[Paraview] FW: paraview3.6.1/OSMesa rendering issue

[Lucy Gagliardi]

I've no problems with rendering, just as long as an openGL window is
able to open on the screen (I don't even need to render directly to it
i.e I can set view.UseOffScreenRenderingForScreenshots  = 1 so the
window opens but is black) 

I had been trying to prevent this window opening to allow scripts to run
in the background.  I get output for all cases except where I use the
--use-offscreen-rendering at the command line for pvpython or pvbatch

Thanks,

Lucy

-----Original Message-----
From: Kevin H. Hobbs [mailto:hobbsk at ohiou.edu] 
Sent: 08 September 2009 10:05
To: Lucy Gagliardi
Cc: paraview at paraview.org
Subject: Re: [Paraview] FW: paraview3.6.1/OSMesa rendering issue

On 09/08/2009 04:02 AM, Lucy Gagliardi wrote:
> Hi, 
>
> I've attached a jpeg version of one of the png output files. It
doesn't
> appear to me that the rgb values are alternating, but there are
definite
> bands of colour. 
>   

Wow, that's really garbled.

It does not look like the problem I've seen before.

> I haven't tried off screen rendering with the gui as I need to be able
> to run the scripts in batch. 
>   

I just want to make sure you can make an output image at all. It does
not have to be a useful rendering just take a screenshot of the sphere
source. Then if that works and if you're doing volume rendering or
something more advanced, then try to make the rendering closer, a little
at a time, to what you are trying to do for real.

The Paraview GUI switches to offscreen rendering to make an output
image, but there is a check-box to turn that off and on.

The problem I've seen where the output images were garbled ( not as
badly as yours ) would happen whenever paraview or vtk took a
screenshot.  It did not matter if I used the GUI or not, offscreen or
not, nor if there was a screen attached to the X server.

> As a work around, I have output the openGL window to a secondary
screen
> (in a similar manner to that you described in a previous post
yesterday)
> which is working fine for my purposes. 
>
> Lucy
>   

So everything works as long as the rendering is displayed on an actual
monitor?




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