Re: [osg-users] Lets slowly update extension gl symbols to latest OpenGL specification with each submission.
Hi Paul, On Fri, Feb 5, 2010 at 8:43 PM, Paul Martz pma...@skew-matrix.com wrote: 2) Centralized management of extensions via external libs doesn't fit well with the ability to extend the OSG in 3rd party NodeKits, where the NodeKits support extensions that that the OSG version didn't support when shipped - these 3rd party NodeKits would be forced to only use the same version of the extension library that the OSG was linked to. This is really not an issue. We discussed something similar to this in OpenGL capture/logging in OSG and I'll paraphrase what I said there: External node kit developers can cook their own extension access solution until the extension is available (in core OSG or OSG's external feature support dependency). If the external node kit developers have to cook up their own extensions then we really aren't any further forward in try to unify things. What happens if we merge the 3rd party nodekits with the core OSG? Do we then convert across? The better solution is to make sure that we have an extensions system that is easily extensible. A completely centralized system doesn't achieve this. 3) We need to be able to disable extensions when they don't work. (I'd question whether or not this feature even works in OSG today, given that OSG doesn't even query the extension string for many of the extension features it uses. But...) This is an interesting and possibly useful feature, so it should definitely be in any solution that you endorse before we start coding a submission. And finally regarding the dependency issue. It doesn't have to be a dependency any more than OpenThreads is a dependency. It could be an internal self-contained module. I know, I know, you're opposed to centralizing this. :-) An external dependency even if compiled part of the core OSG is still problematic as I said in my earlier post. Such an approach will not be merged with the core OSG as it's a backward step in too many areas. This doesn't preclude us for coming up with a better way of organizing extensions. Whatever system we come up with it has extensionble, a GL extension system that itself it's extensible rather defeats the whole point of GL extensions. Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Questions about physic engines.
Hi Ricardo, sorry to not go into the details - so just few hints from my friend that is going his project on ODE+OSG. He done the integration like this: - he loads the scene by OSG - he converts the scene geometry to ODE geometry and sends it to ODE by ODE functions - he setups the ODE world - he starts the ODE simulation - each frame, he reads all required transformations from ODE and updates OSG transformations (ODE simulation is applied to OSG scene) Concerning your questions: - sorry, I have no knowledge about osgPhysics - friction, mass, etc. - it is always a little bit tricky to put additional information to the file (3ds, collada) if the format is not designed to carry this information. However, number of formats supports additional text info connected to a scene graph node. Maybe, this will be the way. My friend is setting this information inside his code after loading each particular scene object. It is easy solution for the starting... - simulation steps: yes, you need to do the simulation steps and then render. It sometimes happens that you are doing number of simulation steps per one rendering step. That is not a problem. But sorry, I did not know implementation details. You will need to take a look to doc and tutorials. Sorry, no more knowledge on my side, but hopefully, it helps a little bit, John Ricardo Ruiz wrote: Hi mates. I have several questions regarding about physics engines in OSG. BTW, I'm a OSG beginner. If I want to use ODE, must I add osgPhysics plugin to my OSG? How can I load a scene with physics values? Let's say I'm creating a scene in 3Ds MAX, and I export it to COLLADA (or any other format). Does OSG or osgPhysics read these values (mass, friction...)? And the most important, how can I tell 3Ds MAX that objets have different physic properties? And the last one. Usually physics engines requere a fixed (or almost) time step, ODE is one of them. How should I manage that inside OSG, I mean, after integrating ODE with ODE? Thank you very much for your time and help. Cheers, Ricardo -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=23771#23771 ___ 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] First attempt at OpenSceneGraph Programming.....
Thanks for the reply. I dont think it is a class problem because when i try the following in a command prompt window: Code: ECHO %OSG_BIN_PATH% ECHO %OSG_INCLUDE_PATH% ECHO %OSG_LIB_PATH% ECHO %OSG_SAMPLES_PATH% ECHO %OSG_FILE_PATH% The correct locations are shown, i think then its just that VS2008 cannot seem to see my OSG/bin folder which is where the osg55-osgd.dll file is. -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=23774#23774 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] First attempt at OpenSceneGraph Programming.....
Thank you very much for your reply, i compiled the program and below is the output and it looks like the PATH is setup: Code: PATH = C:\PHP\;C:\Ruby\bin;C:\Python\Scripts;C:\Python\;C:\Perl\site\bin;C:\Perl\bin;C:\OpenSceneGraph\bin;C:\OpenSceneGraph\share\OpenSceneGraph\bin;C:\OpenSceneGraph\Samples; OSG_INCLUDE_PATH = C:\OpenSceneGraph\include OSG_LIB_PATH = C:\OpenSceneGraph\lib Must just be VS2008 then. No worries, i'll just have to start the programs manually after I have compiled them. Thanks for the input, Much appreciated. -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=23777#23777 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Displaying elevation values while navigating terrain elevation files
On 2/6/2010 11:33 PM, Phanindra Talabathula wrote: Hi Chris, Is it also possible to display latitude, longitude along with elevation values as the user tries to navigate/fly thro' the terrain elevation file in osgviewer? It isn't in the basic osgViewer. in the past I've hacked osgviewer's stats display to have those coordinates displayed, but I don't know if I have that code handy right now. Regards, Phanindra -- Chris 'Xenon' Hanson, omo sanza lettere Xenon AlphaPixel.com PixelSense Landsat processing now available! http://www.alphapixel.com/demos/ There is no Truth. There is only Perception. To Perceive is to Exist. - Xen ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Scientific Visualization classes?
