Can_Perlin_noise_be_tracked_backwards.pde

float noiseS = 500;//noise scale
float noiseP = 1;//noise power
int iter = 100;//move iteration
PVector p;//particle

void setup(){
  size(500, 500);
  p = new PVector(100, height/2);
  ellipse(p.x, p.y, 10, 10);
  for(int i=0; i<iter; i++){
    float angle = noise(p.x/noiseS, p.y/noiseS)*TWO_PI*8;
    p.add(PVector.fromAngle(angle).mult(noiseP));
    ellipse(p.x, p.y, 10, 10);
  }
  ellipse(p.x, p.y, 10, 10);
  for(int i=0; i<iter; i++){
    float angle = noise(p.x/noiseS, p.y/noiseS)*TWO_PI*8;
    p.add(PVector.fromAngle(angle).mult(-noiseP));
    ellipse(p.x, p.y, 10, 10);
  }
  ellipse(p.x, p.y, 10, 10);
}

void draw(){
  
}