/// <summary>
/// Randomly selects an asteroid class. The selection is weighted by the proportions passed
/// to the method.
/// </summary>
///
/// <param name="typeRatios">The proportions in which to select the types.</param>
/// <returns>The selected asteroid class. Shall not be null.</returns>
///
/// <exception cref="InvalidOperationException">Thrown if there are no types from
/// which to choose, or if all proportions are zero, or if any proportion is
/// negative.</exception>
internal static string drawAsteroidType <Dummy> (Proportions <Dummy> typeRatios)
{
try {
return(RandomDist.weightedSample(typeRatios.asPairList()));
} catch (ArgumentException e) {
throw new InvalidOperationException(
Localizer.Format("#autoLOC_CustomAsteroids_ErrorNoClass2"), e);
}
}
/// <summary>
/// Randomly selects an asteroid set. The selection is weighted by the spawn rate of
/// each population; a set with a rate of 2.0 is twice as likely to be chosen as one
/// with a rate of 1.0.
/// </summary>
/// <returns>A reference to the selected asteroid set. Shall not be null.</returns>
///
/// <exception cref="InvalidOperationException">Thrown if there are no sets from
/// which to choose, or if all spawn rates are zero, or if any rate is negative</exception>
internal AsteroidSet drawAsteroidSet()
{
try {
var bins = new List <Pair <AsteroidSet, double> > ();
foreach (AsteroidSet x in asteroidPops)
{
bins.Add(new Pair <AsteroidSet, double> (x, x.getSpawnRate()));
}
return(RandomDist.weightedSample(bins));
} catch (ArgumentException e) {
throw new InvalidOperationException(
Localizer.Format("#autoLOC_CustomAsteroids_ErrorNoGroup"), e);
}
}
public UntrackedObjectClass drawAsteroidSize()
{
if (sizeRatios != null)
{
string sizeName = RandomDist.weightedSample(sizeRatios.asPairList());
if (Enum.TryParse(sizeName, true, out UntrackedObjectClass size))
{
return(size);
}
else
{
Util.errorToPlayerLoc("#autoLOC_CustomAsteroids_ErrorNoSize", sizeName, name);
Debug.LogError($"[CustomAsteroids]: Invalid asteroid size {sizeName} in group {name}.");
return(UntrackedObjectClass.C);
}
}
else
{
// Stock asteroids appear to be hardcoded to be from size A to E, even though there are more classes now
return((UntrackedObjectClass)(int)
(stockSizeCurve.Evaluate((float)RandomDist.drawUniform(0, 1)) * 5));
}
}
