public Galaxy(double width, double height, int systems, int minBodsPerSys, int maxBodsPerSys)
{
this.width = width;
this.height = height;
root = new Barnes_Hut.BHNode(width, height);
Bodies = new List <CelestialBody>(systems * maxBodsPerSys);
Planets = new List <Planet>();
Stars = new List <Star>();
Count = N;
double totalMass = 0;
for (int i = 0; i < systems; i++)
{
double posX, posY;
double theta = Rand.NextDouble() * (Math.PI * 2);//GET VALUE BETWEEN 0 AND 2PI
double radius = Rand.NextDouble();
if (width > height)
{
radius *= height / 2;
}
else
{
radius *= width / 2;
}
posX = radius * Math.Cos(theta);
posY = radius * Math.Sin(theta);
double randomValue = Rand.Next(0, 100000000);
randomValue /= 100000000;
Star star = Star.GenerateRandomStar(i, randomValue, posX, posY);
Bodies.Add(star);
Stars.Add(star);
totalMass += star.mass;
double bodies = Rand.Next(minBodsPerSys, maxBodsPerSys);
for (int j = 0; j < bodies; j++)
{
double randomValue2 = Rand.Next(0, 100000000);
randomValue2 /= 100000000;
double theta2 = Rand.NextDouble() * (Math.PI * 2);
double posX2, posY2;
double radius2 = Rand.Next((int)(star.size * Constants.MIN_DISTANCE_RATIO), (int)(star.size * Constants.MAX_DISTANCE_RATIO));
posX2 = radius2 * Math.Cos(theta2);
posY2 = radius2 * Math.Sin(theta2);
posX2 += posX;
posY2 += posY;
Planet planet = Planet.GeneratePlanet(systems + (i * j), randomValue2, posX2, posY2, star, theta2);
Planets.Add(planet);
star.OrbitingPlanets.Add(planet);
totalMass += planet.mass;
}
}
//Spawn black hole in middle
//double px = 0, py = 0;
//double m = 10e15 * N;
//Bodies.Insert(0, new CelestialBody(0, px, py, m, m / 200));
//Galaxy.Instance = this;
//for (int i = 1; i < N; i++) //Apply orbital velocity
//{
// GenerateOrbitalAcceleration(Bodies[i], m);
// Bodies[i].Update();
//}
this.N = Bodies.Count;
}
/// <summary>
/// Generate a star
/// </summary>
/// <param name="randomValue">Value between 0 and 1</param>
/// <param name="id">ID of celestial body</param>
/// <param name="posX">X coordinate</param>
/// <param name="posY">Y coordinate</param>
/// <returns></returns>
public static Star GenerateRandomStar(int id, double randomValue, double posX, double posY)
{
Class starClass;
double size = Constants.SUN_SIZE;
double mass = Constants.SUN_MASS;
randomValue *= 100;
if (randomValue <= Constants.STAR_O_CLASS_CUTOFF) //CLASS O STAR, >= 16 M
{
double massscale = 6 + (randomValue / Constants.STAR_O_CLASS_CUTOFF) * 4;
double sizescale = 3 + (randomValue / Constants.STAR_O_CLASS_CUTOFF) * 2;
mass *= massscale;
size *= sizescale;
starClass = Class.O;
}
else if (randomValue <= Constants.STAR_B_CLASS_CUTOFF + Constants.STAR_O_CLASS_CUTOFF) //CLASS B STAR, 2.1 -> 16M
{
double massscale = 2.1 + (randomValue / (Constants.STAR_B_CLASS_CUTOFF + Constants.STAR_O_CLASS_CUTOFF)) * 13.9;
double sizescale = 1.9 + (randomValue / (Constants.STAR_B_CLASS_CUTOFF + Constants.STAR_O_CLASS_CUTOFF)) * 1.1;
mass *= massscale;
size *= sizescale;
starClass = Class.B;
}
else if (randomValue <= Constants.STAR_A_CLASS_CUTOFF + Constants.STAR_B_CLASS_CUTOFF + Constants.STAR_O_CLASS_CUTOFF)//CLASS A 1.4 -> 2.1M
