/// <summary>Initializes a new weighted die with known weights.</summary>
/// <param name="rnd"><c>Random</c> object to be used when rolling the die.</param>
/// <param name="weights">Pre-calculated weights of the sides of the die. Total of weights must add up to 1.0.</param>
public WeightedDie(IRandomizable rnd, params double[] weights) : base(rnd, weights.Length)
{
decimal total = 0M;
decimal[] decWeights = new decimal[weights.Length];
for (int i = 0; i < weights.Length; i++)
{
decWeights[i] = Convert.ToDecimal(weights[i]);
}
var smallest = decWeights[0];
int[] normalizedWeights = new int[decWeights.Length];
foreach (var w in decWeights)
{
smallest = w < smallest ? w : smallest;
total += w;
}
if (total != 1.0M)
{
throw new NDiceException($"Weights must add up to 1.0. Current sum: {total}");
}
var multiplier = 1 / smallest;
for (int i = 0; i < decWeights.Length; i++)
{
normalizedWeights[i] = (int)(decWeights[i] * multiplier);
}
Weight = normalizedWeights;
}
/// <summary>Initializes a new weighted die with the specified number of sides. Default is six.</summary>
/// <param name="rnd"><c>Random</c> object to be used when rolling the die.</param>
/// <param name="sides">Number of sides on the die.</param>
public WeightedDie(IRandomizable rnd, int sides = 6) : base(rnd, sides)
{
Weight = new int[Sides];
for (int i = 0; i < Sides; i++)
{
Weight[i] = 1;
}
}
public void RollInRange(IRandomizable rnd)
{
var die = new Die(rnd, 10);
for (int i = 0; i < 50; i++)
{
Assert.InRange(die.Roll(), 0, 10);
}
}
/// <summary>
/// This allows overrideable behavior that can replace or extend the basic behavior,
/// which is to call Randomize on any public properties that are listed as randomizeable.
/// This does nothing to normal properties or non public members and needs to be overriden
/// to provide the special case functionality for sub-classes.
/// </summary>
/// <param name="generator">The random number generator to be used during randomization.</param>
protected virtual void OnRandomize(Random generator)
{
Type original = GetType();
PropertyInfo[] originalProperties = original.GetProperties(BindingFlags.Public | BindingFlags.Instance);
foreach (PropertyInfo originalProperty in originalProperties)
{
object prop = originalProperty.GetValue(this, null);
IRandomizable rnd = prop as IRandomizable;
rnd?.Randomize(generator);
}
}
/// <summary>Initializes a new weighted die with known weights.</summary> /// <param name="rnd"><c>Random</c> object to be used when rolling the die.</param> /// <param name="weights">Pre-calculated weights of the sides of the die.</param> public WeightedDie(IRandomizable rnd, params int[] weights) : base(rnd, weights.Length) => Weight = weights;
/// <summary>Initializes a new fair die with the specified number of sides. Default is six.</summary>
/// <param name="rnd"><c>Random</c> object to be used when rolling the die.</param>
/// <param name="sides">Number of sides on the die.</param>
public Die(IRandomizable rnd, int sides = 6)
{
_rnd = rnd;
Sides = sides;
}
/// <summary>Initializes a new gambler's die with known weights. Number of sides is the <c>Length</c> of the weights.</summary>
/// <param name="rnd"><c>Random</c> object to be used when rolling the die.</param>
/// <param name="weights">Pre-calculated weights of the sides of the die. Total of weights must add up to 1.0.</param>
public GamblersDie(IRandomizable rnd, params double[] weights) : base(rnd, weights)
{
}
/// <summary>Initializes a new gambler's die with the specified number of sides. Default is six.</summary>
/// <param name="rnd"><c>Random</c> object to be used when rolling the die.</param>
/// <param name="sides">Number of sides on the die.</param>
public GamblersDie(IRandomizable rnd, int sides = 6) : base(rnd, sides)
{
}
/// <summary>Initializes a new tapper's die with known weights. Number of sides is the <c>Length</c> of the weights.</summary>
/// <param name="rnd"><c>Random</c> object to be used when rolling the die.</param>
/// <param name="weights">Pre-calculated weights of the sides of the die. Total of weights must add up to 1.0.</param>
public TappersDie(IRandomizable rnd, params double[] weights) : this(rnd, false, weights)
{
}
/// <summary>Initializes a new tapper's die with known weights. Number of sides is the <c>Length</c> of the weights.</summary>
/// <param name="rnd"><c>Random</c> object to be used when rolling the die.</param>
/// <param name="tapped">Whether the die is tapped (weighted) or not (unweighted). Default is false.</param>
/// <param name="weights">Pre-calculated weights of the sides of the die. Total of weights must add up to 1.0.</param>
public TappersDie(IRandomizable rnd, bool tapped, params double[] weights) : base(rnd, weights)
{
Tapped = tapped;
_die = new Die(_rnd, weights.Length);
}
/// <summary>Initializes a new tapper's die with the specified number of sides. Default is six.</summary>
/// <param name="rnd"><c>Random</c> object to be used when rolling the die.</param>
/// <param name="tapped">Whether the die is tapped (weighted) or not (unweighted). Default is false.</param>
/// <param name="sides">Size of the die. Default is six.</param>
public TappersDie(IRandomizable rnd, bool tapped, int sides = 6) : base(rnd, sides)
{
Tapped = tapped;
_die = new Die(_rnd, sides);
}
/// <summary>Initializes a new tapper's die with the specified number of sides. Default is six.</summary>
/// <param name="rnd"><c>Random</c> object to be used when rolling the die.</param>
public TappersDie(IRandomizable rnd) : base(rnd)
{
Tapped = false;
_die = new Die(_rnd, 6);
}
/// <summary>Initializes a new tapper's die with the specified number of sides.</summary>
/// <param name="rnd"><c>Random</c> object to be used when rolling the die.</param>
/// <param name="sides">Size of the die.</param>
public TappersDie(IRandomizable rnd, int sides) : this(rnd, false, sides)
{
}
