/**
* Distribute nourishment in the universe.
*
* @param universe The universe.
*/
private void DistributeNourishment(PlantUniverse universe)
{
double rootCount = 0;
double surfaceCount = 0;
// Distribute sun energy downward
var waterTable = new double[PlantUniverse.UniverseWidth];
for (int i = 0; i < waterTable.Length; i++)
{
waterTable[i] = 1.0;
}
for (int row = PlantUniverse.UniverseHeight - 1; row >= 0; row--)
{
for (int col = 0; col < PlantUniverse.UniverseWidth; col++)
{
double decay;
// no water above ground
decay = row < PlantUniverse.GroundLine ? 0 : 1;
PlantUniverseCell cell = universe.GetCell(row, col);
cell.CalculatedWater = waterTable[col];
// Collect resources for live cells
if (cell.IsAlive)
{
// Live cells cause the water to decay (roots collect)
decay *= PlantUniverse.Decay;
// Set the energy based on sunlight level and composition of the live cell
double myWater = cell.CalculatedWater * cell.Leafyness;
double transWater = universe.CalculateTransferNourishment(row, col) * (1.0 - cell.Leafyness);
double n = Math.Max(myWater, transWater);
n = Math.Max(PlantUniverse.MinLivingEnergy, n);
cell.Nourishment = n;
// update the root and surface counts
if (row >= PlantUniverse.GroundLine)
{
rootCount += cell.Nourishment;
}
else
{
surfaceCount += cell.Leafyness;
}
}
waterTable[col] *= decay;
}
}
universe.RootCount = rootCount;
universe.SurfaceCount = surfaceCount;
}
/// <inheritdoc />
public double CalculateScore(IMLMethod algo)
{
var genome = (DoubleArrayGenome)algo;
var universe = new PlantUniverse();
universe.Reset();
var physics = new PlantPhysics();
var growth = new PlantGrowth();
// Run the generations.
for (int i = 0; i < PlantUniverse.EvaluationCycles; i++)
{
physics.RunPhysics(universe);
growth.RunGrowth(universe, genome.Data);
}
// Count the amount of green.
int count = 0;
double sum = 0;
for (int row = 0; row < PlantUniverse.UniverseHeight; row++)
{
for (int col = 0; col < PlantUniverse.UniverseWidth; col++)
{
PlantUniverseCell cell = universe.GetCell(row, col);
if (cell.IsAlive)
{
if (row >= PlantUniverse.GroundLine)
{
sum += 0.5;
}
else
{
sum += cell.Leafyness;
}
}
count++;
}
}
return(sum / count);
}
/**
* Distribute the sunlight energy in the universe.
*
* @param universe The universe.
*/
private void DistributeEnergy(PlantUniverse universe)
{
// Distribute sun energy downward
var sunlight = new double[PlantUniverse.UniverseWidth];
for (int i = 0; i < sunlight.Length; i++)
{
sunlight[i] = 1.0;
}
for (int row = 0; row < PlantUniverse.UniverseHeight; row++)
{
for (int col = 0; col < PlantUniverse.UniverseWidth; col++)
{
// no sun underground
double decay = row >= PlantUniverse.GroundLine ? 0 : 1;
PlantUniverseCell cell = universe.GetCell(row, col);
cell.CalculatedSunlight = sunlight[col];
// Collect resources for live cells
if (cell.IsAlive)
{
// Live cells cause the sunlight to decay (shade)
decay *= PlantUniverse.Decay * cell.Leafyness;
// Set the energy based on sunlight level and composition of the live cell
double myEnergy = cell.CalculatedSunlight * cell.Leafyness;
double transEnergy = universe.CalculateTransferEnergy(row, col) * (1.0 - cell.Leafyness);
double e = Math.Max(myEnergy, transEnergy);
e = Math.Max(PlantUniverse.MinLivingEnergy, e);
cell.Energy = e;
}
sunlight[col] *= decay;
}
}
}
/// <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;
}
}
}
}