Re: [osg-users] Linking error : OpenThread
Hi, On Thursday 04 September 2008 23:23, Rahul Jain wrote: While compiling my application with OSG2.6 I am getting following linking error *undefined reference to `OpenThreads::Atomic::operator--()*. The same application is linked properly with OSG2.4. Since i am not using Atomic operation in my application, i am not able to find the reason for failure.Any guesses ? May be you need to link your application to libOpenThreads also? You use the Atomic stuff when you have any ref_ptr inline in your code ... Greetings Mathias -- Dr. Mathias Fröhlich, science + computing ag, Software Solutions Hagellocher Weg 71-75, D-72070 Tuebingen, Germany Phone: +49 7071 9457-268, Fax: +49 7071 9457-511 -- Vorstand/Board of Management: Dr. Bernd Finkbeiner, Dr. Florian Geyer, Dr. Roland Niemeier, Dr. Arno Steitz, Dr. Ingrid Zech Vorsitzender des Aufsichtsrats/ Chairman of the Supervisory Board: Prof. Dr. Hanns Ruder Sitz/Registered Office: Tuebingen Registergericht/Registration Court: Stuttgart Registernummer/Commercial Register No.: HRB 382196 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] osgmultiplerendertargets
Hi, no, you don't need cmline args. With just the command you should see a yellow square. I have not compiled 2.6. I have 2.5.3 here and it works (Debian Sid, NVidia 7400 Go). You could also try: osgmultiplerendertargets --image and osgmultiplerendertargets --hdr but they prob won't work if the simple one does not. I know there have been some changes wrt multisample FBO's, not sure if that could cause trouble. I'm also not sure if there are proper checking for MRT capabilities in the example. The example assumes it can use 4 render targets. jp [EMAIL PROTECTED] wrote: I'm getting a segmentation fault when running the osgmultiplerendertargets example using OSG 2.6 under Linux.The call stack says its in RenderStage::runCameraSetUp. My OSG isn't currently compiled debug. Am I doing something wrong? Do I need command line arguments? Paul P ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org -- This message is subject to the CSIR's copyright terms and conditions, e-mail legal notice, and implemented Open Document Format (ODF) standard. The full disclaimer details can be found at http://www.csir.co.za/disclaimer.html. This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. MailScanner thanks Transtec Computers for their support. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] adaptation of chunkLOD to OSG
Just a little remark: isn't the cockpit supposed to read FUEL FLOW instead of FLUEL FLOW? :) originally someone did a test with photo realistic terrain. video (40s): High resolution (26 Mo) http://documents.cigognes.net/csp/csp-terrain-photo.avi Low resolution (YouTube) http://fr.youtube.com/watch?v=1NlZoylXrlo ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Using Kd-tree for spatial data
Hi, it's already done for you. Just use the osg::KdTreeBuilder visitor on the subgraph you want to be split with kd-trees. Alberto El Jueves 04 Septiembre 2008ES 19:15:21 maruti borker escribió: Thanks for pointing out , i looked into the discussion and i think the current setupd with kd-trees wont help me with my idea. Can anyone point me to some tool/project which creates just the kd-tree ( near to optimal ) given a 3d scene . Any help would be appreciated. Thanks Maruti Borker IIIT Hyderabad Website:- http://students.iiit.ac.in/~maruti Blog:- http://marutiborker.wordpress.com On Thu, Sep 4, 2008 at 3:00 PM, Robert Osfield [EMAIL PROTECTED]wrote: HI Maruti, Lots was discussed on osg-users about the KdTree implementation in the OSG when I intergrated the functionality, so have a look through the osg-users archives in June and July. The quick answer is that KdTree's hang off Drawables, and when do intersection testing first coarsed grained culling is done by the scene graphs hierachy of bounding spheres/boxes, then finally fine grained testing is done against the KdTree hanging of the drawables. Robert. On Thu, Sep 4, 2008 at 7:27 AM, maruti borker [EMAIL PROTECTED] wrote: Hello, I was amazed to see the development OSG has made, the last version i used it was 2.3.4. Coming to the topic, i wanted to know how a scenegraph was being linked to a kd-tree for finding out intersections. I am thinking of an application which needs querying of spatial data, for which i thought of using kd-trees , but i also thought of having a scenegraph for rendering purposes. I looked at a work Razor: Multi-resolution ray tracing for dynamic environments by William mark and Warren hunt. They also lazily linked a scene-graoh and a kd-tree. I wanted to know how the kd-tree is being linked to a scenegraph in OSG and also whether i could actually access the kd-tree for performing algorithms on top of it. And also an advice whether using this linkage in OSG is useful for storing spatial data. Do mail back incase of any doubts or clarifications . Maruti Borker IIIT Hyderabad Website:- http://students.iiit.ac.in/~marutihttp://students.iiit.ac.in/%7Emaruti Blog:- http://marutiborker.wordpress.com ___ 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] adaptation of chunkLOD to OSG
LOL, yes you are right, i never saw that. thank you for finding the failure. :) Alberto Luaces wrote: Just a little remark: isn't the cockpit supposed to read FUEL FLOW instead of FLUEL FLOW? :) originally someone did a test with photo realistic terrain. video (40s): High resolution (26 Mo) http://documents.cigognes.net/csp/csp-terrain-photo.avi Low resolution (YouTube) http://fr.youtube.com/watch?v=1NlZoylXrlo ___ 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] osgFX::BumpMapping
Hi Alex, I'm afraid you'll need to move to the dev release 2.7.2 or svn/trunk to get .ive support for osgFX::BumpMapping. Robert. On Thu, Sep 4, 2008 at 10:48 PM, Pecoraro, Alexander N [EMAIL PROTECTED] wrote: Is it possible to write osgFX::BumpMapping nodes to an ive file? I noticed in OSG 2.4 and 2.5 there seems to be some code for writing it to .osg, but not .ive. I also noticed that in the OSG trunk on SVN there appears to be some code for writing it to ive, but I was hoping to be able to use a released version. I figured since it appears the osgFX::BumpMapping just uses built in OSG nodes that it would be able to write out the OSG nodes that are created by osgFX::BumpMapping. Is that the case? Thanks. Alex ___ 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] Using Kd-tree for spatial data
But when i went through the discussion, i found out that only geomety in the leaves have seperate kd-tree and not a single kd-tree for the whole scene. Correct me if i am wrong. Maruti Borker IIIT Hyderabad Website:- http://students.iiit.ac.in/~maruti Blog:- http://marutiborker.wordpress.com On Fri, Sep 5, 2008 at 1:10 PM, Alberto Luaces [EMAIL PROTECTED] wrote: Hi, it's already done for you. Just use the osg::KdTreeBuilder visitor on the subgraph you want to be split with kd-trees. Alberto El Jueves 04 Septiembre 2008ES 19:15:21 maruti borker escribió: Thanks for pointing out , i looked into the discussion and i think the current setupd with kd-trees wont help me with my idea. Can anyone point me to some tool/project which creates just the kd-tree ( near to optimal ) given a 3d scene . Any help would be appreciated. Thanks Maruti Borker IIIT Hyderabad Website:- http://students.iiit.ac.in/~marutihttp://students.iiit.ac.in/%7Emaruti Blog:- http://marutiborker.wordpress.com On Thu, Sep 4, 2008 at 3:00 PM, Robert Osfield [EMAIL PROTECTED]wrote: HI Maruti, Lots was discussed on osg-users about the KdTree implementation in the OSG when I intergrated the functionality, so have a look through the osg-users archives in June and July. The quick answer is that KdTree's hang off Drawables, and when do intersection testing first coarsed grained culling is done by the scene graphs hierachy of bounding spheres/boxes, then finally fine grained testing is done against the KdTree hanging of the drawables. Robert. On Thu, Sep 4, 2008 at 7:27 AM, maruti borker [EMAIL PROTECTED] wrote: Hello, I was amazed to see the development OSG has made, the last version i used it was 2.3.4. Coming to the topic, i wanted to know how a scenegraph was being linked to a kd-tree for finding out intersections. I am thinking of an application which needs querying of spatial data, for which i thought of using kd-trees , but i also thought of having a scenegraph for rendering purposes. I looked at a work Razor: Multi-resolution ray tracing for dynamic environments by William mark and Warren hunt. They also lazily linked a scene-graoh and a kd-tree. I wanted to know how the kd-tree is being linked to a scenegraph in OSG and also whether i could actually access the kd-tree for performing algorithms on top of it. And also an advice whether using this linkage in OSG is useful for storing spatial data. Do mail back incase of any doubts or clarifications . Maruti Borker IIIT Hyderabad Website:- http://students.iiit.ac.in/~marutihttp://students.iiit.ac.in/%7Emaruti http://students.iiit.ac.in/%7Emaruti Blog:- http://marutiborker.wordpress.com ___ 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] Movie texture on poly
Hi Patrick, I presume you have quicktime installed and compiled the OSG's qt plugin on on your system, you make may no mention if you've done this or if what system you are working on. Quicktime is requied for Mpeg4 files, but only available under OSX and Windows. Under Linux you'll need to to you the xine-lib plugin, but xine-lib doesn't yet support mpeg4 as far as I'm aware. Robert. On Fri, Sep 5, 2008 at 1:26 AM, Patrick A. Webb [EMAIL PROTECTED] wrote: Hello, I'm trying to use osgviewer to display some models created in Blender, and use animated textures (MPEG4 movies or even animated GIFs) on those models. I've read through the archives and found mention of replacing the texture file name in the .osg file with the name of the movie that's going to be the animated texture, but I've had no luck getting the texture to actually animate. Does anyone have an example .osg file and an associated movie that worktogether to play an animated texture on a polygon? Thanks in advance for any help. -Patrick Webb ___ 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] VPB using shoreline / borders vector data to determine alpha
