private Orbit ForgeOrbit(IOrbitable A, IOrbitable B, double systemAge)
{
double periapsis;
double meanDistance = 0;
double orbitalEccentricity = 0;
do
{
int OrbitalEccentricityRand = 0;
//Mean Separation p10
int meanAnomalyRand = randomSource.Next(1, 10);
if (systemAge > 5)
{
meanAnomalyRand++;
}
else if (systemAge < 1)
{
meanAnomalyRand--;
}
meanAnomalyRand = Physic.Clamp(meanAnomalyRand, 1, 10);
if (1 <= meanAnomalyRand && meanAnomalyRand <= 3)
{
meanDistance = randomSource.Next(1, 10) * 0.05f; OrbitalEccentricityRand -= 2;
} //AU
else if (4 <= meanAnomalyRand && meanAnomalyRand <= 6)
{
meanDistance = randomSource.Next(1, 10) * 0.5f; OrbitalEccentricityRand--;
} //AU
else if (7 <= meanAnomalyRand && meanAnomalyRand <= 8)
{
meanDistance = randomSource.Next(1, 10) * 3; //AU
}
else if (meanAnomalyRand == 9)
{
meanDistance = randomSource.Next(1, 10) * 20; //AU
}
else if (meanAnomalyRand == 10)
{
meanDistance = randomSource.Next(1, 100) * 200; //AU
}
//Orbital Eccentricity
OrbitalEccentricityRand += randomSource.Next(1, 10);
OrbitalEccentricityRand = Physic.Clamp(OrbitalEccentricityRand, 1, 10);
int adder = randomSource.Next(1, 10);
if (1 <= OrbitalEccentricityRand && OrbitalEccentricityRand <= 2)
{
orbitalEccentricity = adder * 0.01f;
}
else if (3 <= OrbitalEccentricityRand && OrbitalEccentricityRand <= 4)
{
orbitalEccentricity = 0.01f + adder * 0.01f;
}
else if (5 <= OrbitalEccentricityRand && OrbitalEccentricityRand <= 6)
{
orbitalEccentricity = 0.02f + adder * 0.01f;
}
else if (7 <= OrbitalEccentricityRand && OrbitalEccentricityRand <= 8)
{
orbitalEccentricity = 0.03f + adder * 0.01f;
}
else if (OrbitalEccentricityRand == 9)
{
orbitalEccentricity = 0.04f + adder * 0.01f;
}
else if (OrbitalEccentricityRand == 10)
{
orbitalEccentricity = 0.05f + adder * 0.04f;
}
periapsis = meanDistance * Physic.AstronomicUnit * (1 + orbitalEccentricity);
}while (periapsis < A.Radius * Physic.SolarRadius + B.Radius * Physic.SolarRadius); //periapsis<radiusA+radiusB
//TEST FOR EDGE CASES (ex radius<body radius)
Orbit orbit;
//Finaly, put together
if (_testMode)
{
orbit = new Orbit(A, B, DateTime.Now, 0.0, 1 * Physic.AstronomicUnit);
}
else
{
orbit = new Orbit(A, B, DateTime.Now, orbitalEccentricity, meanDistance * Physic.AstronomicUnit);
}
return(orbit);
}
public Star GenerateStar(StellarSystem stellarSystem, int starGenerationRand)
{
//star generation
Star star;
string starClass = "";
int sizeCode = 0;
int giantSize = randomSource.Next(1, 10) >= 7 ? 4 : 5;
//manque O et B classes : case 0
if (starGenerationRand == 1)
{
starClass = "A";
sizeCode = giantSize;
}
if (2 <= starGenerationRand && starGenerationRand <= 4)
{
starClass = "F";
sizeCode = giantSize;
}
if (5 <= starGenerationRand && starGenerationRand <= 12)
{
starClass = "G";
sizeCode = giantSize;
}
if (13 <= starGenerationRand && starGenerationRand <= 26)
{
starClass = "K";
sizeCode = 5;
}
if (27 <= starGenerationRand && starGenerationRand <= 36)//white dwarf, D for Degenerate
{
starClass = "D";
sizeCode = 7;
}
if (37 <= starGenerationRand && starGenerationRand <= 85)
{
starClass = "M";
sizeCode = 5;
}
if (86 <= starGenerationRand && starGenerationRand <= 98)//brown dwarf LTY
