Re: [osg-users] Dual screen support on Linux using TwinView
Hi Robert Thanks a lot for your help. This will do exactly what I need. Cheers Michael On Wed, Nov 26, 2008 at 7:58 PM, Robert Osfield [EMAIL PROTECTED]wrote: Hi Michael, On Wed, Nov 26, 2008 at 12:57 AM, Michael [EMAIL PROTECTED] wrote: Thanks for the clarrification. After reading through the OpenSceneGraph API docs we definitely require two views. So to summarise 2 monitors (projectors) 1 View on each monitor 1 XScreen, and therefore 1 context (if possible). Yep this would be a sensible set up. With setting up the single context you may need to set the Traits::overrideRedirect to true to prevent the window manage resizing the window to just once physical screen. Then create the graphics context, then when you set the each View's master Camera you just assign the same created graphics context so that both Cameras share things single window. The osgcompositeview has code that shares a single context between multiple views so have a look at it. Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Dual screen support on Linux using TwinView
Hi Michael, On Wed, Nov 26, 2008 at 12:57 AM, Michael [EMAIL PROTECTED] wrote: Thanks for the clarrification. After reading through the OpenSceneGraph API docs we definitely require two views. So to summarise 2 monitors (projectors) 1 View on each monitor 1 XScreen, and therefore 1 context (if possible). Yep this would be a sensible set up. With setting up the single context you may need to set the Traits::overrideRedirect to true to prevent the window manage resizing the window to just once physical screen. Then create the graphics context, then when you set the each View's master Camera you just assign the same created graphics context so that both Cameras share things single window. The osgcompositeview has code that shares a single context between multiple views so have a look at it. Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Dual screen support on Linux using TwinView
Hi Robert Thanks for the clarrification. After reading through the OpenSceneGraph API docs we definitely require two views. So to summarise 2 monitors (projectors) 1 View on each monitor 1 XScreen, and therefore 1 context (if possible). Sorry for not giving all this information up front but I have only written about 1/3 of the codebase, so I have to go fishing through the code. I appreciate the help! Thanks Michael On Fri, Nov 21, 2008 at 8:10 PM, Robert Osfield [EMAIL PROTECTED]wrote: HI Michael, Does you two views move together, i.e. they look different directions but as the viewpoint moves around both projector outputs should update relative to this? If this is the case they you have one View but with two slave Cameras each with a project and view offset from the View's master Camera. If two projector outputs are wholly independent w.r.t viewpoint, and require same camera controls such as seprate CameraManipulator then you do have a case which is logically two different views. Robert. On Thu, Nov 20, 2008 at 11:52 PM, Michael [EMAIL PROTECTED] wrote: Hey Robert We have 2 separate logical views (I guess). Essentially we have 2 projectors that can each be placed at any location and orientation in the room and they project onto objects in the room. This is not a tiled display, and we are not worried about overlap. We are also doing some render to texture operations which is why we have different views. Each monitor output is driving a single projector. So, we have 2 projectors and a couple of RTT cameras. The projectors have their own projection and view matrices, but share the same scene graph data for drawing. One of the projectors does shadow removal for the other one, so we need to control the render order. So, we need each monitor output to drive one of our views for the projector, using the 1 graphics context. I appreciate the help (and patience!) Cheers Michael On Thu, Nov 20, 2008 at 7:38 PM, Robert Osfield [EMAIL PROTECTED] wrote: Hi Michael, On Thu, Nov 20, 2008 at 12:09 AM, Michael [EMAIL PROTECTED] wrote: This fails on the second display because OSG can't connect to screen 0:1, because there is only 1 xscreen. Clearly I am doing this wrong, but I'm not sure of the correct way. If you have only only X screen then you'll only be able to open up a window on that one... so you'll need to use the screenNum set to 0 fro both contexts, or Something like this? 1. Create a single GraphicsContext on screen 0, with width=2048 (both displays) 2. Create my views, and somehow tell each one to only render on half of the context? If you a grabbing the whole of both displays I would create a single graphics context that goes across both physical displays. Otherwise you'll need to create two graphics contexts on the same X11 screenNum but with the second window starting at a xpos of 1024. Now what to do about the views depends upon you actual needs. Do you have two separate logical views of doing you have single view that is just made up of two cameras (like looking out of two adjacent real-world windows that share the same view). If you have only single view, then do the two halves of it but up against each other or do they overlap? Could you have a bash at explain what you are specifically trying to achieve as the advice to give is different for all the different cases. Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Dual screen support on Linux using TwinView
