public void AddTokensFromPile(TokenPile tokenPile)
{
foreach (int key in tokenPile._tokenCounts.Keys)
{
AddTokens(key, tokenPile[key]);
}
}
/// <summary>
/// Advance a population to another generation by applying a generation rule.
/// </summary>
/// <param name="population">The input population.</param>
/// <param name="rule">The generation rule.</param>
/// <param name="nhbdSize">The size of the neighborhood.</param>
/// <param name="popIndex"> </param>
/// <returns>The result of applying the generation rule to the input population.</returns>
public Population AdvancePopulation(Population population, ulong rule, int nhbdSize, int popIndex)
{
Contract.Requires(population != null);
Contract.Requires(rule >= 0);
Contract.Requires(nhbdSize > 0);
Population retPop = new Population(population.Size);
// The index into the population to select the cells around the current cell by the nhbd size.
int indexMag = (int)Math.Floor((double)nhbdSize / 2);
// Iterate through every cell in the population, and for each one determine if the new cell at
// that index in the new population will be alive or dead.
for (int i = 0; i < retPop.Size; i++)
{
int ruleIndex = 0;
TokenPile contributingTokens = new TokenPile();
// Iterate through the cells around the current cell, dependant on the nhbd size.
for (int n = -indexMag+i; n <= indexMag+i; n++)
{
// If the cell is alive (and thus should contribute), then add the power of two of the current
// index to the rule index.
if (population[n].Value == 0) continue;
ruleIndex += (int)Math.Pow(2, n + indexMag - i);
if (UseTokens)
{
contributingTokens.AddTokensFromPile(population[n].Tokens);
}
}
// Index into the rule by all of the cells that contributed to this new cell.
int cellValue = (rule & (1UL << ruleIndex)) > 0 ? 1 : 0;
// Make the new cell, carrying over the tokens of those cells that contributed.
Cell newCell = new Cell(cellValue) {Tokens = contributingTokens.Normalize()};
// Add the cell to the return population.
retPop.Cells.Add(newCell);
}
return retPop;
}
public Cell(int value)
{
Value = value;
Tokens = new TokenPile();
}