[PD] Re: [PD-announce] wvvw - wave viewer, further adventures

derek holzer derek at x-i.net
Sun May 30 15:00:48 CEST 2004

Hi all

first off, thanks Tom for a terrific new toy!

now for David's comments...

David NG McCallum wrote:
> Okay, so by switching from the 'nv' driver supplied with redhat to the 
> 'nvidia' driver supplied by Nvidia (on a gforce4-somethingorother) I no 
> longer get that weird crash.

Looked like you didn't have any/good OpenGL support with your other 
drivers. You must not run GEM or PDP much, eh? ;-) Try "glxgears" with 
each set of drivers loaded to see the performance difference.

> - closing the window with the mouse causes pd to quit with "pd_gui: pd 
> process exited".

I can back this up, but there is a good reason for it. See below...

> - deleting the wvvw object leaves the wvvw window still in existence

Also true here.

The reason is that the window is called into creation when the wvvw 
library is loaded, not when the object is created. This differs a bit 
from the GEM/PDP paradigm, where the display can be created and 
destroyed, and takes some getting used to, but I wouldn't consider it a bug.

Interestingly enough, multiple objects [reading different arrays] make 
multiple tracks in the window, which are individually selectable. 

> - and once (hasn't been replicated) instantiating wvvw with an unknown 
> array name actually caused my system to hang.

Hasn't happened to me yet....


derek holzer ::: http://www.umatic.nl
---Oblique Strategy # 123:
"Once the search has begun, something will be found"

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