let objects = [];

const fov = 1.35;

const res = 20;         // PLAY WITH THIS (pixel resolution)

const speed = 0.1;      // PLAY WITH THIS (ship speed)

​

function setup() {

  frameRate(50);         // PLAY WITH THIS (framerate max)

  createCanvas(600, 600);

  player = new Player([speed,speed,speed,speed,speed], res, fov);

  objects.push(new WorldObject(0, 0, -1, 0, 0.2));

}

​

function draw() {

  //background(220, 50);

  background(0);

​

  if (keyIsDown(32)) player.moveForw(); // SPACEBAR

  if (keyIsDown(96)) player.moveBack(); // 0

  if (keyIsDown(65)) player.lookLeft(); // a

  if (keyIsDown(68)) player.lookRight(); // d  

  if (keyIsDown(87)) player.lookUp(); // w

  if (keyIsDown(83)) player.lookDown(); // s  

  if (keyIsDown(79)) player.rollLeft(); // o  

  if (keyIsDown(80)) player.rollRight(); // p  

  if (keyIsDown(LEFT_ARROW)) player.strafeLeft(); // Left Arrow

  if (keyIsDown(RIGHT_ARROW)) player.strafeRight(); // Right Arrow

  if (keyIsDown(UP_ARROW)) player.strafeUp(); // Left Arrow

  if (keyIsDown(DOWN_ARROW)) player.strafeDown(); // Right Arrow

​

  // Ray tracing section:

  //objects.push(player);

  push();

  noStroke();

  rectMode(CENTER);

  let marcher = new Marcher(player.phi);

  for (let mi = 0; mi < res; mi++) {

    for (let ni = 0; ni < res; ni++) {

      marcher.reset();

      marcher.turnRight(player.fov / 2 - (ni+0.5) * player.fov / player.res);

      marcher.turnDown(player.fov / 2 - (mi+0.5) * player.fov / player.res);

      marcher.step(player.r + 0.001);

      let col = 255 * (1 - player.rayMarch(marcher, objects, 0) / TWO_PI);

      fill(col);

      rect((ni + 0.5) * width / res, (mi + 0.5) * height / res, width / res, height / res);

    }

  }

  pop();

  //objects.pop();

  noStroke();

  fill(128);

  text("FR: " + frameRate().toFixed(1), width - 55, 20);

  text("x: " + player.phi[0][0].toFixed(2), width - 50, 40);

  text("y: " + player.phi[1][0].toFixed(2), width - 50, 60);

  text("z: " + player.phi[2][0].toFixed(2), width - 50, 80);

  text("w: " + player.phi[3][0].toFixed(2), width - 50, 100);

  text("dx: " + player.phi[0][1].toFixed(2), width - 50, 130);

  text("dy: " + player.phi[1][1].toFixed(2), width - 50, 150);

  text("dz: " + player.phi[2][1].toFixed(2), width - 50, 170);

  text("dw: " + player.phi[3][1].toFixed(2), width - 50, 190);

}

​

function keyPressed() {

  if (keyCode === ENTER) {

    objects.push(new WorldObject(player.phi[0][0], player.phi[1][0], player.phi[2][0], player.phi[3][0], 0.05));

  } else if (keyCode === BACKSPACE) {

    objects.pop();

  }

}