Re: [osg-users] question about passive 3D stereo using polarized projectors and openscenegraph

[Robert Osfield]

Hi Jamie,

Have a read of the stereo docs on the wiki.

On Mon, Dec 1, 2008 at 8:19 PM, lucas Grijander
<[EMAIL PROTECTED]> wrote:
> Hi Jan,
>
> thanks for your comments. We are evaluating a Nvidia Quadro and the other
> option commented by Robert about using horizontal split with two outputs.
>
> By the way, I've been using the examples of running osgviewer xx.osg
> --stereo, but I would like to implement all that in my own code. Is there
> any example/code to have a look? just to have an idea on how to start.
>
> thanks!!
>
> regards,
> Jaime.
>
>
>> From: [EMAIL PROTECTED]
>> To: osg-users@lists.openscenegraph.org
>> Date: Thu, 20 Nov 2008 22:35:24 +0100
>> Subject: Re: [osg-users] question about passive 3D stereo using polarized
>> projectors and openscenegraph
>>
>> Hi Jaime,
>>
>> > Hi everybody!!
>> >
>> > in my lab they want to re-use an old system composed by a Cyviz Stereo
>> > 3D
>> > Converter (xpo.2). It basically consists on a splitter which needs a
>> > frame-sequencial stereo source, and the output is two videos for two
>> > projectors (so passive stereo using polarized projectors & glasses). I
>> > am
>> > quite new with this 3D stuff... I think I should use OSG_STEREO_MODE
>> > with
>> > the QUAD_BUFFER option.
>>
>> Yes, that is the correct setup for the this system (we have the Vizwall
>> ourselves).
>>
>> > My question is more about the graphics card
>> > required for that, do we need any special card for that? I have a laptop
>> > with a NVIDIA geforce 8700GT, do you think it is possible to use it like
>> > that?
>>
>> Nope. You need an Nvidia Quadro or ATI FireGL card that has the
>> QUAD_BUFFER
>> support and has also the special mini DIN 3-pin synchronization connector.
>> The
>> cable from that goes into the xpo boxes, without the sync you will not get
>> stable stereo.
>>
>> The consumer cards (GeForce/Radeon) do not support neither the QUAD_BUFFER
>> mode nor have the required hardware for the synchronization.
>>
>> Regards,
>>
>> Jan
>>
>
> 
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Re: [osg-users] question about passive 3D stereo using polarized projectors and openscenegraph

[lucas Grijander]

Hi Jan,

thanks for your comments. We are evaluating a Nvidia Quadro and the other 
option commented by Robert about using horizontal split with two outputs.

By the way, I've been using the examples of running osgviewer xx.osg --stereo, 
but I would like to implement all that in my own code. Is there any 
example/code to have a look? just to have an idea on how to start.

thanks!!

regards,
Jaime.


> From: [EMAIL PROTECTED]
> To: osg-users@lists.openscenegraph.org
> Date: Thu, 20 Nov 2008 22:35:24 +0100
> Subject: Re: [osg-users] question about passive 3D stereo using polarized     
> projectors and openscenegraph
> 
> Hi Jaime,
> 
> > Hi everybody!!
> >
> > in my lab they want to re-use an old system composed by a Cyviz Stereo 3D
> > Converter (xpo.2). It basically consists on a splitter which needs a
> > frame-sequencial stereo source, and the output is two videos for two
> > projectors (so passive stereo using polarized projectors & glasses). I am
> > quite new with this 3D stuff... I think I should use OSG_STEREO_MODE with
> > the QUAD_BUFFER  option. 
> 
> Yes, that is the correct setup for the this system (we have the Vizwall 
> ourselves).
> 
> > My question is more about the graphics card
> > required for that, do we need any special card for that? I have a laptop
> > with a NVIDIA geforce 8700GT, do you think it is possible to use it like
> > that?
> 
> Nope. You need an Nvidia Quadro or ATI FireGL card that has the QUAD_BUFFER 
> support and has also the special mini DIN 3-pin synchronization connector. 
> The 
> cable from that goes into the xpo boxes, without the sync you will not get 
> stable stereo.
> 
> The consumer cards (GeForce/Radeon) do not support neither the QUAD_BUFFER 
> mode nor have the required hardware for the synchronization.
> 
> Regards,
> 
> Jan
> 

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Re: [osg-users] question about passive 3D stereo using polarized projectors and openscenegraph

[Jan Ciger]

Hi Jaime,

> Hi everybody!!
>
> in my lab they want to re-use an old system composed by a Cyviz Stereo 3D
> Converter (xpo.2). It basically consists on a splitter which needs a
> frame-sequencial stereo source, and the output is two videos for two
> projectors (so passive stereo using polarized projectors & glasses). I am
> quite new with this 3D stuff... I think I should use OSG_STEREO_MODE with
> the QUAD_BUFFER  option. 

