Hi, Im trying to make a fractal drawing following this page instructions:

 

http://en.wikipedia.org/wiki/Barnsley_fern#Construction

 

And it seems OK but I have some problems:

 

1. It seems too few points, but if I try to add more, there is a message that there are too much recursion.

2. Translate and rotate sentences doesnt seems to work with set.

3. random are not really random numbers. How can I have real random numbers?

 

This is the code:

 

void setup(){
  background (255);
  size(width, length, P3D);
 
}

int width = 800;
int length = 800;
float x = 0;
float y = 0;
color col = color (255, 0,0);
int iterations = 0;
int maxiterations =3000;

void draw(){
 
translate (2*width,length/2);
rotate (PI);
 
transform(x,y);

noLoop();
}

void transform(float x,float y){
  float chance;
  float a=0,b=0,c=0,d=0,e=0,f=0;
  iterations++;
  if (iterations < maxiterations){
    set(int(50*x)+200, int(50*y), col);
    //println(str(x)+"   "+str(y));
    chance = random(0,1);
    if (chance  <= 0.01){
      a = 0;
      b = 0;
      c = 0;
      d = 0.6;
      e = 0;
      f = 0;
    }
    if ((chance  > 0.01)&& (chance<=0.86)){
      a = 0.85;
      b = 0.04;
      c = -0.04;
      d = 0.85;
      e = 0;
      f = 1.6;
    }
    if ((chance  > 0.86)&& (chance<=0.93)){
      a = 0.2;
      b = -0.26;
      c = 0.23;
      d = 0.22;
      e = 0;
      f = 1.6;
    }
    if ((chance  > 0.93)&& (chance<=1)){
      a = -0.15;
      b = 0.28;
      c = 0.26;
      d = 0.24;
      e = 0;
      f = 0.44;
    }
    x = a*x + b * y + e;
    y = c*x + d * y + f;
    transform(x,y);
  }
}