/// <summary>
/// This version of substracts poly performs just a 'from time to time' substract;
/// </summary>
/// <param name="gene"></param>
private void performSubstract(Gene gene)
{
if (gene.Polygons.Count < this.NrOfPolygons / 2 + 1)
{
return;
}
int doIt = random.Next(100);
if (doIt % 2 == 0)
{
return;
}
double referenceNegativeFitness = double.MaxValue;
SubstractPolygonMutationChanges bigChange = null;
for (int i = 0; i < gene.Polygons.Count; i++)
{
double oldNegativeFitness = gene.NegativeFitness;
SubstractPolygonMutationChanges changes = gene.RemovePolygonAtPosition(i);
if (changes != null && gene.NegativeFitness < referenceNegativeFitness)
{
bigChange = changes;
referenceNegativeFitness = gene.NegativeFitness;
}
gene.RestoreMutation(changes, oldNegativeFitness);
}
gene.ApplyMutation(bigChange);
}
private void performAddPolygon(Gene gene)
{
if (gene.Polygons.Count >= this.NrOfPolygons)
{
return;
}
double oldNegativeFitness = gene.NegativeFitness;
AddPolygonMutationChanges bigChange = null;
for (int i = 0; i < NrOfMutationsTries; i++)
{
AddPolygonMutationChanges changes = gene.AddPolygon();
if (changes != null && gene.NegativeFitness > oldNegativeFitness)
{
gene.RestoreMutation(changes, oldNegativeFitness);
}
else if (changes != null)
{
oldNegativeFitness = gene.NegativeFitness;
bigChange = changes;
gene.RestoreMutation(changes, changes.OldNegativeFitness);
}
}
gene.ApplyMutation(bigChange);
}
private void performMutateColorParam(Gene gene)
{
double oldNegativeFitness = gene.NegativeFitness;
ColorMutationChanges bigChange = null;
for (int i = 0; i < NrOfMutationsTries; i++)
{
ColorMutationChanges changes = gene.MutateColorParam();
if (changes != null && gene.NegativeFitness > oldNegativeFitness)
{
gene.RestoreMutation(changes, oldNegativeFitness);
}
else if (changes != null)
{
oldNegativeFitness = gene.NegativeFitness;
bigChange = changes;
gene.RestoreMutation(changes, changes.OldNegativeFitness);
}
}
gene.ApplyMutation(bigChange);
}