Yes, that is the correct setup for the this system (we have the Vizwall 
ourselves).

> My question is more about the graphics card
> required for that, do we need any special card for that? I have a laptop
> with a NVIDIA geforce 8700GT, do you think it is possible to use it like
> that?

Nope. You need an Nvidia Quadro or ATI FireGL card that has the QUAD_BUFFER 
support and has also the special mini DIN 3-pin synchronization connector. The 
cable from that goes into the xpo boxes, without the sync you will not get 
stable stereo.

The consumer cards (GeForce/Radeon) do not support neither the QUAD_BUFFER 
mode nor have the required hardware for the synchronization.

Regards,

Jan



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Re: [osg-users] question about passive 3D stereo using polarized projectors and openscenegraph

[Jan Ciger]

> Hi Jaime,
>
> The way I would do passive stereo with two projectors is to attach the
> projectors directly to the two outputs from the graphics card, and
> then use horizontal split stereo to drive them.  The OSG supports this
> set up out of the box.  Using this setup will avoid any need to use
> quad buffer stereo and the limits on hardware/drivers that it
> imposses, and it also the best way to drive such a system
> quality/performance wise.
>

Actually, we have the same Cywiz/Xpo setup. The system works as a normal 
field-sequential system, the xpo boxes act as signal converters/demultiplexers 
converting the sequential video to two signals for the "left" and "right" 
projectors.

So yes, you run this with a QUAD_BUFFER mode.

The two outputs of a graphic card do not help, these walls have usually 4+ 
projectors with hardware blending.

Jan


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Re: [osg-users] question about passive 3D stereo using polarized projectors and openscenegraph

[Robert Osfield]

Hi Jaime,

On Thu, Nov 20, 2008 at 2:48 PM, lucas Grijander
<[EMAIL PROTECTED]> wrote:
> I also agree with you, maybe it's better to find a computer with double
> output.

Another possible solution you could explore is to buy a Matrox
DualHead2Go box that takes a single input and generates two separate
outputs.  I've tested a TripleHead2Go under Linux a few years back and
it worked just fine albeit with a bit soft image quality vs normal
monitor output but it still worked.

On the OSG side you'd just create a single window across a wide
desktop and use the horizontal split stereo to direct the correct eye
output to each projector.

Robert.
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Re: [osg-users] question about passive 3D stereo using polarized projectors and openscenegraph

[Vincent Bourdier]

Thanks a lot :-)
I'm just curious and interested.

Regards,
Vincent.

2008/11/20 Jean-Christophe Lombardo <
[EMAIL PROTECTED]>

> Bonjour Vincent,
>
> Vincent Bourdier wrote:
>
>> Off topic question but : Where did you find theses glasses ? very
>> difficult to find it in France, as free of course...
>>
> We've recently bought a lot of anaglyphic glasses from
> http://www.buy3dglasses.fr/hapack.php
> and they are just fine.
>
> jcl
> --
> Jean-Christophe Lombardo   Espace Immersif   DREAM / INRIA
> 2004 route des Lucioles - BP93 - 06902 Sophia Antipolis Cedex - France
> http://www.inria.fr/sophiaC013 Tel.: +33 4 92 38 50 26
>
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Re: [osg-users] question about passive 3D stereo using polarized projectors and openscenegraph

[Jean-Christophe Lombardo]

Bonjour Vincent,

Vincent Bourdier wrote:
Off topic question but : Where did you find theses glasses ? very 
difficult to find it in France, as free of course...
We've recently bought a lot of anaglyphic glasses from 
http://www.buy3dglasses.fr/hapack.php

and they are just fine.

jcl
--
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Re: [osg-users] question about passive 3D stereo using polarized projectors and openscenegraph

[Tomlinson, Gordon]

My understanding is only the Quadro range of cards from NVidia support
quad buffer 
 

Gordon

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From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of lucas
Grijander
Sent: Thursday, November 20, 2008 9:49 AM
To: OpenSceneGraph Users
Subject: Re: [osg-users] question about passive 3D stereo using
polarized projectors and openscenegraph


I'm trying to find if my geforce 8700M GT in my laptops accepts
quad-buffer... how do you find that?