Hi Ralf, Doing this is feasible, but it's quite a bit of work, and certainly not something that will be in the VPB-1.0 release. Longer term I'd like to see osgTerrain supporting boundary polygons, and runtime tessellation against these, then VPB would then just need to cut the boundaries up into tiles and then export them with the tiles and leave the tessllation up to osgTerrain. Robert. On Fri, Sep 5, 2008 at 6:33 AM, Ralf Stokholm [EMAIL PROTECTED] wrote: Hi Robert /List Would an option to use a shapefile containing ie. water bodies or borders to set the transparency of a terrain layer be feaseble? For my application it would be nice to use border vector data to eleminate data from one dataset and blend into another. It should also be relatively easy to extend a terrain with some nice looking ocean effects if the terrain would simply alphablen into the warter surface as determined by a shoreline shapefile? What are your thourghts on this? Brgs. Ralf Stokholm ___ 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] osgmultiplerendertargets
Hi Paul, I have just tried osgmultiplerendertargets on my quad core system and it runs fine (svn/trunk) but there has been no fixes since 2.6 that would effects things. What hardware/OS setup do you have? Robert. On Thu, Sep 4, 2008 at 6:35 PM, [EMAIL PROTECTED] wrote: I'm getting a segmentation fault when running the osgmultiplerendertargets example using OSG 2.6 under Linux.The call stack says its in RenderStage::runCameraSetUp. My OSG isn't currently compiled debug. Am I doing something wrong? Do I need command line arguments? Paul P ___ 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] Using Kd-tree for spatial data
HI Maruti, On Fri, Sep 5, 2008 at 9:11 AM, maruti borker [EMAIL PROTECTED] wrote: But when i went through the discussion, i found out that only geomety in the leaves have seperate kd-tree and not a single kd-tree for the whole scene. Correct me if i am wrong. The use of KdTree on drawable leaves only is done to provide a good balance between efficiency of intersection test and flexibility. For instance the system we have now handles whole scene with moving parts, if you had a single KdTree you'd need to recompute it all the time. Also a well balanced scene graph will be spatially distributed so will the hierarchical bounding volumes that help intersection tests. Jumping to KdTree for the whole scene graph is technically possible, but you'll need to build the KdTree yourself, and in terms of performance vs flexibility tradeoff's is not good, it's a lot of effort for little gain in performance. Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] adaptation of chunkLOD to OSG
Hi Hannes, On Thu, Sep 4, 2008 at 8:36 PM, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: with VirtualPlanetBuilder you mean http://www.openscenegraph.org/projects/VirtualPlanetBuilder with VTP you mean http://www.vterrain.org/ i did not find anything about VTB, is it a mistyped VTP? It's a typo - VTB should be VPB i.e. VirtualPlanetBuilder. Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Using Kd-tree for spatial data
Hi , I understood your point. That is why i said that the kd-tree implemented in OSG wont be useful for my purpose. I just wanted to know if there are any tools/code which creates a single kd-tree of the whole scene. Regards, Maruti Borker IIIT Hyderabad Website:- http://students.iiit.ac.in/~maruti Blog:- http://marutiborker.wordpress.com On Fri, Sep 5, 2008 at 1:52 PM, Robert Osfield [EMAIL PROTECTED]wrote: HI Maruti, On Fri, Sep 5, 2008 at 9:11 AM, maruti borker [EMAIL PROTECTED] wrote: But when i went through the discussion, i found out that only geomety in the leaves have seperate kd-tree and not a single kd-tree for the whole scene. Correct me if i am wrong. The use of KdTree on drawable leaves only is done to provide a good balance between efficiency of intersection test and flexibility. For instance the system we have now handles whole scene with moving parts, if you had a single KdTree you'd need to recompute it all the time. Also a well balanced scene graph will be spatially distributed so will the hierarchical bounding volumes that help intersection tests. Jumping to KdTree for the whole scene graph is technically possible, but you'll need to build the KdTree yourself, and in terms of performance vs flexibility tradeoff's is not good, it's a lot of effort for little gain in performance. 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] scene graph access in multithreaded mode
Hi Robert, Hi Tugkan, On Wed, Sep 3, 2008 at 9:56 AM, Tugkan Calapoglu [EMAIL PROTECTED] wrote: I am porting an application from OSG0.99 to latest SVN version. Wow, climb aboard the time machine :-) I know :). We never had the time slot for the upgrade until now. I have implemented the changes you suggested and it seems to work, no random crashed anymore in CullThreadPerCameraDrawThreadPerContext mode. Thanks for the help, tugkan I have two questions (both for CullThreadPerCameraDrawThreadPerContext mode): 1- Is it safe to make changes in the scene graph outside the frame call (without using update etc. callbacks )? Or is the only place where we have safe scene graph acess is inside a callback? Mailing list and source code reading made me think that outside the frame() should be safe but I am getting some crashes. Before delving into my own code I'd like that someone confirms this. Modifying the scene graph outside of the frame call is safe in SingleThreader, and CullDrawThreadPerCamera threading models as they don't leave any threads active after the end of the renderingTraversals() method (called from frame()). With DrawThreadPerContext and CullThreadPerCamewraDrawThreadPerContext the draw threads will still be active on completion of the renderingTraversals(), so if you modifying drawables and state that the thread is still reading from in the draw traversal you will end up with problems - and potential crashes. There is a standard mechanism to deal with this issue - and that is the renderingTraversals() method to block till all dynamic objects in the draw traversals have been dispatched. The way you tell the draw traversal that an drawable or stateset will be modified dynamically is to set its data variance to DYNAMIC. drawable-setDataVariance(osg::Object::DYNAMIC); stateset-setDataVariance(osg::Object::DYNAMIC); This is mentioned in the Quick Start Guide book, as well as many times on the osg-users mailing list so have a look through the archives if you want more background reading. 2- Is it ok to change the global state set during rendering outside frame call? I have following code runing before frame() is called : osg::Camera* cam = getViewer()-getView(i)-getCamera(); cam-getOrCreateStateSet()-clear(); cam-getOrCreateStateSet()-setGlobalDefaults(); ... And some other changes ... Same requirement - if you are modifying the stateset then you'll need to set its data variance to DYNAMIC. For a StateSet that decorates the whole scene graph you'll end you holding back the frame till the whole scene graph is completed, so it won't have any performance advantage over CullDrawThreadPerContext. You can double buffer objects to allow you to retain the STATIC data variance and keep the threads overlapping, to do this you do: osg::Camera* cam = getViewer()-getView(i)-getCamera(); cam-setStateSet() = new StateSet; // this is where we just use a new StateSet rather than modify the previous one cam-getOrCreateStateSet()-setGlobalDefaults(); ... And some other changes ... The draw traversal takes a reference to the StateSet and Drawables so it's safe to go an remove them from the scene graph outside the frame() call, this isn't something makes then dynamic so you won't need to set their data variance to DYNAMIC. Robert. Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org -- Tugkan Calapoglu - VIRES Simulationstechnologie GmbH Oberaustrasse 34 83026 Rosenheim Germany phone+49.8031.463641 fax +49.8031.463645 email[EMAIL PROTECTED] internet www.vires.com - Sitz der Gesellschaft: Rosenheim Handelsregister Traunstein HRB 10410 Geschaeftsfuehrer: Marius Dupuis Wunibald Karl - ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Using Kd-tree for spatial data
Hi Maruti, you could also try to use osgUtil::Optimizer with the SPATIALIZE_GROUPS flag set. This way, the scenegraph will be laid like an octree, so it would roughly act as the kd-tree between the root and the leaves. I don't know of any program to do what you want, but maybe you could collapse all the geometry into one big geode and then run the kdtree builder visitor on it. To do so, you would use the optimizer with the MERGE_GEODES flag. Alberto El Viernes 05 Septiembre 2008ES 10:33:39 maruti borker escribió: Hi , I understood your point. That is why i said that the kd-tree implemented in OSG wont be useful for my purpose. I just wanted to know if there are any tools/code which creates a single kd-tree of the whole scene. Regards, Maruti Borker IIIT Hyderabad Website:- http://students.iiit.ac.in/~maruti Blog:- http://marutiborker.wordpress.com On Fri, Sep 5, 2008 at 1:52 PM, Robert Osfield [EMAIL PROTECTED]wrote: HI Maruti, On Fri, Sep 5, 2008 at 9:11 AM, maruti borker [EMAIL PROTECTED] wrote: But when i went through the discussion, i found out that only geomety in the leaves have seperate kd-tree and not a single kd-tree for the whole scene. Correct me if i am wrong. The use of KdTree on drawable leaves only is done to provide a good balance between efficiency of intersection test and flexibility. For instance the system we have now handles whole scene with moving parts, if you had a single KdTree you'd need to recompute it all the time. Also a well balanced scene graph will be spatially distributed so will the hierarchical bounding volumes that help intersection tests. Jumping to KdTree for the whole scene graph is technically possible, but you'll need to build the KdTree yourself, and in terms of performance vs flexibility tradeoff's is not good, it's a lot of effort for little gain in performance. 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] Caustics for UnderWater Effect
