Re: [osg-users] [ANN] The book OpenSceneGraph Design and Implementation is published
Hi Wang, any chance to see an english version of your book in the near future? Congratulation for your work, indeed. :) Regards, Andrea Negri Wang Rui wrote: Hi all, After 3 months of long waiting (from the SIGGRAPH to present), I am very pleased to announce that, the book /OpenSceneGraph Design and Implementation/, which is written by Wang Rui and Qian Xuelei and predicted on the OSG BOF, finally COMES OUT! Wang Rui and Qian Xuelei, OpenSceneGraph Design and Implementation, Tsinghua University Press, 2009.11; ISBN: 978-7-302-21303-1; Price: 45.00Yuan (about $6.6); Paperback, 377 pages. Please visit the Tsinghua University Press website for more information about this book: http://www.tup.com.cn/book/Showbook.asp?CPBH=033945-01DJ=45 http://www.tup.com.cn/book/Showbook.asp?CPBH=033945-01DJ=45 Chinese readers may order it from: http://product.dangdang.com/product.aspx?product_id=20732977 The book resource website: http://code.google.com/p/osgenginebook/ You may freely download the full examples source code and have an overview of them here. Hope the 38 very short examples may help you even without reading the book. I try to build the website Chinese-English bilingual, so don't worry about language limitations. :) More snapshots could be found at http://code.google.com/p/osgenginebook/ I’d like to thank Don Burns and Robert Osfield for their creative efforts to give birth to OpenSceneGraph, as well as over 1700 (maybe even more today?) members of the OSG core community and over 2400 members of the osgChina community, for their support and contribution all the time! Many thanks to Paul Martz of the Skew Matrix, for his tremendous passion for improving OSG documentations and great help on supporting the publication of this book. He also took time out of his busy schedule writing the foreword. Thanks to Wei Zhanying, Guan Yanling, Chen Xuexia and Su Yuyang of Beijing Geo-Vision, for providing all kinds of assistance to the author during writing. Thanks to Xiong Jian of Tsinghua University Press, Zhu Youhong of 3DVRI, Gao Feng of Appsoft, Xu Mingliang of Zhejiang University, CG Laboratory of Beijing Forestry University and Yang Shixing, Xiao Peng and He Sicong of the osgChina Team, for technical reviewing, providing images and examples, and contributing in some other way. Thanks to my co-author Dr. Qian Xuelei, for helping me finish some chapters and proofread the entire text. Finally, I should thank my parents Wang Lihang and Bao Ximei, and my fiancee Leng Qin. I could not have done this without their patience and moral support during the whole time. Best wishes, Wang Rui ___ 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] VBO's - lifetime.
Hi Nico, osgcamera -r Tetra.osg is failing due to issue with clean up of the buffer object pool. I have already tracked down a bug in the clean up of the texture object pool, and found the same problem in the buffer object pool and applied the same fix, but alas still the problem persists so there must be other problems lurking in the clean up of the buffer object code as well. I'll keep plugging away at it today. Robert. On Wed, Nov 25, 2009 at 8:06 PM, Nico Kruithof nicokruit...@gmail.com wrote: Hi Robert, Not too much good news I'm afraid. I tried my application and the osgcamera. I have to stop now. I might have some time to test tomorrow night (it's a private project for now). I attached the model I'm using. It loads fine in my application, but crashes when I close it. The osgcamera doesn't work either: osgcamerad.exe d:\tetra.osg GLBufferObjectSet::GLBufferObjectSet _profile._size=5248 GLBufferObjectSet::GLBufferObjectSet _profile._size=5184 Texture::TextureObjectManager::flushAllDeletedTextureObjects() _contextID=0 Texture::TextureObjectManager::discardAllDeletedTextureObjects() _contextID=0 _numActiveTextureObjects=0 osgcamerad.exe -j 3 d:\tetra.osg + New viewer GLBufferObjectSet::GLBufferObjectSet _profile._size=5248 GLBufferObjectSet::GLBufferObjectSet _profile._size=5184 Viewer ended -- Texture::TextureObjectManager::flushAllDeletedTextureObjects() _contextID=0 Texture::TextureObjectManager::discardAllDeletedTextureObjects() _contextID=0 _numActiveTextureObjects=0 + New viewer and crashes after the first viewer. I wrote down the callstack when the crash occurs in my application: void BufferObject::releaseGLObjects(State* state) const, with state == 0 void GLBufferObject::releaseGLBufferObject(unsigned int contextID, GLBufferObject* to), with contextID==0 void GLBufferObjectManager::releaseGLBufferObject(GLBufferObject* to) void GLBufferObjectSet::orphan(GLBufferObject* to) The osgcamera example with the slider doesn't work either. Again, the output is correct for the first renderer, but not for the second and third. Here is the output again: osgcamerad.exe -r 3 d:\glider.osg + New viewer Viewer ended -- Texture::TextureObjectManager::flushAllDeletedTextureObjects() _contextID=0 Texture::TextureObjectManager::discardAllDeletedTextureObjects() _contextID=0 _numActiveTextureObjects=0 + New viewer Viewer ended -- Texture::TextureObjectManager::flushAllDeletedTextureObjects() _contextID=0 Texture::TextureObjectManager::discardAllDeletedTextureObjects() _contextID=0 _numActiveTextureObjects=0 + New viewer Viewer ended -- Texture::TextureObjectManager::flushAllDeletedTextureObjects() _contextID=0 Texture::TextureObjectManager::discardAllDeletedTextureObjects() _contextID=0 _numActiveTextureObjects=0 osgcamerad.exe -r 3 --vbo d:\glider.osg + New viewer Enabling VBO Enabling VBO Enabling VBO Enabling VBO Enabling VBO Enabling VBO GLBufferObjectSet::GLBufferObjectSet _profile._size=13120 GLBufferObjectSet::GLBufferObjectSet _profile._size=640 Viewer ended -- Texture::TextureObjectManager::flushAllDeletedTextureObjects() _contextID=0 Texture::TextureObjectManager::discardAllDeletedTextureObjects() _contextID=0 _numActiveTextureObjects=0 + New viewer Enabling VBO Enabling VBO Enabling VBO Enabling VBO Enabling VBO Enabling VBO Warning: detected OpenGL error 'invalid value' at After Renderer::compile Viewer ended -- Texture::TextureObjectManager::flushAllDeletedTextureObjects() _contextID=0 Texture::TextureObjectManager::discardAllDeletedTextureObjects() _contextID=0 _numActiveTextureObjects=0 + New viewer Enabling VBO Enabling VBO Enabling VBO Enabling VBO Enabling VBO Enabling VBO Warning: detected OpenGL error 'invalid value' at After Renderer::compile Viewer ended -- Texture::TextureObjectManager::flushAllDeletedTextureObjects() _contextID=0 Texture::TextureObjectManager::discardAllDeletedTextureObjects() _contextID=0 _numActiveTextureObjects=0 osgcamerad.exe -r 3 --vbo --shared d:\glider.osg Enabling VBO Enabling VBO Enabling VBO Enabling VBO Enabling VBO Enabling VBO + New viewer GLBufferObjectSet::GLBufferObjectSet _profile._size=13120 GLBufferObjectSet::GLBufferObjectSet _profile._size=640 Viewer ended -- Texture::TextureObjectManager::flushAllDeletedTextureObjects() _contextID=0 Texture::TextureObjectManager::discardAllDeletedTextureObjects() _contextID=0 _numActiveTextureObjects=0 + New viewer Viewer ended --
Re: [osg-users] [osgOcean] Wake effects?
