| Re: NVidia Quadro4 980 XGL card + IDL [message #47333 is a reply to message #47246] |
Thu, 02 February 2006 13:18  |
Dick Jackson
Messages: 347
Registered: August 1998
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Senior Member |
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Hi Chintan,
"Karl Schultz" <k____schultz@rsinc.com> wrote in message
news:pan.2006.02.02.16.58.59.609000@rsinc.com...
> On Thu, 02 Feb 2006 00:01:57 -0800, raval.chintan wrote:
>
>> Dear All,
>>
>> I am using NVidia Quadro 4 980 XGL. One can visualize stereo images
>> using Quad Buffer , available on this card. Proper interface
>> (functions) for rendering images using this buffer are given in
>> OpenGL.. Quad Buffer includes Left and Right Buffer ,which will be
>> rendered one by one.For Visulization of images one needs, shutter
>> glasses with infrared emitter to be connected with graphics card.
Looking at Display Properties for my NVIDIA Quadro FX 1300, it looks like
some graphics cards can support a dozen or more different types of stereo
viewing (red/blue glasses included!). I haven't been able to use these
directly from IDL yet, but Karl's idea below is very promising. (what I
*have* done is figure how to get left-eye view to one monitor, right-eye
view to another, and let some nice hardware get those views to your two
eyes:
http://www.planar.com/Advantages/Innovation/docs/ds-planar-s tereo-mirror.pdf
)
>> Will it be possible to render an image with use of this buffer on IDL
>> Draw widget? or in other way ,Will it be possible call this
>> interface(functions) of OpenGL through IDL?
>
> This is not supported in IDL 6.2, nor will it be in 6.3. We're getting
> enough requests for it that it may be in a release soon.
>
> Although it is not documented or supported, you can make OpenGL calls from
> C-language DLM's if you do things carefully. To do what you want, you'll
> probably have to subclass IDLgrView with IDL code where you would override
> the Draw method. You would also write a C DLM that calls glDrawBuffer
> with GL_BACK_RIGHT.
>
> By the time IDLgrView::Draw is called, the correct GL context is in
> place and IDL has already called glDrawBuffer with GL_BACK (implies
> GL_LEFT as well). Your new Draw method would call the C DLM code to call
> the superclass Draw method, call the C DLM code to set GL_BACK_RIGHT, and
> then call the superclass Draw method again.
>
> Presumably, you would jiggle the viewing transform matrix before each call
> to the superclass Draw to simulate the eye separation. Finally, there's
> probably some call that needs to be made to activate the stereo mode, but
> I don't know enough about that yet to do more than mention it here.
>
> I can't say for sure if this will work, but may be worth a try.
--
Cheers,
--
-Dick
Dick Jackson / dick@d-jackson.com
D-Jackson Software Consulting / http://www.d-jackson.com
Calgary, Alberta, Canada / +1-403-242-7398 / Fax: 241-7392
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