Hi Robert, Thanks for reply. I am looking for osgTexture3D for create caustics on terrain surface with alpha value between 0.0-0.5 When I texture I want to see terrain surface with caustics but I can only see textures with different state like transparance and opaque version in sliding. What can I do? I mean I want to see like multitexture viewing form surface which is combination of terrain and textures. And another simple question which makes me feel shame while asking :( When I texture the created 3D model how can I specify TexCoord? Because when I texture the model without specification of TexCoord the result like *THAT*http://img84.imageshack.us/my.php?image=cowbh3.png. Thanks so much. Best Regards. Umit Uzun 2008/9/4 Robert Osfield [EMAIL PROTECTED] Hi Umit, I'd use a Texture3D to animate through the images (see osgtexture3D for an example), or if you don't need blending ImageSequence would work on a Texture2D (see osgimagesequence for an example). Texture2DArray is also possible, but it's only supported on latest hardwares/drivers. Robert. On Thu, Sep 4, 2008 at 2:50 PM, Ümit Uzun [EMAIL PROTECTED] wrote: Hi All, I have 30 textures for caustics. I want to make a underwater effect so have to alpha blend texture to terrain surface which was created with VirtualPlanetBuilder. My question is, how should I animate these textures on the terrain? Should I read all texture images to the Texture2DArray and then change the texture images by the time with using NodeCallback? Is there any sample like that or which osg example would help me much? Best Regards. Umit UZUN ___ 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] Texturing issues second window
Hi Scott, I'm currently having the same problem as you, i'm using last developper release OSG 2.7.1. When I open an .osg file in the second view everything is ok, but when I load an .ive file, the texture is missing in the second view. Please let us hear if you've found the trick. 2008/8/3 Robert Osfield [EMAIL PROTECTED] Hi Scott, The most likely cause of this type of problem is contextID's for each graphics context are not being managed appropriately or contextID's are being reused inappropriately. I can't say for sure though as I don't have your code in front of me. Since 2.4 we have done some work on this area, so the problem might already be fixed for you so could you please move to the 2.6.0-rc1 or 2.6 branch in SVN and then let us know if the problem still occurs. Robert. On Mon, Jul 28, 2008 at 3:12 PM, Scott Angster [EMAIL PROTECTED] wrote: Hello- We are seeing an interesting problem that we can not track down. Several previous postings have been similar but not quite what we are seeing. We are hoping someone can point us in a possible direction to find a solution. We have an OSG/QT application using multiple windows with views into the same scene graph. We use multiple instances of the Viewer to do this. We are seeing issues in the second/third/etc window for models loaded in containing textures. The textures do not load and we get Warning: detected OpenGL error 'invalid enumerant' after applying attribute Texture2D when the second window is opened. However if we create an object at runtime, say a sphere, and apply a texture to it, the second/third/etc window do not have problems with it. If we save out the node we created to an IVE file and reload it, the problem is there. I have tried to duplicate this problem using the osgviewer QT example such that I have a simpler code base to work with, and I can't. I have made this example more complex, adding features to it to replicate our code (HUD, textured background, our update loop for updating dynamic transform nodes and camera positioning, our state settings, thread settings, etc). We seem to have an issue with PagedLOD too in our application for the second/third windows. I hope this issue is related so if we focus on the texture problem, maybe the other will be solved. We are using OSG 2.4 and currently QT 3.3 (hope to be moving to 4.X soon). We are seeing this on both our Linux and Windows machines. Thanks for any suggestions or insight into this. Scott ___ 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 -- Alexandre AMALRIC Ingénieur RD === PIXXIM S.A. 73E, rue Perrin-Solliers 13006 Marseille http://www.pixxim.fr ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Texturing issues second window
HI Amalric, If you open the second graphics window after the first second graphics has been rendered and they share the same view, and the texture's are set up to unref images after apply, then only the second graphics window there will be no image to apply. If you have this particular combination of viewer usage then you will have to ensure you don't use the unref images after apply optimization in Textures - by default this is off, but the osgUtil::Optimizer can enable it, so perhaps this has been done from your .ive files, but not your .osg files. Robert. On Fri, Sep 5, 2008 at 11:28 AM, amalric alexandre [EMAIL PROTECTED] wrote: Hi Scott, I'm currently having the same problem as you, i'm using last developper release OSG 2.7.1. When I open an .osg file in the second view everything is ok, but when I load an .ive file, the texture is missing in the second view. Please let us hear if you've found the trick. 2008/8/3 Robert Osfield [EMAIL PROTECTED] Hi Scott, The most likely cause of this type of problem is contextID's for each graphics context are not being managed appropriately or contextID's are being reused inappropriately. I can't say for sure though as I don't have your code in front of me. Since 2.4 we have done some work on this area, so the problem might already be fixed for you so could you please move to the 2.6.0-rc1 or 2.6 branch in SVN and then let us know if the problem still occurs. Robert. On Mon, Jul 28, 2008 at 3:12 PM, Scott Angster [EMAIL PROTECTED] wrote: Hello- We are seeing an interesting problem that we can not track down. Several previous postings have been similar but not quite what we are seeing. We are hoping someone can point us in a possible direction to find a solution. We have an OSG/QT application using multiple windows with views into the same scene graph. We use multiple instances of the Viewer to do this. We are seeing issues in the second/third/etc window for models loaded in containing textures. The textures do not load and we get Warning: detected OpenGL error 'invalid enumerant' after applying attribute Texture2D when the second window is opened. However if we create an object at runtime, say a sphere, and apply a texture to it, the second/third/etc window do not have problems with it. If we save out the node we created to an IVE file and reload it, the problem is there. I have tried to duplicate this problem using the osgviewer QT example such that I have a simpler code base to work with, and I can't. I have made this example more complex, adding features to it to replicate our code (HUD, textured background, our update loop for updating dynamic transform nodes and camera positioning, our state settings, thread settings, etc). We seem to have an issue with PagedLOD too in our application for the second/third windows. I hope this issue is related so if we focus on the texture problem, maybe the other will be solved. We are using OSG 2.4 and currently QT 3.3 (hope to be moving to 4.X soon). We are seeing this on both our Linux and Windows machines. Thanks for any suggestions or insight into this. Scott ___ 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 -- Alexandre AMALRIC Ingénieur RD === PIXXIM S.A. 73E, rue Perrin-Solliers 13006 Marseille http://www.pixxim.fr ___ 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] performance issues with RTT
Hi everybody.
I have some performance problems with rendering to texture.
I am doing some interlacing for an autostereoscopic display. Therefor I need 5
different views on the scene, which I render into textures I later use as input
for the interlacing API.
But doing the RTT slows down my application significantly (even in
Release-mode).
I first thought it would be the interlacer that takes that much time but when I
disabled all interlacing and everything that updates the cameras after the
master camera was moved it didn't really change.
Even now, when everything I do is displaying the picture of the master camera
and additionally rendering to five textures, it runs very halting.
I define 5 target textures and 5 rtt-cameras via
// Configure source textures for the interlacer
_interlacer-resetIterator();
for(int i = 0; i _interlacer-getNumberOfTextures(); i++){
osg::ref_ptrosg::Texture2D renderTexture =
_interlacer-getIteratorTexture();
renderTexture-setTextureSize(_interlacer-getResultTexture()-getTextureWidth(),
_interlacer-getResultTexture()-getTextureHeight());
renderTexture-setInternalFormat(GL_RGBA);
renderTexture-setFilter(osg::Texture2D::MIN_FILTER,
osg::Texture2D::LINEAR);
renderTexture-setFilter(osg::Texture2D::MAG_FILTER,
osg::Texture2D::LINEAR);
_interlacer-incIterator();
}
// Configure cameras of the camera model
_cameras-resetIterator();
_interlacer-resetIterator();
for(int i = 0; i _cameras-getNumberOfCameras(); i++){
osg::ref_ptrosg::Camera textureCamera =
_cameras-getIteratorCamera();
textureCamera-setReferenceFrame(osg::Transform::ABSOLUTE_RF);
textureCamera-setClearMask(GL_COLOR_BUFFER_BIT |
GL_DEPTH_BUFFER_BIT);
textureCamera-setViewport(0,0, winWidth, winHeight);
textureCamera-setRenderTargetImplementation(osg::Camera::FRAME_BUFFER_OBJECT);
textureCamera-setRenderOrder(osg::Camera::PRE_RENDER);
textureCamera-setGraphicsContext(_billInterface-getGraphicsContext());
textureCamera-setAllowEventFocus(false);
textureCamera-addChild(_billInterface-getScene());
textureCamera-attach(osg::Camera::COLOR_BUFFER,
_interlacer-getIteratorTexture().get());
_cameras-incIterator();
_interlacer-incIterator();
}
The five RTT-cameras are children of a group node, which I add to the root node
of my scene graph.
Is there a way to speed up the rendering somehow? I could make the resolution
of the textures smaller (currently it's 1280x1024) but this would decrease the
quality of the final image and I would have to scale the textures before
interlacing what probably also takes some time.
Thanks for any hints,
Steffen
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Re: [osg-users] performance issues with RTT
Hi Steffen,
You need to work out what the bottleneck is in your setup. Try
adjusting the resolution of your textures to see if it's a memory or
fillrate issue. Also try a range of models - ones that are simple
through to ones that are complex to see how things scale - compare
this with a standard osgviewer working on the same models.
In the end rendering your scene 5 times is going to be slower than
mono rendering - you have 5 times are much work to do, and that's even
before the final combining step.