Hi Peter, Well this is really what the many weird and wonderful configurable options are for in OceanScene, nearly every effect can be turned off an on to suit the graphics card configuration. I think it's probably better to do it this way, rather than grouping them together to give the low,medium and high settings, as you can fine tune the rendering to suit the available hardware. The core water shader itself isn't so expensive, it's largely the pre render passes that bring down the frame rate and all of these can be turned off and on as desired. (I think) the problem with Tians card at the moment is that the water shader in the trunk has used up all the maximum number of uniforms permitted on nvidia 7 series card which use a version of glsl that I'm not 100% sure of. But I think this can be worked around, I just haven't got round to it yet (plus it's quite hard to test without a suitable card) K. 2009/11/26 Peter Bear th3fly...@gmail.com: Would it be possible to implement sort of a config option with 2 or more shaders for multiple quality levels? This would allow for the use of one shader if you have a more powerful card, or another shader for an older card. Peter -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=20395#20395 ___ 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] [build] How to properly use the OSG_GL3_AVAILABLE CMake option?
Hi John, On Wed, Nov 25, 2009 at 9:02 PM, John Price john.pric...@gmail.com wrote: My project is still in development and has a long term objective. My view is forward looking, so I am interested in embracing gl3 as development progresses. I am primarily developing for nVidia hardware, and am particularly interested in nVidia extensions to gl3 that they refer to as Bindness Graphics. nVidia states: Bindless Graphics refers to changes to OpenGL that can enable close to an order of magnitude improvement in the CPU-limitedness of graphics applications. Bindless Graphics has the following desirable properties: • The driver need not dereference a vertex buffer or constant buffer on the CPU in order for the GPU to use it. • Relieves the limits on how many buffer objects can be accessed at once by shaders • Buffer objects are accessed as C-style pointer dereferences in the shading language • Allows for dependent pointer fetches, enabling more complex scene graph structures to be built into buffer objects providing significant new flexibility in the use of shaders. Measurements have shown that bindless graphics can result in more than 7x speedup! I'm pretty curious about the bindless graphics extension, it would be great to reduce the CPU overhead of making lots of fine grained OpenGL calls. The 7x speed up is very very unlikely to be something you'll see though, my guess is that they probably had to really squeeze out a contrived example to produce that type of bottleneck with the old calls, with real world usage the speed up will far less and often will result in no speed up at all as the bottleneck is more often fill rate rather getting data to the GPU. For you own app I'd aks the simple question - is your bottleneck draw dispatch, if not then bindless graphics won't make any difference for you. Bindless graphics will complicate trying to manage code that works on both bindless and non bindless as the extensions not only affect the the GL calls doing dispatch of the data but also shaders, so you'd need to keep multiple sets of shaders to handle the different hardware/driver capabilities. So I'm keen to see bindless graphics make it's way into the OSG to help reduce the draw dispatch overhead, more important for GL3 now that display lists are no longer supported, but we should be realistic about the potential benefits/pitfalls. Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Custom code in OSG core
Hi Sukender,
So what you are after is a proxy Image class :-)
One possible tweak would be to enable th OSG to carry osg::Image which
have their FileName field set, but have their data set to null so they
contain no data. This is the easy part as you can do this right now -
the next bit is getting the OSG to handle these osg::Image objects
gracefully.
The issue of proxy image is something that the osg::Texture's
UnrefImageAfterApply could do with as it currently discards the whole
osg::Image, so later on when you try to save the model there is no
Image to provide the FileName to use to write to file you want to
write out.
So... this type of feature I can see having multiple uses beyond this
particular plugin and worthy of support into the core OSG.
Robert.
On Wed, Nov 25, 2009 at 10:26 PM, Sukender suky0...@free.fr wrote:
Hi Robert and Paul,
Oh, I'm sorry I shouldn't have written core OSG: it's maybe more in osg
plugins I guess...
I have to load huge models. By huge I mean a few thouthands triangles but GB
of textures. Of course loading such a model simply leads to a std::bad_alloc.
This is why I posted something about lazy textures/images on the mailing
list: I must load the model but I don't want all the textures to be loaded at
the same time. Depending on what I want to acheive I may need:
1. To leave textures unloaded, but I want writers plugins to do as if the
texture was loaded (= the writer simply says the texture is abcd.jpg).
2. To load low-res textures (or maybe not loaded at all), but I want hi-res
ones to be switched when needed, especially when writing.
I don't expect solutions to be suited for realtime rendering. I only need
those huge models to be loaded, then processed (= modifiy geometry without
touching the texture or vice-versa, modify only a part of the scene...) and
written to disk for future rendering.
I got a few ideas for these needs:
- Add a noTexture option to readers that stores somewhere the path of the
texture file, and add an option to writers to do as if the texture was
loaded (but only write to the file the path of the image). This is why I have
custom code in reader/writers. But this is clearly an ugly solution as I need
to modify each reader/writer.
- Create a lazy image, which is loaded only when accessing pixel data. But
I don't know if it's easy, and how to do it (as discussed in the
corresponding post).
And a final note: all my code is given to osg-submissions once stable... I
won't violate the OSGPL/LGPL :)
So... any idea? If I can acheive this without modifying OSG source code, then
I'd be very happpy...
Thank you.
Sukender
PVLE - Lightweight cross-platform game engine - http://pvle.sourceforge.net/
- Robert Osfield robert.osfi...@gmail.com a écrit :
Hi Sukender,
On Wed, Nov 25, 2009 at 2:26 PM, Sukender suky0...@free.fr wrote:
I'm trying to add custom code in some osg plugins (especially 3DS and
FBX). I often have to write things like:
ADD_DEFINITIONS(-DMY_CUSTOM_CODE) in CMakeLists.txt (or #define
MY_CUSTOM_CODE)
#ifdef MY_CUSTOM_CODE
...
#endif
- Can I submit such code (without the #define of course)?
- Do you think there could be a nicer way to isolate custom code?
- And finally, do you think this could be a good idea to have a CMake
option such as USER_DEFINES? And then:
FOREACH(CUR_DEFINE ${USER_DEFINES})
ADD_DEFINITIONS(-D${CUR_DEFINE})
ENDFOREACH()
The OSG isn't the place for custom code, both for a licensing issues,
build issues and maintenance issues. The question really should be
how to avoid need for custom code in the core OSG. The use of custom
code embedded in the OSG code would suggest that the OSG doesn't
support particular features, or isn't extensible enough, or just the
that code is tackled in the wrong way.
Could you enumerate what custom code you are wanting to put it and
why? Perhaps we can figure a way to avoid the need for it completely.
Robert.
