/// <summary>
/// Return an info vector about a cell. This allows cells to be identified by instructions in the genome.
/// The vector contains four doubles. All doubles range from [0,1].
/// Element 0: The height of the cell. 1.0 for the last row and 0.0 for the first row.
/// Element 1: The amount of sunlight (for surface cells) or water (for underground cells) exposure for this cell.
/// Element 2: Crowding by neighbors.
/// Element 3: Nourishment for this cell.
/// </summary>
/// <param name="row">The row.</param>
/// <param name="col">The column.</param>
/// <returns>The info vector.</returns>
public double[] GetCellInfoVector(int row, int col)
{
var result = new double[CellVectorLength];
PlantUniverseCell cell = GetCell(row, col);
// Height
result[0] = row / UniverseHeight;
// Sunlight
if (row < GroundLine)
{
result[1] = cell.CalculatedSunlight;
}
else
{
result[1] = cell.CalculatedWater;
}
// Crowd
result[2] = CalculateMeanNeighborsCrowd(row, col);
// Nourishment
result[3] = cell.Nourishment;
//
return(result);
}
/// <summary>
/// Paint the plant.
/// </summary>
/// <returns></returns>
public void Paint()
{
// Loop over all cells.
for (int row = 0; row < PlantUniverse.UniverseHeight; row++)
{
for (int col = 0; col < PlantUniverse.UniverseWidth; col++)
{
PlantUniverseCell cell = Universe.GetCell(row, col);
Brush brush;
// For empty cells display either the ground or sky color.
// Roots are always white.
if (row >= PlantUniverse.GroundLine)
{
brush = cell.IsAlive ? Brushes.White : _dirtColor;
}
else
{
if (cell.IsAlive)
{
var idx = (int)((_gradient.Length - 1) * cell.Leafyness);
brush = _gradient[idx];
}
else
{
brush = _skyColor;
}
}
_grid[row][col].Fill = brush;
}
}
}
/// <summary>
/// Construct the universe and create the grid.
/// </summary>
public PlantUniverse()
{
_grid = new PlantUniverseCell[UniverseHeight][];
for (int row = 0; row < _grid.Length; row++)
{
_grid[row] = new PlantUniverseCell[UniverseWidth];
for (int col = 0; col < _grid[row].Length; col++)
{
_grid[row][col] = new PlantUniverseCell();
}
}
}
/// <summary>
/// Returns true, if the specified cell can grow.
/// </summary>
/// <param name="row">The row.</param>
/// <param name="col">The column.</param>
/// <returns>True, if the specified cell is allowed to grow.</returns>
public bool CanGrow(int row, int col)
{
PlantUniverseCell cell = GetCell(row, col);
if (cell.IsAlive)
{
if (row >= GroundLine)
{
return(CountNeighbors(row, col) < 4);
}
return(cell.Energy > GrowthThreshold && cell.Nourishment > GrowthThreshold);
}
return(false);
}
/// <summary>
/// Calculate the degree of crowding in a cell. Leafy cells
/// produce more crowding than stem.
/// </summary>
/// <param name="row">The row.</param>
/// <param name="col">The column.</param>
/// <returns>The crowd imposed by this cell.</returns>
public double CalculateCrowd(int row, int col)
{
if (!IsValid(row, col))
{
return(0);
}
PlantUniverseCell cell = GetCell(row, col);
if (!cell.IsAlive)
{
return(0);
}
return(cell.Leafyness);
}
/// <summary>
/// Construct the universe and create the grid.
/// </summary>
public PlantUniverse()
{
_grid = new PlantUniverseCell[UniverseHeight][];
for (int row = 0; row < _grid.Length; row++)
{
_grid[row] = new PlantUniverseCell[UniverseWidth];
for (int col = 0; col < _grid[row].Length; col++)
{
_grid[row][col] = new PlantUniverseCell();
}
}
}