Different player speed

[Athelios]

Hello,

Don't know if it is a bug but players with different FPS move by different speed.
I use FreeCamera.
I have got 60 FPS and I move about three times slower then other player with 20 FPS.
That's weird because players with lower FPS should move slowly. I guess there is some speed compensating code.
Also if player is for some time in another browser window and switch to game immediately holding move button he move for a while by huge speed.

Sorry for my English.

Thanks!

[GameMonetize]

Hey!

How do you move your player? Is it using animation? Or using manual coding?

[Athelios]

It is using same move as this: http://www.babylonjs-playground.com/#1N4XAN

In this example on PC with low FPS you move much faster.

[GameMonetize]

This should not be the case as camera speed is based on framerate:

https://github.com/BabylonJS/Babylon.js/blob/master/src/Cameras/Inputs/babylon.freecamera.input.keyboard.ts#L85

[Athelios]

public _computeLocalCameraSpeed(): number {
    var engine = this.getEngine();
    return this.speed * ((engine.getDeltaTime() / (engine.getFps() * 10.0)));
}

In my opinion this function isn't correct.

Example:
FPS = 40, DeltaTime = 25 Result is 0.0625
FPS = 20, DeltaTime = 50 Result is 0.25

This makes player with 20 FPS 4 times faster, but he should be 2 times faster.
Shouldn't be Math.sqrt((engine.getDeltaTime() / (engine.getFps() * 10.0))) ?

[Athelios]

I just tested it and with Math.sqrt is works exactly as it should.
Players now move same speed regardless different FPS.

[GameMonetize]

I'll apply the fix!

Thanks:)

[Athelios]

Thanks!

You should probably change 10 coefficient too because Math.sqrt will speed up player.