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[osg-users] question on status of dae (collada) plugin
Hello world, I'm trying to load some collada files from osg, using osgviewer, recent trunk version on msvc8. I tried on those found on the collada-dom package (collada-dom/dom/test/1.4/data/*.dae ), but only one (cube.dae) is really loading. Some crash (segfault), some display an empty scene, and others don't find any scene at all. Aren't those data files considered as reference ones ? I also tried on some kml files (the google's format based on collada one), without success (even if I rename the .kml in .dae, of course): Warning: The DOM was unable to create an element named kml at line 15. Probably a schema violation. = is the dae plugin supposed to be usable, or is it in early development state (or am I badly using it) ? thanks for any information/confirmation ! Fred ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] help me with osg::Imagestream and osg::Image
On Thu, Nov 26, 2009 at 5:57 AM, Ivan Salguero r_kenshin...@hotmail.com wrote: yes yes but i execute osgmovie and it say me that i need a pluging what kind of pluging i need?? so it's weird because when i compile the code some libs las image and imagestream doesn't have some functions but .exe it's work correctly why happen that? You need a plugin to read the movie, such as the xine plugin under Linux, or the quicktime plugin under OSX/Windows, or the ffmpeg plugin now available in svn/trunk for all platforms. Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] IntersectVisitor does not recognize Nodes on different Projection
Hi Thorsten, Thorsten Werner schrieb: Hi, I've got a loaded model which is a child of the root. the second child of the root node is a ortho2d projection, which i use for the GUI. Now i've taken the example osgkeyboardmouse from the osg site and my problem is that it only catches intersections with the loaded model. Not with the Goedes which are at the Ortho2D ProjectionMatrix. double w(.05), h(.05); osgUtil::PolytopeIntersector* picker = new osgUtil::PolytopeIntersector( osgUtil::Intersector::PROJECTION, x-w, y-h, x+w, y+h); osgUtil::IntersectionVisitor iv(picker); viewer-getCamera()-accept(iv); this is how i configured the Visitor. I've tried to change the Intersector into a osg::Intersector::WINDOW. ut then absolutely nothing happens anymore. What kind of primitives are you trying to pick? For Triangles/Quads it is more efficient to use the LineSegementIntersector (which is the default when you start osgkeyboardmouse, you can toggle using 'p'). The osgpick example always uses the LineSegementIntersector. Assuming you want to use PolytopeIntersector, I have to say that it not work well when Projections are involved. To fix that properly we might need a completely different approach. As a workaround you could try to call PolytopeIntersector on your (unprojected) HUD-Node directly and see if it helps. Thanks in advance. Cheers, Thorsten Cheers Peter -- Vorstand/Board of Management: Dr. Bernd Finkbeiner, Dr. Roland Niemeier, Dr. Arno Steitz, Dr. Ingrid Zech Vorsitzender des Aufsichtsrats/ Chairman of the Supervisory Board: Michel Lepert 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] how to suspend rendering context thread
Hi Forest. Your question fits better in a forum for MFC or Windows programming. You can use the Win32 API function GetForegroundWindow to see which window has the focus or you can use GetWindowPlacement to get the state about a specific window. You should also consider using on-demand rendering mode in OSG to reduce the CPU usage. Search for it in this mailing list or visit the OSG blog to see what it is. Good luck! Best regards Jakob Ruhe 2009/11/25 forest fores...@163.com: hi all, When I use osgMFCViewer, I create multiple rendering context,that's to say there are many HWND, each HWND is related to one Render thread ,so much CPU resource is taken up. This is what I want to do: When one viewport is maximazed, the others will be hidden ,so these hidden context do not need continue the rendering. I want to suspend and resume some rendering thread depends on message CWnd::OnSize(UINT nType, int cx, int cy ). I checked the MSDN and find that the parameter nType can be one of the following values SIZE_MAXIMIZED Window has been maximized. SIZE_MINIMIZED Window has been minimized. SIZE_RESTORED Window has been resized, but neither SIZE_MINIMIZED nor SIZE_MAXIMIZED applies. SIZE_MAXHIDE Message is sent to all pop-up windows when some other window is maximized. SIZE_MAXSHOW Message is sent to all pop-up windows when some other window has been restored to its former size. My problem is that I never get SIZE_MAXHIDE or SIZE_MAXSHOW message. Is there anyone who has used SIZE_MAXHIDE or SIZE_MAXSHOW message? Or is there any other way to reduce the CPU resource usage？ thanks in advance best regards forest ___ 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] [ANN] The book OpenSceneGraph Design and Implementation is published
Thanks Wang, But is there anyone who is OSG user and knows Chinese and wants to translate this book to english in the future? :) Or will you translate it to make it more universe? Regards. Ümit Uzun 2009/11/26 Andrea Negri andrea.ne...@gmail.com Hi Wang, any chance to see an english version of your book in the near future? Congratulation for your work, indeed. :) Regards, Andrea Negri Wang Rui wrote: Hi all, After 3 months of long waiting (from the SIGGRAPH to present), I am very pleased to announce that, the book /OpenSceneGraph Design and Implementation/, which is written by Wang Rui and Qian Xuelei and predicted on the OSG BOF, finally COMES OUT! Wang Rui and Qian Xuelei, OpenSceneGraph Design and Implementation, Tsinghua University Press, 2009.11; ISBN: 978-7-302-21303-1; Price: 45.00Yuan (about $6.6); Paperback, 377 pages. Please visit the Tsinghua University Press website for more information about this book: http://www.tup.com.cn/book/Showbook.asp?CPBH=033945-01DJ=45 http://www.tup.com.cn/book/Showbook.asp?CPBH=033945-01DJ=45 Chinese readers may order it from: http://product.dangdang.com/product.aspx?product_id=20732977 The book resource website: http://code.google.com/p/osgenginebook/ You may freely download the full examples source code and have an overview of them here. Hope the 38 very short examples may help you even without reading the book. I try to build the website Chinese-English bilingual, so don't worry about language limitations. :) More snapshots could be found at http://code.google.com/p/osgenginebook/ I’d like to thank Don Burns and Robert Osfield for their creative efforts to give birth to OpenSceneGraph, as well as over 1700 (maybe even more today?) members of the OSG core community and over 2400 members of the osgChina community, for their support and contribution all the time! Many thanks to Paul Martz of the Skew Matrix, for his tremendous passion for improving OSG documentations and great help on supporting the publication of this book. He also took time out of his busy schedule writing the foreword. Thanks to Wei Zhanying, Guan Yanling, Chen Xuexia and Su Yuyang of Beijing Geo-Vision, for providing all kinds of assistance to the author during writing. Thanks to Xiong Jian of Tsinghua University Press, Zhu Youhong of 3DVRI, Gao Feng of Appsoft, Xu Mingliang of Zhejiang University, CG Laboratory of Beijing Forestry University and Yang Shixing, Xiao Peng and He Sicong of the osgChina Team, for technical reviewing, providing images and examples, and contributing in some other way. Thanks to my co-author Dr. Qian Xuelei, for helping me finish some chapters and proofread the entire text. Finally, I should thank my parents Wang Lihang and Bao Ximei, and my fiancee Leng Qin. I could not have done this without their patience and moral support during the whole time. Best wishes, Wang Rui ___ 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] [osgOcean] Wake effects?
