//void main() {
//  double lastTime = performance.now();
//  while(true) {
//    double currentTime = performance.now();
//    double delta = currentTime - lastTime;
//
//    update(delta);
//
//    lastTime = currentTime;
//  }
//}

import 'dart:html';
import 'package:browserloop/game/Game.dart';
import 'package:browserloop/game/LoopExample.dart';

/// The Variable Timestep Loop.
///
/// Perhaps one of the most widely used loops
/// in games for many years. Many game frameworks
/// make use of a loop similar to this.
class VariableTimestep implements LoopExample {
  Game game;
  num id;
  Stopwatch elapsed = new Stopwatch();

  VariableTimestep(Game this.game) {
    elapsed.start();
    window.requestAnimationFrame(eventloop);
  }

  void eventloop(num time) {
    int dt = elapsed.elapsedMilliseconds;
    game.update(dt);
    game.draw();
    elapsed.reset();

    id = window.requestAnimationFrame(eventloop);
  }

  void stop() {
    window.cancelAnimationFrame(id);
  }

  void start() {
    window.requestAnimationFrame(eventloop);
  }
}