gloop

Gloop is a fixed timestep game loop manager, decoupling frame events from game tick events.

This allows for deterministic behavior even with variable framerates.

NOTE: This has not been battle tested yet; use at your own risk. (And please report issues)

var gloop = require('gloop')();
 
// Or...
 
var gloop = require('gloop')({
  ticksPerSecond: 300
});
 
// gloop mostly emits events
 
gloop.on('tick', function (dt) {
  // Update logic goes here
  console.log('In-game milliseconds since last tick:', dt);
});
 
gloop.on('frame', function (t) {
  // Render logic goes here
  // `t` is a value between 0 and 1 representing the current
  //  temporal position between ticks; use this to interpolate
  //  rendered motion, if you want. This is especially useful
  //  if you're using gloop.timeScale for dramatic slow-motion
  //  effects.
  console.log('Delta between ticks:', t);
});
 
gloop.on('start', function () {
  console.log('game loop started');
});
 
gloop.on('stop', function () {
  console.log('game loop stopped');
});
 
// Begin/resume looping:
gloop.start();
 
// Run things in slow-motion:
gloop.timeScale = 0.5;
 
// Or high-speed:
gloop.timeScale = 2;
 
// Pause/stop looping:
gloop.stop();

License

MIT

Install

npm install gloop --save

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