SmaEccFromApsides(r185, r1000);
double v185 = Astro.VmagFromVisViva(mu, sma, r185);
var r0 = new V3(r185, 0, 0);
var v0 = new V3(0, v185, 0);
Assert.Equal(1.0, Astro.ApoapsisFromStateVectors(mu, r0, v0) / r1000, 14);
Assert.Equal(1.0, Astro.PeriapsisFromStateVectors(mu, r0, v0) / r185, 14);
}
[Fact]
public void ApsidesFromKeplerianTest()
{
const double rearth = 6.371e+6;
const double r185 = rearth + 185e+3;
const double r1000 = rearth + 1000e+3;
(double sma, double ecc) = Astro.SmaEccFromApsides(r185, r1000);
Assert.Equal(r185, Astro.PeriapsisFromKeplerian(sma, ecc));
Assert.Equal(r1000, Astro.ApoapsisFromKeplerian(sma, ecc));
}
[Fact]
private void Test90()
{
for (int i = 0; i < 8; i++)
{
for (int j = 0; j < 8; j++)
{
double lng = i * 45;
double lan = j * 45;
// zero degree advance
double delay = PERIOD / 8 * ((j - i + 8) % 8);
if (delay != 0)
{
Astro.TimeToPlane(PERIOD, 28.608, lng, lan, 90).ShouldEqual(delay, ACC);
Astro.TimeToPlane(PERIOD, -28.608, lng, lan, 90).ShouldEqual(delay, ACC);
}
// reverse
delay = PERIOD / 8 * ((i - j + 8) % 8);
if (delay != 0)
{
Astro.TimeToPlane(-PERIOD, 28.608, lng, lan, 90).ShouldEqual(delay, ACC);
Astro.TimeToPlane(-PERIOD, -28.608, lng, lan, 90).ShouldEqual(delay, ACC);
}
// advance by 180 degrees
delay = PERIOD / 8 * ((j - i + 8 + 4) % 8);
if (delay != 0)
{
Astro.TimeToPlane(PERIOD, 28.608, lng, lan, -90).ShouldEqual(delay, ACC);
Astro.TimeToPlane(PERIOD, -28.608, lng, lan, -90).ShouldEqual(delay, ACC);
}
// reverse and advance by 180 degrees
delay = PERIOD / 8 * ((i - j + 8 + 4) % 8);
if (delay != 0)
{
Astro.TimeToPlane(-PERIOD, 28.608, lng, lan, -90).ShouldEqual(delay, ACC);
Astro.TimeToPlane(-PERIOD, -28.608, lng, lan, -90).ShouldEqual(delay, ACC);
}
}
}
}
[Fact]
private void Test45At45()
{
for (int i = 0; i < 8; i++)
{
for (int j = 0; j < 8; j++)
{
double lng = i * 45;
double lan = j * 45;
// advance by 90 degrees
double delay = PERIOD / 8 * ((j - i + 8 + 2) % 8);
if (delay != 0)
{
Astro.TimeToPlane(PERIOD, 45, lng, lan, 45).ShouldEqual(delay, ACC);
Astro.TimeToPlane(PERIOD, 45, lng, lan, -45).ShouldEqual(delay, ACC);
}
// advance by 270 degrees
delay = PERIOD / 8 * ((j - i + 8 + 6) % 8);
if (delay != 0)
{
Astro.TimeToPlane(PERIOD, -45, lng, lan, 45).ShouldEqual(delay, ACC);
Astro.TimeToPlane(PERIOD, -45, lng, lan, -45).ShouldEqual(delay, ACC);
}
// reverse and advance by 270 degrees
delay = PERIOD / 8 * ((i - j + 8 + 6) % 8);
if (delay != 0)
{
Astro.TimeToPlane(-PERIOD, 45, lng, lan, 45).ShouldEqual(delay, ACC);
Astro.TimeToPlane(-PERIOD, 45, lng, lan, -45).ShouldEqual(delay, ACC);
}
// reverse and advance by 90 degrees
delay = PERIOD / 8 * ((i - j + 8 + 2) % 8);
if (delay != 0)
{
Astro.TimeToPlane(-PERIOD, -45, lng, lan, 45).ShouldEqual(delay, ACC);
Astro.TimeToPlane(-PERIOD, -45, lng, lan, -45).ShouldEqual(delay, ACC);
}
}
}
}
[Fact]
private void Test135At45()
{
for (int i = 0; i < 8; i++)
{
for (int j = 0; j < 8; j++)
{
double lng = i * 45;
double lan = j * 45;
// advance by 270 degrees
double delay = PERIOD / 8 * ((j - i + 8 + 6) % 8);
if (delay != 0)
{
Astro.TimeToPlane(PERIOD, 45, lng, lan, 135).ShouldEqual(delay, ACC2);
Astro.TimeToPlane(PERIOD, 45, lng, lan, -135).ShouldEqual(delay, ACC2);
