//TODO add mutation rates and min/max move values
public void Mutate(EvoDrawing parent)
{
if (Numbers.ProbabilityFulfilled(Numbers.PointMoveMutationProbability))
{
X = Math.Min(
Math.Max(
0, X + Numbers.GetRandom(-Numbers.FirstRange, Numbers.FirstRange)), Numbers.MaxWidth);
Y = Math.Min(
Math.Max
(0, Y + Numbers.GetRandom(-Numbers.FirstRange, Numbers.FirstRange)), Numbers.MaxHeight);
parent.NeedRepaint = true;
}
if (Numbers.ProbabilityFulfilled(Numbers.PointMoveMutationProbability))
{
X = Math.Min(
Math.Max(
0, X + Numbers.GetRandom(-Numbers.SecondRange, Numbers.SecondRange)), Numbers.MaxWidth);
Y = Math.Min(
Math.Max
(0, Y + Numbers.GetRandom(-Numbers.SecondRange, Numbers.SecondRange)), Numbers.MaxHeight);
parent.NeedRepaint = true;
}
if (Numbers.ProbabilityFulfilled(Numbers.PointMoveMutationProbability))
{
X = Numbers.GetRandom(1, Numbers.MaxWidth);
Y = Numbers.GetRandom(1, Numbers.MaxHeight);
parent.NeedRepaint = true;
}
}
//Mutating shape by changing number of points or changing their position
//TODO change mutation rates to variables
public void Mutate(EvoDrawing parent)
{
foreach (var point in shapePoints)
{
point.Mutate(parent);
}
//Add point to shape
if (shapePoints.Count < MaxPoints && Numbers.ProbabilityFulfilled(Numbers.AddPointMutationProbability))
{
parent.NeedRepaint = true;
EvoPoint additionalPoint = new EvoPoint();
int i = Numbers.GetRandom(1, shapePoints.Count - 1);
additionalPoint.X = Numbers.GetAverage(shapePoints[i - 1].X, shapePoints[i].X);
additionalPoint.Y = Numbers.GetAverage(shapePoints[i - 1].Y, shapePoints[i].Y);
shapePoints.Insert(i, additionalPoint);
}
//Delete point
if (shapePoints.Count > MinPoints && Numbers.ProbabilityFulfilled(Numbers.RemovePointmutationProbability))
{
parent.NeedRepaint = true;
shapePoints.Remove(
shapePoints.ElementAt <EvoPoint>(
Numbers.GetRandom(0, shapePoints.Count)));
}
color.Mutate(parent);
}
//Mutation of a color
//TODO add variables of mutation probability
public void Mutate(EvoDrawing parent)
{
//Red mutation
if (Numbers.ProbabilityFulfilled(Numbers.ColorMutationProbability))
{
red = Numbers.GetRandom(0, 255);
parent.NeedRepaint = true;
}
//Green mutation
if (Numbers.ProbabilityFulfilled(Numbers.ColorMutationProbability))
{
green = Numbers.GetRandom(0, 255);
parent.NeedRepaint = true;
}
//Blue mutation
if (Numbers.ProbabilityFulfilled(Numbers.ColorMutationProbability))
{
blue = Numbers.GetRandom(0, 255);
parent.NeedRepaint = true;
}
//Alpha mutation
if (Numbers.ProbabilityFulfilled(Numbers.ColorMutationProbability))
{
alpha = Numbers.GetRandom(Numbers.MinAlfa, Numbers.MaxAlfa);
parent.NeedRepaint = true;
}
}
public static float Fitness(EvoDrawing drawing, float[] image)
{
float fitness = 0;
var bytesDrawing = BitmapConverter.getFloats(drawing.ToColors());
for (int i = 0; i < bytesDrawing.Count(); i++)
{
fitness += (bytesDrawing[i] - image[i]) * (bytesDrawing[i] - image[i]);
}
return(fitness);
}
public static List <EvoDrawing> Crossover(int numberOfChildren, EvoDrawing firstParent, EvoDrawing secondParent)
{
var drawings = new List <EvoDrawing>();
for (int i = 0; i < numberOfChildren; i++)
{
if (Numbers.ProbabilityFulfilled(Numbers.CrossoverProbability))
{
drawings.Add(firstParent.Crossover(secondParent));
}
else
{
drawings.Add(firstParent.Clone());
}
}
return(drawings);
}
public EvoDrawing Crossover(EvoDrawing mate)
{
List <EvoShape> shapeList = new List <EvoShape>();
var mainEnumerator = shapes.GetEnumerator();
var mateEnumerator = mate.shapes.GetEnumerator();
while (mainEnumerator.MoveNext() != false && mateEnumerator.MoveNext() != false)
{
if (Numbers.ProbabilityFulfilled(Numbers.UniformCrossoverRatio))
{
shapeList.Add(mainEnumerator.Current.Clone());
}
else
{
shapeList.Add(mateEnumerator.Current.Clone());
}
}
return(new EvoDrawing(shapeList, shape, MinShapePoints, MaxShapePoints, float.MaxValue));
}
