phaser 2.0.2 arcade physics bug

[Moe]

hi,

     change the following in starstruck example:  game.physics.arcade.gravity.y = 250; to  game.physics.arcade.gravity.y = 600; and minimize the browser screen.

when you return the player sprite will skip one collision with the layer.

[rich]

Yes because it comes back in with a large delta timer and gravity is so high its forcing it to tunnel through the platform.

 

Set Time.deltaCap to something other than zero to limit the maximum the delta can ever rise to and it will prevent this. There's no "standard" value it should be, it's dependant on each game really.

[BunBunBun]

same issue, tried different values from game.time.deltaCap = 0.1 to game.time.deltaCap = 100000000

did not help.

[Moe]

I tried changing game.time.deltaCap to some number other than zero, I even tried a negative number : ) still no result.

[rich]

I can't recreate this even with a gravity of 1200, however the deltaCaps you're trying are massive The delta timer in a 60fps system would be 0.016 normally. So capping it at even 0.1 is still really high. Try somewhere between 0.02 to 0.05.

[BunBunBun]

Thanks rich! game.time.deltaCap = 0.02, helped in my case.

 

Let me know please what is the best delta timer in a 15-20fps system? how to calculate it dynamically?

[rich]

delta is the number of ms that has elapsed between this frame and the previous frame, divided by 1000.

 

So in a solid 60fps system it's 16.666 / 1000 = 0.016 (recurring) - the 16.666 coming from 1000 (ms in a second) / 60, i.e. one frame every 16.6 ms for 60 frames in a second.

 

For 20fps it'd be 50 / 1000 = 0.05.

[Moe]

Thanks rich! game.time.deltaCap = 0.02, helped in my case too.