public void ApplyForceInRandomDirection(float strength, RandMT rand)
{
foreach (Fixture fixture in this.fixtures)
{
float angle = rand.UncheckedRandomRange(0.0f, Constants.TwoPi);
Vector2 force = Vector2.FromAngle(angle) * strength;
fixture.Body.ApplyForce(force.ToXna());
}
}
public static void RandomMutaitons()
{
var bmp = new System.Drawing.Bitmap(FILE_IN);
ImageSys img = new ImageSys(bmp);
Texture txt = new Interpolent(img, Intpol.Nearest);
var fitness = BuildFitness(txt);
CPPN network = new CPPN();
VRandom rng = new RandMT();
network.Randomize(rng);
Renderor ren = new Renderor();
ImageSys output = new ImageSys(256, 256);
//img.BMP.Save(FILE_OUT + "test.png");
Console.WriteLine("Building Network...");
for (int i = 0; i < 200; i++)
{
network.Mutate(rng, 1.0);
}
Console.WriteLine("Aproximating Image: " + FILE_IN);
//NOTE: Make it so we don't accept mutations that
//result in NaN fitness!
for (int i = 0; i < MAX_GEN; i++)
{
//network.Mutate(rng, 1.0); //0.1
network.Randomize(rng);
ren.Render(network, output);
string file = i.ToString("0000") + ".png";
output.BMP.Save(FILE_OUT + file);
int nodes = network.NumNurons;
int axons = network.NumAxons;
double fit = fitness(network);
//Console.WriteLine();
Console.WriteLine("Generation " + i + ": " + nodes + " " + axons + " " + fit);
}
}
public static void BuildData()
{
BuildFox();
if (data != null)
{
return;
}
data = new List <SubPixel>(foxpoints.Length * 5);
var bmp = new System.Drawing.Bitmap(FILE_IN);
ImageSys img = new ImageSys(bmp);
Texture txt = new Interpolent(img, Intpol.Sinc3);
VRandom rng = new RandMT();
double u, v;
for (int i = 0; i < foxpoints.Length; i += 2)
{
double x = foxpoints[i];
double y = foxpoints[i + 1];
u = ((2.0 * x) - 256.0) / 256.0;
v = ((2.0 * y) - 256.0) / 256.0;
Color c = txt.Sample(u, -v);
data.Add(new SubPixel(u, -v, c));
for (int j = 0; j < 4; j++)
{
double xp = x + rng.RandGauss() * 0.5;
double yp = y + rng.RandGauss() * 0.5;
u = ((2.0 * xp) - 256.0) / 256.0;
v = ((2.0 * yp) - 256.0) / 256.0;
Color cp = txt.Sample(u, -v);
data.Add(new SubPixel(u, -v, cp));
}
}
bmp.Dispose();
}
