/// <summary>
/// Rolls the dice, returning the sum.
/// </summary>
/// <param name="rng">The RNG to use for rolling,</param>
/// <returns>The sum of the roll.</returns>
public int GetResult(IEnhancedRandom rng)
{
_diceResults.Clear();
var sum = 0;
LastMultiplicity = Multiplicity.GetResult(rng);
LastSidedness = Sides.GetResult(rng);
if (LastMultiplicity < 0)
{
throw new InvalidMultiplicityException();
}
if (LastSidedness <= 0)
{
throw new ImpossibleDieException();
}
for (var i = 0; i < LastMultiplicity; i++)
{
var diceVal = rng.NextInt(1, LastSidedness + 1);
sum += diceVal;
_diceResults.Add(diceVal);
}
return(sum);
}
/// <summary>
/// Rolls the expression using the RNG given, returning the result.
/// </summary>
/// <param name="rng">The RNG to use. If null is specified, the default RNG is used.</param>
/// <returns>The result obtained by rolling the dice expression.</returns>
public int Roll(IGenerator rng = null)
{
if (rng == null)
{
rng = SingletonRandom.DefaultRNG;
}
return(termToEvaluate.GetResult(rng));
}
/// <summary>
/// Rolls the expression using the RNG given, returning the result.
/// </summary>
/// <param name="rng">The RNG to use. If null is specified, the default RNG is used.</param>
/// <returns>The result obtained by rolling the dice expression.</returns>
public int Roll(IRandom rng = null)
{
if (rng == null)
{
rng = SingletonRandom.Instance;
}
return(termToEvaluate.GetResult(rng));
}
/// <summary>
/// Evaluates the term (as well as the dice expression), returning the sum of the highest n
/// rolls in the dice term.
/// </summary>
/// <param name="rng">The rng to use -- passed to the dice term being operated on.</param>
/// <returns>
/// The sum of the highest n rolls of the dice term being operated on, where n is equal to
/// the value of the keep variable taken in the constructor.
/// </returns>
public int GetResult(IGenerator rng)
{
int keepVal = keep.GetResult(rng);
if (keepVal < 0)
{
throw new Exceptions.InvalidChooseException();
}
diceTerm.GetResult(rng); // Roll so we can check chooses
if (keepVal > diceTerm.LastMultiplicity)
{
throw new Exceptions.InvalidChooseException();
}
return(diceTerm.DiceResults.OrderByDescending(value => value).Take(keepVal).Sum());
}
/// <summary>
/// Evaluates the term (as well as the dice expression), returning the sum of the highest n
/// rolls in the dice term.
/// </summary>
/// <param name="rng">The rng to use -- passed to the dice term being operated on.</param>
/// <returns>
/// The sum of the highest n rolls of the dice term being operated on, where n is equal to
/// the value of the keep variable taken in the constructor.
/// </returns>
public int GetResult(IEnhancedRandom rng)
{
var keepVal = Keep.GetResult(rng);
if (keepVal < 0)
{
throw new InvalidChooseException();
}
DiceTerm.GetResult(rng); // Roll so we can check chooses
if (keepVal > DiceTerm.LastMultiplicity)
{
throw new InvalidChooseException();
}
return(DiceTerm.DiceResults.OrderByDescending(value => value).Take(keepVal).Sum());
}
/// <summary> /// Adds its two terms together, evaluating those two terms as necessary. /// </summary> /// <param name="rng">The rng to use, passed to other terms.</param> /// <returns>The result of adding <see cref="Term1" /> and <see cref="Term2" />.</returns> public int GetResult(IEnhancedRandom rng) => Term1.GetResult(rng) + Term2.GetResult(rng);
/// <summary> /// Divides the first term by the second, evaluating those two terms as necessary. /// </summary> /// <param name="rng">The rng to used -- passed to other terms.</param> /// <returns>The result of evaluating <see cref="Term1" /> / <see cref="Term2" />.</returns> public int GetResult(IEnhancedRandom rng) => (int)Math.Round((double)Term1.GetResult(rng) / Term2.GetResult(rng));