Hi Kim: Thanks for your helpful work! Does the information inf file ocean_output.txt help? Regards, Tian Kim Bale wrote: Hi Peter, Well this is really what the many weird and wonderful configurable options are for in OceanScene, nearly every effect can be turned off an on to suit the graphics card configuration. I think it's probably better to do it this way, rather than grouping them together to give the low,medium and high settings, as you can fine tune the rendering to suit the available hardware. The core water shader itself isn't so expensive, it's largely the pre render passes that bring down the frame rate and all of these can be turned off and on as desired. (I think) the problem with Tians card at the moment is that the water shader in the trunk has used up all the maximum number of uniforms permitted on nvidia 7 series card which use a version of glsl that I'm not 100% sure of. But I think this can be worked around, I just haven't got round to it yet (plus it's quite hard to test without a suitable card) K. 2009/11/26 Peter Bear : Would it be possible to implement sort of a config option with 2 or more shaders for multiple quality levels? This would allow for the use of one shader if you have a more powerful card, or another shader for an older card. Peter -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=20395#20395 ___ osg-users mailing list http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org -- Post generated by Mail2Forum -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=20410#20410 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] [ANN] The book OpenSceneGraph Design and Implementation is published
Hi Wang and felicitations, I've had a very quick look at the sample and they are pretty good. Illustrating each particular point very clearly. I really miss reading Chinese, if you have any chance to translate the book, I'll be interested too. Regards, Pierre. Le jeudi 26 novembre 2009 à 10:17 +0100, Andrea Negri a écrit : Hi Wang, any chance to see an english version of your book in the near future? Congratulation for your work, indeed. :) Regards, Andrea Negri Wang Rui wrote: Hi all, After 3 months of long waiting (from the SIGGRAPH to present), I am very pleased to announce that, the book /OpenSceneGraph Design and Implementation/, which is written by Wang Rui and Qian Xuelei and predicted on the OSG BOF, finally COMES OUT! Wang Rui and Qian Xuelei, OpenSceneGraph Design and Implementation, Tsinghua University Press, 2009.11; ISBN: 978-7-302-21303-1; Price: 45.00Yuan (about $6.6); Paperback, 377 pages. Please visit the Tsinghua University Press website for more information about this book: http://www.tup.com.cn/book/Showbook.asp?CPBH=033945-01DJ=45 http://www.tup.com.cn/book/Showbook.asp?CPBH=033945-01DJ=45 Chinese readers may order it from: http://product.dangdang.com/product.aspx?product_id=20732977 The book resource website: http://code.google.com/p/osgenginebook/ You may freely download the full examples source code and have an overview of them here. Hope the 38 very short examples may help you even without reading the book. I try to build the website Chinese-English bilingual, so don't worry about language limitations. :) More snapshots could be found at http://code.google.com/p/osgenginebook/ I’d like to thank Don Burns and Robert Osfield for their creative efforts to give birth to OpenSceneGraph, as well as over 1700 (maybe even more today?) members of the OSG core community and over 2400 members of the osgChina community, for their support and contribution all the time! Many thanks to Paul Martz of the Skew Matrix, for his tremendous passion for improving OSG documentations and great help on supporting the publication of this book. He also took time out of his busy schedule writing the foreword. Thanks to Wei Zhanying, Guan Yanling, Chen Xuexia and Su Yuyang of Beijing Geo-Vision, for providing all kinds of assistance to the author during writing. Thanks to Xiong Jian of Tsinghua University Press, Zhu Youhong of 3DVRI, Gao Feng of Appsoft, Xu Mingliang of Zhejiang University, CG Laboratory of Beijing Forestry University and Yang Shixing, Xiao Peng and He Sicong of the osgChina Team, for technical reviewing, providing images and examples, and contributing in some other way. Thanks to my co-author Dr. Qian Xuelei, for helping me finish some chapters and proofread the entire text. Finally, I should thank my parents Wang Lihang and Bao Ximei, and my fiancee Leng Qin. I could not have done this without their patience and moral support during the whole time. Best wishes, Wang Rui ___ 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 Pierre BOURDIN I.M.E.R.I.R. Av. Pascot BP 90443 66004 PERPIGNAN tél: 04 68 56 84 95 fax: 04 68 55 03 86 email: bour...@imerir.com ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] [ANN] The book OpenSceneGraph Design and Implementation is published
Dear Wang, I just wanted to add a small question off the mailing-list. I've seen in the mail, you have been collaborating with many Chinese Universities among which some people of the Beijing Forestry University... I am just starting a project about Virtual Landscape Visualization with Xavier Pueyo from the University of Girona (SPAIN) and Marc Jaeger from the CIRAD (France), and other partners... I know Marc Jaeger is working with a lot with Chinese Partners, since he was one of the joint Director of the LIAMA (Sino/French Laboratory for Computer Sciences: http://liama.ia.ac.cn/wiki/) Could you be interested in collaborating with us on an international project on the topic of Landscape Visualisation ? Nothing is started yet, but we are already looking for partners. Regards, Pierre. Le jeudi 26 novembre 2009 à 10:28 +0800, Wang Rui a écrit : Hi all, After 3 months of long waiting (from the SIGGRAPH to present), I am very pleased to announce that, the book OpenSceneGraph Design and Implementation, which is written by Wang Rui and Qian Xuelei and predicted on the OSG BOF, finally COMES OUT! Wang Rui and Qian Xuelei, OpenSceneGraph Design and Implementation, Tsinghua University Press, 2009.11; ISBN: 978-7-302-21303-1; Price: 45.00Yuan (about $6.6); Paperback, 377 pages. Please visit the Tsinghua University Press website for more information about this book: http://www.tup.com.cn/book/Showbook.asp?CPBH=033945-01DJ=45 Chinese readers may order it from: http://product.dangdang.com/product.aspx?product_id=20732977 The book resource website: http://code.google.com/p/osgenginebook/ You may freely download the full examples source code and have an overview of them here. Hope the 38 very short examples may help you even without reading the book. I try to build the website Chinese-English bilingual, so don't worry about language limitations. :) More snapshots could be found at http://code.google.com/p/osgenginebook/ I’d like to thank Don Burns and Robert Osfield for their creative efforts to give birth to OpenSceneGraph, as well as over 1700 (maybe even more today?) members of the OSG core community and over 2400 members of the osgChina community, for their support and contribution all the time! Many thanks to Paul Martz of the Skew Matrix, for his tremendous passion for improving OSG documentations and great help on supporting the publication of this book. He also took time out of his busy schedule writing the foreword. Thanks to Wei Zhanying, Guan Yanling, Chen Xuexia and Su Yuyang of Beijing Geo-Vision, for providing all kinds of assistance to the author during writing. Thanks to Xiong Jian of Tsinghua University Press, Zhu Youhong of 3DVRI, Gao Feng of Appsoft, Xu Mingliang of Zhejiang University, CG Laboratory of Beijing Forestry University and Yang Shixing, Xiao Peng and He Sicong of the osgChina Team, for technical reviewing, providing images and examples, and contributing in some other way. Thanks to my co-author Dr. Qian Xuelei, for helping me finish some chapters and proofread the entire text. Finally, I should thank my parents Wang Lihang and Bao Ximei, and my fiancee Leng Qin. I could not have done this without their patience and moral support during the whole time. Best wishes, Wang Rui ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org Pierre BOURDIN I.M.E.R.I.R. Av. Pascot BP 90443 66004 PERPIGNAN tél: 04 68 56 84 95 fax: 04 68 55 03 86 email: bour...@imerir.com ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] [osgOcean] Wake effects?
Hi Tian, It did highlight some useful stuff. Unfortunately I won't get round to fixing this immediately. However, if you want to use the version in the trunk you can probably get round it by replacing the uniform booleans one by one with hard coded values in the water shader for the options you want to enable until it stop complaining. Obviously this is a temporary fix until I get round to investigating further. K. 2009/11/26 Tian Ma tianxiao...@foxmail.com: Hi Kim: Thanks for your helpful work! Does the information inf file ocean_output.txt help? Regards, Tian Kim Bale wrote: Hi Peter, Well this is really what the many weird and wonderful configurable options are for in OceanScene, nearly every effect can be turned off an on to suit the graphics card configuration. I think it's probably better to do it this way, rather than grouping them together to give the low,medium and high settings, as you can fine tune the rendering to suit the available hardware. The core water shader itself isn't so expensive, it's largely the pre render passes that bring down the frame rate and all of these can be turned off and on as desired. (I think) the problem with Tians card at the moment is that the water shader in the trunk has used up all the maximum number of uniforms permitted on nvidia 7 series card which use a version of glsl that I'm not 100% sure of. But I think this can be worked around, I just haven't got round to it yet (plus it's quite hard to test without a suitable card) K. 2009/11/26 Peter Bear : Would it be possible to implement sort of a config option with 2 or more shaders for multiple quality levels? This would allow for the use of one shader if you have a more powerful card, or another shader for an older card. Peter -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=20395#20395 ___ osg-users mailing list http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org -- Post generated by Mail2Forum -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=20410#20410 ___ 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] [3rdparty] osg::Image chosen library
Hi, hopefully someone will be able to help as this has been doing my head in. Is there any way to force the library which osg::Image uses when opening a file as I am having issues when trying to load a .png file and it is not using osgdb_png. Many Thanks Ant -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=20414#20414 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] OT: GLSL syntax highlighting for VS2008
Hello all, The lack of glsl syntax highlighting has always bugged me in visual studio, there were a number of workarounds that sort of worked but they all had their problems. So I thought I'd share this link I found today for pretty decent syntax highlighter plugin for visual studio 2008, I'm sure some of you will find it useful :) http://nshader.codeplex.com/ Regards, Kim. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] question on status of dae (collada) plugin
Frederic Marmond wrote: Hello world, I'm trying to load some collada files from osg, using osgviewer, recent trunk version on msvc8. I tried on those found on the collada-dom package (collada-dom/dom/test/1.4/data/*.dae ), but only one (cube.dae) is really loading. Some crash (segfault), some display an empty scene, and others don't find any scene at all. Aren't those data files considered as reference ones ? I also tried on some kml files (the google's format based on collada one), without success (even if I rename the .kml in .dae, of course): Warning: The DOM was unable to create an element named kml at line 15. Probably a schema violation. = is the dae plugin supposed to be usable, or is it in early development state (or am I badly using it) ? thanks for any information/confirmation ! Fred Fred, The dae reader should be stable, it has not had any changes made to it since the osg 2.8.2 release which is working for me. All the new development work on it is being being done in a separate repository. It certainly should not crash. The data files in the Collada respository should mostly work although I have not checked them recently, and strangely some of them were in the past not fully compliant Collada and might still be! Google KML files are not Collada .dae files and will not work! However Google KMZ archive files usually do contain Collada .dae files. The .kmz files are really .zip archives and if you rename the .kmz extension to .zip you can then run a standard zip archive tool to extract the .dae file from them. I suspect that your build of the OSG Collada plugin has a problem. One thing you should check is that you have linked against the dom libraries that implement the 1.4 version of the Collada specification not the 1.5 version. I link against libcollada14dom22 (that is Collada specification version 1.4 dom library version 2.2). Roger ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] VBO's - lifetime.