}
// advance by 90 degrees
delay = PERIOD / 8 * ((j - i + 8 + 2) % 8);
if (delay != 0)
{
Astro.TimeToPlane(PERIOD, -45, lng, lan, 135).ShouldEqual(delay, ACC2);
Astro.TimeToPlane(PERIOD, -45, lng, lan, -135).ShouldEqual(delay, ACC2);
}
// reverse and advance by 90 degrees
delay = PERIOD / 8 * ((i - j + 8 + 2) % 8);
if (delay != 0)
{
Astro.TimeToPlane(-PERIOD, 45, lng, lan, 135).ShouldEqual(delay, ACC2);
Astro.TimeToPlane(-PERIOD, 45, lng, lan, -135).ShouldEqual(delay, ACC2);
}
// reverse and advance by 270 degrees
delay = PERIOD / 8 * ((i - j + 8 + 6) % 8);
if (delay != 0)
{
Astro.TimeToPlane(-PERIOD, -45, lng, lan, 135).ShouldEqual(delay, ACC2);
Astro.TimeToPlane(-PERIOD, -45, lng, lan, -135).ShouldEqual(delay, ACC2);
}
}
}
}
[Fact]
private void EquatorialAt45()
{
for (int i = 0; i < 8; i++)
{
for (int j = 0; j < 8; j++)
{
double lng = i * 45;
double lan = j * 45;
// advance by 90 degrees
double delay = PERIOD / 8 * ((j - i + 8 + 2) % 8);
if (delay != 0)
{
Astro.TimeToPlane(PERIOD, 45, lng, lan, 0).ShouldEqual(delay, ACC);
}
// advance by 270 degrees
delay = PERIOD / 8 * ((j - i + 8 + 6) % 8);
if (delay != 0)
{
Astro.TimeToPlane(PERIOD, -45, lng, lan, 0).ShouldEqual(delay, ACC);
}
// reverse and advance by 270 degrees
delay = PERIOD / 8 * ((i - j + 8 + 6) % 8);
if (delay != 0)
{
Astro.TimeToPlane(-PERIOD, 45, lng, lan, 0).ShouldEqual(delay, ACC);
}
// reverse and advance by 90 degrees
delay = PERIOD / 8 * ((i - j + 8 + 2) % 8);
if (delay != 0)
{
Astro.TimeToPlane(-PERIOD, -45, lng, lan, 0).ShouldEqual(delay, ACC);
}
}
}
}
[Fact]
private void RetrogradeEquatorialAt45()
{
for (int i = 0; i < 8; i++)
{
for (int j = 0; j < 8; j++)
{
double lng = i * 45;
double lan = j * 45;
// advance by 270 degrees
double delay = PERIOD / 8 * ((j - i + 8 + 6) % 8);
if (delay != 0)
{
Astro.TimeToPlane(PERIOD, 45, lng, lan, 180).ShouldEqual(delay, ACC2);
Astro.TimeToPlane(PERIOD, 45, lng, lan, -180).ShouldEqual(delay, ACC2);
}
// advance by 90 degrees
delay = PERIOD / 8 * ((j - i + 8 + 2) % 8);
if (delay != 0)
{
Astro.TimeToPlane(PERIOD, -45, lng, lan, 180).ShouldEqual(delay, ACC2);
Astro.TimeToPlane(PERIOD, -45, lng, lan, -180).ShouldEqual(delay, ACC2);
}
// reverse and advance by 90 degrees
delay = PERIOD / 8 * ((i - j + 8 + 2) % 8);
if (delay != 0)
{
Astro.TimeToPlane(-PERIOD, 45, lng, lan, 180).ShouldEqual(delay, ACC2);
Astro.TimeToPlane(-PERIOD, 45, lng, lan, -180).ShouldEqual(delay, ACC2);
}
// reverse and advance by 270 degrees
delay = PERIOD / 8 * ((i - j + 8 + 6) % 8);
if (delay != 0)
{
Astro.TimeToPlane(-PERIOD, -45, lng, lan, 180).ShouldEqual(delay, ACC2);
Astro.TimeToPlane(-PERIOD, -45, lng, lan, -180).ShouldEqual(delay, ACC2);
}
}
}
}
[Fact]
private void Test47AtKSCLat()
{
// this produces a 330 degree LAN from 28.608 so everything is 30 degrees offset
const double inc = 47.486638356389;
for (int i = 0; i < 12; i++)
{
for (int j = 0; j < 12; j++)
{
double lng = i * 30;
double lan = j * 30;
// advance by 30 degrees
double delay = PERIOD / 12 * ((j - i + 12 + 1) % 12);
if (delay != 0)
{
Astro.TimeToPlane(PERIOD, 28.608, lng, lan, inc).ShouldEqual(delay, ACC);
}
// advance by 150 degrees