HI Michael, Does you two views move together, i.e. they look different directions but as the viewpoint moves around both projector outputs should update relative to this? If this is the case they you have one View but with two slave Cameras each with a project and view offset from the View's master Camera. If two projector outputs are wholly independent w.r.t viewpoint, and require same camera controls such as seprate CameraManipulator then you do have a case which is logically two different views. Robert. On Thu, Nov 20, 2008 at 11:52 PM, Michael [EMAIL PROTECTED] wrote: Hey Robert We have 2 separate logical views (I guess). Essentially we have 2 projectors that can each be placed at any location and orientation in the room and they project onto objects in the room. This is not a tiled display, and we are not worried about overlap. We are also doing some render to texture operations which is why we have different views. Each monitor output is driving a single projector. So, we have 2 projectors and a couple of RTT cameras. The projectors have their own projection and view matrices, but share the same scene graph data for drawing. One of the projectors does shadow removal for the other one, so we need to control the render order. So, we need each monitor output to drive one of our views for the projector, using the 1 graphics context. I appreciate the help (and patience!) Cheers Michael On Thu, Nov 20, 2008 at 7:38 PM, Robert Osfield [EMAIL PROTECTED] wrote: Hi Michael, On Thu, Nov 20, 2008 at 12:09 AM, Michael [EMAIL PROTECTED] wrote: This fails on the second display because OSG can't connect to screen 0:1, because there is only 1 xscreen. Clearly I am doing this wrong, but I'm not sure of the correct way. If you have only only X screen then you'll only be able to open up a window on that one... so you'll need to use the screenNum set to 0 fro both contexts, or Something like this? 1. Create a single GraphicsContext on screen 0, with width=2048 (both displays) 2. Create my views, and somehow tell each one to only render on half of the context? If you a grabbing the whole of both displays I would create a single graphics context that goes across both physical displays. Otherwise you'll need to create two graphics contexts on the same X11 screenNum but with the second window starting at a xpos of 1024. Now what to do about the views depends upon you actual needs. Do you have two separate logical views of doing you have single view that is just made up of two cameras (like looking out of two adjacent real-world windows that share the same view). If you have only single view, then do the two halves of it but up against each other or do they overlap? Could you have a bash at explain what you are specifically trying to achieve as the advice to give is different for all the different cases. Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Dual screen support on Linux using TwinView
Hi Michael, On Thu, Nov 20, 2008 at 12:09 AM, Michael [EMAIL PROTECTED] wrote: This fails on the second display because OSG can't connect to screen 0:1, because there is only 1 xscreen. Clearly I am doing this wrong, but I'm not sure of the correct way. If you have only only X screen then you'll only be able to open up a window on that one... so you'll need to use the screenNum set to 0 fro both contexts, or Something like this? 1. Create a single GraphicsContext on screen 0, with width=2048 (both displays) 2. Create my views, and somehow tell each one to only render on half of the context? If you a grabbing the whole of both displays I would create a single graphics context that goes across both physical displays. Otherwise you'll need to create two graphics contexts on the same X11 screenNum but with the second window starting at a xpos of 1024. Now what to do about the views depends upon you actual needs. Do you have two separate logical views of doing you have single view that is just made up of two cameras (like looking out of two adjacent real-world windows that share the same view). If you have only single view, then do the two halves of it but up against each other or do they overlap? Could you have a bash at explain what you are specifically trying to achieve as the advice to give is different for all the different cases. Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Dual screen support on Linux using TwinView
Hey Robert We have 2 separate logical views (I guess). Essentially we have 2 projectors that can each be placed at any location and orientation in the room and they project onto objects in the room. This is not a tiled display, and we are not worried about overlap. We are also doing some render to texture operations which is why we have different views. Each monitor output is driving a single projector. So, we have 2 projectors and a couple of RTT cameras. The projectors have their own projection and view matrices, but share the same scene graph data for drawing. One of the projectors does shadow removal for the other one, so we need to control the render order. So, we need each monitor output to drive one of our views for the projector, using the 1 graphics context. I appreciate the help (and patience!) Cheers Michael On Thu, Nov 20, 2008 at 7:38 PM, Robert Osfield [EMAIL PROTECTED]wrote: Hi Michael, On Thu, Nov 20, 2008 at 12:09 AM, Michael [EMAIL PROTECTED] wrote: This fails on the second display because OSG can't connect to screen 0:1, because there is only 1 xscreen. Clearly I am doing this wrong, but I'm not sure of the correct way. If you have only only X screen then you'll only be able to open up a window on that one... so you'll need to use the screenNum set to 0 fro both contexts, or Something like this? 1. Create a single GraphicsContext on screen 0, with width=2048 (both displays) 2. Create my views, and somehow tell each one to only render on half of the context? If you a grabbing the whole of both displays I would create a single graphics context that goes across both physical displays. Otherwise you'll need to create two graphics contexts on the same X11 screenNum but with the second window starting at a xpos of 1024. Now what to do about the views depends upon you actual needs. Do you have two separate logical views of doing you have single view that is just made up of two cameras (like looking out of two adjacent real-world windows that share the same view). If you have only single view, then do the two halves of it but up against each other or do they overlap? Could you have a bash at explain what you are specifically trying to achieve as the advice to give is different for all the different cases. Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Dual screen support on Linux using TwinView
Hey Robert
Thanks for the reply. So I've been doing some testing and I'm not sure
exactly how I set this up. Here is some more info on my setup:
xorg.conf:
Section Device
Identifier Device0
Driver nvidia
VendorName NVIDIA Corporation
BoardName GeForce 8600 GT
Option TwinView 1
Option NoLogo true
Option TwinViewXineramaInfoOrder DFP, CRT
Option TwinViewOrientation DFP LeftOf CRT
Option metamodes DFP: 1024x768 +0+0, CRT: 1024x768 +1920+0
EndSection
So, I have two monitors setup using TwinView. Therefore there is a single X
screen with a resolution of 2048x768.
