let dists = [];

​

let shapes = [];

let Epsilon = 1;

let y,x;

let goingDown = true;

let speed = 0.5;

let intersected = [];

let r;

let checkbox;

let player;

​

function setup() {

  rectMode(CENTER);

  createCanvas(400, 400);

  shapeOne = new Shape(createVector(width / 2, height / 4), "square", 100);

  shapes.push(shapeOne);

  y = height / 4;

  x = 0;

  r = 0;

  checkbox = createCheckbox('Show sphere tracing', false);

  player = new Particle(0,0);

}

​

function draw() {

  background(220);

​

  if (keyIsDown(LEFT_ARROW)) {

    if(player.anchor.x>0) player.anchor.x -= 5;

  } else if(keyIsDown(RIGHT_ARROW)) {

    if(player.anchor.x<width) player.anchor.x+= 5;

  }

  if(keyIsDown(UP_ARROW)) {

    if(player.anchor.y>0) player.anchor.y -= 5;

  } else if(keyIsDown(DOWN_ARROW)){

    if(player.anchor.y<height/2) player.anchor.y+= 5;

  }

​

  player.updateLook();

  let anchor = player.getPos();

  // Has to be refactorised

  let radius = 1;

  let offset =  player.getHeading();

​

  for (let theta = -40; theta < 40; theta+=40) {

    let s = anchor.copy();

    s.add(cos(radians(theta)+offset)*radius, sin(radians(theta)+offset)*radius);

    let ray = new Ray(anchor, s);

    rays.push(ray);

  }

​

​

  for (let i = 0; i < rays.length; ++i) {

    dists.push(rays[i].cast());

  }

​

  for (let i = 0; i < rays.length; ++i) {

    rays[i].show();

  }

  rays = [];

​

  fill("white");

  for (let i = 0; i < shapes.length; ++i) {

    shapes[i].show();

  }

​

  for (let i = 0; i < intersected.length; ++i) {

    let el = intersected[i];

    fill("red");

    circle(el.x, el.y, 2);

  }

  push();

  translate(0, height/2);

  noStroke();

  fill("black");

  rect(width/2, height/2, width, height);

  const w = width/dists.length;

  for(let i = 0; i < dists.length; ++i){

    if(dists[i] != Infinity) {

        let sq = dists[i]*dists[i];

        let c = map(sq, 0, width*width/3, 240, 100)

        let h = map(sq, 0, width*width, height/2, 0)

        fill(c);

        rect(w/2+i*w, height/4, w+1, h);

​

    } else {

        fill("black");

        rect(w/2+i*w, height/2, w+1, height);

​

    }

  }

  pop();

  dists = [];

​

}

​

function mousePressed() {

  shapeOne = new Shape(createVector(mouseX, mouseY), "circle", random(10, 100));

  shapes.push(shapeOne);

}

​