Hi, On Sun, 2010-09-26 at 11:55 +0200, Weiyu Yi wrote: > Hello, > > I am using OpenSG with CUDA together, now there are some problems. > > Thanks > > 1)***************************************************** > > As I know, in OpenSG 1.8 there is a method getVBO(), with which the > user can get the buffer object id of the geometry. > > Is there any method like this in OpenSG 2.0? I have used roughly > looked through the code from 2.0 , there are such methods like: > > //------------------- > virtual GLenum getBufferType(void); // buffer type for VBOs > //------------------- > > in class OSGGeoVectorProperty and OSGGeoIntergralProperty > > but it offers only the type but no id > > 2) *************************************************** > > It's required that man has to explicitly make OpenSG use vbo or vbo is > automaticly activated?
have a look at http://github.com/vossg/OSGAddOnsGV the Compute subfolder contains an example to use OpenSG 2.x with VBO changing Cuda programms. The test program in Compute/SimpleCuda also contains some more variants to change the vbo data. If you have further questions let me know. In general you should do something like: pWin->validateGLObject(pnts->getGLId(), pEnv); OSG::UInt32 uiPntsVBOId = pWin->getGLObjectId(pnts->getGLId()); cRes = cudaGLRegisterBufferObject(uiPntsVBOId); if(cRes != cudaSuccess) { fprintf(stderr, "RegisterRes %d\n", OSG::UInt32(cRes)); } void *pMappedPoints = NULL; cRes = cudaGLMapBufferObject(&pMappedPoints, uiPntsVBOId); if(cRes != cudaSuccess) { fprintf(stderr, "MappedPtr, Res : %d\n", OSG::UInt32(cRes)); } . . your cuda computation here . . cRes = cudaGLUnmapBufferObject(uiPntsVBOId); if(cRes != cudaSuccess) { fprintf(stderr, "UnmapRes %d\n", OSG::UInt32(cRes)); } cRes = cudaGLUnregisterBufferObject(uiPntsVBOId); if(cRes != cudaSuccess) { fprintf(stderr, "UnRegisterRes %d\n", OSG::UInt32(cRes)); } where pnts is the GeoPnt3f property pointer. The only trick is to get this executed at the right place (you need the GL context). Check the test program for some variants of how to place this sequence correctly. Oh, and put OSG::setVBOUsageOnPropertyProtos(true); after your osgInit calls. This set the VBOUsage flags globally to on (the default is IIRC still off) so you don't have to worry about this when creating the properties. > 3) *************************************************** > > Is there any XML parser? In source code I have found XML tokenizer, > but from API there isn't any. Where in the source code ? IIRC, there should not be one in 2.x anymore, the 1.8 xml parts were not taken over as libxml2 / expat should be available either through the system installation (Linux) or the support libs build (Windows). Would you need the 1.8 xml support or are either libxml2 or expat ok for your needs. kind regards gerrit -- Gerrit Voß 盖瑞客 --------------------------------------------------- Centre for Advanced Media Technology (CAMTech) 南洋理工大学, Nanyang Technological University, (NTU) 新加坡, Singapore -------------------------------------------------- CAMTech is a joint centre of Fraunhofer-IGD & NTU -------------------------------------------------- If we communicate everything we ever think, speech just becomes static. And all of us become bores. J. Clarkson ------------------------------------------------------------------------------ Start uncovering the many advantages of virtual appliances and start using them to simplify application deployment and accelerate your shift to cloud computing. http://p.sf.net/sfu/novell-sfdev2dev _______________________________________________ Opensg-users mailing list Opensg-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/opensg-users