Now, what I would like is essentially 2 full screen windows, one on each
monitor. How do I do this with OpenSceneGraph? Below is the basic code I am
trying:
// our composite viewer
ref_ptrosgViewer::CompositeViewer viewer = new osgViewer::CompositeViewer;
ref_ptrosg::GraphicsContext::Traits traits = new
osg::GraphicsContext::Traits;
// scenegraph root
ref_ptrNode node = new Node();
// do this twice, once for each screen
for (int i=0;i2;i++)
{
// the first view will be on screen 0, the second on screen 1
traits-screenNum = i;
traits-x = 0;
traits-y = 0;
traits-width = 1024;
traits-height = 768;
traits-windowDecoration = false;
traits-doubleBuffer = true;
traits-overrideRedirect = true;
// create the graphics context
osg::ref_ptrosg::GraphicsContext gc =
osg::GraphicsContext::createGraphicsContext(traits.get());
// add the view to our composite viewer
osgViewer::View* v = new osgViewer::View;
v-setSceneData(node);
v-getCamera()-setGraphicsContext(gc.get());
viewer-addView(v);
}
This fails on the second display because OSG can't connect to screen 0:1,
because there is only 1 xscreen. Clearly I am doing this wrong, but I'm not
sure of the correct way. Something like this?
1. Create a single GraphicsContext on screen 0, with width=2048 (both
displays)
2. Create my views, and somehow tell each one to only render on half of the
context?
Any help with this would be greatly appreciated.
Cheers
Michael
On Tue, Nov 18, 2008 at 7:37 PM, Robert Osfield [EMAIL PROTECTED]wrote:
Hi Michael,
The OSG does support two displays attached to a single graphics card,
and will work either with X set up with a separate X screen per
physical display or a single screen spanning both displays. For best
performance it's best to set up a single X screen across both displays
as this will just require the OSG to open up a single graphics
context, which is a far more efficient use of the GPU than opening up
two graphics contexts that content for time and space on the GPU.
Depending upon how you set up the window manager you may find that you
windows are resized automatically to just come up on a single display,
if this happens it's because the window manager is overriding the
window sizes that you ask for when create your graphics context and
the way to solve it is to set the
GaphicsContext::Traits::overrideRedirect to true when creating your
graphics contexts.
Robert.
On Tue, Nov 18, 2008 at 3:06 AM, Michael [EMAIL PROTECTED]
wrote:
Hi
I am developing a program using OpenSceneGraph as the renderer. This
program
needs support for dual screens; I am using composite viewer to setup
different views into the scenegraph, with each view appearing on a
separate
screen (the outputs will be driving projectors).
My X configuration is setup using TwinView; so as far as X is concerned
there is only one screen. Can OpenSceneGraph do what I need to do with
this
configuration (ie get screen info from xinerama) or do I need to
configure X
so that each monitor is on a different Xscreen? I'd rather not
reconfigure X
if possible.
Cheers
Michael Marner
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Re: [osg-users] Dual screen support on Linux using TwinView
I believe you simply have to offset the X and Y locations of your graphic
contexts and leave the screen identifier to 0. The width and height should
be 1024x768 for both contextes.
On Wed, Nov 19, 2008 at 7:09 PM, Michael [EMAIL PROTECTED]wrote:
Hey Robert
Thanks for the reply. So I've been doing some testing and I'm not sure
exactly how I set this up. Here is some more info on my setup:
xorg.conf:
Section Device
Identifier Device0
Driver nvidia
VendorName NVIDIA Corporation
BoardName GeForce 8600 GT
Option TwinView 1
Option NoLogo true
Option TwinViewXineramaInfoOrder DFP, CRT
Option TwinViewOrientation DFP LeftOf CRT
Option metamodes DFP: 1024x768 +0+0, CRT: 1024x768 +1920+0
EndSection
So, I have two monitors setup using TwinView. Therefore there is a single X
screen with a resolution of 2048x768.