Hi Nico, I've tracked down issues with both the clean up of the texture object pool and buffer object pool that has required introduction of some new methods for cleanup. I have checked into svn/trunk the initial cut of this code, it enables osgcamera -r 5 tetra.osg to work just fine, as well as a range of other test models. The new code is only provisional though - it outputs lots of debug info the console, and isn't yet tidied up and completed, it is however, far enough along to warrant wider testing. Could you check out OSG svn/trunk and then test this against your app and let me know how you get on. Thanks, Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] CompositeViewer context cleanup and missing textures
Hi J.P, I have done a lot more investigation in the context clean up issues and have checked in a provisional fix for the issues. Could you please do an svn update and then test against your own applications to see if things are fixed. The code I've just checked in still has lots of debug info in place, and I haven't completed all parts of the work, through this afternoon I'll work on cleaning it up, but right now it should in a good enough state to test out. Could you do this against your app and let me know how you get on. Cheers, Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] [3rdparty] osg::Image chosen library
Looks like I found my answer reading through the documentation. In case anyone is interested I just had to specify in the constructor [code]osgDB::Registry::instance()-createLibraryNameForFile(x.png);[/code] Cheers anyway -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=20419#20419 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] VBO's - lifetime.
Sure, I'll do that tonight. Thanks a lot for looking into this. -- Nico On Thu, Nov 26, 2009 at 1:36 PM, Robert Osfield robert.osfi...@gmail.comwrote: Hi Nico, I've tracked down issues with both the clean up of the texture object pool and buffer object pool that has required introduction of some new methods for cleanup. I have checked into svn/trunk the initial cut of this code, it enables osgcamera -r 5 tetra.osg to work just fine, as well as a range of other test models. The new code is only provisional though - it outputs lots of debug info the console, and isn't yet tidied up and completed, it is however, far enough along to warrant wider testing. Could you check out OSG svn/trunk and then test this against your app and let me know how you get on. Thanks, 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
[osg-users] imageio problems and possible solutions on loading some PNG images.
Hi there, I have two problems in drawing PNG image using imageio on Mac OS X. One problem is that 16-bit grayscale textures (PNG images) cannot be loaded due to the following errors: Error: CGBitmapContextCreate: unsupported parameter combination: 8 integer bits/component; 16 bits/pixel; 1-component colorspace; kCGImageAlphaLast; 512 bytes/row. Error: CGContextDrawImage: invalid context The cause of this is that CGBitmapContextCreate doesn't accept the combination of 1 component colorspace and 16bps. One solution I can think of at this moment is to create a bitmap context using RGBA colorspace (as the same as the 32bit RGBA image). This works fine on FlightGear but I'm not so sure if this works on all 16bpp images. Another problem is that imageio's libpng doesn't properly handle transparency in PNG file. The problem I have is that the transparency in PNG files are not at all handled and we see a lot of unexpected black or dark portions. I strongly recommend the use of osgdb_png.so (or .dylib) for handling png images instead of imageio. More detail explanation, screenshots, and an experimental patch for solving these two problems are available from: http://macflightgear.sourceforge.net/home/development-notes/devnote-nov-26-2009 Please try my patch and see if it also works on many OSG applications. FYI, I'm using OSG/svn as of a few day back on Mac OS 10.5.8 / intel. Best, Tat ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] question on status of dae (collada) plugin
Hi Roger, In fact, I based my build on this 'howto' : http://www.openscenegraph.org/projects/osg/wiki/Support/KnowledgeBase/Collada where it is suggested to rename the .kml to .dae Maybe this doc is wrong or outdated ? (by the way, the page is currently unaccessible...) Ok, reading .dae from other locations than collada-dom package works better :) thanks! Fred On Thu, Nov 26, 2009 at 1:21 PM, Roger James ro...@beardandsandals.co.uk wrote: Frederic Marmond wrote: Hello world, I'm trying to load some collada files from osg, using osgviewer, recent trunk version on msvc8. I tried on those found on the collada-dom package (collada-dom/dom/test/1.4/data/*.dae ), but only one (cube.dae) is really loading. Some crash (segfault), some display an empty scene, and others don't find any scene at all. Aren't those data files considered as reference ones ? I also tried on some kml files (the google's format based on collada one), without success (even if I rename the .kml in .dae, of course): Warning: The DOM was unable to create an element named kml at line 15. Probably a schema violation. = is the dae plugin supposed to be usable, or is it in early development state (or am I badly using it) ? thanks for any information/confirmation ! Fred Fred, The dae reader should be stable, it has not had any changes made to it since the osg 2.8.2 release which is working for me. All the new development work on it is being being done in a separate repository. It certainly should not crash. The data files in the Collada respository should mostly work although I have not checked them recently, and strangely some of them were in the past not fully compliant Collada and might still be! Google KML files are not Collada .dae files and will not work! However Google KMZ archive files usually do contain Collada .dae files. The .kmz files are really .zip archives and if you rename the .kmz extension to .zip you can then run a standard zip archive tool to extract the .dae file from them. I suspect that your build of the OSG Collada plugin has a problem. One thing you should check is that you have linked against the dom libraries that implement the 1.4 version of the Collada specification not the 1.5 version. I link against libcollada14dom22 (that is Collada specification version 1.4 dom library version 2.2). Roger ___ 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] Problem with Camera::inheritCullSettings
HI Paul, My inclination would be to add an extra CullSettings inheritance mask value for inheriting the ClearMask - as this would fit the way that other variables are inherited down. As for the naming of inheritCullSettings, I do also feel that it's not perfect for conveying what it does, as ordinarily we would think of cull to do just with scene graph traversal, rather than traversal of the topmost Camera. However, in implementation these settings control what happens in the cull phase, and this does encompass traversal of cameras as well as the scene graph. Given this I think it's not too bad a naming. Robert. On Wed, Nov 25, 2009 at 5:13 PM, Paul Martz pma...@skew-matrix.com wrote: Hi Robert -- I've encountered a problem with how parent Camera values inherit down to slave Cameras, and wanted to discuss it before I launched into coding a fix. Quick summary: master Camera clear mask doesn't inherit down to slave Cameras. As a workaround, I can loop over slave Cameras and set the clear mask manually. Example use case: On a multidisplay system, create a Viewer configured to setUpViewAcrossAllDisplays. Get the Viewer's Camera, set the clear color to blue and set the clear mask to 0. Then call run. The windows incorrectly clear to blue -- they shouldn't clear at all, because the clear mask is set to 0. I managed to divine that slave Cameras get their clear colors set in Camera::inheritCullSettings, if the CLEAR_COLOR bit is set. If I modify this code to also copy the master Camera clear mask down to the slave Camera, then I get the expected result (no clearing occurs). It seems like there are two ways to fix this: One is to just piggyback clear mask onto the CLEAR_COLOR bit, or we could also add another bit specifically for clear mask. The second way, I'm not sure about. But the name inheritCullSettings fails to imply that clear color, possibly clear mask, read buffer, and draw buffer are all set in that function. So I wonder if inheritCullSettings is the right place to inherit these values? Or should master-to-slave value setting be done somewhere else? I'd appreciate your input on this, and I'd be glad to code a solution if you can provide some direction. Thanks. -- Paul Martz Skew Matrix Software LLC _http://www.skew-matrix.com_ http://www.skew-matrix.com/ +1 303 859 9466 ___ 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] question on status of dae (collada) plugin
Roger James ro...@beardandsandals.co.uk wrote: Frederic Marmond wrote: Hello world, I'm trying to load some collada files from osg, using osgviewer, recent trunk version on msvc8. I tried on those found on the collada-dom package (collada-dom/dom/test/1.4/data/*.dae ), but only one (cube.dae) is really loading. Some crash (segfault), some display an empty scene, and others don't find any scene at all. Aren't those data files considered as reference ones ? The plugin works ok for me, but make sure that the transparency in your files is correct. It is likely that it was exported wrong (reversed) and the scene is actually displayed, but all transparent. E.g. the default Blender plugin and Google Sketchup export it incorrectly reversed. An easy way to check for this is to use osgconv and convert the dae file into an osg file - if the data are there but you cannot see them, it is the transparency problem. Regards, Jan signature.asc Description: This is a digitally signed message part. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] imageio problems and possible solutions on loading some PNG images.
