private int ComputeNewHormoneDensity(WorldCell previousGenWorldCell, ColonyCell cell)
{
var previousHormoneDensity = previousGenWorldCell.GetMoveHormoneDensity(cell.Colony);
// evaporate movement hormone from cell
double evaporated = (double)previousHormoneDensity * cell.Colony.HormoneEvaporationRatio;
// remove movement hormone that will be dissipated to neighboring cells
double dissipated = (double)previousHormoneDensity * cell.Colony.HormoneDissipationRatio;
// add movement hormone dissipated from neighboring cells of the same colony
double collected = 0.0;
foreach (var neighborCell in previousGenWorldCell._neighbors)
{
double neighborDissipation = neighborCell.GetMoveHormoneDensity(cell.Colony) * cell.Colony.HormoneDissipationRatio;
double collectedFromNeighbor = neighborDissipation / neighborCell._neighbors.Count;
collected += collectedFromNeighbor;
}
// add movement hormone deposited by moving cells
double depositedByLeaving = previousGenWorldCell.ComputeCreatureDensityMovementLoss(cell.Colony) * cell.Colony.HormoneLeavingCreatureDepositionRatio / cell.Colony.CreatureMoveRate;
double depositedByArriving = previousGenWorldCell.ComputeCreatureDensityMovementGain(cell.Colony) * cell.Colony.HormoneArrivingCreatureDepositionRatio / cell.Colony.CreatureMoveRate;
var newHormoneDensity = (int)(
previousHormoneDensity -
evaporated -
dissipated +
collected +
depositedByLeaving +
depositedByArriving);
return(Math.Max(0, newHormoneDensity));
}
/// <summary>
/// Convenience constructor for a hex-rectangle environment.
/// More complex, arbitrary patterns/shapes possible, but indexing by row and column still works because it's a (hex) grid.
/// When that happens, this becomes RectangularHexWorld, and appropriate methods become part of parent class.
/// </summary>
public HexWorld(int rows, int cols)
{
RowCount = rows;
ColCount = cols;
_currentCells = new WorldCell[rows, cols];
_nextCells = new WorldCell[rows, cols];
// initialize cell containers
ForEachPosition((row, col) =>
{
_currentCells[row, col] = new WorldCell(row, col);
_nextCells[row, col] = new WorldCell(row, col);
});
// add neighbors to each container
ForEachCell((current, next, coord) =>
{
IEnumerable <Coord> neighborPositions = ComputeNeighborPositions(coord.Row, coord.Col);
current.AddNeighbors(neighborPositions.Select((nbrPos) => GetCurrentCell(nbrPos)));
next.AddNeighbors(neighborPositions.Select((nbrPos) => GetNextCell(nbrPos)));
});
_colony = new List <Colony>();
}
public void MutateToNextGen(WorldCell previousGenWorldCell)
{
foreach (ColonyCell cell in _colonyCells.Values)
{
cell.MoveHormoneDensity = ComputeNewHormoneDensity(previousGenWorldCell, cell);
cell.CreatureDensity = ComputeNewCreatureDensity(previousGenWorldCell, cell);
}
}
private int ComputeNewCreatureDensity(WorldCell previousGenWorldCell, ColonyCell cell)
{
double previousCreatureDensity = previousGenWorldCell.GetCreatureDensity(cell.Colony);
// trans movement
double movementCreatureLoss = previousGenWorldCell.ComputeCreatureDensityMovementLoss(cell.Colony);
double movementCreatureGain = previousGenWorldCell.ComputeCreatureDensityMovementGain(cell.Colony);
// overpressure rebound movement
double reboundCreatureLoss = previousGenWorldCell.ComputeCreatureDensityReboundLoss(cell.Colony);
double reboundCreatureGain = previousGenWorldCell.ComputeCreatureDensityReboundGain(cell.Colony);
double creatureMultiplicationGain = previousGenWorldCell.ComputeCreatureDensityMultiplicationGain(cell.Colony);
var newCreatureDensity = (int)(
previousCreatureDensity -
movementCreatureLoss -
reboundCreatureLoss +
movementCreatureGain +
reboundCreatureGain +
creatureMultiplicationGain);
return(Math.Max(0, newCreatureDensity));
}
public void AddNeighbor(WorldCell neighbor)
{
_neighbors.Add(neighbor);
}