// Created By NSB

​

// Note for Dan:<3 your videos. Keep up the great work.

// Use the projected distance to get rid of the fisheye

// Matt Godbolt has an excelent video on this topic.

// Look around 3:00 and 10:05 for more info.

// https://www.youtube.com/watch?v=eOCQfxRQ2pY

​

let totalWalls = 5;

​

let scale = 50;

let slider;

let check;

let button;

let col;

​

let MantaRay;

let rays = [];

let walls = [];

let lines = [];

let pos;

​

function setup() {

  createCanvas(800, 400);

  angleMode(DEGREES);

  stroke(255);

​

  slider = createSlider(0, 180, 100, 2);

  slider.position(85);

  check = createCheckbox();

  check.position(25);

  button = createButton('New Walls');

  button.position(310);

  button.mousePressed(makeWalls);

  col = createColorPicker('red');

  col.position(250);

​

  pos = createVector(width / 4, height / 2);

  MantaRay = new Ray(pos, 0);

​

​

  //Raylet Generation

  makeRays();

​

  //Wall Generation

  makeWalls();

​

}

​

function draw() {

  background(0);

  // noLoop();

  lines = []

  ui();

  // MantaRay.show();

  // MantaRay.lookAt(mouseX, mouseY);

  makeRays();

​

  for (let wall of walls) {

    wall.show();

  }

​

  if (check.checked()) {

    castMagic2();

    // castMagic();

  } else {

    castMagic2();

  }

  scene();

}

​

function castMagic() {

  for (let ray of rays) {

    let closest = null;

    let record = Infinity;

    for (let wall of walls) {

      let pt = ray.cast(wall);

      if (pt) {

        let d = p5.Vector.dist(pos, pt);

        if (d < record) {

          record = d;

          closest = pt;

        }

      }

    }

    if (closest) {

      line(pos.x, pos.y, closest.x, closest.y);

      render(closest);

    }

  }

}

​

function marchMagic() {

  for (let ray of rays) {

    let closest = null;

    let record = Infinity;

    for (let wall of walls) {

      let pt = ray.march(wall);

      if (pt) {

        let d = p5.Vector.dist(pos, pt);

        if (d < record) {

          record = d;

          closest = pt;

        }

      }

    }

    if (closest) {

      line(pos.x, pos.y, closest.x, closest.y);

      render(closest);

    }

  }

}

​

function makeWalls() {

  //Wall Generation

  walls = []

  for (let j = 0; j < totalWalls; j++) {

    // walls[j] = new Barrier(200, 100, 300, 250);

    walls[j] = new Barrier(random(width / 4, width / 2), random(0, height / 2), random(width / 4, width / 2), random(height / 2, height));

    let x1 = random(width - sceneW);

    let y1 = random(height);

    let x2 = random(width - sceneW);

    let y2 = random(height);

    let type = 1;

    walls[j] = new Barrier(x1, y1, x2, y2, type);

  }

  walls.push(new Barrier(0, 0, width / 2, 0));

  walls.push(new Barrier(width / 2, 0, width / 2, height));

  walls.push(new Barrier(0, 0, 0, height));

  walls.push(new Barrier(0, height, width / 2, height));

  // walls.push(new Barrier(0,190,width/2,190));

  // walls.push(new Barrier(230,0,290,height));

  // for (let i = 200; i > 0; i--) {

  //   lines.push(i);

  // }

}

​

function makeRays() {

  rays = [];

  for (let a = -(slider.value()) / 2; a <= slider.value() / 2; a += 1) {

    rays.push(new Ray(pos, a));

  }

}

​

function ui() {

  push();

  fill(255);

  text('FOV: ' + slider.value(), 100, height - 10);

  text('Wall Color', 250, height - 10);

  if (check.checked()) {

    // text('Not Working', 5, height - 25);

    text('Fisheye', 15, height - 10);

  } else {

    text('Cast', 22, height - 10);

    pop();

  }

}