top-down-action-adventure/src/game.js

import Player from "./player.js"
import Input from "./input.js"

export default class Game {
  constructor(canvas) {
    this.canvas = canvas
    this.ctx = canvas.getContext("2d")
    this.timestamp = 0
    this.actors = []
    this.actors.push(new Player(this, 200, 200))

    this.input = new Input().initialize()
  }

  start() {
    requestAnimationFrame(this.loop.bind(this))
  }

  loop(timestamp) {
    const dt = timestamp - this.timestamp
    this.timestamp = timestamp
    this.tick(dt)
    this.draw()

    requestAnimationFrame(this.loop.bind(this))
  }

  tick(dt) {
    this.actors.forEach(actor => actor.tick(dt))
  }

  draw() {
    const { canvas, ctx } = this
    ctx.drawImage(this.assets.get("tilesheet"), 0, 0)
    this.actors.forEach(actor => actor.draw(ctx))
  }
}