[vtkusers] Mac offscreen drawing

[Paul Schmiedge]

On Jun 14, 2004, at 12:32 PM, Chris Scharver wrote:

> What exactly is it that you're trying to do? Would it be possible to 
> use an existing rendering window at all? Maybe just the built-in VTK 
> functions to save render windows to a file and then quit? Since MacOS 
> X requires windows are created in order to achieve hardware 
> acceleration, the only difference may be that the windows actually 
> appear on the screen. This could at least let you save a series of 
> images in batch mode for the time being.

A series of images generated in batch mode is exactly what I'm aiming 
for.  I know how to save the images I'm rendering to a file, and that 
works just fine.  I'd like to render without a window appearing 
on-screen because the batch rendering process is being initiated by 
another program, which then loads the produced images to display to the 
user for further interaction.  Since the user will be sitting at the 
computer during this process, a bunch of pop-up windows behind the main 
application is hardly desirable.

Is it possible to use the Carbon HideWindow() function in conjunction 
with the WindowPtr from vtkCarbonRenderWindow?  I've tried it, but the 
window still appears briefly.

Thanks,

~ Paul S.