Hey there! I had a quite extensive look into phaser 3 with matter.js the last couple of weeks and am at a crossroads right now. The main issue lies within the game update loop and how matter.js works and updates with it. I work on a 144hz monitor and was not able to get the physics simulation runn…

I think I was a little to hasty with my optimism yesterday. While forces kinda work correctly and take delta times into account, objects without forces are moving completely without interferences of delta times. Exmaple: An object without friction moving at a constant velocity (e.g in space or waht…

I am facing the exact same problem right now ; physic is very different on a 144 Hz screen and a 60 Hz one. I think it is a MatterJS issue https://github.com/liabru/matter-js/issues/851 The only solution I see is to use another physics engine like PlanckJS, which doesn’t have this problem.

Hi Guys… I have just hit this problem… I have managed to limit my game update frame rate loop to 60Hz on a really fast computer with 144Hz monitor, but matter is obviously still running wild as gravity appears to be much stronger on my sons computer than it is on mine. My game is completely broken…

If you are sure that your game is actually doing only 60 updates a second, you could set world.autoUpdate to false and just do a world.step() every frame.

I am testing that now - Thanks for getting back to me…

Thankyou very much. That is now proven to work on 144Hz monitor. In Create… this.matter.world.autoUpdate = false; In update update(time, delta) { frameTime += delta; if (frameTime > 16.5) { frameTime -= 16.5; Game Updates this.matter.world.…

I don’t think frameTime is necessary. You can just do step(delta). And I would use a more exact 1000/60.

Ahh - Yes I understand, but that is my main game update loop as well. Have updated to 1000/60. Cheers again for your help

You still shouldn’t use frameTime. Always use delta, and update your game proportionally. i.e. multiply everything with delta / (1000/60). This works for every Hz setting. Your loop is not correct, because frameTime will grow if delta is large when the game is slow for some reason. On 144 Hz it wil…

Thanks again Milton… I’m sorry but I don’t quite understand. What do you mean by multiply everything with delta / (1000/60).? I’d be very grateful if you could give a code sample. Cheers Martin

Question about Matter.js and its update loop

Phaser 3

samme July 8, 2023, 3:41am 22

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Question about Matter.js and its update loop

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