HI Tat, I don't have a OSX system to test against personally, but for those who do have OSX and wish to help investigate this bug with the imageio plugin it would be worth putting together a small set of test images that you see problems so that they can reproduce the problem themselves. Also if we can settle upon an existing OSG example or a small mod to one that can help illustrate the issue then this would also help. For instance do you see the problem if you do something as simple as: osgviewer --image myimage.png Cheers, Robert. On Thu, Nov 26, 2009 at 1:12 PM, Tatsuhiro Nishioka tat.fgmac...@gmail.com wrote: Hi there, I have two problems in drawing PNG image using imageio on Mac OS X. One problem is that 16-bit grayscale textures (PNG images) cannot be loaded due to the following errors: Error: CGBitmapContextCreate: unsupported parameter combination: 8 integer bits/component; 16 bits/pixel; 1-component colorspace; kCGImageAlphaLast; 512 bytes/row. Error: CGContextDrawImage: invalid context The cause of this is that CGBitmapContextCreate doesn't accept the combination of 1 component colorspace and 16bps. One solution I can think of at this moment is to create a bitmap context using RGBA colorspace (as the same as the 32bit RGBA image). This works fine on FlightGear but I'm not so sure if this works on all 16bpp images. Another problem is that imageio's libpng doesn't properly handle transparency in PNG file. The problem I have is that the transparency in PNG files are not at all handled and we see a lot of unexpected black or dark portions. I strongly recommend the use of osgdb_png.so (or .dylib) for handling png images instead of imageio. More detail explanation, screenshots, and an experimental patch for solving these two problems are available from: http://macflightgear.sourceforge.net/home/development-notes/devnote-nov-26-2009 Please try my patch and see if it also works on many OSG applications. FYI, I'm using OSG/svn as of a few day back on Mac OS 10.5.8 / intel. Best, Tat ___ 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] [ANN] The book OpenSceneGraph Design and Implementation is published
Hi guys, I'd like to help translate my book or any other materials into English, at any time. But a major problem is, the copyright holder of this book is Tsinghua University Press, and it may be inappropriate to publish it under CC license or any other free ones again. Do you think that we could contact with any presses in the USA to import this book? Regards, Wang Rui 2009/11/26 Ümit Uzun umituzu...@gmail.com Thanks Wang, But is there anyone who is OSG user and knows Chinese and wants to translate this book to english in the future? :) Or will you translate it to make it more universe? Regards. Ümit Uzun 2009/11/26 Andrea Negri andrea.ne...@gmail.com Hi Wang, any chance to see an english version of your book in the near future? Congratulation for your work, indeed. :) Regards, Andrea Negri Wang Rui wrote: Hi all, After 3 months of long waiting (from the SIGGRAPH to present), I am very pleased to announce that, the book /OpenSceneGraph Design and Implementation/, which is written by Wang Rui and Qian Xuelei and predicted on the OSG BOF, finally COMES OUT! Wang Rui and Qian Xuelei, OpenSceneGraph Design and Implementation, Tsinghua University Press, 2009.11; ISBN: 978-7-302-21303-1; Price: 45.00Yuan (about $6.6); Paperback, 377 pages. Please visit the Tsinghua University Press website for more information about this book: http://www.tup.com.cn/book/Showbook.asp?CPBH=033945-01DJ=45 http://www.tup.com.cn/book/Showbook.asp?CPBH=033945-01DJ=45 Chinese readers may order it from: http://product.dangdang.com/product.aspx?product_id=20732977 The book resource website: http://code.google.com/p/osgenginebook/ You may freely download the full examples source code and have an overview of them here. Hope the 38 very short examples may help you even without reading the book. I try to build the website Chinese-English bilingual, so don't worry about language limitations. :) More snapshots could be found at http://code.google.com/p/osgenginebook/ I’d like to thank Don Burns and Robert Osfield for their creative efforts to give birth to OpenSceneGraph, as well as over 1700 (maybe even more today?) members of the OSG core community and over 2400 members of the osgChina community, for their support and contribution all the time! Many thanks to Paul Martz of the Skew Matrix, for his tremendous passion for improving OSG documentations and great help on supporting the publication of this book. He also took time out of his busy schedule writing the foreword. Thanks to Wei Zhanying, Guan Yanling, Chen Xuexia and Su Yuyang of Beijing Geo-Vision, for providing all kinds of assistance to the author during writing. Thanks to Xiong Jian of Tsinghua University Press, Zhu Youhong of 3DVRI, Gao Feng of Appsoft, Xu Mingliang of Zhejiang University, CG Laboratory of Beijing Forestry University and Yang Shixing, Xiao Peng and He Sicong of the osgChina Team, for technical reviewing, providing images and examples, and contributing in some other way. Thanks to my co-author Dr. Qian Xuelei, for helping me finish some chapters and proofread the entire text. Finally, I should thank my parents Wang Lihang and Bao Ximei, and my fiancee Leng Qin. I could not have done this without their patience and moral support during the whole time. Best wishes, Wang Rui ___ 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] [ANN] The book OpenSceneGraph Design and Implementation is published
Hi Wang Rui, First up, congrats on the new book ;-) On Thu, Nov 26, 2009 at 2:13 PM, Wang Rui wangra...@gmail.com wrote: I'd like to help translate my book or any other materials into English, at any time. But a major problem is, the copyright holder of this book is Tsinghua University Press, and it may be inappropriate to publish it under CC license or any other free ones again. Do you think that we could contact with any presses in the USA to import this book? We currently publish the Quick Start Guide using Lulu.com, Lulu prints books to order, and all you need to do to upload your pdf document for them to print. Might this be possible? Tsinghua University Press should be able to retain the copyright and all revenue through Lulu. Cheers, Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] [ANN] The book OpenSceneGraph Design and Implementation is published
Hello Wang Rui, After 3 months of long waiting (from the SIGGRAPH to present), I am very pleased to announce that, the book /OpenSceneGraph Design and Implementation/, which is written by Wang Rui and Qian Xuelei and predicted on the OSG BOF, finally COMES OUT! Great work on getting your book out! I was glad to hear about so much involvement in the OSG community in China at the BOF this year, and it's great to see that this knowledge is being shared to a wide audience. I also hope you can get it translated to English, but I will probably order a Chinese copy anyways as enocuragement! But why didn't Paul write his preface in Mandarin? :-) http://osgenginebook.googlecode.com/svn/tags/images/preface.jpg It was nice to meet you at the BOF as well, hope to see you again next year to announce the English translation (I can hope :-) ) Again, great work, keep it up. J-S -- __ Jean-Sebastien Guayjean-sebastien.g...@cm-labs.com 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
Re: [osg-users] [ANN] The book OpenSceneGraph Design and Implementation is published
Hi again Wang Rui, I just went to the product page on dangdang.com, and it seems it's out of stock? http://product.dangdang.com/product.aspx?product_id=20732977 http://translate.google.com/translate?js=yprev=_thl=enie=UTF-8u=http%3A%2F%2Fproduct.dangdang.com%2Fproduct.aspx%3Fproduct_id%3D20732977sl=zh-CNtl=en I hope you can help me order a copy of your book :-) J-S -- __ Jean-Sebastien Guayjean-sebastien.g...@cm-labs.com 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
