main.js

const carCanvas = document.getElementById("carCanvas");
//? Why below line commented ?? Read learning number 1 from learnings.txt
// canvas.height = window.innerHeight;
carCanvas.width = 200;
const networkCanvas = document.getElementById("networkCanvas");
networkCanvas.width = 400;

// COntect to handel everything with car
const carCtx = carCanvas.getContext("2d");
const networkCtx = networkCanvas.getContext("2d");
const road = new Road(carCanvas.width / 2, carCanvas.width * 0.9);
// const car = new Car(road.getLaneCenter(1), 100, 30, 50, "KEYS");
// const car = new Car(road.getLaneCenter(1), 100, 30, 50, "AI");

let N = 400;
const cars = generateCars(N);
let bestCar = cars[0];

if (localStorage.getItem("bestBrain")) {
  for (let i = 0; i < cars.length; i++) {
    cars[i].brain = JSON.parse(localStorage.getItem("bestBrain"));
    if (i != 0) {
      NeuralNetwork.mutate(cars[i].brain, 0.1);
    }
  }
}

const traffic = [
  new Car(road.getLaneCenter(1), -100, 30, 50, "DUMMY", 2),
  new Car(road.getLaneCenter(0), -300, 30, 50, "DUMMY", 2),
  new Car(road.getLaneCenter(2), -300, 30, 50, "DUMMY", 2),
  new Car(road.getLaneCenter(1), -500, 30, 50, "DUMMY", 2),
  new Car(road.getLaneCenter(2), -650, 30, 50, "DUMMY", 2),
  new Car(road.getLaneCenter(0), -900, 30, 50, "DUMMY", 2),
  new Car(road.getLaneCenter(1), -1000, 30, 50, "DUMMY", 2),
  new Car(road.getLaneCenter(0), -1100, 30, 50, "DUMMY", 2),
  new Car(road.getLaneCenter(0), -1200, 30, 50, "DUMMY", 2),
  new Car(road.getLaneCenter(1), -1200, 30, 50, "DUMMY", 2),
  new Car(road.getLaneCenter(1), -1400, 30, 50, "DUMMY", 2),
  new Car(road.getLaneCenter(2), -1300, 30, 50, "DUMMY", 2),
  new Car(road.getLaneCenter(1), -1500, 30, 50, "DUMMY", 2),
  new Car(road.getLaneCenter(0), -1600, 30, 50, "DUMMY", 2),
  new Car(road.getLaneCenter(1), -1700, 30, 50, "DUMMY", 2),
  new Car(road.getLaneCenter(2), -1800, 30, 50, "DUMMY", 2),
  new Car(road.getLaneCenter(1), -1900, 30, 50, "DUMMY", 2),
];

animate();

const refreshButton = document.getElementById("refreshButton");
refreshButton.addEventListener("click", function () {
  location.reload();
});

function save() {
  localStorage.setItem("bestBrain", JSON.stringify(bestCar.brain));
}

function discard() {
  localStorage.removeItem("bestBrain");
}

function generateCars(N) {
  const cars = [];
  for (let i = 1; i <= N; i++) {
    cars.push(new Car(road.getLaneCenter(1), 100, 30, 50, "AI"));
  }
  return cars;
}

function animate(time) {
  for (let i = 0; i < traffic.length; i++) {
    traffic[i].update(road.borders, []);
  }
  for (let i = 0; i < cars.length; i++) {
    cars[i].update(road.borders, traffic);
  }
  bestCar = cars.find((c) => c.y == Math.min(...cars.map((c) => c.y)));

  carCanvas.height = window.innerHeight;
  networkCanvas.height = window.innerHeight;

  carCtx.save();
  carCtx.translate(0, -bestCar.y + carCanvas.height * 0.75);

  road.draw(carCtx);
  for (let i = 0; i < traffic.length; i++) {
    traffic[i].draw(carCtx, "red");
  }

  carCtx.globalAlpha = 0.2;
  for (let i = 0; i < cars.length; i++) {
    cars[i].draw(carCtx, "blue");
  }
  carCtx.globalAlpha = 1;
  bestCar.draw(carCtx, "blue", true);

  carCtx.restore();
  //   Calls animate method again and again which gives illusion of movement
  networkCtx.lineDashOffset = -time / 50;
  Visualizer.drawNetwork(networkCtx, bestCar.brain);

  requestAnimationFrame(animate);
}