Robert.
On Fri, Sep 5, 2008 at 2:12 PM, Steffen Kim [EMAIL PROTECTED] wrote:
Hi everybody.
I have some performance problems with rendering to texture.
I am doing some interlacing for an autostereoscopic display. Therefor I need
5 different views on the scene, which I render into textures I later use as
input for the interlacing API.
But doing the RTT slows down my application significantly (even in
Release-mode).
I first thought it would be the interlacer that takes that much time but when
I disabled all interlacing and everything that updates the cameras after the
master camera was moved it didn't really change.
Even now, when everything I do is displaying the picture of the master camera
and additionally rendering to five textures, it runs very halting.
I define 5 target textures and 5 rtt-cameras via
// Configure source textures for the interlacer
_interlacer-resetIterator();
for(int i = 0; i _interlacer-getNumberOfTextures(); i++){
osg::ref_ptrosg::Texture2D renderTexture =
_interlacer-getIteratorTexture();
renderTexture-setTextureSize(_interlacer-getResultTexture()-getTextureWidth(),
_interlacer-getResultTexture()-getTextureHeight());
renderTexture-setInternalFormat(GL_RGBA);
renderTexture-setFilter(osg::Texture2D::MIN_FILTER,
osg::Texture2D::LINEAR);
renderTexture-setFilter(osg::Texture2D::MAG_FILTER,
osg::Texture2D::LINEAR);
_interlacer-incIterator();
}
// Configure cameras of the camera model
_cameras-resetIterator();
_interlacer-resetIterator();
for(int i = 0; i _cameras-getNumberOfCameras(); i++){
osg::ref_ptrosg::Camera textureCamera =
_cameras-getIteratorCamera();
textureCamera-setReferenceFrame(osg::Transform::ABSOLUTE_RF);
textureCamera-setClearMask(GL_COLOR_BUFFER_BIT |
GL_DEPTH_BUFFER_BIT);
textureCamera-setViewport(0,0, winWidth, winHeight);
textureCamera-setRenderTargetImplementation(osg::Camera::FRAME_BUFFER_OBJECT);
textureCamera-setRenderOrder(osg::Camera::PRE_RENDER);
textureCamera-setGraphicsContext(_billInterface-getGraphicsContext());
textureCamera-setAllowEventFocus(false);
textureCamera-addChild(_billInterface-getScene());
textureCamera-attach(osg::Camera::COLOR_BUFFER,
_interlacer-getIteratorTexture().get());
_cameras-incIterator();
_interlacer-incIterator();
}
The five RTT-cameras are children of a group node, which I add to the root
node of my scene graph.
Is there a way to speed up the rendering somehow? I could make the resolution
of the textures smaller (currently it's 1280x1024) but this would decrease
the quality of the final image and I would have to scale the textures before
interlacing what probably also takes some time.
Thanks for any hints,
Steffen
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Re: [osg-users] performance issues with RTT
Hello Steffen, ... (currently it's 1280x1024) I haven't really done what you're saying myself, but this strikes me as a possible choking point... Are you disabling the resizeNonPowerOfTwo hint on your RTT textures? It could be that your textures are being resized each time you render to them (each time they're dirtied). You might want to try rendering to 1024x1024 textures. I *think* NPOT textures are as fast as power-of-two textures now on current hardware, but trying it out can't hurt. Also, what hardware and what version of OSG are you running this on? That will help others give you better answers. 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] Exporting from Maya
I'm interested in getting the community's input on the best way to export from Maya to an OSG-readable format. I'm looking for something that will support scene structure, textures, and potentially shaders. We tried FLT export from Maya, but the textures didn't come into OSG. Has anyone come up with a reliable way to bring in Maya data? -Todd ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] Cannot get apps to find plugins
Hi again, I have problems to get my apps to find the plugins. Or rather, there seems to be some issue with the executable. I'm loosing my mind over this today so if someone have some insights I would be more than happy! So I'm on a Mac with Leopard(10.5.4) I tested to build using CMake to generate a Xcode project. I built for 10.5 deployment from Xcode and ran the install scripts using sudo in the terminal. Then I set my OSG_LIBRARY_PATH=/usr/local/lib/osgPlugins-2.6.0 so those would be found. I also set the OSG_FILE_PATH to where I put those files. The examples that installed in /usr/local/share/OpenSceneGraph/bin worked fine from the command line. So far, so fine. Then I proceeded to create a xcode project for a simple OSG app that reads a png file from the resource bundle. But it can't seem to find the plugins... I can't find the source to this issue so I would be glad if someone could tell me in the right direction. - Is it really so that the plugin can't be found? How is that possible? The examples had no problems? - Can there be some binary incompability? Should I turn on some switch in xcode? /Filip ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Cannot get apps to find plugins
Hi Filip, If you have installed the OSG then there should be no need to set the path to the plugins, as the OSG should search the standard lib paths for the presence of the osgPlugins-2.x.x directory. A good way to check where the the OSG is searching for files and plugins is to enable verbose debug messages, on the command line do: setenv OSG_NOTIFY_LEVEL DEBUG osgviewer cow.osg Then look back up through the output till you can see it search for the osgdb_osg plugin. If your system doesn't have the /usr/local/lib on its library path then you could add this, for instance via DYLD_LIBRARY_PATH. I'm no OSX expert though so just recalling stuff from when I've tinkered with Mac's. Robert. On Fri, Sep 5, 2008 at 4:11 PM, Filip Wänström [EMAIL PROTECTED] wrote: Hi again, I have problems to get my apps to find the plugins. Or rather, there seems to be some issue with the executable. I'm loosing my mind over this today so if someone have some insights I would be more than happy! So I'm on a Mac with Leopard(10.5.4) I tested to build using CMake to generate a Xcode project. I built for 10.5 deployment from Xcode and ran the install scripts using sudo in the terminal. Then I set my OSG_LIBRARY_PATH=/usr/local/lib/osgPlugins-2.6.0 so those would be found. I also set the OSG_FILE_PATH to where I put those files. The examples that installed in /usr/local/share/OpenSceneGraph/bin worked fine from the command line. So far, so fine. Then I proceeded to create a xcode project for a simple OSG app that reads a png file from the resource bundle. But it can't seem to find the plugins... I can't find the source to this issue so I would be glad if someone could tell me in the right direction. - Is it really so that the plugin can't be found? How is that possible? The examples had no problems? - Can there be some binary incompability? Should I turn on some switch in xcode? /Filip ___ 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] Displaying a scene in the background of a QGraphicsView
Hi Max, My guess is that Qt is changing OpenGL state which is not being protected, and then you are mixing this with the OSG which assumes that it has complete control over OpenGL state so gets messed up by the QT changes to state, and also Qt OpenGL code is likely to be messed up by the OSG changing state. I don't know enough about the Qt's implementation here to really provide my insight. Personally I'd rather keep Qt doing Windowing and the OSG doing OpenGL. If you want to mix things then you'll need to start playing games with push and popping OpenGL state when entering the Qt OpenGl code path, and also resetting OpenGL state after leaving the OSG section. Robert. On Fri, Sep 5, 2008 at 4:16 PM, Max Pfingsthorn [EMAIL PROTECTED] wrote: Dear users, this problem has been with me for a while. I've even tried it with other graphics engines (Ogre) to no avail. As shown in this toy project at Trolltech Labs http://labs.trolltech.com/blogs/2008/06/27/accelerate-your-widgets-with-opengl/ I would like to show a scene in the background of a QGraphicsView and I was very happy that the ViewerQT class already was a QGLWidget. However, there seems to be something scaled wrong after I call viewer-frame(). Attached are a few screenshots and the code I have so far. I'm currently running Ubuntu 8.04.1 and I'm using the OSG 2.2 binaries that came with it. Beware that you need at least Qt 4.4 to compile this code. qt-osg-1.png and -2.png show how far I am at the moment. Number 2 shows the problem with scaling the window. OSG shows the scene fine in the background, but the widget I'd like to overlay is stretched. I believe the OpenGL version of QPainter draws in some normalized coordinates and the bounding box isn't properly updated. qt-osg-ok-1.png and -2.png show the same window sizes without calling viewer-frame(), and the scaling of the widget is ok. Just no scene in the background of course. I've traced the problem to osgViewer::Renderer::cull_draw(). I believe, when the geometry of the view is set, something makes Qt stop drawing correctly. In the function which calls viewer-frame() (in osgGraphicsView::drawBackground), I thought I save any sort of relevant OpenGL state, the projection matrix, model/view matrix, and even the texture matrix. After the call the viewer-frame(), I restore them again. Is there any other state that I might have overlooked which is set in the renderer? Also, do you have any idea why the Qt widget is not drawn entirely sometimes? Could it have something do to with buffer swaps? Thank you all for your help in advance! Best regards, Max Pfingsthorn ___ 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] performance issues with RTT
