Re: [osg-users] osgPPU vs RTT
Hi, as I was able to see the MPV and CIGI projects are something like rendering over the netwrok - interface thing. I wasn't able to find info how the RTT is handled there. Also it seems that is is using an almost outdated osg version, since osgUtil::SceneView is already deprecated since osg 2.x What you get directly from the MPV seems not to be enough to use osgPPU or otehr direct post processing libraries (if such exist ;), since there are no texture available. However if you have access to SceneView you can get the camera from there and hence the according master camera texture. Hence I would suppose this is the way to go. All other alternatives as for example directly sampling the video memory and copying into a texture (if such things are possible with MPV and SDL (sdl is used as backend there) ) would cost too much performance. I hope I was able to help. Best regards, art --- Patrick Castonguay [EMAIL PROTECTED] schrieb am Do, 13.11.2008: Von: Patrick Castonguay [EMAIL PROTECTED] Betreff: Re: [osg-users] osgPPU vs RTT An: osg-users@lists.openscenegraph.org Datum: Donnerstag, 13. November 2008, 17:29 Art, Here are the link to the MPV project: CIGI website: http://cigi.sourceforge.net/ MPV website: http://cigi.sourceforge.net/product_mpv.php From what I can see (and I am not an expert) there is no direct use of osg::Texture, UnitTexture or osg::Camera. It seems to me that osg::Geode, Geometry and StateSet is used most places where rendering is done. As well the scene graph looks something like this, before adding much data in there: RootNode EntityBranchNode Entities... TerrainBranchNode Terrain info... SkyBranchNode Sky info... If I do a sceneGraphDump when there a terrain and other stuff loaded I get a really long dump but I still can't see any information about cameras or such... What I do get from the MPV which is related to the rendering is: In a RenderCameraCigiSDLOSG plugin they handle the viewport and get the sceneView as such:osgUtil::SceneView *sceneView = viewport-getSceneView(); (would need to modify the current MPV code to get a hold of this) What I can get a hold of directly is: //= //! The camera matrices, one for each view. Each one of these is a //! complete modelview matrix. Retrieved from the blackboard. //! std::map int, osg::Matrix *cameraMatrixMap; //= //! Map containing the view group parameters (provides additional //! view transformation, etc). Retrieved from the blackboard. //! std::map int, ViewGroupParams * *viewGroupParamsMap; //= //! Map containing the view parameters (used for frustum setup, //! entity-following, etc). Retrieved from the blackboard. //! std::map int, XL::XLPtrView *viewMap; Again thanks for your help! Patrick Hi Patrick, osgPPU does use the camera only in to get its texture (so the texture to which the scene is rendered). You do not require a camera at all, you can use UnitTexture to provide osgPPU pipeline with any texture (or with the texture you get from MPV). To provide a texture you need some protocol to get the texture from MPV into osg::Texture container. Have you some link to the MPV, so that I can get more info about it? How are you managing the combination of osg and mpv? cheers Art, From what I can understand, it uses cameras, views and viewports. I believe mostly from the osgSDLView, but it also uses xlsignal? to pass the pointers around. The way MPV works at the hi level is that a single window is defined (per process). This window makes use a a viewer which possibly has multiple viewports. (I guess this is pretty normal...) The views are defined in a definition file and the information driving them comes through the CIGI protocol. Can I use the viewports and apply the osgPPU processors to it(them) or do I have to attach the processor Patrick Castonguay ___ 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] osgPPU vs RTT
Art, Here are the link to the MPV project: CIGI website: http://cigi.sourceforge.net/ MPV website: http://cigi.sourceforge.net/product_mpv.php From what I can see (and I am not an expert) there is no direct use of osg::Texture, UnitTexture or osg::Camera. It seems to me that osg::Geode, Geometry and StateSet is used most places where rendering is done. As well the scene graph looks something like this, before adding much data in there: RootNode EntityBranchNode Entities... TerrainBranchNode Terrain info... SkyBranchNode Sky info... If I do a sceneGraphDump when there a terrain and other stuff loaded I get a really long dump but I still can't see any information about cameras or such... What I do get from the MPV which is related to the rendering is: In a RenderCameraCigiSDLOSG plugin they handle the viewport and get the sceneView as such:osgUtil::SceneView *sceneView = viewport-getSceneView(); (would need to modify the current MPV code to get a hold of this) What I can get a hold of directly is: //= //! The camera matrices, one for each view. Each one of these is a //! complete modelview matrix. Retrieved from the blackboard. //! std::map int, osg::Matrix *cameraMatrixMap; //= //! Map containing the view group parameters (provides additional //! view transformation, etc). Retrieved from the blackboard. //! std::map int, ViewGroupParams * *viewGroupParamsMap; //= //! Map containing the view parameters (used for frustum setup, //! entity-following, etc). Retrieved from the blackboard. //! std::map int, XL::XLPtrView *viewMap; Again thanks for your help! Patrick Hi Patrick, osgPPU does use the camera only in to get its texture (so the texture to which the scene is rendered). You do not require a camera at all, you can use UnitTexture to provide osgPPU pipeline with any texture (or with the texture you get from MPV). To provide a texture you need some protocol to get the texture from MPV into osg::Texture container. Have you some link to the MPV, so that I can get more info about it? How are you managing the combination of osg and mpv? cheers Art, From what I can understand, it uses cameras, views and viewports. I believe mostly from the osgSDLView, but it also uses xlsignal? to pass the pointers around. The way MPV works at the hi level is that a single window is defined (per process). This window makes use a a viewer which possibly has multiple viewports. (I guess this is pretty normal...) The views are defined in a definition file and the information driving them comes through the CIGI protocol. Can I use the viewports and apply the osgPPU processors to it(them) or do I have to attach the processor Patrick Castonguay ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] osgPPU vs RTT-more