I also agree with you, maybe it's better to find a computer with double
output. 

We already have the non-polarized surface... as you say, we have a very
good stuff here, so we must use it!!

Jaime.

> Date: Thu, 20 Nov 2008 15:31:34 +0100
> From: [EMAIL PROTECTED]
> To: osg-users@lists.openscenegraph.org
> Subject: Re: [osg-users] question about passive 3D stereo using
polarized projectors and openscenegraph
> 
> Vincent Bourdier wrote:
> >
> >
> > 2008/11/20 Paul Melis <[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>>
> >
> > lucas Grijander wrote:
> >
> > you are right, but I have polarized glasses that go together
> > with the polarized lenses of the projectors. I think we can
> > have much better quality like that.
> >
> > You might be surprised. Depending on the polarization type and
> > filter quality there can be a lot of ghosting in the images. You
> > also need a good alignment on your projectors.
> >
> >
> > Of course, the calibration and the settings of the material will be
a 
> > little complicated at the beginning. But With this material, active 
> > stereo is possible, and this will render very well.
> > Without 2 graphic output on your graphic card, I would be very 
> > difficult to set an active stereo I think... maybe with special 
> > synchronisation to allow the projectors to get the output each one 
> > after the other ? I don't know...
> >
> > By the way, this seems to be good material, have fun :-)
> As the OP already seems to have projectors and polarization filters
and 
> such it would be easiest to just find a PC with 2 outputs and drive
the 
> projectors directly, as Robert suggested.
> In case he does: remember to use a projection surface that doesn't 
> destroy the polarization ;-)
> >
> > But polarized glasses are a lot more convenient to wear than those
> > bloody shutter glasses.
> >
> >
> > :D
> Yesterday I showed a group of students anaglyphic pictures after
giving 
> them the red-blue glasses. Quite funny to see a classroom full of
those 
> things :)
> And even those are still more fashionable than crystaleyes...
> 
> P
> 
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Re: [osg-users] question about passive 3D stereo using polarized projectors and openscenegraph

[Paul Melis]

lucas Grijander wrote:
I'm trying to find if my geforce 8700M GT in my laptops accepts 
quad-buffer... how do you find that?
Only Quadro's support quad-buffered stereo officially. There used to be 
softmods around to turn a Geforce into a Quadro but I don't think these 
work anymore these days


Paul


I also agree with you, maybe it's better to find a computer with 
double output.


We already have the non-polarized surface... as you say, we have a 
very good stuff here, so we must use it!!


Jaime.

> Date: Thu, 20 Nov 2008 15:31:34 +0100
> From: [EMAIL PROTECTED]
> To: osg-users@lists.openscenegraph.org
> Subject: Re: [osg-users] question about passive 3D stereo using 
polarized projectors and openscenegraph

>
> Vincent Bourdier wrote:
> >
> >
> > 2008/11/20 Paul Melis <[EMAIL PROTECTED] 
<mailto:[EMAIL PROTECTED]>>

> >
> > lucas Grijander wrote:
> >
> > you are right, but I have polarized glasses that go together
> > with the polarized lenses of the projectors. I think we can
> > have much better quality like that.
> >
> > You might be surprised. Depending on the polarization type and
> > filter quality there can be a lot of ghosting in the images. You
> > also need a good alignment on your projectors.
> >
> >
> > Of course, the calibration and the settings of the material will be a
> > little complicated at the beginning. But With this material, active
> > stereo is possible, and this will render very well.
> > Without 2 graphic output on your graphic card, I would be very
> > difficult to set an active stereo I think... maybe with special
> > synchronisation to allow the projectors to get the output each one
> > after the other ? I don't know...
> >
> > By the way, this seems to be good material, have fun :-)
> As the OP already seems to have projectors and polarization filters and
> such it would be easiest to just find a PC with 2 outputs and drive the
> projectors directly, as Robert suggested.
> In case he does: remember to use a projection surface that doesn't
> destroy the polarization ;-)
> >
> > But polarized glasses are a lot more convenient to wear than those
> > bloody shutter glasses.
> >
> >
> > :D
> Yesterday I showed a group of students anaglyphic pictures after giving
> them the red-blue glasses. Quite funny to see a classroom full of those
> things :)
> And even those are still more fashionable than crystaleyes...
>
> P
>
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Re: [osg-users] question about passive 3D stereo using polarized projectors and openscenegraph

[lucas Grijander]

I'm trying to find if my geforce 8700M GT in my laptops accepts quad-buffer... 
how do you find that?