Hi Andrew, we have used OSG and VTK together in some data visualization projects. We don't use any black magic in combining the two, but our software might contain some handy code that is usable for your purposes. The software (Virtual Reality eXplorer (VRX) and VRmeer Library Open Source Edition) can be downloaded here: http://graphics.tudelft.nl/VRmeer I'd love to discuss dataviz stuff on OSG, so do contact me if you have ideas on combining the two. Gerwin On Tue, Feb 2, 2010 at 8:12 PM, Andrew Cunningham o...@a-cunningham.com wrote: I was looking for some SciVis classes for OSG, along the lines of VTK's very rich collection? It is possible to use use VTK as a visualization engine to prepare data for OSG (vtkActorToOSG), and I am prepared to go that way, but that is not particularly efficient in memory and speed as data has to be translated both ways. I evaluated using either VTK and OSG for a project , but found the VTK scene graph implementation is, in my experience, poorly implemented, and performance is not good once a scene graph gets more than a few levels deep. VTK's abstraction from the underlying graphics API also hurts performance. One of my test cases showed a 20x performance hit over OSG. Andrew -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=23553#23553 ___ 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] node names not preserved going from flt to ive/osg
Greetings, I am having difficulty keeping the node names preserved from open flight files (OpenFlight 15.x vintage, I believe) when converted to ive or osg, using osgconv.exe. Essentially, the files have a few LOD nodes with different named, group nodes underneath each of them. Almost all the node names I see in the ive file (or osg file) are no longer preserved, when I examine them within my node visitor in the debugger. When I load the OpenFlight file instead, it is exactly as expected. Is this a common problem, and if so, recommendations on a work-around would be very much appreciated. Loading ive is preferable. thanks all, ted ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Example of geographical position
Hi Shayne, Excuse my newbie status so how do I set up the MatrixTransform do I just use the latitude, longitude and altitude as a translation or do I just set the position of my vehicle using the latitude, longitude to set the position of the vehicle some how. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] node names not preserved going from flt to ive/osg
First, make sure you disable the Optimizer with OSG_OPTIMIZER=OFF before you run osgconv. The REMOVE_REDUNDANT_NODES flag might be the cause of this behavior. Also, check the FLT plugin documentation for tips. Two sources of info: osgconv --format flt or: http://www.openscenegraph.org/projects/osg/wiki/Support/KnowledgeBase/OpenFlight From that info, it looks you might want to consider using the preserveFace and preserveObject options. If you still experience this issue, it might have something to do with the way FLT LOD nodes map to OSG nodes. Watch what happens under a debugger to see what's going on. Paul Martz Skew Matrix Software LLC _http://www.skew-matrix.com_ http://www.skew-matrix.com/ +1 303 859 9466 ted morris wrote: I am having difficulty keeping the node names preserved from open flight files (OpenFlight 15.x vintage, I believe) when converted to ive or osg, using osgconv.exe. Essentially, the files have a few LOD nodes with different named, group nodes underneath each of them. Almost all the node names I see in the ive file (or osg file) are no longer preserved, when I examine them within my node visitor in the debugger. When I load the OpenFlight file instead, it is exactly as expected. Is this a common problem, and if so, recommendations on a work-around would be very much appreciated. Loading ive is preferable. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Displaying elevation values while navigating terrain elevation files
Hi Chris, If you could give me some inputs on how you could hack/tweak the code to get the co-ordinates and elevation displayed, I shall try it out. Thanks for the help in advance . Regards, Phanindra -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=23790#23790 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] node names not preserved going from flt to ive/osg
I found this issue on my end too. Might be good if we put the optimize as an option to osgconv, instead of disabling it by the env -Nick On Mon, Feb 8, 2010 at 5:26 AM, Paul Martz pma...@skew-matrix.com wrote: First, make sure you disable the Optimizer with OSG_OPTIMIZER=OFF before you run osgconv. The REMOVE_REDUNDANT_NODES flag might be the cause of this behavior. Also, check the FLT plugin documentation for tips. Two sources of info: osgconv --format flt or: http://www.openscenegraph.org/projects/osg/wiki/Support/KnowledgeBase/OpenFlight From that info, it looks you might want to consider using the preserveFace and preserveObject options. If you still experience this issue, it might have something to do with the way FLT LOD nodes map to OSG nodes. Watch what happens under a debugger to see what's going on. Paul Martz Skew Matrix Software LLC _http://www.skew-matrix.com_ http://www.skew-matrix.com/ +1 303 859 9466 ted morris wrote: I am having difficulty keeping the node names preserved from open flight files (OpenFlight 15.x vintage, I believe) when converted to ive or osg, using osgconv.exe. Essentially, the files have a few LOD nodes with different named, group nodes underneath each of them. Almost all the node names I see in the ive file (or osg file) are no longer preserved, when I examine them within my node visitor in the debugger. When I load the OpenFlight file instead, it is exactly as expected. Is this a common problem, and if so, recommendations on a work-around would be very much appreciated. Loading ive is preferable. ___ 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
