// Ray Casting

// CT Commuity Contribution

// by Simon Tiger

​

let walls = [];

let ray;

let particle;

​

const MOVING = 0;

const MAKING = 1;

const REMOVE = 2;

let state = MOVING;

let txt = '';

​

let keyPressedCode = null;

​

function setup() {

  createCanvas(640, 480);

  // for (let i = 0; i < 5; i++) {

  //   let x1 = random(width);

  //   let x2 = random(width);

  //   let y1 = random(height);

  //   let y2 = random(height);

  //   walls[i] = new Boundary(x1, y1, x2, y2);

  // }

  walls.push(new Boundary(-1, -1, width, -1, NaN));

  walls.push(new Boundary(width, -1, width, height, NaN));

  walls.push(new Boundary(width, height, -1, height, NaN));

  walls.push(new Boundary(-1, height, -1, -1, NaN));

​

  particle = new Particle();

}

​

​

function removeWall(id) {

  for (let i in walls) {

    if (walls[i].id === id) {

      walls.splice(i, 1);

      // Should I break out of here??

    }

  }

}

​

function keyPressed() {

  keyPressedCode = keyCode;

  if (state === REMOVE) {

    if (keyCode >= 48 && keyCode < 58) {

      txt += key;

    } else if (keyCode === 13) {

      const id = Number(txt.substring(7, txt.length));

      removeWall(id);

      txt = '';

      state = MOVING;

    } else if (keyCode === 27) {

      const id = Number(txt.substring(7, txt.length));

      txt = '';

      state = MOVING;

    } else if (keyCode === 8 && txt.length > 7) {

      txt = txt.substring(0, txt.length-1);

    }

  } else if (key.toLowerCase() === 'r') {

    state = REMOVE;

    txt = 'Remove ';

  }

}

​

function keyReleased() {

  keyPressedCode = null;

}

​

function mouseReleased() {

  if (state === MAKING) {

    state = MOVING;

  }

}

​

function draw() {

  background(255);

  for (let wall of walls) {

    wall.show();

  }

  if (mouseIsPressed) {

    if (mouseButton === LEFT && state === MOVING && keyPressedCode !== 16) {

      particle.update(mouseX, mouseY);

    } else {

      if (state === MOVING) {

        const id = walls.length-4;

        walls.push(new Boundary(mouseX, mouseY, mouseX, mouseY, id));

        state = MAKING;

      } else if (state === MAKING) {

        walls[walls.length-1].b.set(mouseX, mouseY);

      }

    }

  }

  // particle.show();

  particle.look(walls);

  text(txt, 15, 25);

  // ray.show();

  // ray.lookAt(mouseX, mouseY);

​

  // let pt = ray.cast(wall);

  // if (pt) {

  //   fill(255);

  //   ellipse(pt.x, pt.y, 8, 8);

  // }

}

​