/// <summary>Initializes an instance of the Orbit class with a specified parent and random number generator belonging to the orbiting body.</summary>
/// <param name="parent">The body which the orbit circumscribes.</param>
/// <param name="random">The seeded random number generator belonging to the orbiting body.</param>
public Orbit(Body parent, StringSeededRandom random)
{
Parent = parent;
double minA;
if (parent.Children.Count == 0)
{
minA = Sqrt(G * parent.Mass / Pow(10, random.Uniform("first satellite gravity", -2, 0)));
}
else
{
minA = 1.5 * parent.Children[parent.Children.Count - 1].Orbit.SemiMajorAxis;
}
if (parent.HasRing)
{
if (parent.InnerRingRadius < minA && minA < parent.OuterRingRadius)
{
minA = parent.OuterRingRadius;
}
}
var maxA = 1.5 * minA;
if (parent.HasRing)
{
if (parent.InnerRingRadius < maxA && maxA < parent.OuterRingRadius)
{
maxA = parent.InnerRingRadius;
}
}
if (maxA > parent.SphereOfInfluence)
{
maxA = parent.SphereOfInfluence;
}
Eccentricity = Pow(random.Rand("eccentricity"), 10);
SemiMajorAxis = random.Uniform("semi-major axis", minA, maxA);
Inclination = PI / 2 * Pow(random.Rand("inclination"), 10);
AscendingNode = random.Uniform("ascending node", 0, 2 * PI);
ArgumentOfPeriapsis = random.Uniform("argument of ascending node", 0, 2 * PI);
MeanAnomaly = random.Uniform("mean anomaly", 0, 2 * PI);
Period = OrbitalPeriod(SemiMajorAxis, parent.Mass);
Periapsis = Periapsis(Eccentricity, SemiMajorAxis);
Apoapsis = Apoapsis(Eccentricity, SemiMajorAxis);
Velocity = OrbitalVelocity(SemiMajorAxis, Period);
}
/// <summary>Initializes a new instance of the Names class with a string to seed the random number generator.</summary>
/// <param name="seedString">String to seed the random number generator.</param>
public Names(string seedString)
{
Random = new StringSeededRandom(seedString + " names");
var rgx = new Regex("[^a-zA-Z]");
var line = "";
using (var resourceStream = Assembly.GetExecutingAssembly().GetManifestResourceStream("Universe.NameList.txt"))
{
if (resourceStream != null)
{
using (var reader = new StreamReader(resourceStream))
{
line = reader.ReadToEnd();
}
}
}
foreach (var word in line.Split(','))
{
WordList.Add("`" + rgx.Replace(word, "").ToLower() + "`");
}
var totals = new double[27, 27];
var initialsTotal = 0;
foreach (var word in WordList)
{
Initials[word[1] - 96]++;
initialsTotal++;
for (var i = 0; i < word.Length - 2; i++)
{
Probabilities[word[i] - 96, word[i + 1] - 96, word[i + 2] - 96]++;
totals[word[i] - 96, word[i + 1] - 96]++;
}
}
for (var i = 0; i < 27; i++)
{
Initials[i] /= initialsTotal;
for (var j = 0; j < 27; j++)
{
for (var k = 0; k < 27; k++)
{
Probabilities[i, j, k] /= totals[i, j];
}
}
}
}
/// <summary>Initializes a new instance of the Body class with a specified name.</summary>
/// <param name="star">The star which the body is closest to.</param>
/// <param name="parent">The parent body which the body orbits around.</param>
/// <param name="name">The name of the body, used to seed the random number generator.</param>
protected Body(Body parent, Star star, string name = null)
{
Parent = parent;
Star = star;
if (name == null)
{
name = new Names(Name).Name(new Random().NextDouble().ToString(CultureInfo.InvariantCulture));
}
Name = name.ToLower();
if (this is Star)
{
System = Name;
}
else if (Star != null)
{
System = Star.Name;
}
Random = new StringSeededRandom(name);
}