Thanks for the hints so far... I gave you wrong information since I forgot that I take care of the NPOT-stuff myself. The API I use later on needs POT-textures so I make sure that only POT-textures are rendered. So in fact my textures are normally 2048x1024. I know that the performance issues are most certain a problem of the texture rendering since we have parts of the application where even huger amounts of (normal render-to-view) cameras are involved without slowing down everything as much. The scene is pretty simple too and runs smoothly without the RTT-cameras. Back on Monday I will try to get some FPS-values for exactly the same camera-setup with and without RTT for different scene complexities (here in Germany the weekend begins now ;)). What I just found out is that the texture sizes make a huge difference in rendering performance. With 256x256-textures my cameras hardly slow down the viewer at all. That's also an evidence that the problem has to be somewhere in the texture-creation-part. If this cannot be enhanced then I probably have to find a good balance between quality and speed. But I still have hopes that there are better ways to improve my performance without having to sacrifice too much resolution-wise. BTW: I'm running my stuff on a Xeon 5160 at 3GHz and 2GB RAM with a Radeon X1900 card. Have a nice weekend, Steffen ___ Jetzt neu! Schützen Sie Ihren PC mit McAfee und WEB.DE. 30 Tage kostenlos testen. http://www.pc-sicherheit.web.de/startseite/?mc=00 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Cannot get apps to find plugins
Thank you Robert, but the wierd thing is that this is in the output: FindFileInPath() : trying /usr/local/lib/osgPlugins-2.6.0/osgdb_qt.so ... FindFileInPath() : USING /usr/local/lib/osgPlugins-2.6.0/osgdb_qt.so Opened DynamicLibrary osgPlugins-2.6.0/osgdb_qt.so Warning: Could not find plugin to read objects from file wood.png. wood.png'. I'll have to dig more on this and report back. I've tried so many different ways now that It might be a better route to uninstall and install anew... /Filip On Fri, Sep 5, 2008 at 5:28 PM, Robert Osfield [EMAIL PROTECTED]wrote: Hi Filip, If you have installed the OSG then there should be no need to set the path to the plugins, as the OSG should search the standard lib paths for the presence of the osgPlugins-2.x.x directory. A good way to check where the the OSG is searching for files and plugins is to enable verbose debug messages, on the command line do: setenv OSG_NOTIFY_LEVEL DEBUG osgviewer cow.osg Then look back up through the output till you can see it search for the osgdb_osg plugin. If your system doesn't have the /usr/local/lib on its library path then you could add this, for instance via DYLD_LIBRARY_PATH. I'm no OSX expert though so just recalling stuff from when I've tinkered with Mac's. Robert. On Fri, Sep 5, 2008 at 4:11 PM, Filip Wänström [EMAIL PROTECTED] wrote: Hi again, I have problems to get my apps to find the plugins. Or rather, there seems to be some issue with the executable. I'm loosing my mind over this today so if someone have some insights I would be more than happy! So I'm on a Mac with Leopard(10.5.4) I tested to build using CMake to generate a Xcode project. I built for 10.5 deployment from Xcode and ran the install scripts using sudo in the terminal. Then I set my OSG_LIBRARY_PATH=/usr/local/lib/osgPlugins-2.6.0 so those would be found. I also set the OSG_FILE_PATH to where I put those files. The examples that installed in /usr/local/share/OpenSceneGraph/bin worked fine from the command line. So far, so fine. Then I proceeded to create a xcode project for a simple OSG app that reads a png file from the resource bundle. But it can't seem to find the plugins... I can't find the source to this issue so I would be glad if someone could tell me in the right direction. - Is it really so that the plugin can't be found? How is that possible? The examples had no problems? - Can there be some binary incompability? Should I turn on some switch in xcode? /Filip ___ 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] Displaying a scene in the background of a QGraphicsView
Hello Robert, Thank you very much for your reply. My thoughts exactly. But how do I save and restore the opengl state in its entirety? I tried pushing/popping the modelview, projection and even the texture matrices around calling viewer-frame(). I also explicitly glGet'ed them and loaded them again after OSG was done in case push/pops were not matched properly inside OSG. What else is there to save in the opengl state? Best regards, Max Pfingsthorn On 5 Sep 2008, at 17:40, Robert Osfield [EMAIL PROTECTED] wrote: Hi Max, My guess is that Qt is changing OpenGL state which is not being protected, and then you are mixing this with the OSG which assumes that it has complete control over OpenGL state so gets messed up by the QT changes to state, and also Qt OpenGL code is likely to be messed up by the OSG changing state. I don't know enough about the Qt's implementation here to really provide my insight. Personally I'd rather keep Qt doing Windowing and the OSG doing OpenGL. If you want to mix things then you'll need to start playing games with push and popping OpenGL state when entering the Qt OpenGl code path, and also resetting OpenGL state after leaving the OSG section. Robert. On Fri, Sep 5, 2008 at 4:16 PM, Max Pfingsthorn [EMAIL PROTECTED] wrote: Dear users, this problem has been with me for a while. I've even tried it with other graphics engines (Ogre) to no avail. As shown in this toy project at Trolltech Labs http://labs.trolltech.com/blogs/2008/06/27/accelerate-your-widgets-with-opengl/ I would like to show a scene in the background of a QGraphicsView and I was very happy that the ViewerQT class already was a QGLWidget. However, there seems to be something scaled wrong after I call viewer-frame (). Attached are a few screenshots and the code I have so far. I'm currently running Ubuntu 8.04.1 and I'm using the OSG 2.2 binaries that came with it. Beware that you need at least Qt 4.4 to compile this code. qt-osg-1.png and -2.png show how far I am at the moment. Number 2 shows the problem with scaling the window. OSG shows the scene fine in the background, but the widget I'd like to overlay is stretched. I believe the OpenGL version of QPainter draws in some normalized coordinates and the bounding box isn't properly updated. qt-osg-ok-1.png and -2.png show the same window sizes without calling viewer-frame(), and the scaling of the widget is ok. Just no scene in the background of course. I've traced the problem to osgViewer::Renderer::cull_draw(). I believe, when the geometry of the view is set, something makes Qt stop drawing correctly. In the function which calls viewer-frame() (in osgGraphicsView::drawBackground), I thought I save any sort of relevant OpenGL state, the projection matrix, model/view matrix, and even the texture matrix. After the call the viewer-frame(), I restore them again. Is there any other state that I might have overlooked which is set in the renderer? Also, do you have any idea why the Qt widget is not drawn entirely sometimes? Could it have something do to with buffer swaps? Thank you all for your help in advance! Best regards, Max Pfingsthorn ___ 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] Exporting from Maya
Hi Todd, We regularly use maya's ascii obj format. This works rather well for our needs. I believe there exists an osg exporter for maya as well. -bob I'm interested in getting the community's input on the best way to export from Maya to an OSG-readable format. I'm looking for something that will support scene structure, textures, and potentially shaders. We tried FLT export from Maya, but the textures didn't come into OSG. Has anyone come up with a reliable way to bring in Maya data? -Todd ___ 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] Exporting from Maya
On Fri, 5 Sep 2008, Todd J. Furlong wrote: I couldn't find a valid link to the OSG Maya exporter. That would be helpful if someone could post it. Not sure of the platform you're on, but found win32 binary and source for the osg maya exporter here: http://web.archive.org/web/20070203172951/http://www.diosoft.com/soft/osgmaya/ I love the wayback machine :) I didn't think OBJ supported texture maps, but it looks like I was wrong about that. They do. Just make sure you have them properly UV mapped. hth -bob -Todd Bob Huebert wrote: Hi Todd, We regularly use maya's ascii obj format. This works rather well for our needs. I believe there exists an osg exporter for maya as well. -bob I'm interested in getting the community's input on the best way to export from Maya to an OSG-readable format. I'm looking for something that will support scene structure, textures, and potentially shaders. We tried FLT export from Maya, but the textures didn't come into OSG. Has anyone come up with a reliable way to bring in Maya data? -Todd ___ 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 -- Todd J. Furlong Inv3rsion, LLC 888-588-0573 x81 office 603-759-9035 mobile 603-584-0454 fax ___ 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] Fullscreen
Greetings, I'm upgrading some old OSG 1.2 code to OSG 2.4 and need to implement the option to run in fullscreen mode. Sans Producer, how is this done? Also, is this true fullscreen (i.e., exclusive) mode or just a borderless topmost window sized to fit the screen? Many thanks in advanced, /* blahpers */ ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] VPB error
Robert, I looked at the front page and nothing is mentioned about OSG 2.6. I have tried VPB 0.9.7 and make fails with several errors. The SVN version compiles, but gives the the error when I try to run it. Can you tell me which version of VPB I need? Michael On Thu, 2008-09-04 at 10:27 +0100, Robert Osfield wrote: HI Michael, There are notes on the virtualplanetbuidler.osgforge.osg front page that describes with versions of the VPB work with which versions of OSG. As always the VPB svn trunk works against the OSG svn trunk, not OSG 2.6. Robert. On Thu, Sep 4, 2008 at 4:00 AM, Michael W. Hall [EMAIL PROTECTED] wrote: Has there been a new release of VPB? I built it, but when I try to run it I get the following: osgdem: error while loading shared libraries: libvpb.so.8: cannot open shared object file: No such file or directory Looks as thought something did not install. Just wondering if someone may have some idea. I got the version of VPB from SVN and it appears to build with the OSG that I have, 2.6 RC1. Thanks, Michael ___ 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] Cannot get apps to find plugins
