Problems with WebGL on Ipad Air 2 with Safari / Chrome / Firefox

Target Platforms Mobile
1

Hello!

I’am trying to launch a webgl app using Unity and WebGL. Everything worked well until I have included RayCasting code like this:

                RaycastHit hit;
                Ray ray = mainCamera.GetComponent<Camera>().ScreenPointToRay(Input.mousePosition);

                if (Physics.Raycast(ray, out hit))
                {
}

Then WebGL stucks at 90%, all the times. Just deleting those lines and everything works again. This problem is not happening on Windows or Android.

Any idea?

Thanks in advance!

ps- Unity version Unity 2019.2.0a4 (64-bit) but the same problem happens with Unity 2018.3.5f1 (64-bit)

2

The problem is “Error: Out of executable memory in function at index…”, probably a bug with webkit. Apple…

Any idea?

3

Is that the only place you reference physics? Physics will greatly inflate your code size so it’s probably being stripping out when you delete those lines. The “Error: Out of executable memory in function at index…” error is safari’s wasm compiler running out of memory. In iOS 12.2 they doubled it making it feasible for non-trivial Unity webgl apps to work. Before 12.2, we basically could only get an empty scene to compile on iOS.

4

Hi kognito1.

I’ve IOS 12.2 installed and the problem seems to happen less but still happens. I will try to remove unused assemblies mannually, not sure if that will do the job :expressionless:

5

Does it happen after immediately opening a new tab and navigating?

6

It is random, sometimes never, sometimes 4-5 times before do it without errors. For now i have checked console, if “Error: Out of executable memory in function at index” is catched i just reload the scene till it load correctly.