/// <summary>
/// Copy constructor.
/// </summary>
/// <param name="copyFrom"></param>
public ConnectionMutationParameterGroup(ConnectionMutationParameterGroup copyFrom)
{
ActivationProportion = copyFrom.ActivationProportion;
PerturbationType = copyFrom.PerturbationType;
SelectionType = copyFrom.SelectionType;
Proportion = copyFrom.Proportion;
Quantity = copyFrom.Quantity;
PerturbationFactor = copyFrom.PerturbationFactor;
Sigma = copyFrom.Sigma;
}
/// <summary>
/// Copy constructor.
/// </summary>
/// <param name="copyFrom"></param>
public ConnectionMutationParameterGroup(ConnectionMutationParameterGroup copyFrom)
{
ActivationProportion = copyFrom.ActivationProportion;
PerturbationType = copyFrom.PerturbationType;
SelectionType = copyFrom.SelectionType;
Proportion = copyFrom.Proportion;
Quantity = copyFrom.Quantity;
PerturbationFactor = copyFrom.PerturbationFactor;
Sigma = copyFrom.Sigma;
}
private void MutateConnectionWeight(ConnectionGene connectionGene, NeatParameters np, ConnectionMutationParameterGroup paramGroup)
{
switch(paramGroup.PerturbationType)
{
case ConnectionPerturbationType.JiggleEven:
{
connectionGene.Weight += (Utilities.NextDouble()*2-1.0) * paramGroup.PerturbationFactor;
// Cap the connection weight. Large connections weights reduce the effectiveness of the search.
connectionGene.Weight = Math.Max(connectionGene.Weight, -np.connectionWeightRange/2.0);
connectionGene.Weight = Math.Min(connectionGene.Weight, np.connectionWeightRange/2.0);
break;
}
case ConnectionPerturbationType.JiggleND:
{
connectionGene.Weight += RandLib.gennor(0, paramGroup.Sigma);
// Cap the connection weight. Large connections weights reduce the effectiveness of the search.
connectionGene.Weight = Math.Max(connectionGene.Weight, -np.connectionWeightRange/2.0);
connectionGene.Weight = Math.Min(connectionGene.Weight, np.connectionWeightRange/2.0);
break;
}
case ConnectionPerturbationType.Reset:
{
// TODO: Precalculate connectionWeightRange / 2.
connectionGene.Weight = (Utilities.NextDouble()*np.connectionWeightRange) - np.connectionWeightRange/2.0;
break;
}
default:
{
throw new Exception("Unexpected ConnectionPerturbationType");
}
}
}