I also agree with you, maybe it's better to find a computer with double output. 

We already have the non-polarized surface... as you say, we have a very good 
stuff here, so we must use it!!

Jaime.

> Date: Thu, 20 Nov 2008 15:31:34 +0100
> From: [EMAIL PROTECTED]
> To: osg-users@lists.openscenegraph.org
> Subject: Re: [osg-users] question about passive 3D stereo using polarized 
> projectors and openscenegraph
> 
> Vincent Bourdier wrote:
> >
> >
> > 2008/11/20 Paul Melis <[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>>
> >
> > lucas Grijander wrote:
> >
> > you are right, but I have polarized glasses that go together
> > with the polarized lenses of the projectors. I think we can
> > have much better quality like that.
> >
> > You might be surprised. Depending on the polarization type and
> > filter quality there can be a lot of ghosting in the images. You
> > also need a good alignment on your projectors.
> >
> >
> > Of course, the calibration and the settings of the material will be a 
> > little complicated at the beginning. But With this material, active 
> > stereo is possible, and this will render very well.
> > Without 2 graphic output on your graphic card, I would be very 
> > difficult to set an active stereo I think... maybe with special 
> > synchronisation to allow the projectors to get the output each one 
> > after the other ? I don't know...
> >
> > By the way, this seems to be good material, have fun :-)
> As the OP already seems to have projectors and polarization filters and 
> such it would be easiest to just find a PC with 2 outputs and drive the 
> projectors directly, as Robert suggested.
> In case he does: remember to use a projection surface that doesn't 
> destroy the polarization ;-)
> >
> > But polarized glasses are a lot more convenient to wear than those
> > bloody shutter glasses.
> >
> >
> > :D
> Yesterday I showed a group of students anaglyphic pictures after giving 
> them the red-blue glasses. Quite funny to see a classroom full of those 
> things :)
> And even those are still more fashionable than crystaleyes...
> 
> P
> 
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Re: [osg-users] question about passive 3D stereo using polarized projectors and openscenegraph

[Vincent Bourdier]

2008/11/20 Paul Melis <[EMAIL PROTECTED]>

> Vincent Bourdier wrote:
>
>>
>>
>> 2008/11/20 Paul Melis <[EMAIL PROTECTED] >
>>
>>lucas Grijander wrote:
>>
>>you are right, but I have polarized glasses that go together
>>with the polarized lenses of the projectors. I think we can
>>have much better quality like that.
>>
>>You might be surprised. Depending on the polarization type and
>>filter quality there can be a lot of ghosting in the images. You
>>also need a good alignment on your projectors.
>>
>>
>> Of course, the calibration and the settings of the material will be a
>> little complicated at the beginning. But With this material, active stereo
>> is possible, and this will render very well.
>> Without 2 graphic output on your graphic card, I would be very difficult
>> to set an active stereo I think... maybe with special synchronisation to
>> allow the projectors to get the output each one after the other ? I don't
>> know...
>>
>> By the way, this seems to be good material, have fun :-)
>>
> As the OP already seems to have projectors and polarization filters and
> such it would be easiest to just find a PC with 2 outputs and drive the
> projectors directly, as Robert suggested.
> In case he does: remember to use a projection surface that doesn't destroy
> the polarization ;-)
>
>>
>>But polarized glasses are a lot more convenient to wear than those
>>bloody shutter glasses.
>>
>>
>> :D
>>
> Yesterday I showed a group of students anaglyphic pictures after giving
> them the red-blue glasses. Quite funny to see a classroom full of those
> things :)
> And even those are still more fashionable than crystaleyes...
>

Off topic question but : Where did you find theses glasses ? very difficult
to find it in France, as free of course...


