public void PerformCrossover(ref IGenoType genoTypeLeft, ref IGenoType genoTypeRight)
{
if ((new PhenoTypeTree(genoTypeLeft.GenoTypeNodes)).ToString().Equals((new PhenoTypeTree(genoTypeRight.GenoTypeNodes)).ToString()))
{
return;
}
// var left1 = new PhenoTypeTree(genoTypeLeft.GenoTypeNodes).ToString();
// var right1 = new PhenoTypeTree(genoTypeRight.GenoTypeNodes).ToString();
if (!(UniformRandomGenerator.GetContinousRandomNumber(0, 1.0) <= EaGeneExpressionParameters.CrossoverProbability))
{
return;
}
if (UniformRandomGenerator.GetContinousRandomNumber(0, 1.0) < 0.5)
{
var numberOfNodes = PhenoTypeTree.GetNumberOfNodes(genoTypeLeft.GenoTypeNodes);
var crossOverPosition1 = UniformRandomGenerator.GetIntegerRandomNumber(0, numberOfNodes - 1);
if (UniformRandomGenerator.GetContinousRandomNumber(0, 1.0) < 0.1)
{
for (var index = crossOverPosition1; index < genoTypeLeft.GenoTypeNodes.Count; index++)
{
Swap(genoTypeLeft.GenoTypeNodes, genoTypeRight.GenoTypeNodes, index);
}
}
else
{
for (var index = 0; index <= crossOverPosition1; index++)
{
Swap(genoTypeLeft.GenoTypeNodes, genoTypeRight.GenoTypeNodes, index);
}
}
}
else
{
var crossOverPosition1 = UniformRandomGenerator.GetIntegerRandomNumber(1, genoTypeLeft.GenoTypeNodes.Count - 2);
var crossOverPosition2 = UniformRandomGenerator.GetIntegerRandomNumber(crossOverPosition1, genoTypeLeft.GenoTypeNodes.Count - 2);
for (var index = crossOverPosition1; index < crossOverPosition2; index++)
{
Swap(genoTypeLeft.GenoTypeNodes, genoTypeRight.GenoTypeNodes, index);
}
}
// var left2 = new PhenoTypeTree(genoTypeLeft.GenoTypeNodes).ToString();
// var right2 = new PhenoTypeTree(genoTypeRight.GenoTypeNodes).ToString();
}
public void PerformMutation(ref IGenoType genoType)
{
if (!(UniformRandomGenerator.GetContinousRandomNumber(0, 1.0) <= EaGeneExpressionParameters.MutationProbability))
{
return;
}
var randomNumber = UniformRandomGenerator.GetContinousRandomNumber(0, 1.0);
if (randomNumber <= 0.3)
{
genoType = GenoTypeFactory.GetGenoType();
}
else
{
//var index = UniformRandomGenerator.GetIntegerRandomNumber(0, genoType.GenoTypeNodes.Count - 1);
var numberOfNodes = PhenoTypeTree.GetNumberOfNodes(genoType.GenoTypeNodes);
var index = UniformRandomGenerator.GetIntegerRandomNumber(0, numberOfNodes - 1);
if (randomNumber <= 0.6)
{
var node = genoType.GenoTypeNodes[index];
genoType.GenoTypeNodes.RemoveAt(index);
index = UniformRandomGenerator.GetIntegerRandomNumber(0, genoType.GenoTypeNodes.Count - 1);
genoType.GenoTypeNodes.Insert(index, node);
}
else
{
if (genoType.GenoTypeNodes[index].GetType() == typeof(ParameterTerminal))
{
((ParameterTerminal)genoType.GenoTypeNodes[index]).Value =
((ParameterTerminal)genoType.GenoTypeNodes[index]).Value +
UniformRandomGenerator.GetContinousRandomNumber(-3.0, 3.0);
}
else
{
if (index < EaGeneExpressionParameters.MaximumNumberOfHeadNodes)
{
genoType.GenoTypeNodes[index] = GenoTypeFactory.GetFunctionOrTerminalNode();
}
else
{
genoType.GenoTypeNodes[index] = GenoTypeFactory.GetTerminalNode();
}
}
}
}
}
public Individual(IGenoType genoType)
{
Guid = Guid.NewGuid();
GenoType = genoType;
}