Re: [osg-users] Controlling swap (Not the question about View vs. Composite View)
Are there examples for doing these techniques? Ed Robert Osfield wrote: You can add your own sync code if you want into camera initial/pre,post and final callbacks, and no matter what threading model these will be called. You can also add Rendering operations into the GraphicsContext's operations list, or override the osgViewer::Renderer which does the actual cull and draw traversals. Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Controlling swap (Not the question about View vs. Composite View)
On Tue, Nov 11, 2008 at 2:42 PM, Ed [EMAIL PROTECTED] wrote: Are there examples for doing these techniques? Search tools are your friend, the sooner you get used to use them on the OSG the sooner I can get on with useful stuff. Just search for setPostDraw or setFinalDraw in the OpenSceneGraph distribution it'll come up with all the examples. Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] controlling swap
Hi Ed, I wrote about this exact topic a couple of weeks back, so go have look through the archives on this discussion. The short story is that I moving between the two is not difficult, and I'd start with the easier of the two viewers's - osgViewer::Viewer but learn a bit about CompisteViewer too so you know roughly what you might need to change later. Robert. On Mon, Nov 10, 2008 at 3:34 AM, Ed [EMAIL PROTECTED] wrote: After reading osgViewer::Viewer vs osgViewer::CompositeViewer, I think I might need to use CompositeViewer at some point in the future of my project, but not at the outset. Should I begin with the CompositeViewer, or make the necessary mods later? How difficult is it to change from Viewer to CompositeViewer later? Ed ___ 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] controlling swap
I think the discussion you refer to was initiated by my question then too. I am not sure how this question ended up in this email... I was copying and pasting and something went wrong, but the subject line indicates what the topic was meant to be. I have resubmitted the correct question. Ed Robert Osfield wrote: Hi Ed, I wrote about this exact topic a couple of weeks back, so go have look through the archives on this discussion. The short story is that I moving between the two is not difficult, and I'd start with the easier of the two viewers's - osgViewer::Viewer but learn a bit about CompisteViewer too so you know roughly what you might need to change later. Robert. On Mon, Nov 10, 2008 at 3:34 AM, Ed [EMAIL PROTECTED] wrote: After reading osgViewer::Viewer vs osgViewer::CompositeViewer, I think I might need to use CompositeViewer at some point in the future of my project, but not at the outset. Should I begin with the CompositeViewer, or make the necessary mods later? How difficult is it to change from Viewer to CompositeViewer later? Ed ___ 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] Controlling swap (Not the question about View vs. Composite View)
In the Viewer examples I have seen, it appears that the rendering is initiated by calling viewer.run(). In my code I am implementing hardware based synchronization amonst multiple renderers and I need to control the render or draw, as well as the swap. How do I get this control? Do I use draw traversals? Are there examples of this? Also under what situations would I want to use cull and update traversals? Examples of these? Ed ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Controlling swap (Not the question about View vs. Composite View)
Hi Ed,
The examples are written to be focus primarily on the feature they
demonstrate so a rather minimal in terms of viewer code, viewer.run()
being a helper function that wraps up the whole rendering. Have a
look at the implementation of run() and you'll find essentially:
if (!viewer.isRealize()) viewer.realize();
while(!viewer.done())
{
viewer.frame();
}
Now viewer frame() in term is basically another help function that
wraps up the traversals, so you can rewrite in your own app:
while(!viewer.done())
{
viewer.advance();
viewer.updateTraversal();
viewer.eventTraversal());
viewer.renderingTraversals();
}
The cull and draw are all wrapped up in the renderingTraversal()
method that dispatches the traversals when running single threaded or
coordinates the blocks/barriers required by each of the threading
models.
You can subclass from rendreinTraversals() if you so wished but most
of the time this will be unnecessary. You can add your own sync code
if you want into camera initial/pre,post and final callbacks, and no
matter what threading model these will be called. You can also add
Rendering operations into the GraphicsContext's operations list, or
override the osgViewer::Renderer which does the actual cull and draw
traversals.
Robert.
On Mon, Nov 10, 2008 at 2:29 PM, Ed [EMAIL PROTECTED] wrote:
In the Viewer examples I have seen, it appears that the rendering is
initiated by calling viewer.run().
In my code I am implementing hardware based synchronization amonst multiple
renderers and I need to control the render or draw, as well as the swap.
How do I get this control? Do I use draw traversals? Are there examples
of this? Also under what situations would I want to use cull and update
traversals? Examples of these?
Ed
___
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] controlling swap
Hi Ed, After reading osgViewer::Viewer vs osgViewer::CompositeViewer, I think I might need to use CompositeViewer at some point in the future of my project, but not at the outset. Should I begin with the CompositeViewer, or make the necessary mods later? How difficult is it to change from Viewer to CompositeViewer later? If I remember correctly, at the end of that very thread it was mentioned that the switch is not hard at all. However, using CompositeViewer is not that much overhead over Viewer, so if you will need it for sure I would start out with CompositeViewer at the start, so that everything is already there and you don't have any surprises. Just my opinion, mind you. J-S -- __ Jean-Sebastien Guay[EMAIL PROTECTED] http://www.cm-labs.com/ http://whitestar02.webhop.org/ ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] controlling swap
After reading osgViewer::Viewer vs osgViewer::CompositeViewer, I think I might need to use CompositeViewer at some point in the future of my project, but not at the outset. Should I begin with the CompositeViewer, or make the necessary mods later? How difficult is it to change from Viewer to CompositeViewer later? Ed ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] controlling swap
Hi Ed, I would also recommend to use osgViewer::CompositeViewer from the starting. The reason is that osgViewer::Viewer can be mimicked by osgViewer::CompositeViewer containing a single osgViewer::View RJ Jean-Sébastien Guay wrote: Hi Ed, After reading osgViewer::Viewer vs osgViewer::CompositeViewer, I think I might need to use CompositeViewer at some point in the future of my project, but not at the outset. Should I begin with the CompositeViewer, or make the necessary mods later? How difficult is it to change from Viewer to CompositeViewer later? If I remember correctly, at the end of that very thread it was mentioned that the switch is not hard at all. However, using CompositeViewer is not that much overhead over Viewer, so if you will need it for sure I would start out with CompositeViewer at the start, so that everything is already there and you don't have any surprises. Just my opinion, mind you. J-S ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