{
double massscale = 1.4 + (randomValue / (Constants.STAR_A_CLASS_CUTOFF + Constants.STAR_B_CLASS_CUTOFF + Constants.STAR_O_CLASS_CUTOFF)) * 0.7;
double sizescale = 1.4 + (randomValue / (Constants.STAR_A_CLASS_CUTOFF + Constants.STAR_B_CLASS_CUTOFF + Constants.STAR_O_CLASS_CUTOFF)) * 0.5;
mass *= massscale;
size *= sizescale;
starClass = Class.A;
}
else if (randomValue <= Constants.STAR_F_CLASS_CUTOFF + Constants.STAR_A_CLASS_CUTOFF + Constants.STAR_B_CLASS_CUTOFF +
Constants.STAR_O_CLASS_CUTOFF) //CLASS F 1.04 -> 1.4M
{
double massscale = 1.04 + (randomValue / (Constants.STAR_F_CLASS_CUTOFF + Constants.STAR_A_CLASS_CUTOFF + Constants.STAR_B_CLASS_CUTOFF +
Constants.STAR_O_CLASS_CUTOFF)) * 0.3;
double sizescale = 1.04 + (randomValue / (Constants.STAR_F_CLASS_CUTOFF + Constants.STAR_A_CLASS_CUTOFF + Constants.STAR_B_CLASS_CUTOFF +
Constants.STAR_O_CLASS_CUTOFF)) * 0.26;
mass *= massscale;
size *= sizescale;
starClass = Class.F;
}
else if (randomValue <= Constants.STAR_G_CLASS_CUTOFF + Constants.STAR_F_CLASS_CUTOFF + Constants.STAR_A_CLASS_CUTOFF +
Constants.STAR_B_CLASS_CUTOFF + Constants.STAR_O_CLASS_CUTOFF) //CLASS G 0.8 -> 1.04M
{
double massscale = 0.8 + (randomValue / (Constants.STAR_G_CLASS_CUTOFF + Constants.STAR_F_CLASS_CUTOFF + Constants.STAR_A_CLASS_CUTOFF +
Constants.STAR_B_CLASS_CUTOFF + Constants.STAR_O_CLASS_CUTOFF)) * 0.24;
double sizescale = 0.8 + (randomValue / (Constants.STAR_G_CLASS_CUTOFF + Constants.STAR_F_CLASS_CUTOFF + Constants.STAR_A_CLASS_CUTOFF +
Constants.STAR_B_CLASS_CUTOFF + Constants.STAR_O_CLASS_CUTOFF)) * 0.24;
mass *= massscale;
size *= sizescale;
starClass = Class.G;
}
else if (randomValue <= Constants.STAR_K_CLASS_CUTOFF + Constants.STAR_G_CLASS_CUTOFF + Constants.STAR_F_CLASS_CUTOFF +
Constants.STAR_A_CLASS_CUTOFF + Constants.STAR_B_CLASS_CUTOFF + Constants.STAR_O_CLASS_CUTOFF)
{
double massscale = 0.45 + (randomValue / (Constants.STAR_K_CLASS_CUTOFF + Constants.STAR_G_CLASS_CUTOFF + Constants.STAR_F_CLASS_CUTOFF +
Constants.STAR_A_CLASS_CUTOFF + Constants.STAR_B_CLASS_CUTOFF + Constants.STAR_O_CLASS_CUTOFF)) * 0.35;
double sizescale = 0.45 + (randomValue / (Constants.STAR_K_CLASS_CUTOFF + Constants.STAR_G_CLASS_CUTOFF + Constants.STAR_F_CLASS_CUTOFF +
Constants.STAR_A_CLASS_CUTOFF + Constants.STAR_B_CLASS_CUTOFF + Constants.STAR_O_CLASS_CUTOFF)) * 0.35;
mass *= massscale;
size *= sizescale;
starClass = Class.K;
}
else
{
double massscale = 0.08 + (randomValue / (Constants.STAR_M_CLASS_CUTOFF + Constants.STAR_K_CLASS_CUTOFF + Constants.STAR_G_CLASS_CUTOFF + Constants.STAR_F_CLASS_CUTOFF +
Constants.STAR_A_CLASS_CUTOFF + Constants.STAR_B_CLASS_CUTOFF + Constants.STAR_O_CLASS_CUTOFF)) * 0.37;
double sizescale = 0.08 + (randomValue / (Constants.STAR_M_CLASS_CUTOFF + Constants.STAR_K_CLASS_CUTOFF + Constants.STAR_G_CLASS_CUTOFF + Constants.STAR_F_CLASS_CUTOFF +
Constants.STAR_A_CLASS_CUTOFF + Constants.STAR_B_CLASS_CUTOFF + Constants.STAR_O_CLASS_CUTOFF)) * 0.37;
mass *= massscale;
size *= sizescale;
starClass = Class.M;
}
Star star = new Star(id, posX, posY, mass, size, starClass);
return(star);
}