Art, As well looking into how the camera is handled, I could not find anywhere that uses osg::Camera, all of the camera references are using osg::Matrix which I am not sure how this behaves... Cheers ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] osgPPU vs RTT
Art, From what I can understand, it uses cameras, views and viewports. I believe mostly from the osgSDLView, but it also uses xlsignal? to pass the pointers around. The way MPV works at the hi level is that a single window is defined (per process). This window makes use a a viewer which possibly has multiple viewports. (I guess this is pretty normal...) The views are defined in a definition file and the information driving them comes through the CIGI protocol. Can I use the viewports and apply the osgPPU processors to it(them) or do I have to attach the processor Patrick Castonguay H: 613 435 2235 C: 613 325 1341 Technology Innovation Management (TIM) Student - Modeling and Simulation stream Carleton University, Ottawa, ON ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] osgPPU vs RTT
Hi Patrick, osgPPU does use the camera only in to get its texture (so the texture to which the scene is rendered). You do not require a camera at all, you can use UnitTexture to provide osgPPU pipeline with any texture (or with the texture you get from MPV). To provide a texture you need some protocol to get the texture from MPV into osg::Texture container. Have you some link to the MPV, so that I can get more info about it? How are you managing the combination of osg and mpv? cheers --- Patrick Castonguay [EMAIL PROTECTED] schrieb am Mo, 10.11.2008: Von: Patrick Castonguay [EMAIL PROTECTED] Betreff: [osg-users] osgPPU vs RTT An: osg-users@lists.openscenegraph.org Datum: Montag, 10. November 2008, 20:46 Art, From what I can understand, it uses cameras, views and viewports. I believe mostly from the osgSDLView, but it also uses xlsignal? to pass the pointers around. The way MPV works at the hi level is that a single window is defined (per process). This window makes use a a viewer which possibly has multiple viewports. (I guess this is pretty normal...) The views are defined in a definition file and the information driving them comes through the CIGI protocol. Can I use the viewports and apply the osgPPU processors to it(them) or do I have to attach the processor Patrick Castonguay H: 613 435 2235 C: 613 325 1341 Technology Innovation Management (TIM) Student - Modeling and Simulation stream Carleton University, Ottawa, ON ___ 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] osgPPU vs RTT
Hi Patrick. I am not familar with MPV, however let my try to help you ;) To let the ppu pipeline be applied for the complete scene, you have to provide it with a texture containing your scene as input. If you use the standard way, scene-osgPPU::Processor-osgPPU::Unit..., and attach a camera which views on your scene to the processor, then the camera output (which should be an RTT) will be provided into the pipeline. How is MPV handling scene rendering? Does it use osg's camera or does it render directly to some texture without camera intervention? If the second is true, then you can use UnitTexture as a root unit of your pipeline to provide your rendering texture into the pipeline. Best regards, Art --- Patrick Castonguay [EMAIL PROTECTED] schrieb am Do, 6.11.2008: Von: Patrick Castonguay [EMAIL PROTECTED] Betreff: [osg-users] osgPPU vs RTT An: osg-users@lists.openscenegraph.org Datum: Donnerstag, 6. November 2008, 20:38 Hi, I am trying to get osgPPU to work with the MPV project (a CIGI compliant IG)... I am having a little bit of a hard time figuring out how to get the two to talk to each other. As MPV is very modular and based on a plugin stucture, what I have to work with (so far) is the root node of the scene. The examples all have their own viewer that are used by PPU but I would like to stay away from that and just insert the pipeline to affect the intire scene (the displaying of the scene is handled by an other plugin inside MPV). Anybody have an idea of how could I attach a PPU pipeline to the scene? My other option is to not use osgPPU and start doing my own RTT, a little like Åsa Engvall is intending to do... Patrick Castonguay H: 613 435 2235 C: 613 325 1341 Technology Innovation Management (TIM) Student - Modeling and Simulation stream Carleton University, Ottawa, ON___ 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] osgPPU vs RTT
Hi, I am trying to get osgPPU to work with the MPV project (a CIGI compliant IG)... I am having a little bit of a hard time figuring out how to get the two to talk to each other. As MPV is very modular and based on a plugin stucture, what I have to work with (so far) is the root node of the scene. The examples all have their own viewer that are used by PPU but I would like to stay away from that and just insert the pipeline to affect the intire scene (the displaying of the scene is handled by an other plugin inside MPV). Anybody have an idea of how could I attach a PPU pipeline to the scene? My other option is to not use osgPPU and start doing my own RTT, a little like Åsa Engvall is intending to do... Patrick Castonguay H: 613 435 2235 C: 613 325 1341 Technology Innovation Management (TIM) Student - Modeling and Simulation stream Carleton University, Ottawa, ON___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
