let ray;

let particle;

​

const sceneW = 400; 

const sceneH = 400; 

​

let sliderFOV;

​

function setup() {

  createCanvas(800, 400);

  walls.push(new Boundary(0,0,sceneW,0));

  walls.push(new Boundary(sceneW,0,sceneW,sceneH));

  walls.push(new Boundary(sceneW,sceneH,0,sceneH));

  walls.push(new Boundary(0,sceneH,0,0));

  for(var i = 0; i < 5; i++){

    walls.push(new Boundary(random(sceneW),random(sceneH),random(sceneW),random(sceneH)));

  }

  particle = new Particle();

  sliderFOV = createSlider(1,180,45);

  sliderFOV.input(changeFOV);

}

​

function changeFOV(){

  let fov = sliderFOV.value();

  particle.updateFOV(fov);

}

​

function draw() {

  if(keyIsDown(LEFT_ARROW)){

    particle.rotate(-0.05);

  }

  if(keyIsDown(RIGHT_ARROW)){

    particle.rotate(0.05);

  }

  if(keyIsDown(UP_ARROW)){

    particle.move(1);

  }

  if(keyIsDown(DOWN_ARROW)){

    particle.move(-1)

  }

  background(10);

  for(let wall of walls){

    wall.show();

  }

  //particle.update(mouseX,mouseY);

  particle.show();

  var scene = particle.look(walls);

  var w = sceneW / scene.length;

  push();

  translate(sceneW,0);

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

    noStroke();

    let b = map(scene[i]*scene[i],0,sceneW*sceneW,255,0);

    fill(b);

    let h = map(scene[i],0,sceneW,sceneH,0)

    rectMode(CENTER);

    rect(i * w + w / 2,sceneH/2,w,h);

  }

  pop();

  //ray.show();

  //ray.lookAt(mouseX,mouseY);

  //let pt = ray.cast(wall);

  //if(pt){

  //  fill(255);

  //  ellipse(pt.x,pt.y,10,10);

  //}

}