Hi Filip, Could you try other and model image formats, such as osgviewer cow.osg And see what happens. Robert. On Fri, Sep 5, 2008 at 6:33 PM, Filip Wänström [EMAIL PROTECTED] wrote: Thank you Robert, but the wierd thing is that this is in the output: FindFileInPath() : trying /usr/local/lib/osgPlugins-2.6.0/osgdb_qt.so ... FindFileInPath() : USING /usr/local/lib/osgPlugins-2.6.0/osgdb_qt.so Opened DynamicLibrary osgPlugins-2.6.0/osgdb_qt.so Warning: Could not find plugin to read objects from file wood.png. wood.png'. I'll have to dig more on this and report back. I've tried so many different ways now that It might be a better route to uninstall and install anew... /Filip On Fri, Sep 5, 2008 at 5:28 PM, Robert Osfield [EMAIL PROTECTED] wrote: Hi Filip, If you have installed the OSG then there should be no need to set the path to the plugins, as the OSG should search the standard lib paths for the presence of the osgPlugins-2.x.x directory. A good way to check where the the OSG is searching for files and plugins is to enable verbose debug messages, on the command line do: setenv OSG_NOTIFY_LEVEL DEBUG osgviewer cow.osg Then look back up through the output till you can see it search for the osgdb_osg plugin. If your system doesn't have the /usr/local/lib on its library path then you could add this, for instance via DYLD_LIBRARY_PATH. I'm no OSX expert though so just recalling stuff from when I've tinkered with Mac's. Robert. On Fri, Sep 5, 2008 at 4:11 PM, Filip Wänström [EMAIL PROTECTED] wrote: Hi again, I have problems to get my apps to find the plugins. Or rather, there seems to be some issue with the executable. I'm loosing my mind over this today so if someone have some insights I would be more than happy! So I'm on a Mac with Leopard(10.5.4) I tested to build using CMake to generate a Xcode project. I built for 10.5 deployment from Xcode and ran the install scripts using sudo in the terminal. Then I set my OSG_LIBRARY_PATH=/usr/local/lib/osgPlugins-2.6.0 so those would be found. I also set the OSG_FILE_PATH to where I put those files. The examples that installed in /usr/local/share/OpenSceneGraph/bin worked fine from the command line. So far, so fine. Then I proceeded to create a xcode project for a simple OSG app that reads a png file from the resource bundle. But it can't seem to find the plugins... I can't find the source to this issue so I would be glad if someone could tell me in the right direction. - Is it really so that the plugin can't be found? How is that possible? The examples had no problems? - Can there be some binary incompability? Should I turn on some switch in xcode? /Filip ___ 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] performance issues with RTT
HI Guys, What are you all doing with your RTT Camera's? Are you just doing render to texture, or are you doing a copy to Image/glReadPixels as well? The later will throw a big slow down as it requires a round trip to the graphics card and an associated finish of the all OpenGL prior to the glReadPixels. Robert. On Fri, Sep 5, 2008 at 6:38 PM, Harash Sharma [EMAIL PROTECTED] wrote: Hi Steffen, Guay and Robert, In the same regard I would like to mention something. We have also developed an application that uses multiple RTT cameras. However only one camera is active at a time ( the rest are masked using node mask). All cameras differ only in the resolution of the texture, they are viewing exactly the same scene and have identical fields of view. We too have found that the frame rate has a lot of dependence on the texture size. 256 x256 texture gives a fairly high frame rate(30+ frames/second), 512x512 slows it down considerably (to around 8 frames / second) and 1024x1024 slows it even further (~ 1 fps). All these figures are in release mode build. My machine specifications Processor: Xeon 5160 RAM:4 GB Fully Buffered DDR2 Graphics:nVidia Quadro FX4500 (512MB) I would be highly obliged if a way out can be suggested. Regards Harash - Original Message From: Steffen Kim [EMAIL PROTECTED] To: osg-users@lists.openscenegraph.org Sent: Friday, September 5, 2008 10:04:25 PM Subject: Re: [osg-users] performance issues with RTT Thanks for the hints so far... I gave you wrong information since I forgot that I take care of the NPOT-stuff myself. The API I use later on needs POT-textures so I make sure that only POT-textures are rendered. So in fact my textures are normally 2048x1024. I know that the performance issues are most certain a problem of the texture rendering since we have parts of the application where even huger amounts of (normal render-to-view) cameras are involved without slowing down everything as much. The scene is pretty simple too and runs smoothly without the RTT-cameras. Back on Monday I will try to get some FPS-values for exactly the same camera-setup with and without RTT for different scene complexities (here in Germany the weekend begins now ;)). What I just found out is that the texture sizes make a huge difference in rendering performance. With 256x256-textures my cameras hardly slow down the viewer at all. That's also an evidence that the problem has to be somewhere in the texture-creation-part. If this cannot be enhanced then I probably have to find a good balance between quality and speed. But I still have hopes that there are better ways to improve my performance without having to sacrifice too much resolution-wise. BTW: I'm running my stuff on a Xeon 5160 at 3GHz and 2GB RAM with a Radeon X1900 card. Have a nice weekend, Steffen ___ Jetzt neu! Schützen Sie Ihren PC mit McAfee und WEB.DE. 30 Tage kostenlos testen. http://www.pc-sicherheit.web.de/startseite/?mc=00 ___ 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] Displaying a scene in the background of a QGraphicsView
Hi Max, The topic of mixing OpenGL code with the OSG has been discussed many times on osg-users so have a look through the archives on this topic. glPushAttrib would also be a good keyword to search on. Robert. On Fri, Sep 5, 2008 at 6:42 PM, Max Pfingsthorn [EMAIL PROTECTED] wrote: Hello Robert, Thank you very much for your reply. My thoughts exactly. But how do I save and restore the opengl state in its entirety? I tried pushing/popping the modelview, projection and even the texture matrices around calling viewer-frame(). I also explicitly glGet'ed them and loaded them again after OSG was done in case push/pops were not matched properly inside OSG. What else is there to save in the opengl state? Best regards, Max Pfingsthorn On 5 Sep 2008, at 17:40, Robert Osfield [EMAIL PROTECTED] wrote: Hi Max, My guess is that Qt is changing OpenGL state which is not being protected, and then you are mixing this with the OSG which assumes that it has complete control over OpenGL state so gets messed up by the QT changes to state, and also Qt OpenGL code is likely to be messed up by the OSG changing state. I don't know enough about the Qt's implementation here to really provide my insight. Personally I'd rather keep Qt doing Windowing and the OSG doing OpenGL. If you want to mix things then you'll need to start playing games with push and popping OpenGL state when entering the Qt OpenGl code path, and also resetting OpenGL state after leaving the OSG section. Robert. On Fri, Sep 5, 2008 at 4:16 PM, Max Pfingsthorn [EMAIL PROTECTED] wrote: Dear users, this problem has been with me for a while. I've even tried it with other graphics engines (Ogre) to no avail. As shown in this toy project at Trolltech Labs http://labs.trolltech.com/blogs/2008/06/27/accelerate-your-widgets-with-opengl/ I would like to show a scene in the background of a QGraphicsView and I was very happy that the ViewerQT class already was a QGLWidget. However, there seems to be something scaled wrong after I call viewer-frame(). Attached are a few screenshots and the code I have so far. I'm currently running Ubuntu 8.04.1 and I'm using the OSG 2.2 binaries that came with it. Beware that you need at least Qt 4.4 to compile this code. qt-osg-1.png and -2.png show how far I am at the moment. Number 2 shows the problem with scaling the window. OSG shows the scene fine in the background, but the widget I'd like to overlay is stretched. I believe the OpenGL version of QPainter draws in some normalized coordinates and the bounding box isn't properly updated. qt-osg-ok-1.png and -2.png show the same window sizes without calling viewer-frame(), and the scaling of the widget is ok. Just no scene in the background of course. I've traced the problem to osgViewer::Renderer::cull_draw(). I believe, when the geometry of the view is set, something makes Qt stop drawing correctly. In the function which calls viewer-frame() (in osgGraphicsView::drawBackground), I thought I save any sort of relevant OpenGL state, the projection matrix, model/view matrix, and even the texture matrix. After the call the viewer-frame(), I restore them again. Is there any other state that I might have overlooked which is set in the renderer? Also, do you have any idea why the Qt widget is not drawn entirely sometimes? Could it have something do to with buffer swaps? Thank you all for your help in advance! Best regards, Max Pfingsthorn ___ 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] Fullscreen
Hi Tim, By default the osgViewer library will open up windows fullscreen, i.e. try runing osgviewer or almost all of the osg examples. For examples of explictly setting up windows have a look at the osgcamera example and also the View::setUpView*() methods in src/osgViewer/View.cpp. The fullscreen window It is done using a borderless window, in the same way the Producer did it. Robert. On Fri, Sep 5, 2008 at 7:47 PM, Tim Jaffe [EMAIL PROTECTED] wrote: Greetings, I'm upgrading some old OSG 1.2 code to OSG 2.4 and need to implement the option to run in fullscreen mode. Sans Producer, how is this done? Also, is this true fullscreen (i.e., exclusive) mode or just a borderless topmost window sized to fit the screen? Many thanks in advanced, /* blahpers */ ___ 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] VPB error
On Fri, Sep 5, 2008 at 8:26 PM, Michael W. Hall [EMAIL PROTECTED] wrote: I looked at the front page and nothing is mentioned about OSG 2.6. And yet you still wanted to make the assumption that implictly SVN/trunk meant OSG 2.6... the VPB wiki front page tells you everything that is to know. I have tried VPB 0.9.7 and make fails with several errors. The SVN version compiles, but gives the the error when I try to run it. Can you tell me which version of VPB I need? There is no VPB dev release that maps to OSG-2.6. VPB is in development, and isn't far away from its 1.0. To pick up on the latest VPB you'll need VPB svn/trunk and OSG svn/trunk as some of the recent additions to VPB required mods to osgTerrain in OSG, since 2.6. Once VPB is ready for its next dev release I'll match a VPB dev release with a corresponding OSG dev release. I'm not ready for this yet. Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] Speeding Up osgText?
