private radian RotationAtDistance(Distance distance, long massAtCenter)
{
// at 147 billion, take 365 days
var year = 31557600; // one year in ticks
var earthOrbitDist = new Distance(147 * BILLION);
radian earthOrbitSpeed = radian.FromDegree(360.0d / year);
var distInEarthOrbits = distance / earthOrbitDist;
var baseStarMass = (5000.0d * MILLION);
var ratio = (double)(massAtCenter / baseStarMass);
var massModifier = Math.Sqrt(ratio);
double dir = (turnsClockwise) ? 1.0d : -1.0d;
return(new radian(massModifier * dir * (earthOrbitSpeed.toDouble() / (distInEarthOrbits * distInEarthOrbits))));
}
private Distance GeneratePlanet(Star star, int relativePosition, Distance currentOutermost)
{
long mass = 0;
Direction startingDirection = Direction.Zero;
Distance startingDistance = Distance.Zero;
int numMoons = 0;
if (relativePosition < 5)
{
mass = rnd.Next(5000, 20000) * THOUSAND;
numMoons = rnd.Next(1, 2) + rnd.Next(-2, 1);
if (numMoons < 0)
{
numMoons = 0;
}
}
else
{
mass = rnd.Next(100, 200) * MILLION;
numMoons = rnd.Next(1, 6) + rnd.Next(1, 6) + rnd.Next(1, 6);
}
startingDistance = currentOutermost + new Distance(rnd.Next(300, 600) * BILLION);
startingDirection = Direction.FromCirclePortion(rnd.NextDouble());
radian rotationPerTick = RotationAtDistance(startingDistance, star.Mass);
var planet = star.AddPlanet("planet" + relativePosition, mass, startingDirection, startingDistance, rotationPerTick);
var currentOutermostMoon = new Distance(10000 * MILLION);
for (int n = 0; n < numMoons; n++)
{
currentOutermostMoon = GenerateMoon(planet, n, mass, currentOutermostMoon);
}
return(startingDistance);
}
public void GenerateAsteroids(int number, string namePrefix, radian orbitSpeed)
{
Distance rangeDepth = OuterRange - InnerRange;
Random rnd = new Random();
Parallel.For(0, number, n =>
{
var ratio = rnd.NextDouble();
var angle = Direction.FromCirclePortion(rnd.NextDouble());
var orbitDistance = new Distance(ratio * rangeDepth + InnerRange);
var asteroid = new Asteroid(
name: string.Format("{0}_{1}", namePrefix, n),
location: new OrbitLocation(Center, angle, orbitDistance, orbitSpeed),
mass: 100000,
parent: this);
AddMember(asteroid);
});
}
public Planet AddPlanet(string name, long mass, Direction startingDirection, Distance startingDistance, radian rotationPerTick)
{
var planet = new Planet(this, name, new OrbitLocation(this, startingDirection, startingDistance, rotationPerTick), mass);
return(AddPlanet(planet));
}
public Planet AddMoon(string name, long mass, Direction startingDirection, Distance startingDistance, radian rotationPerTick)
{
var moon = new Planet(this, name, new OrbitLocation(this, startingDirection, startingDistance, rotationPerTick), mass);
AddMember(moon);
return(moon);
}