Now, what I would like is essentially 2 full screen windows, one on each
monitor. How do I do this with OpenSceneGraph? Below is the basic code I am
trying:
// our composite viewer
ref_ptrosgViewer::CompositeViewer viewer = new
osgViewer::CompositeViewer;
ref_ptrosg::GraphicsContext::Traits traits = new
osg::GraphicsContext::Traits;
// scenegraph root
ref_ptrNode node = new Node();
// do this twice, once for each screen
for (int i=0;i2;i++)
{
// the first view will be on screen 0, the second on screen 1
traits-screenNum = i;
traits-x = 0;
traits-y = 0;
traits-width = 1024;
traits-height = 768;
traits-windowDecoration = false;
traits-doubleBuffer = true;
traits-overrideRedirect = true;
// create the graphics context
osg::ref_ptrosg::GraphicsContext gc =
osg::GraphicsContext::createGraphicsContext(traits.get());
// add the view to our composite viewer
osgViewer::View* v = new osgViewer::View;
v-setSceneData(node);
v-getCamera()-setGraphicsContext(gc.get());
viewer-addView(v);
}
This fails on the second display because OSG can't connect to screen 0:1,
because there is only 1 xscreen. Clearly I am doing this wrong, but I'm not
sure of the correct way. Something like this?
1. Create a single GraphicsContext on screen 0, with width=2048 (both
displays)
2. Create my views, and somehow tell each one to only render on half of the
context?
Any help with this would be greatly appreciated.
Cheers
Michael
On Tue, Nov 18, 2008 at 7:37 PM, Robert Osfield [EMAIL PROTECTED]wrote:
Hi Michael,
The OSG does support two displays attached to a single graphics card,
and will work either with X set up with a separate X screen per
physical display or a single screen spanning both displays. For best
performance it's best to set up a single X screen across both displays
as this will just require the OSG to open up a single graphics
context, which is a far more efficient use of the GPU than opening up
two graphics contexts that content for time and space on the GPU.
Depending upon how you set up the window manager you may find that you
windows are resized automatically to just come up on a single display,
if this happens it's because the window manager is overriding the
window sizes that you ask for when create your graphics context and
the way to solve it is to set the
GaphicsContext::Traits::overrideRedirect to true when creating your
graphics contexts.
Robert.
On Tue, Nov 18, 2008 at 3:06 AM, Michael [EMAIL PROTECTED]
wrote:
Hi
I am developing a program using OpenSceneGraph as the renderer. This
program
needs support for dual screens; I am using composite viewer to setup
different views into the scenegraph, with each view appearing on a
separate
screen (the outputs will be driving projectors).
My X configuration is setup using TwinView; so as far as X is concerned
there is only one screen. Can OpenSceneGraph do what I need to do with
this
configuration (ie get screen info from xinerama) or do I need to
configure X
so that each monitor is on a different Xscreen? I'd rather not
reconfigure X
if possible.
Cheers
Michael Marner
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Re: [osg-users] Dual screen support on Linux using TwinView
Hi Michael, The OSG does support two displays attached to a single graphics card, and will work either with X set up with a separate X screen per physical display or a single screen spanning both displays. For best performance it's best to set up a single X screen across both displays as this will just require the OSG to open up a single graphics context, which is a far more efficient use of the GPU than opening up two graphics contexts that content for time and space on the GPU. Depending upon how you set up the window manager you may find that you windows are resized automatically to just come up on a single display, if this happens it's because the window manager is overriding the window sizes that you ask for when create your graphics context and the way to solve it is to set the GaphicsContext::Traits::overrideRedirect to true when creating your graphics contexts. Robert. On Tue, Nov 18, 2008 at 3:06 AM, Michael [EMAIL PROTECTED] wrote: Hi I am developing a program using OpenSceneGraph as the renderer. This program needs support for dual screens; I am using composite viewer to setup different views into the scenegraph, with each view appearing on a separate screen (the outputs will be driving projectors). My X configuration is setup using TwinView; so as far as X is concerned there is only one screen. Can OpenSceneGraph do what I need to do with this configuration (ie get screen info from xinerama) or do I need to configure X so that each monitor is on a different Xscreen? I'd rather not reconfigure X if possible. Cheers Michael Marner ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] Dual screen support on Linux using TwinView
Hi I am developing a program using OpenSceneGraph as the renderer. This program needs support for dual screens; I am using composite viewer to setup different views into the scenegraph, with each view appearing on a separate screen (the outputs will be driving projectors). My X configuration is setup using TwinView; so as far as X is concerned there is only one screen. Can OpenSceneGraph do what I need to do with this configuration (ie get screen info from xinerama) or do I need to configure X so that each monitor is on a different Xscreen? I'd rather not reconfigure X if possible. Cheers Michael Marner ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