This is in reference to a previous question that has been posed. Sorry
if this has already been addressed.
http://lists.openscenegraph.org/htdig.cgi/osg-users-openscenegraph.org/2
008-April/009652.html
Our application seems to be hitting this same issue. We are trying to
render quite a bit of text on the screen, and we seem to be getting
burned by both the setText( ... ) and the drawImplementation.
We are currently using an older version of OSG, but we are planning on
moving to 2.6.0 relatively soon. I have looked at our current version
of osgText and the 2.6.0 version and can conclude that this will still
be an issue.
Our application is building the text shapes with SCREEN_COORDS for the
character size mode and SCREEN for axis alignment.
What I have noticed is that for each text shape update, the function
computeGlyphRepresentation is called to recompute the glyph information.
This function then calls the function computePositions. Here is what
compute positions looks like.
void Text::computePositions()
{
unsigned int size =
osg::maximum(osg::DisplaySettings::instance()-getMaxNumberOfGraphicsCon
texts(),_autoTransformCache.size());
// FIXME: OPTIMIZE: This would be one of the ideal locations to
// call computeAverageGlypthWidthAndHeight(). It is out of the
contextID loop
// so the value would be computed fewer times. But the code will
need changes
// to get the value down to the locations it is needed. (Either pass
through parameters
// or member variables, but we would need a system to know if the
values are stale.)
for(unsigned int i=0;isize;++i)
{
computePositions(i);
}
}
As can be seen by the first line, the maximum size is being obtained
from the maximum number of graphics contexts or the size of
_autoTransformCache. For me this is set to 32, since the default was
never being changed. The computePositions function is a very expensive
operation, and a minor flaw in our design was causing a huge impact in
performance. It might be a good idea to either assert on or to check
the traversalNumber from the _autoTransformCache to make sure the
context is a valid one.
Performance is still down for our application. I think some of the
problem is related to this computePositions function still. Our
application is frequently setting text, so we incur a CPU hit to
recalculate all the glyph vertices. When the text is visible, we incur
the same CPU hit to recalculate all the glyph vertices since the
_autoTransformCache model view matrix are always different between the
update of the text and the current state of the draw phase. Here's the
draw implementation for text.
void Text::drawImplementation(osg::State state) const
{
unsigned int contextID = state.getContextID();
CODE REMOVED
if (_characterSizeMode!=OBJECT_COORDS || _autoRotateToScreen)
{
CODE REMOVED
AutoTransformCache atc = _autoTransformCache[contextID];
const osg::Matrix modelview = state.getModelViewMatrix();
const osg::Matrix projection = state.getProjectionMatrix();
CODE REMOVED
bool doUpdate = atc._traversalNumber==-1;
if (atc._traversalNumber=0)
{
if (atc._modelview!=modelview)
{
doUpdate = true;
}
else if (width!=atc._width || height!=atc._height)
{
doUpdate = true;
}
else if (atc._projection!=projection)
{
doUpdate = true;
}
}
atc._traversalNumber = frameNumber;
atc._width = width;
atc._height = height;
if (doUpdate)
{
atc._transformedPosition = newTransformedPosition;
atc._projection = projection;
atc._modelview = modelview;
computePositions(contextID);
}
}
CODE REMOVED
}
With the draw implementation above and the setText all being called
within a render frame, we are computing the glyph vertices twice. I
think we can speed things up a bit, but I need some information.
Is there a reason as to why we need to call computePositions from within
computeGlyphRepresentation if the drawImplementation will already take
care of that? As far as I can see, computeGlyphRepresentation is
already doing the calculations for the bounding box. Makes sense that
we only have that information. We can then just allow the
drawImplementation do the nasty work of recalculating the vertices by
calling computePositions.
Does anyone have any suggestions that might help in improving
performance? I am wondering if some of this work could be moved from
the CPU and pushed to the GPU.
Sorry for the long post and thanks for any suggestions.
Ryan H. Kawicki
The Boeing Company
Training Systems Services
Software Engineer
___
osg-users mailing list
Re: [osg-users] Speeding Up osgText?
Hi Ryan,
can't answer your question immediately but i am embarking on a lot of
work around osgText so thanks for the heads up and the detailed post.
I'll consider your points as i work through what i need to do. Will
obviously post feedback to the group.
rgds
Nick
Kawicki, Ryan H wrote:
This is in reference to a previous question that has been posed. Sorry
if this has already been addressed.
http://lists.openscenegraph.org/htdig.cgi/osg-users-openscenegraph.org/2
008-April/009652.html
Our application seems to be hitting this same issue. We are trying to
render quite a bit of text on the screen, and we seem to be getting
burned by both the setText( ... ) and the drawImplementation.
We are currently using an older version of OSG, but we are planning on
moving to 2.6.0 relatively soon. I have looked at our current version
of osgText and the 2.6.0 version and can conclude that this will still
be an issue.
Our application is building the text shapes with SCREEN_COORDS for the
character size mode and SCREEN for axis alignment.
What I have noticed is that for each text shape update, the function
computeGlyphRepresentation is called to recompute the glyph information.
This function then calls the function computePositions. Here is what
compute positions looks like.
void Text::computePositions()
{
unsigned int size =
osg::maximum(osg::DisplaySettings::instance()-getMaxNumberOfGraphicsCon
texts(),_autoTransformCache.size());
// FIXME: OPTIMIZE: This would be one of the ideal locations to
// call computeAverageGlypthWidthAndHeight(). It is out of the
contextID loop
// so the value would be computed fewer times. But the code will
need changes
// to get the value down to the locations it is needed. (Either pass
through parameters
// or member variables, but we would need a system to know if the
values are stale.)
for(unsigned int i=0;isize;++i)
{
computePositions(i);
}
}
As can be seen by the first line, the maximum size is being obtained
from the maximum number of graphics contexts or the size of
_autoTransformCache. For me this is set to 32, since the default was
never being changed. The computePositions function is a very expensive
operation, and a minor flaw in our design was causing a huge impact in
performance. It might be a good idea to either assert on or to check
the traversalNumber from the _autoTransformCache to make sure the
context is a valid one.
Performance is still down for our application. I think some of the
problem is related to this computePositions function still. Our
application is frequently setting text, so we incur a CPU hit to
recalculate all the glyph vertices. When the text is visible, we incur
the same CPU hit to recalculate all the glyph vertices since the
_autoTransformCache model view matrix are always different between the
update of the text and the current state of the draw phase. Here's the
draw implementation for text.
void Text::drawImplementation(osg::State state) const
{
unsigned int contextID = state.getContextID();
CODE REMOVED
if (_characterSizeMode!=OBJECT_COORDS || _autoRotateToScreen)
{
CODE REMOVED
AutoTransformCache atc = _autoTransformCache[contextID];
const osg::Matrix modelview = state.getModelViewMatrix();
const osg::Matrix projection = state.getProjectionMatrix();
CODE REMOVED
bool doUpdate = atc._traversalNumber==-1;
if (atc._traversalNumber=0)
{
if (atc._modelview!=modelview)
{
doUpdate = true;
}
else if (width!=atc._width || height!=atc._height)
{
doUpdate = true;
}
else if (atc._projection!=projection)
{
doUpdate = true;
}
}
atc._traversalNumber = frameNumber;
atc._width = width;
atc._height = height;
if (doUpdate)
{
atc._transformedPosition = newTransformedPosition;
atc._projection = projection;
atc._modelview = modelview;
computePositions(contextID);
}
}
CODE REMOVED
}
With the draw implementation above and the setText all being called
within a render frame, we are computing the glyph vertices twice. I
think we can speed things up a bit, but I need some information.
Is there a reason as to why we need to call computePositions from within
computeGlyphRepresentation if the drawImplementation will already take
care of that? As far as I can see, computeGlyphRepresentation is
already doing the calculations for the bounding box. Makes sense that
we only have that information. We can then just allow the
drawImplementation do the nasty work of recalculating the vertices by
calling computePositions.
Does anyone have any suggestions that might help in improving
performance? I am wondering if
Re: [osg-users] Speeding Up osgText?
On Fri, 2008-09-05 at 22:53 +0100, Nick Bryan wrote:
Hi Ryan,
can't answer your question immediately but i am embarking on a lot of
work around osgText so thanks for the heads up and the detailed post.
I'll consider your points as i work through what i need to do. Will
obviously post feedback to the group.
I'd be very interested in know what and how and why you're doing
this. :)
I've been asking about some osgText for months to improve osgWidget, but
haven't really made any impressions I don't think (we're all pretty
busy, as it were).
As such, I have begun (and am almost finished!) writing an OSG NodeKit
called osgPango, which uses the Pango library to layout text, create
high-quality subpixel fonts renderings, etc. Whether or not anyone else
will be interested in it is hard to say, but I intend on using it for my
own purpose because I get superb font quality (even shadows and
outlines!) and a simplified API.
I had originally intended to just hack osgText, but the code is far too
complicated for me to grok. :) So I just ended up writing a different
NodeKit for it, which will be compaitble with osgWidget for sure (in the
form of osgPango::Label and osgPango::Input).
