[R-SIG-Mac] rgl window problem

Duncan Murdoch murdoch at stats.uwo.ca
Wed Dec 6 16:14:30 CET 2006

On 12/6/2006 9:51 AM, stefano iacus wrote:
> we usually use .Platform$GUI to check if we are under R.app or under  
> the console
> Un R.app .Platform$GUI="AQUA", under terminal it is set to "X11" (if  
> R is built with X11 support, which is the case of CRAN binary)
> stefano
> p.s. and this is Cocoa not Carbon. The OS X GUI itself is called AQUA  
> though. Both Cocoa and Carbon are layers between the system and the  
> AQUA GUI. So, definitely AQUA but not Carbon.

Thanks.  I'll see if I can put in a test based on .Platform$GUI.

Duncan Murdoch
> On 06/dic/06, at 23:08, Duncan Murdoch wrote:
>> On 12/6/2006 8:43 AM, roger koenker wrote:
>>> I've recently installed rgl on a:
>>> R version 2.5.0 Under development (unstable) (2006-09-10 r39242)
>>> powerpc-apple-darwin8.7.0
>>> system, from source and everything seemed to be ok, the package
>>> loads without complaints, however  trying to run any of the examples
>>> produces the usual window, but no plotting occurs.  The window
>>> is blank, and moving the cursor over the window gives the dreaded
>>> spinning pinwheel of cluelessness.
>>> Can anyone suggest a strategy for further diagnosis?
>> This sounds as though you are running from the console rather than
>> R.app, but have built rgl (or downloaded a copy built) to use AGL in
>> Carbon rather than X11.  That doesn't work.  AGL calls only work  
>> from R.app.
>> If someone knows a nice run-time test for whether Carbon will work I'd
>> put it in to at least give a meaningful error message.  I'd really
>> prefer it to fall back to trying X11 in that case, but that looks much
>> harder:  for an OSX newbie like me, I think the AGL/X11 decision needs
>> to be done at link time, not run time.  (On Windows I'd load the
>> appropriate OpenGL .dll when the package loaded, and do all the calls
>> indirectly.  But I don't know how to do this on OSX.)
>> If my assumption in the first paragraph is wrong, please let me know.
>> And if "Carbon" is the wrong name for the graphics system that  
>> supports
>> the standard Mac GUI and AGL, I wouldn't mind hearing that either.
>> Duncan Murdoch
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