Re: [osg-users] [ANN] The book OpenSceneGraph Design and Implementation is published
Hi Pierre, Is the project open source? Or just funded by some companies or organizations? I'd like to always work with open source teams with passion and without any price. :) Otherwise, I would be glad to help after ensuring that it won't affect my current work too much. I'm working for Beijing Geo-Vision Co. (www.jx4.com) as a 3d GIS software engineer. Wang Rui 2009/11/26 Pierre Bourdin (gmail) bour...@imerir.com Dear Wang, I just wanted to add a small question off the mailing-list. I've seen in the mail, you have been collaborating with many Chinese Universities among which some people of the Beijing Forestry University... I am just starting a project about Virtual Landscape Visualization with Xavier Pueyo from the University of Girona (SPAIN) and Marc Jaeger from the CIRAD (France), and other partners... I know Marc Jaeger is working with a lot with Chinese Partners, since he was one of the joint Director of the LIAMA (Sino/French Laboratory for Computer Sciences: http://liama.ia.ac.cn/wiki/) Could you be interested in collaborating with us on an international project on the topic of Landscape Visualisation ? Nothing is started yet, but we are already looking for partners. Regards, Pierre. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] [ANN] The book OpenSceneGraph Design and Implementation is published
Hi Robert, Thanks for your information. Tomorrow I will ask Tsinghua University Press if it possible. Cheers, Wang Rui 2009/11/26 Robert Osfield robert.osfi...@gmail.com We currently publish the Quick Start Guide using Lulu.com, Lulu prints books to order, and all you need to do to upload your pdf document for them to print. Might this be possible? Tsinghua University Press should be able to retain the copyright and all revenue through Lulu. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Custom code in OSG core
Hi Robert, Sukender, The issue of proxy image is something that the osg::Texture's UnrefImageAfterApply could do with as it currently discards the whole osg::Image, so later on when you try to save the model there is no Image to provide the FileName to use to write to file you want to write out. I had also considered making a proxy image class eventually for this exact reason. If you search the archives for proxy image, Sukender, you should find the discussion I and Robert had about this a while ago. An additional benefit would be when doing runtime creation/destruction of contexts. Right now, if you do that, you need to turn off unrefImageAfterApply, or else in the new contexts the textures will be missing. But this completely removes the benefit of unrefImageAfterApply of course, so you have duplicate image data on the CPU memory and GPU memory even if you never (or seldom) create new contexts. So with a proxy image class, you could run a visitor on your models at load time which would replace all images with this proxy image, and then keep unrefImageAfterApply turned on. Then, the image data would only be on the GPU, and at the time when you create a new context, the image would be reloaded by the proxy image, applied to the Texture in the new context, and unreffed again. Since creating new contexts is done seldom, the cost of reloading the image is small and you'd gain the CPU memory back afterwards. Anyways, that's to say that a proxy image was on my to do list (my free time to do list of course, so it will take some time to get to it :-( ) but if you get to it first it could help you and help others at the same time. J-S -- __ Jean-Sebastien Guayjean-sebastien.g...@cm-labs.com 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
Re: [osg-users] question on status of dae (collada) plugin
Jan Ciger wrote: Roger James ro...@beardandsandals.co.uk wrote: Frederic Marmond wrote: Hello world, I'm trying to load some collada files from osg, using osgviewer, recent trunk version on msvc8. I tried on those found on the collada-dom package (collada-dom/dom/test/1.4/data/*.dae ), but only one (cube.dae) is really loading. Some crash (segfault), some display an empty scene, and others don't find any scene at all. Aren't those data files considered as reference ones ? The plugin works ok for me, but make sure that the transparency in your files is correct. It is likely that it was exported wrong (reversed) and the scene is actually displayed, but all transparent. E.g. the default Blender plugin and Google Sketchup export it incorrectly reversed. An easy way to check for this is to use osgconv and convert the dae file into an osg file - if the data are there but you cannot see them, it is the transparency problem. Regards, Jan Jan, The latest version of Sketchup now gets it the right way round. However that now breaks a fix that I put in some time ago. This fix checks for the string "Google Sketchup" in the authoring_tool field at the start of the dae document. So you can defeat it by changing that to something else. I was going to back out this fix in the trunk once the major changes regarding animation etc. have been integrated. Do you know if the Blender export is still broken. Roger ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Custom code in OSG core
Hi Robert, hi all,
Glad to see there's a half-solution. But I must admit I got more questions than
before!
I guess UnrefImageAfterApply won't be called if I don't even display the scene,
so how will writers behave? If they try to read image data, that won't work of
course.
But will they simply write the image filename, and will writeImageFile() simply
do nothing with an Image having no data?
Do you think it would be useful that we (or I) create an osg::ImageProxy
class? Derivated from osg::Image? Or is there something that already does it?
This ImageProxy may be handled by image reader/writers by simply copying or
ignoring the file (if there is no change in the file extension).
And about the texture, should it call something like bool Image::onApplied()
in UnrefImageAfterApply()?
- For Images, it would simply return true, meaning the texture should unref the
image,
- For ProxyImages, it would unload the data and return false, meaning the
texture must not unref.
If you got better ideas, I'm all ears!
Cheers,
Sukender
PVLE - Lightweight cross-platform game engine - http://pvle.sourceforge.net/
- Robert Osfield robert.osfi...@gmail.com a écrit :
Hi Sukender,
So what you are after is a proxy Image class :-)
One possible tweak would be to enable th OSG to carry osg::Image
which
have their FileName field set, but have their data set to null so
they
contain no data. This is the easy part as you can do this right now
-
the next bit is getting the OSG to handle these osg::Image objects
gracefully.
The issue of proxy image is something that the osg::Texture's
UnrefImageAfterApply could do with as it currently discards the whole
osg::Image, so later on when you try to save the model there is no
Image to provide the FileName to use to write to file you want to
write out.
So... this type of feature I can see having multiple uses beyond this
particular plugin and worthy of support into the core OSG.
Robert.
On Wed, Nov 25, 2009 at 10:26 PM, Sukender suky0...@free.fr wrote:
Hi Robert and Paul,
Oh, I'm sorry I shouldn't have written core OSG: it's maybe more
in osg plugins I guess...
I have to load huge models. By huge I mean a few thouthands
triangles but GB of textures. Of course loading such a model simply
leads to a std::bad_alloc. This is why I posted something about lazy
textures/images on the mailing list: I must load the model but I don't
want all the textures to be loaded at the same time. Depending on what
I want to acheive I may need:
1. To leave textures unloaded, but I want writers plugins to do as
if the texture was loaded (= the writer simply says the texture is
abcd.jpg).