{
starClass = "L";
}
if (starGenerationRand == 99)//Giants
{
int giantRand = randomSource.Next(1, 10);
if (giantRand == 1)
{
starClass = "F"; sizeCode = 3;
}
if (giantRand == 2)
{
starClass = "G"; sizeCode = 3;
}
if (3 <= giantRand && giantRand <= 7)
{
starClass = "F"; sizeCode = 3;
}
if (giantRand > 8)
{
starClass = "K"; sizeCode = 4;
}
}
//define spectralClass
int spectralClass = (starClass == "K" && sizeCode == 4) ? 0 : randomSource.Next(0, 9);
//White/Brown Dwarf case
int dwarfGenerationRand = randomSource.Next(1, 10);
if (starClass == "D" || starClass == "L")
{
star = new Star("unnamed", stellarSystem)
{
StarClass = starClass,
SizeCode = 0,
SpectralClass = spectralClass
};
}
else
{
//match from the table
BasicStar basicStar = _basicStar.Find(
x => x.StarType == starClass &&
x.SizeCode == sizeCode &&
x.Random == spectralClass
);
star = new Star("unnamed", stellarSystem)
{
StarClass = starClass,
SizeCode = sizeCode,
SpectralClass = spectralClass,
Luminosity = basicStar.Luminosity,
SurfaceTemperature = basicStar.SurfaceTemperature,
Radius = basicStar.Radius,
Mass = basicStar.Mass,
};
}
//Flares Star M3 to M9 1D10*50% periodicaly
//TODO
//subGiant randomisation
if (sizeCode == 4)
{
int subGiantRand = randomSource.Next(1, 10);
float rate = 0;
switch (subGiantRand)
{
case 3: rate = -0.1f; break;
case 4: rate = -0.2f; break;
case 5: rate = -0.3f; break;
case 6: rate = -0.4f; break;
case 7: rate = 0.1f; break;
case 8: rate = 0.2f; break;
case 9: rate = 0.3f; break;
case 10: rate = 0.4f; break;
default: rate = 0; break;
}
star.Mass += star.Mass * rate;
star.Luminosity += star.Luminosity * rate * 2;
star.Radius = (float)Math.Pow(star.Luminosity, 0.5 * (5800 / star.SurfaceTemperature) * (5800 / star.SurfaceTemperature));
}
//age
int ageRandom = randomSource.Next(1, 10);
//from table
StarAge starAge = _systemAgeSource
.FindAll(x =>
x.StarClass == starClass &&
x.SpectralClassMin <= star.SpectralClass &&
star.SpectralClass <= x.SpectralClassMax)
.Find(x => x.Random == ageRandom);
star.Age = starAge.Age;
star.LifeSpan = starAge.LifeSpan;
//giant case & subgiant case
if (sizeCode == 4 || sizeCode == 3)
{
star.Age = 10 * star.Mass / star.Luminosity;
star.Age += star.Age * ((sizeCode == 4)? 0.1f : 0.2f);
star.LifeSpan = star.Age;
}
//calculating temperature and luminosity of dwarves with age modifiers
if (starClass == "L" || starClass == "D")
{
star.LifeSpan = float.MaxValue;
DwarfStar dwarfData =
(starClass == "D")?
_whitedwarfs.Find(x => x.Random == dwarfGenerationRand)
: _browndwarfs.Find(x => x.Random == dwarfGenerationRand);
star.Mass = dwarfData.Mass;
star.Radius = dwarfData.Radius;
dwarfGenerationRand = Physic.Clamp(dwarfGenerationRand + starAge.TemperatureRollModifier, 1, 10);
dwarfData =
(starClass == "D") ?
_whitedwarfs.Find(x => x.Random == dwarfGenerationRand)
: _browndwarfs.Find(x => x.Random == dwarfGenerationRand);
star.SurfaceTemperature = dwarfData.Temperature;
star.Luminosity = Math.Pow(star.Radius, 2) * Math.Pow(star.SurfaceTemperature, 4) / Math.Pow(5800, 4);
}
star.Luminosity += star.Luminosity * starAge.LuminosityModifier;
return(star ?? throw new InvalidOperationException());
}