>
> P
>
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Re: [osg-users] question about passive 3D stereo using polarized projectors and openscenegraph

[Paul Melis]

Vincent Bourdier wrote:



2008/11/20 Paul Melis <[EMAIL PROTECTED] >

lucas Grijander wrote:

you are right, but I have polarized glasses that go together
with the polarized lenses of the projectors. I think we can
have much better quality like that.

You might be surprised. Depending on the polarization type and
filter quality there can be a lot of ghosting in the images. You
also need a good alignment on your projectors.


Of course, the calibration and the settings of the material will be a 
little complicated at the beginning. But With this material, active 
stereo is possible, and this will render very well.
Without 2 graphic output on your graphic card, I would be very 
difficult to set an active stereo I think... maybe with special 
synchronisation to allow the projectors to get the output each one 
after the other ? I don't know...


By the way, this seems to be good material, have fun :-)
As the OP already seems to have projectors and polarization filters and 
such it would be easiest to just find a PC with 2 outputs and drive the 
projectors directly, as Robert suggested.
In case he does: remember to use a projection surface that doesn't 
destroy the polarization ;-)


But polarized glasses are a lot more convenient to wear than those
bloody shutter glasses.


:D
Yesterday I showed a group of students anaglyphic pictures after giving 
them the red-blue glasses. Quite funny to see a classroom full of those 
things :)

And even those are still more fashionable than crystaleyes...

P

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Re: [osg-users] question about passive 3D stereo using polarized projectors and openscenegraph

[lucas Grijander]

hehe, it's not an old card!  it's a new laptop Dell XPS M1730 with a nvidia 
Geforce 8700 GT, I think it's normal that there is no two outputs... isn't it?

Jaime.



> Date: Thu, 20 Nov 2008 13:43:42 +
> From: [EMAIL PROTECTED]
> To: osg-users@lists.openscenegraph.org
> Subject: Re: [osg-users] question about passive 3D stereo using polarized 
> projectors and openscenegraph
> 
> Hi Lucas,
> 
> On Thu, Nov 20, 2008 at 1:17 PM, lucas Grijander
> <[EMAIL PROTECTED]> wrote:
> > the problem is that the video card I have has only one DVI output and an
> > S-Video output, so I think they cannot work as two different outputs.
> 
> Wow.  What card is it?
> 
> You could try the using quad buffer stereo.  Or just rip out the card
> and stick in a standard modern card that will have two DVI output on
> it, it'll only cost a couple hundred dollars to get a decent new card.
> 
> Robert.
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Re: [osg-users] question about passive 3D stereo using polarized projectors and openscenegraph

[Vincent Bourdier]

2008/11/20 Paul Melis <[EMAIL PROTECTED]>

> lucas Grijander wrote:
>
>> you are right, but I have polarized glasses that go together with the
>> polarized lenses of the projectors. I think we can have much better quality
>> like that.
>>
> You might be surprised. Depending on the polarization type and filter
> quality there can be a lot of ghosting in the images. You also need a good
> alignment on your projectors.


Of course, the calibration and the settings of the material will be a little
complicated at the beginning. But With this material, active stereo is
possible, and this will render very well.
Without 2 graphic output on your graphic card, I would be very difficult to
set an active stereo I think... maybe with special synchronisation to allow
the projectors to get the output each one after the other ? I don't know...

By the way, this seems to be good material, have fun :-)

But polarized glasses are a lot more convenient to wear than those bloody
> shutter glasses.


:D

Vincent.


>
>
> Paul
>
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Re: [osg-users] question about passive 3D stereo using polarized projectors and openscenegraph

[Paul Melis]

lucas Grijander wrote:

Hi everybody!!

in my lab they want to re-use an old system composed by a Cyviz Stereo 
3D Converter (xpo.2). 
I just checked the manufacturer's page: those things are still sold at a 
whopping 10,000 pounds. Better put them to use ;)


Paul
It basically consists on a splitter which needs a frame-sequencial 
stereo source, and the output is two videos for two projectors (so 
passive stereo using polarized projectors & glasses). I am quite new 
with this 3D stuff... I think I should use OSG_STEREO_MODE with the 
QUAD_BUFFER  option. My question is more about the graphics card 
required for that, do we need any special card for that? I have a 
laptop with a NVIDIA geforce 8700GT, do you think it is possible to 
use it like that?


many thanks in advance!

regards,

Jaime.


