[macos] run_in_thread=true doesn't work on macos

[kyeshmz]

Hi I am using this awesome repo alongside trimesh, but the run_in_thread does not seem to work on macos. It seems to not work on the sample provided in the docs, and I get something like below.

My environment is 10.14.2 Mojave xcode 10.2 just in case.

2019-05-16 17:18:54.912 python[10096:8443809] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'NSWindow drag regions should only be invalidated on the Main Thread!'
*** First throw call stack:
(
	0   CoreFoundation                      0x00007fff2abf0ded __exceptionPreprocess + 256
	1   libobjc.A.dylib                     0x00007fff56cbc720 objc_exception_throw + 48
	2   CoreFoundation                      0x00007fff2ac0a87d -[NSException raise] + 9
	3   AppKit                              0x00007fff2810bc8e -[NSWindow(NSWindow_Theme) _postWindowNeedsToResetDragMarginsUnlessPostingDisabled] + 324
	4   AppKit                              0x00007fff2810907c -[NSWindow _initContent:styleMask:backing:defer:contentView:] + 1488
	5   AppKit                              0x00007fff28108aa6 -[NSWindow initWithContentRect:styleMask:backing:defer:] + 45
	6   _ctypes.cpython-37m-darwin.so       0x000000010ebb8377 ffi_call_unix64 + 79
	7   ???                                 0x000070000c8c8460 0x0 + 123145512846432
)
libc++abi.dylib: terminating with uncaught exception of type NSException

[mmatl]

This isn't super surprising unfortunately, but I'm working on a fix. Will comment here when it's added.

[kyeshmz]

Hey sounds awesome, just looked at the windows version of this bug, seems more like a dependency problem with pyglet more than this wrapper itself

[laihaotao]

This isn't super surprising unfortunately, but I'm working on a fix. Will comment here when it's added.

Any upate here? the run_in_thread still doesn't work on mac now? I saw the scissor example on the doc and want to do somthing similar.

[Mathemmagician]

Checking in from the future. Any workarounds?

[madsemildahlgaard]

Did anyone get this to work, @mmatl?

[bakwc]

The workaround is here, https://github.com/mmatl/pyrender/pull/213#issuecomment-1042971849

[aelzeiny]

The issue is that MacOS' Main Thread Checker will never allow UI kit to be run in a background thread. So run_in_thread=True is just flat-out impossible for MacOS Users. The long-term fix here is to make the UI thread run in the foreground while our tasks (Poses/Animations/Morph Targets, etc) run in the background. The Ability to disable auto-start PR is the correct approach. It (A) makes it so that you can declare a Viewer without immediately starting and halting your program while (B) acquiring and releasing the render lock even when run_in_thread is not true.

We should merge that PR into master, remove the run_in_thread param, and close this thread.

[mmatl]

@aelzeiny Yep, that's the long-term fix. I'll have something for this soon, hopefully, that fixes my original design mistake and allows you to schedule UI updates in callbacks without requiring locks at all.

[dslemusp]

Any updates, it's been more than a year. Is the repository dead?