public void Mutate(float mutationRate)
{
for (var rowIndex = 0; rowIndex < rowCount; rowIndex++)
{
for (var columnIndex = 0; columnIndex < columnCount; columnIndex++)
{
var rand = SyncRandom.NextFloat();
if (rand < mutationRate)
{
// Debug.WriteLine(string.Format("mutated {0}:{1}", rowIndex, columnIndex));
matrix[rowIndex, columnIndex] += SyncRandom.NextGaussian() / 5;
if (matrix[rowIndex, columnIndex] > 1)
{
matrix[rowIndex, columnIndex] = 1;
}
else if (matrix[rowIndex, columnIndex] < -1)
{
matrix[rowIndex, columnIndex] = -1;
}
}
}
}
}
public void Randomize()
{
for (var rowIndex = 0; rowIndex < rowCount; rowIndex++)
{
for (var columnIndex = 0; columnIndex < columnCount; columnIndex++)
{
matrix[rowIndex, columnIndex] = SyncRandom.NextFloat(-1, 1);
}
}
}
public Matrix Crossover(Matrix partner)
{
var child = new Matrix(rowCount, columnCount);
var randomRow = SyncRandom.NextInt(0, rowCount);
var randomColumn = SyncRandom.NextInt(0, columnCount);
for (var rowIndex = 0; rowIndex < rowCount; rowIndex++)
{
for (var columnIndex = 0; columnIndex < columnCount; columnIndex++)
{
child.matrix[rowIndex, columnIndex] = (rowIndex < randomRow) || (rowIndex == randomRow && columnIndex <= randomColumn) ?
matrix[rowIndex, columnIndex] :
partner.matrix[rowIndex, columnIndex];
}
}
return(child);
}
private Runner GetRandomRunner(Runner[] fromRunners) => fromRunners[SyncRandom.NextInt(0, fromRunners.Length)].Clone();