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Re: [osg-users] question about passive 3D stereo using polarized projectors and openscenegraph

[Paul Melis]

lucas Grijander wrote:
you are right, but I have polarized glasses that go together with the 
polarized lenses of the projectors. I think we can have much better 
quality like that.
You might be surprised. Depending on the polarization type and filter 
quality there can be a lot of ghosting in the images. You also need a 
good alignment on your projectors.
But polarized glasses are a lot more convenient to wear than those 
bloody shutter glasses.


Paul
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Re: [osg-users] question about passive 3D stereo using polarized projectors and openscenegraph

[lucas Grijander]

you are right, but I have polarized glasses that go together with the polarized 
lenses of the projectors. I think we can have much better quality like that.

Jaime.

Date: Thu, 20 Nov 2008 15:12:13 +0100
From: [EMAIL PROTECTED]
To: osg-users@lists.openscenegraph.org
Subject: Re: [osg-users] question about passive 3D stereo using polarized   
projectors and openscenegraph



2008/11/20 lucas Grijander <[EMAIL PROTECTED]>






only one projector? but how do you create the 3D effect?

Jaime.

With the filtered glasses.



The passive stereo effect is just that : 2 picture with 2 colored
components (red and blue basically) projeted on a wall/screen with the
interval between the pictures equal to the distance between the eye
(~6cm). The filtered glasses give each eye a different picture, and the
brain have the 3D illusion, 


The active stereo need 2 synchronized projectors and synchronized glasses to 
have the 3D effect. This needs special equipment.



Vincent
 


Date: Thu, 20 Nov 2008 14:59:37 +0100
From: [EMAIL PROTECTED]

To: osg-users@lists.openscenegraph.org
Subject: Re: [osg-users] question about passive 3D stereo using polarized   
projectors and openscenegraph


Can't you use OSG to render stereo pictures on the same output and use only one 
projector ?  Osg_stereo example works like that if I remember well. I don't 
think two projector are needed.

Vincent.



2008/11/20 lucas Grijander <[EMAIL PROTECTED]>






hehe, it's not an old card!  it's a new laptop Dell XPS M1730 with a nvidia 
Geforce 8700 GT, I think it's normal that there is no two outputs... isn't it?

Jaime.



> Date: Thu, 20 Nov 2008 13:43:42 +


> From: [EMAIL PROTECTED]
> To: osg-users@lists.openscenegraph.org


> Subject: Re: [osg-users] question about passive 3D stereo using polarized 
> projectors and openscenegraph
> 
> Hi Lucas,
> 
> On Thu, Nov 20, 2008 at 1:17 PM, lucas Grijander


> <[EMAIL PROTECTED]> wrote:
> > the problem is that the video card I have has only one DVI output and an
> > S-Video output, so I think they cannot work as two different outputs.


> 
> Wow.  What card is it?
> 
> You could try the using quad buffer stereo.  Or just rip out the card
> and stick in a standard modern card that will have two DVI output on
> it, it'll only cost a couple hundred dollars to get a decent new card.


> 
> Robert.
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Re: [osg-users] question about passive 3D stereo using polarized projectors and openscenegraph

[Vincent Bourdier]

2008/11/20 lucas Grijander <[EMAIL PROTECTED]>

>  only one projector? but how do you create the 3D effect?
>
> Jaime.
>

With the filtered glasses.

The passive stereo effect is just that : 2 picture with 2 colored components
(red and blue basically) projeted on a wall/screen with the interval between
the pictures equal to the distance between the eye (~6cm). The filtered
glasses give each eye a different picture, and the brain have the 3D
illusion,

The active stereo need 2 synchronized projectors and synchronized glasses to
have the 3D effect. This needs special equipment.

