/// <summary>
/// Calculate the growth potential for a candidate cell. Evaluates the distance between the candidate cell's info
/// vector and the two growth vectors in the genome. The minimum of these two vectors will be returned if
/// it is below a specified minimum threshold.
/// </summary>
/// <param name="universe">The universe to evaluate.</param>
/// <param name="row">The row to evaluate.</param>
/// <param name="col">The column to evaluate.</param>
/// <param name="genome">The genome.</param>
/// <returns>The minimum distance.</returns>
private double GetGrowthPotential(PlantUniverse universe, int row, int col, double[] genome)
{
double[] cellVec = universe.GetCellInfoVector(row, col);
double d1 = _dist.Calculate(cellVec, 0, genome, PlantUniverse.CellVectorLength * 2,
PlantUniverse.CellVectorLength);
double d2 = _dist.Calculate(cellVec, 0, genome, PlantUniverse.CellVectorLength * 3,
PlantUniverse.CellVectorLength);
double result = Math.Min(d1, d2);
if (result > PlantUniverse.MinGrowthDist)
{
result = -1;
}
return(result);
}
/// <summary>
/// Run a growth cycle for the universe.
/// </summary>
/// <param name="universe">The universe.</param>
/// <param name="genome">The genome.</param>
public void RunGrowth(PlantUniverse universe, double[] genome)
{
// Does this plant have enough roots to grow?
if (universe.SurfaceCount < AIFH.DefaultPrecision)
{
return;
}
// The amount of leafy material per root nourishment. A higher number indicates
// more root nourishment than leafs.
double rootRatio = universe.RootCount / universe.SurfaceCount;
bool allowRoot = rootRatio < 0.5; //rootRatio < 0.1;
bool allowSurface = rootRatio > 0.5;
// Reset the new composition to be the composition of the current universe
for (int row = 0; row < PlantUniverse.UniverseHeight; row++)
{
for (int col = 0; col < PlantUniverse.UniverseWidth; col++)
{
_newComposition[row][col] = false;
}
}
for (int row = 0; row < PlantUniverse.UniverseHeight; row++)
{
for (int col = 0; col < PlantUniverse.UniverseWidth; col++)
{
PlantUniverseCell cell = universe.GetCell(row, col);
// see if we want to change the composition
if (row < PlantUniverse.GroundLine)
{
double[] cellVec = universe.GetCellInfoVector(row, col);
double d1 = _dist.Calculate(cellVec, 0, genome, 0, PlantUniverse.CellVectorLength);
double d2 = _dist.Calculate(cellVec, 0, genome, PlantUniverse.CellVectorLength,
PlantUniverse.CellVectorLength);
if (d1 < d2)
{
cell.Leafyness = (cell.Leafyness * PlantUniverse.StemTransition);
}
}
// Evaluate growth into each neighbor cell
if (universe.CanGrow(row, col))
{
EvaluateNeighbors(universe, row, col, genome, allowRoot, allowSurface);
}
}
}
// Copy the new composition back to the universe
for (int row = 0; row < PlantUniverse.UniverseHeight; row++)
{
for (int col = 0; col < PlantUniverse.UniverseWidth; col++)
{
PlantUniverseCell cell = universe.GetCell(row, col);
if (_newComposition[row][col])
{
cell.Leafyness = row >= PlantUniverse.GroundLine ? 0 : 1.0;
cell.Energy = 1.0;
cell.Nourishment = 1.0;
}
}
}
}