2. To load low-res textures (or maybe not loaded at all), but I want
hi-res ones to be switched when needed, especially when writing.
I don't expect solutions to be suited for realtime rendering. I
only need those huge models to be loaded, then processed (= modifiy
geometry without touching the texture or vice-versa, modify only a
part of the scene...) and written to disk for future rendering.
I got a few ideas for these needs:
- Add a noTexture option to readers that stores somewhere the path
of the texture file, and add an option to writers to do as if the
texture was loaded (but only write to the file the path of the image).
This is why I have custom code in reader/writers. But this is clearly
an ugly solution as I need to modify each reader/writer.
- Create a lazy image, which is loaded only when accessing pixel
data. But I don't know if it's easy, and how to do it (as discussed in
the corresponding post).
And a final note: all my code is given to osg-submissions once
stable... I won't violate the OSGPL/LGPL :)
So... any idea? If I can acheive this without modifying OSG source
code, then I'd be very happpy...
Thank you.
Sukender
PVLE - Lightweight cross-platform game engine -
http://pvle.sourceforge.net/
- Robert Osfield robert.osfi...@gmail.com a écrit :
Hi Sukender,
On Wed, Nov 25, 2009 at 2:26 PM, Sukender suky0...@free.fr
wrote:
I'm trying to add custom code in some osg plugins (especially 3DS
and FBX). I often have to write things like:
ADD_DEFINITIONS(-DMY_CUSTOM_CODE) in CMakeLists.txt (or #define
MY_CUSTOM_CODE)
#ifdef MY_CUSTOM_CODE
...
#endif
- Can I submit such code (without the #define of course)?
- Do you think there could be a nicer way to isolate custom
code?
- And finally, do you think this could be a good idea to have a
CMake option such as USER_DEFINES? And then:
FOREACH(CUR_DEFINE ${USER_DEFINES})
ADD_DEFINITIONS(-D${CUR_DEFINE})
ENDFOREACH()
The OSG isn't the place for custom code, both for a licensing
issues,
build issues and maintenance issues. The question really should
be
how to avoid need for custom code in the core OSG. The use of
custom
code embedded in the OSG code would suggest that the OSG doesn't
support
Re: [osg-users] [ANN] The book OpenSceneGraph Design and Implementation is published
Hi J-S, Thank you for the encouragement. Yes, dangdang.com is out of stock temporarily, because of the over 2400 osgChina members waiting for this book. :-D I'd like to help anybody here order this book and post it, or just bring it to the next OSG BOF if possible. Just remind me at the mail list. Wang Rui 2009/11/26 Jean-Sébastien Guay jean-sebastien.g...@cm-labs.com Hi again Wang Rui, I just went to the product page on dangdang.com, and it seems it's out of stock? http://product.dangdang.com/product.aspx?product_id=20732977 http://translate.google.com/translate?js=yprev=_thl=enie=UTF-8u=http%3A%2F%2Fproduct.dangdang.com%2Fproduct.aspx%3Fproduct_id%3D20732977sl=zh-CNtl=en I hope you can help me order a copy of your book :-) J-S -- __ Jean-Sebastien Guayjean-sebastien.g...@cm-labs.com 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 mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] [ANN] The book OpenSceneGraph Design and Implementation is published
Hi Wang Rui, Well the next OSG BOF is in August next year - I'll wait to see if dangdang.com has stock soon and try to order it then. Well, I think I was able to register at dangdang.com and sign up to be notified when there is more stock for your book... Yay for Google Translate :-) It said: 亲爱的Skylark13： 您已成功提交，我们会在到货后尽快通知您！ 本窗口0秒后自动关闭！ We can always poke fun at automatic translations but they get the job done. Looking forward to getting that e-mail. J-S -- __ Jean-Sebastien Guayjean-sebastien.g...@cm-labs.com 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
Re: [osg-users] Custom code in OSG core
Hi J-S, On Thu, Nov 26, 2009 at 2:09 PM, Jean-Sébastien Guay jean-sebastien.g...@cm-labs.com wrote: An additional benefit would be when doing runtime creation/destruction of contexts. Right now, if you do that, you need to turn off unrefImageAfterApply, or else in the new contexts the textures will be missing. But this completely removes the benefit of unrefImageAfterApply of course, so you have duplicate image data on the CPU memory and GPU memory even if you never (or seldom) create new contexts. The issue of the incompatibility of UnrefImageAfterApply with creating a series of graphics contexts can to mind yesterday as I was working on the texture/buffer object pools - what would be useful would be to be able suppress this feature via a osg::State setting, so that even if the scene graphs asks for image to be unref'd the osg::State setting overrides this and prevents it. I have already implemented a similar check for when the texture pools are enabled, as you can't mix UnrefImageAfterApply with texture pools so it's only a small step beyond. Another possibility, albeit more radical, would be to get rid of UnrefImageAfterApply completely and just rely on texture pools completely for managing memory... ;-) This doesn't take away form the usefulness of a proxy image capability. Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Custom code in OSG core
Hi Sukender, I feel that just adding an flag into osg::Image or a callback to do the loading, would be better than requiring a whole new osg::Image subclass. This way osg::ImageStream would also benefit from the capability. The real question is how do to wire it all up? Do we just rely on user code to invoke the loading or do we do it automatically? If we did it automatically do we the load in the thread that requires the concrete osg::Image data or do we have it do in the osgDB::ImagePager a bit like the way that PagedLOD/ProxyNode work? I guess the first step would be to do the load manually. Then take it from there. Robert. On Thu, Nov 26, 2009 at 2:49 PM, Sukender suky0...@free.fr wrote: Hi Robert, hi all, Glad to see there's a half-solution. But I must admit I got more questions than before! I guess UnrefImageAfterApply won't be called if I don't even display the scene, so how will writers behave? If they try to read image data, that won't work of course. But will they simply write the image filename, and will writeImageFile() simply do nothing with an Image having no data? Do you think it would be useful that we (or I) create an osg::ImageProxy class? Derivated from osg::Image? Or is there something that already does it? This ImageProxy may be handled by image reader/writers by simply copying or ignoring the file (if there is no change in the file extension). And about the texture, should it call something like bool Image::onApplied() in UnrefImageAfterApply()? - For Images, it would simply return true, meaning the texture should unref the image, - For ProxyImages, it would unload the data and return false, meaning the texture must not unref. If you got better ideas, I'm all ears! Cheers, Sukender PVLE - Lightweight cross-platform game engine - http://pvle.sourceforge.net/ - Robert Osfield robert.osfi...@gmail.com a écrit : Hi Sukender, So what you are after is a proxy Image class :-) One possible tweak would be to enable th OSG to carry osg::Image which have their FileName field set, but have their data set to null so they contain no data. This is the easy part as you can do this right now - the next bit is getting the OSG to handle these osg::Image objects gracefully. The issue of proxy image is something that the osg::Texture's UnrefImageAfterApply could do with as it currently discards the whole osg::Image, so later on when you try to save the model there is no Image to provide the FileName to use to write to file you want to write out. So... this type of feature I can see having multiple uses beyond this particular plugin and worthy of support into the core OSG. Robert. On Wed, Nov 25, 2009 at 10:26 PM, Sukender suky0...@free.fr wrote: Hi Robert and Paul, Oh, I'm sorry I shouldn't have written core OSG: it's maybe more in osg plugins I guess... I have to load huge models. By huge I mean a few thouthands triangles but GB of textures. Of course loading such a model simply leads to a std::bad_alloc. This is why I posted something about lazy textures/images on the mailing list: I must load the model but I don't want all the textures to be loaded at the same time. