Duncan,
how is quartz() related to rgl? I thought that now you only supported X11 which
wouldn't involve quartz. In general, Cocoa windows are asynchronous, i.e. when
the quartz device is created the window may not exist yet, but I'm not sure why
that would affect rgl (quartz device draws to off-screen buffer so it doesn't
mind if the windows doesn't exist yet). For the X11 device there could be
significant delay with X11 (not related to quartz) if you don't have X11
running yet as users have typically DISPLAY set to a socket which will first
start XQuartz if it's not up yet.
Cheers,
Simon
> On 5/08/2020, at 8:51 AM, Duncan Murdoch <murdoch.dun...@gmail.com> wrote:
>
> I seem to have a workaround for the rgl-related crash. If I insert a one
> second delay after the first quartz() device is opened but before anything is
> plotted, then I don't see the crash. This script does that if the
> RGL_SLOW_DEV environment variable is non-empty:
>
>
>
> if (nchar(Sys.getenv("RGL_SLOW_DEV")))
> options(device = local({
> olddev <- getOption("device")
> function(...) {
> olddev(...)
> Sys.sleep(1)
> options(device = olddev)
> }
> }))
>
> library(rgl)
> plot(1:10)
>
>
> The last two lines are the code to trigger a crash. I'm seeing pretty
> regular crashes if I source this without RGL_SLOW_DEV being set, but setting
> it seems to make things work. I tried reducing the delay to 0.1 seconds and
> it didn't work.
>
> I'd hypothesize that what's happening is that some part of the initialization
> of the quartz() window is asynchronous with the main R thread, and in
> Catalina something about rgl makes it so slow that the window isn't ready
> when R starts plotting there. But I don't know the quartz() device code, so
> this might not be right at all.
>
> Duncan Murdoch
>
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