​

// Use a custom probability distribution to vary the size of the random walker’s steps. 

​

//The step size can be determined by influencing the range of values picked with a qualifying random value. 

​

//Can you map the probability to a quadratic function by making the likelihood that a value is picked equal to the value squared?

​

function mousePressed() {

  setup();

}

​

function instructions() {

  textAlign(CENTER, CENTER);

  textSize(24)

  noStroke()

  fill(70)

  text('click mouse to restart', width/2, height/2);

}

​

function acceptreject() {

  while (true) {

    let r1 = random(1);

    // Making the probability of a value being picked equal to the value squared..?

    let probability = sq(r1);

​

    let r2 = random(1);

​

    if (r2 < probability) {

      return r1;

    }

  }

}

​

​

class Walker {

  constructor() {

    this.x = width / 2;

    this.y = height / 2;

  }

​

  step() {

    let step = acceptreject() * 4;

​

    let stepx = random(-step, step);

    let stepy = random(-step, step);

​

    this.x += stepx;

    this.y += stepy;

  }

​

  show() {

    stroke(220);

    strokeWeight(4);

    point(this.x, this.y);

  }

}

​

​

​

function setup() {

  createCanvas(400, 400);

  background(20);

  instructions();

  walker = new Walker();

}

​

function draw() {

  walker.step();

  walker.show();

}

​

​