Vincent


>
>
> --
> Date: Thu, 20 Nov 2008 14:59:37 +0100
> From: [EMAIL PROTECTED]
>
> To: osg-users@lists.openscenegraph.org
> Subject: Re: [osg-users] question about passive 3D stereo using polarized
> projectors and openscenegraph
>
> Can't you use OSG to render stereo pictures on the same output and use only
> one projector ?  Osg_stereo example works like that if I remember well. I
> don't think two projector are needed.
>
> Vincent.
>
> 2008/11/20 lucas Grijander <[EMAIL PROTECTED]>
>
>  hehe, it's not an old card!  it's a new laptop Dell XPS M1730 with a
> nvidia Geforce 8700 GT, I think it's normal that there is no two outputs...
> isn't it?
>
> Jaime.
>
>
>
> > Date: Thu, 20 Nov 2008 13:43:42 +
> > From: [EMAIL PROTECTED]
> > To: osg-users@lists.openscenegraph.org
> > Subject: Re: [osg-users] question about passive 3D stereo using polarized
> projectors and openscenegraph
> >
> > Hi Lucas,
> >
> > On Thu, Nov 20, 2008 at 1:17 PM, lucas Grijander
> > <[EMAIL PROTECTED]> wrote:
> > > the problem is that the video card I have has only one DVI output and
> an
> > > S-Video output, so I think they cannot work as two different outputs.
> >
> > Wow. What card is it?
> >
> > You could try the using quad buffer stereo. Or just rip out the card
> > and stick in a standard modern card that will have two DVI output on
> > it, it'll only cost a couple hundred dollars to get a decent new card.
> >
> > Robert.
> > ___
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Re: [osg-users] question about passive 3D stereo using polarized projectors and openscenegraph

[lucas Grijander]

only one projector? but how do you create the 3D effect?

Jaime.


Date: Thu, 20 Nov 2008 14:59:37 +0100
From: [EMAIL PROTECTED]
To: osg-users@lists.openscenegraph.org
Subject: Re: [osg-users] question about passive 3D stereo using polarized   
projectors and openscenegraph

Can't you use OSG to render stereo pictures on the same output and use only one 
projector ?  Osg_stereo example works like that if I remember well. I don't 
think two projector are needed.

Vincent.


2008/11/20 lucas Grijander <[EMAIL PROTECTED]>






hehe, it's not an old card!  it's a new laptop Dell XPS M1730 with a nvidia 
Geforce 8700 GT, I think it's normal that there is no two outputs... isn't it?

Jaime.



> Date: Thu, 20 Nov 2008 13:43:42 +

> From: [EMAIL PROTECTED]
> To: osg-users@lists.openscenegraph.org

> Subject: Re: [osg-users] question about passive 3D stereo using polarized 
> projectors and openscenegraph
> 
> Hi Lucas,
> 
> On Thu, Nov 20, 2008 at 1:17 PM, lucas Grijander

> <[EMAIL PROTECTED]> wrote:
> > the problem is that the video card I have has only one DVI output and an
> > S-Video output, so I think they cannot work as two different outputs.

> 
> Wow.  What card is it?
> 
> You could try the using quad buffer stereo.  Or just rip out the card
> and stick in a standard modern card that will have two DVI output on
> it, it'll only cost a couple hundred dollars to get a decent new card.

> 
> Robert.
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Re: [osg-users] question about passive 3D stereo using polarized projectors and openscenegraph

[Robert Osfield]

Hi Lucas,

On Thu, Nov 20, 2008 at 1:55 PM, lucas Grijander
<[EMAIL PROTECTED]> wrote:
> hehe, it's not an old card!  it's a new laptop Dell XPS M1730 with a nvidia
> Geforce 8700 GT, I think it's normal that there is no two outputs... isn't
> it?

Stereo and laptops aren't something that normally go together...

If you are lucky the drivers will support quad buffer stereo, but
there is good chance that they won't.  Without this I'm out of ideas.

Robert.
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Re: [osg-users] question about passive 3D stereo using polarized projectors and openscenegraph

[Vincent Bourdier]

Can't you use OSG to render stereo pictures on the same output and use only
one projector ?  Osg_stereo example works like that if I remember well. I
don't think two projector are needed.

Vincent.

2008/11/20 lucas Grijander <[EMAIL PROTECTED]>

>  hehe, it's not an old card!  it's a new laptop Dell XPS M1730 with a
> nvidia Geforce 8700 GT, I think it's normal that there is no two outputs...
> isn't it?
>
> Jaime.
>
>
>
> > Date: Thu, 20 Nov 2008 13:43:42 +
> > From: [EMAIL PROTECTED]
> > To: osg-users@lists.openscenegraph.org
> > Subject: Re: [osg-users] question about passive 3D stereo using polarized
> projectors and openscenegraph
> >
> > Hi Lucas,
> >
> > On Thu, Nov 20, 2008 at 1:17 PM, lucas Grijander
> > <[EMAIL PROTECTED]> wrote:
> > > the problem is that the video card I have has only one DVI output and
> an
> > > S-Video output, so I think they cannot work as two different outputs.
> >
> > Wow. What card is it?
> >
> > You could try the using quad buffer stereo. Or just rip out the card
> > and stick in a standard modern card that will have two DVI output on
> > it, it'll only cost a couple hundred dollars to get a decent new card.
> >
> > Robert.
> > ___
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> > osg-users@lists.openscenegraph.org
> >
> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
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Re: [osg-users] question about passive 3D stereo using polarized projectors and openscenegraph