I have posted many times about osgText in the past, and if you would
like I can recall those links here for you to check out (particularly
with regards to quality--see osgfont--and the inability to insure that
all quads are pixel-aligned and that I can access the extents of each
text glyph individually for input...)
rgds
Nick
Kawicki, Ryan H wrote:
This is in reference to a previous question that has been posed. Sorry
if this has already been addressed.
http://lists.openscenegraph.org/htdig.cgi/osg-users-openscenegraph.org/2
008-April/009652.html
Our application seems to be hitting this same issue. We are trying to
render quite a bit of text on the screen, and we seem to be getting
burned by both the setText( ... ) and the drawImplementation.
We are currently using an older version of OSG, but we are planning on
moving to 2.6.0 relatively soon. I have looked at our current version
of osgText and the 2.6.0 version and can conclude that this will still
be an issue.
Our application is building the text shapes with SCREEN_COORDS for the
character size mode and SCREEN for axis alignment.
What I have noticed is that for each text shape update, the function
computeGlyphRepresentation is called to recompute the glyph information.
This function then calls the function computePositions. Here is what
compute positions looks like.
void Text::computePositions()
{
unsigned int size =
osg::maximum(osg::DisplaySettings::instance()-getMaxNumberOfGraphicsCon
texts(),_autoTransformCache.size());
// FIXME: OPTIMIZE: This would be one of the ideal locations to
// call computeAverageGlypthWidthAndHeight(). It is out of the
contextID loop
// so the value would be computed fewer times. But the code will
need changes
// to get the value down to the locations it is needed. (Either pass
through parameters
// or member variables, but we would need a system to know if the
values are stale.)
for(unsigned int i=0;isize;++i)
{
computePositions(i);
}
}
As can be seen by the first line, the maximum size is being obtained
from the maximum number of graphics contexts or the size of
_autoTransformCache. For me this is set to 32, since the default was
never being changed. The computePositions function is a very expensive
operation, and a minor flaw in our design was causing a huge impact in
performance. It might be a good idea to either assert on or to check
the traversalNumber from the _autoTransformCache to make sure the
context is a valid one.
Performance is still down for our application. I think some of the
problem is related to this computePositions function still. Our
application is frequently setting text, so we incur a CPU hit to
recalculate all the glyph vertices. When the text is visible, we incur
the same CPU hit to recalculate all the glyph vertices since the
_autoTransformCache model view matrix are always different between the
update of the text and the current state of the draw phase. Here's the
draw implementation for text.
void Text::drawImplementation(osg::State state) const
{
unsigned int contextID = state.getContextID();
CODE REMOVED
if (_characterSizeMode!=OBJECT_COORDS || _autoRotateToScreen)
{
CODE REMOVED
AutoTransformCache atc = _autoTransformCache[contextID];
const osg::Matrix modelview = state.getModelViewMatrix();
const osg::Matrix projection = state.getProjectionMatrix();
CODE REMOVED
bool doUpdate = atc._traversalNumber==-1;
if (atc._traversalNumber=0)
{
if (atc._modelview!=modelview)
{
Re: [osg-users] Speeding Up osgText?
Jeremy I didn't pick up on OSG until July this year so I'm very much a
newbie. I've spent time playing around and reading the newsgroup but
have yet to do anything serious. Having read up on Pango I'm pretty
interested in your work and maybe i don't need to do anything - if only ;-)
Nick
Jeremy Moles wrote:
On Fri, 2008-09-05 at 22:53 +0100, Nick Bryan wrote:
Hi Ryan,
can't answer your question immediately but i am embarking on a lot of
work around osgText so thanks for the heads up and the detailed post.
I'll consider your points as i work through what i need to do. Will
obviously post feedback to the group.
I'd be very interested in know what and how and why you're doing
this. :)
I've been asking about some osgText for months to improve osgWidget, but
haven't really made any impressions I don't think (we're all pretty
busy, as it were).
As such, I have begun (and am almost finished!) writing an OSG NodeKit
called osgPango, which uses the Pango library to layout text, create
high-quality subpixel fonts renderings, etc. Whether or not anyone else
will be interested in it is hard to say, but I intend on using it for my
own purpose because I get superb font quality (even shadows and
outlines!) and a simplified API.
I had originally intended to just hack osgText, but the code is far too
complicated for me to grok. :) So I just ended up writing a different
NodeKit for it, which will be compaitble with osgWidget for sure (in the
form of osgPango::Label and osgPango::Input).
I have posted many times about osgText in the past, and if you would
like I can recall those links here for you to check out (particularly
with regards to quality--see osgfont--and the inability to insure that
all quads are pixel-aligned and that I can access the extents of each
text glyph individually for input...)
rgds
Nick
Kawicki, Ryan H wrote:
This is in reference to a previous question that has been posed. Sorry
if this has already been addressed.
http://lists.openscenegraph.org/htdig.cgi/osg-users-openscenegraph.org/2
008-April/009652.html
Our application seems to be hitting this same issue. We are trying to
render quite a bit of text on the screen, and we seem to be getting
burned by both the setText( ... ) and the drawImplementation.
We are currently using an older version of OSG, but we are planning on
moving to 2.6.0 relatively soon. I have looked at our current version
of osgText and the 2.6.0 version and can conclude that this will still
be an issue.
Our application is building the text shapes with SCREEN_COORDS for the
character size mode and SCREEN for axis alignment.
What I have noticed is that for each text shape update, the function
computeGlyphRepresentation is called to recompute the glyph information.
This function then calls the function computePositions. Here is what
compute positions looks like.
void Text::computePositions()
{
unsigned int size =
osg::maximum(osg::DisplaySettings::instance()-getMaxNumberOfGraphicsCon
texts(),_autoTransformCache.size());
// FIXME: OPTIMIZE: This would be one of the ideal locations to
// call computeAverageGlypthWidthAndHeight(). It is out of the
contextID loop
// so the value would be computed fewer times. But the code will
need changes
// to get the value down to the locations it is needed. (Either pass
through parameters
// or member variables, but we would need a system to know if the
values are stale.)
for(unsigned int i=0;isize;++i)
{
computePositions(i);
}
}
As can be seen by the first line, the maximum size is being obtained
from the maximum number of graphics contexts or the size of
_autoTransformCache. For me this is set to 32, since the default was
never being changed. The computePositions function is a very expensive
operation, and a minor flaw in our design was causing a huge impact in
performance. It might be a good idea to either assert on or to check
the traversalNumber from the _autoTransformCache to make sure the
context is a valid one.
Performance is still down for our application. I think some of the
problem is related to this computePositions function still. Our
application is frequently setting text, so we incur a CPU hit to
recalculate all the glyph vertices. When the text is visible, we incur
the same CPU hit to recalculate all the glyph vertices since the
_autoTransformCache model view matrix are always different between the
update of the text and the current state of the draw phase. Here's the
draw implementation for text.
void Text::drawImplementation(osg::State state) const
{
unsigned int contextID = state.getContextID();
CODE REMOVED
if (_characterSizeMode!=OBJECT_COORDS || _autoRotateToScreen)
{
CODE REMOVED
AutoTransformCache atc = _autoTransformCache[contextID];
const osg::Matrix modelview = state.getModelViewMatrix();
const osg::Matrix projection = state.getProjectionMatrix();
[osg-users] Bug in osg text in certain circonstance
Hi guys, Strange bug with osgText, with the current configuration: std::string fontName = ../data/Vera.ttf; VarsEditor::instance()-get(fontPlayerName, fontName); osgText::Font* font = osgText::readFontFile(fontName.c_str()); _seatNumber-setFont(font); _seatNumber-setCharacterSize(25); _seatNumber-setCharacterSizeMode(osgText::Text::SCREEN_COORDS); _seatNumber-setAlignment(osgText::Text::CENTER_CENTER); _seatNumber-setFontResolution(30,30); _seatNumber-setAxisAlignment(osgText::Text::SCREEN); std::stringstream ss; ss Seat data._seatNumber; _seatNumber-setText(ss.str()); I added a video because i don't how to explain it. A text should be display and it is not, it's a bit random, sometimes it works sometime it does not. I dump the osg tree and the osgText was in the file, then if i re read the file with osgviewer it works. I found a trick to make it display again in my application, moving the camera very near, then it appears. I don't have any idea appart accusing osgText. I tried in SingleThreaded and the problem and it does not change. I guess it's related to the camera position when i create the text. Because i susupect that, i tried a configuration std::string fontName = ../data/Vera.ttf; VarsEditor::instance()-get(fontPlayerName, fontName); osgText::Font* font = osgText::readFontFile(fontName.c_str()); _seatNumber-setFont(font); _seatNumber-setCharacterSize(0.25); //_seatNumber-setCharacterSizeMode(osgText::Text::SCREEN_COORDS); _seatNumber-setAlignment(osgText::Text::CENTER_CENTER); _seatNumber-setFontResolution(30,30); _seatNumber-setAxisAlignment(osgText::Text::SCREEN); std::stringstream ss; ss Seat data._seatNumber; _seatNumber-setText(ss.str()); So the character size mode is now the default, and with that i cant reproduce the bug. So last information i have is when i create the text the text is behind the camera so maybe it does not help for the _seatNumber-setCharacterSizeMode(osgText::Text::SCREEN_COORDS) mode. here the video http://www.plopbyte.net/tmp/osgText.ogg -- +33 (0) 6 63 20 03 56 Cedric Pinson mailto:[EMAIL PROTECTED] http://www.plopbyte.net ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] ply or off model format
Hi Can osg plugin read .ply or off model format? Thanks. YangXiao. - 雅虎邮箱，您的终生邮箱！___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
