gaussianWalker

import java.util.Random;

int num = 10;
Walker[] w = new Walker[num];
Random generator;

void setup() {
  size(800, 600);
  //colorMode(HSB,360,100,100);
  background(#000000);
  for (int i=0; i<num; i++) {
    w[i]= new Walker(i);
  }
  generator = new Random();
}

void draw() {
  for (int i=0; i<num; i++) {
    w[i].step();
    w[i].update();
  }
}

void keyPressed() {
  save(random(12345)+".png");
}

class Walker {

  float x, y;
  color col;
  float medianC;
  float sdC = 15;
  float sz;
  int i;

  Walker(int _i) {
    x = random(width);
    y = random(height);
    col = color(random(50, 255), 0, 0);
    medianC = random(sdC, 360-sdC);
    sz = 10;
    i = _i;
  }

  void step() {

    float stepsize = stepSize()*10;
    println(stepsize);

    float stepX = random(-stepsize, stepsize);
    float stepY = random(-stepsize, stepsize);

    x+= stepX;
    y+= stepY;
  }

  void update() {

    //float rdmC = (float) generator.nextGaussian();
    //col = color(medianC+rdmC*sdC, 90, 90);

    if (i%2==0) {
      fill(255,0,0,150);
    } else {
      fill(0,0,255,150);
    }

    //stroke(#000000,150);
    //noStroke();
    ellipse(x, y, sz, sz);
  }

  float stepSize() {
    while (true) {
      float r1 = random(1);
      float probability = sq(r1);
      float r2 = random(1);
      if (r2<probability) {
        return r1;
      }
    }
  }
}