private StarSystemBuilder generateSystem(StarNamer namer, Vector2D position, Random rng, SystemEvaluator evaluator, double startingScore, double potentialScore, bool isHomeSystem)
{
var starType = isHomeSystem ? this.homeStarType : starTypes[rng.Next(starTypes.Length)];
var starName = namer.NextName();
var fixedParts = new StarSystemBuilder(
starType.Hue,
(float)Methods.Lerp(rng.NextDouble(), starType.MinScale, starType.Maxscale),
starName, position,
new List <StarTraitType>(starType.Traits.Select(x => this.starTraits[x]))
);
var usedPositions = new HashSet <int>();
if (isHomeSystem)
{
fixedParts.AddPlanet(this.homeworldPosition, PlanetType.Rock, this.homeworldSize, this.homeworldTraits.Select(x => this.planetTraits[x]));
usedPositions.Add(this.homeworldPosition);
}
var systems = new List <StarSystemBuilder>();
for (int i = 0; i < SysGenRepeats; i++)
{
var system = new StarSystemBuilder(fixedParts);
systems.Add(system);
var planets = rng.Next(5);
var bodyPosition = 1;
for (int p = 0; p < planets; p++)
{
var type = bodyTypes()[rng.Next(3)];
var size = Math.Round(Methods.Lerp(rng.NextDouble(), 50, 200));
while (usedPositions.Contains(bodyPosition))
{
bodyPosition++;
}
system.AddPlanet(bodyPosition, type, size, randomTraits(rng, type, size));
bodyPosition++;
}
}
return(Methods.FindWorst(systems, x => Methods.MeanSquareError(
evaluator.StartingScore(x) - startingScore,
evaluator.PotentialScore(x) - potentialScore
)));
}
public IEnumerable <StarSystem> Generate(Random rng, StarPositions starPositions, IEnumerable <BodyTraitType> planetTraits)
{
int colorI = 0;
var namer = new StarNamer(starPositions.Stars.Length);
//UNDONE(later): Picks star types cyclicaly
//TODO(later): Randomize star type distribution
//TODO(later): Star size and radiation distribution
foreach (var position in starPositions.Stars)
{
var star = new StarData(starTypes[colorI++ % starTypes.Length].Hue, 1, namer.NextName(), position, new List <BodyTraitType>());
yield return(new StarSystem(
star,
new Planet[] {
new Planet(star, 1, PlanetType.Rock, 100, planetTraits.Take(1).ToList()),
new Planet(star, 2, PlanetType.Asteriod, 100, new List <BodyTraitType>()),
new Planet(star, 3, PlanetType.GasGiant, 100, new List <BodyTraitType>()),
}));
}
}