//creates children from two parents
public override void Reproduction()
{
for (int i = 0; i < nPairs; i++)
{
//define a split point in the parent's data
int splitPoint = rand.Next(0, chromLength - 1);
//get the current pair's index
int p1Index = breedingPairs[i][0];
int p2Index = breedingPairs[i][1];
//get the current pair
GABeingColour p1 = chromosomes[p1Index];
GABeingColour p2 = chromosomes[p2Index];
//generate two new children
Color[] child1Data = new Color[chromLength];
Color[] child2Data = new Color[chromLength];
//crossover
for (int digit = 0; digit < chromLength; digit++)
{
if (digit < splitPoint)
{
child1Data[digit] = p1.Data[digit];
child2Data[digit] = p2.Data[digit];
}
else
{
child1Data[digit] = p2.Data[digit];
child2Data[digit] = p1.Data[digit];
}
}
GABeingColour child1 = new GABeingColour(child1Data, target);
GABeingColour child2 = new GABeingColour(child2Data, target);
//overwrite low ranking chromosomes
int nextIndex = nKeep + i * 2;
if (nextIndex < population - 1) //stop index exceptions when prKeep is over 0.5
{
chromosomes[nextIndex] = child1;
chromosomes[nextIndex + 1] = child2;
}
}
}
//end constructors
//generated a random population of coloured chromosomes
public override void GenerateRandomBeings()
{
//make a new being for everyone in the population
for (int pop = 0; pop < population; pop++)
{
//new data for the new being
Color[] newData = new Color[chromLength];
//generate new being's colour
for (int digit = 0; digit < chromLength; digit++)
{
int r = rand.Next(Constants.MAX_COLOUR_VAL + 1);
int b = rand.Next(Constants.MAX_COLOUR_VAL + 1);
int g = rand.Next(Constants.MAX_COLOUR_VAL + 1);
Color curColour = Color.FromArgb(r, b, g);
newData[digit] = curColour;
}
//make the being and give it data
GABeingColour newguy = new GABeingColour(newData, target);
//put the being in chromosomes
chromosomes[pop] = newguy;
}
}
//draws the current chromosome
private void DrawChromosome(GABeingColour guy, Graphics canvas, int canvasSize, int blockSize, int sideSize)
{
int index = 0; //index of the color in the chromosome to be drawn
for (int y = 0; y < sideSize; y++)
{
//generate ypos
int yPos = y * blockSize;
for (int x = 0; x < sideSize; x++)
{
//generate xpos
int xPos = x * blockSize;
//generate rectangle
Rectangle drawRect = new Rectangle(xPos, yPos, blockSize, blockSize);
//pull the drawing color from the chromosome
Color drawCol = guy.Data[index];
index++;
//draw
Brush fill = new SolidBrush(drawCol);
canvas.FillRectangle(fill, drawRect);
}
}
}
