Physics run way to fast on a really good gaming PC

[lafkpages]

I showed my cousin a game I made with Matter.js but his computer is so good the game runs like 3 to 4 times faster than it should and is impossible to play.

Is there a way to set an FPS limit?

[ggorlen]

Are you using your own runner or the built-in MJS runner? A minimal example would be useful.

[lafkpages]

Built-in runner.

This is how the runner is made.

// create runner
let runner = Runner.create({
  isFixed: false // I tried both true and false, same result
});

// run the engine
Runner.run(runner, engine);

The full script is here (didn't post all because it's 2.3k lines of code)
The game is here

[ProgrammingLife]

So what to do with 144Hz?
If we have 30fps then we need to add one more extra step. Ok. But what to do with 144fps?

[LexSerest]

Fix fps / fix fast simulation

Events.on(runner, 'tick',() => {
  runner.deltaMin = runner.fps > 60 ? 1000 / runner.fps : 1000 / 60;
})

I have been solving this problem for a long time.

how to catch a bug

chrome increases fps when you lose focus from the active tab

an example with the use of an official demo

focus:

unfocus:

@liabru please add a fix to the runner code

[MinhChanh6]

Hi everyone, I try with the code of @LexSerest above but it doesn't work?!.

Has anyone found a way yet?

Here my example code:

[catinrage]

@MinhChanh6 you missed the this before first runner at line 7, maybe that will fix.

[liabru]

Closing this thread to refer to updates in #702 on this topic, thanks again for the reports here.

[liabru]

As of 0.20.0 there is now built in Matter.Runner support by default for fixed timestep with high refresh displays see #1300.