private static Point FindEmptySquare(IGridView <bool> map, IEnhancedRandom rng)
{
// Try random positions first
// TODO: Port to retries option
for (var i = 0; i < 100; i++)
{
var location = rng.RandomPosition(map, false);
if (IsPointConsideredEmpty(map, location))
{
return(location);
}
}
// Start looping through every single one
for (var i = 0; i < map.Width * map.Height; i++)
{
var location = Point.FromIndex(i, map.Width);
if (IsPointConsideredEmpty(map, location))
{
return(location);
}
}
return(Point.None);
}
/// <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>
/// Performs a percentage check that has the specified chance to succeed. The percentage should be in range
/// [0, 100] (inclusive).
/// </summary>
/// <param name="rng" />
/// <param name="percentage">Percentage chance (out of 100) that this check will succeed. Must be in range [0, 100].</param>
/// <returns></returns>
public static bool PercentageCheck(this IEnhancedRandom rng, float percentage)
{
if (percentage > 100 || percentage < 0)
{
throw new ArgumentException($"Percentage given to {nameof(PercentageCheck)} must be in range [0, 100].",
nameof(percentage));
}
return(rng.NextBool(percentage * 0.01f));
}
/// <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());
}
private static int GetDirectionIndex(bool[] validDirections, IEnhancedRandom rng)
{
// 10 tries to find random ok valid
var randomSuccess = false;
var tempDirectionIndex = 0;
for (var randomCounter = 0; randomCounter < 10; randomCounter++)
{
tempDirectionIndex = rng.NextInt(4);
if (!validDirections[tempDirectionIndex])
{
continue;
}
randomSuccess = true;
break;
}
if (randomSuccess)
{
return(tempDirectionIndex);
}
// Couldn't find an active valid, so just run through each one
if (validDirections[0])
{
tempDirectionIndex = 0;
}
else if (validDirections[1])
{
tempDirectionIndex = 1;
}
else if (validDirections[2])
{
tempDirectionIndex = 2;
}
else
{
tempDirectionIndex = 3;
}
return(tempDirectionIndex);
}
/// <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));