[Robert Osfield]

Hi Lucas,

On Thu, Nov 20, 2008 at 1:17 PM, lucas Grijander
<[EMAIL PROTECTED]> wrote:
> the problem is that the video card I have has only one DVI output and an
> S-Video output, so I think they cannot work as two different outputs.

Wow.  What card is it?

You could try the using quad buffer stereo.  Or just rip out the card
and stick in a standard modern card that will have two DVI output on
it, it'll only cost a couple hundred dollars to get a decent new card.

Robert.
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Re: [osg-users] question about passive 3D stereo using polarized projectors and openscenegraph

[lucas Grijander]

Hi Robert,

the problem is that the video card I have has only one DVI output and an 
S-Video output, so I think they cannot work as two different outputs.

Jaime.


> Date: Thu, 20 Nov 2008 13:02:28 +
> From: [EMAIL PROTECTED]
> To: osg-users@lists.openscenegraph.org
> Subject: Re: [osg-users] question about passive 3D stereo using polarized 
> projectors and openscenegraph
> 
> Hi Jaime,
> 
> The way I would do passive stereo with two projectors is to attach the
> projectors directly to the two outputs from the graphics card, and
> then use horizontal split stereo to drive them.  The OSG supports this
> set up out of the box.  Using this setup will avoid any need to use
> quad buffer stereo and the limits on hardware/drivers that it
> imposses, and it also the best way to drive such a system
> quality/performance wise.
> 
> Robert.
> 
> On Thu, Nov 20, 2008 at 12:55 PM, lucas Grijander
> <[EMAIL PROTECTED]> wrote:
> > Hi everybody!!
> >
> > in my lab they want to re-use an old system composed by a Cyviz Stereo 3D
> > Converter (xpo.2). It basically consists on a splitter which needs a
> > frame-sequencial stereo source, and the output is two videos for two
> > projectors (so passive stereo using polarized projectors & glasses). I am
> > quite new with this 3D stuff... I think I should use OSG_STEREO_MODE with
> > the QUAD_BUFFER  option. My question is more about the graphics card
> > required for that, do we need any special card for that? I have a laptop
> > with a NVIDIA geforce 8700GT, do you think it is possible to use it like
> > that?
> >
> > many thanks in advance!
> >
> > regards,
> >
> > Jaime.
> >
> > 
> > Discover the new Windows Vista Learn more!
> > ___
> > osg-users mailing list
> > osg-users@lists.openscenegraph.org
> > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
> >
> >
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Re: [osg-users] question about passive 3D stereo using polarized projectors and openscenegraph

[Robert Osfield]

Hi Jaime,

The way I would do passive stereo with two projectors is to attach the
projectors directly to the two outputs from the graphics card, and
then use horizontal split stereo to drive them.  The OSG supports this
set up out of the box.  Using this setup will avoid any need to use
quad buffer stereo and the limits on hardware/drivers that it
imposses, and it also the best way to drive such a system
quality/performance wise.

Robert.

On Thu, Nov 20, 2008 at 12:55 PM, lucas Grijander
<[EMAIL PROTECTED]> wrote:
> Hi everybody!!
>
> in my lab they want to re-use an old system composed by a Cyviz Stereo 3D
> Converter (xpo.2). It basically consists on a splitter which needs a
> frame-sequencial stereo source, and the output is two videos for two
> projectors (so passive stereo using polarized projectors & glasses). I am
> quite new with this 3D stuff... I think I should use OSG_STEREO_MODE with
> the QUAD_BUFFER  option. My question is more about the graphics card
> required for that, do we need any special card for that? I have a laptop
> with a NVIDIA geforce 8700GT, do you think it is possible to use it like
> that?
>
> many thanks in advance!
>
> regards,
>
> Jaime.
>
> 
> Discover the new Windows Vista Learn more!
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