delay = PERIOD / 12 * ((j - i + 12 + 5) % 12);
if (delay != 0)
{
Astro.TimeToPlane(PERIOD, 28.608, lng, lan, -inc).ShouldEqual(delay, ACC);
}
// advance by 330 degrees
delay = PERIOD / 12 * ((j - i + 12 + 11) % 12);
if (delay != 0)
{
Astro.TimeToPlane(PERIOD, -28.608, lng, lan, inc).ShouldEqual(delay, ACC);
}
// advance by 210 degrees
delay = PERIOD / 12 * ((j - i + 12 + 7) % 12);
if (delay != 0)
{
Astro.TimeToPlane(PERIOD, -28.608, lng, lan, -inc).ShouldEqual(delay, ACC);
}
// reverse and advance by 330 degrees
delay = PERIOD / 12 * ((i - j + 12 + 11) % 12);
if (delay != 0)
{
Astro.TimeToPlane(-PERIOD, 28.608, lng, lan, inc).ShouldEqual(delay, ACC);
}
// reverse and advance by 210 degrees
delay = PERIOD / 12 * ((i - j + 12 + 7) % 12);
if (delay != 0)
{
Astro.TimeToPlane(-PERIOD, 28.608, lng, lan, -inc).ShouldEqual(delay, ACC);
}
// advance by 30 degrees
delay = PERIOD / 12 * ((i - j + 12 + 1) % 12);
if (delay != 0)
{
Astro.TimeToPlane(-PERIOD, -28.608, lng, lan, inc).ShouldEqual(delay, ACC);
}
// advance by 150 degrees
delay = PERIOD / 12 * ((i - j + 12 + 5) % 12);
if (delay != 0)
{
Astro.TimeToPlane(-PERIOD, -28.608, lng, lan, -inc).ShouldEqual(delay, ACC);
}
}
}
}
[Fact]
private void Test132AtKSCLat()
{
// similar to the 47 degree tests only retrograde
const double inc = 180 - 47.486638356389;
for (int i = 0; i < 12; i++)
{
for (int j = 0; j < 12; j++)
{
double lng = i * 30;
double lan = j * 30;
// advance by 330 degrees
double delay = PERIOD / 12 * ((j - i + 12 + 11) % 12);
if (delay != 0)
{
Astro.TimeToPlane(PERIOD, 28.608, lng, lan, inc).ShouldEqual(delay, ACC);
}
// advance by 210 degrees
delay = PERIOD / 12 * ((j - i + 12 + 7) % 12);
if (delay != 0)
{
Astro.TimeToPlane(PERIOD, 28.608, lng, lan, -inc).ShouldEqual(delay, ACC);
}
// advance by 30 degrees
delay = PERIOD / 12 * ((j - i + 12 + 1) % 12);
if (delay != 0)
{
Astro.TimeToPlane(PERIOD, -28.608, lng, lan, inc).ShouldEqual(delay, ACC);
}
// advance by 150 degrees
delay = PERIOD / 12 * ((j - i + 12 + 5) % 12);
if (delay != 0)
{
Astro.TimeToPlane(PERIOD, -28.608, lng, lan, -inc).ShouldEqual(delay, ACC);
}
// reverse and advance by 30 degrees
delay = PERIOD / 12 * ((i - j + 12 + 1) % 12);
if (delay != 0)
{
Astro.TimeToPlane(-PERIOD, 28.608, lng, lan, inc).ShouldEqual(delay, ACC);
}
// reverse and advance by 150 degrees
delay = PERIOD / 12 * ((i - j + 12 + 5) % 12);
if (delay != 0)
{
Astro.TimeToPlane(-PERIOD, 28.608, lng, lan, -inc).ShouldEqual(delay, ACC);
}
// reverse and advance by 330 degrees
delay = PERIOD / 12 * ((i - j + 12 + 11) % 12);
if (delay != 0)
{
Astro.TimeToPlane(-PERIOD, -28.608, lng, lan, inc).ShouldEqual(delay, ACC);
}
// reverse and advance by 210 degrees
delay = PERIOD / 12 * ((i - j + 12 + 7) % 12);
if (delay != 0)
{
Astro.TimeToPlane(-PERIOD, -28.608, lng, lan, -inc).ShouldEqual(delay, ACC);
}
}
}
}
[Fact]
private void Poles()
{
for (int i = 0; i < 8; i++)
{
for (int j = 0; j < 8; j++)
{
for (int k = 0; k <= 8; k++)
{
double lng = i * 45;
double lan = j * 45;
double inc = k * 45 - 180;
Astro.TimeToPlane(PERIOD, 90, lng, lan, inc).ShouldBeZero(ACC);
Astro.TimeToPlane(PERIOD, -90, lng, lan, inc).ShouldBeZero(ACC);
}
}
}
}
}
}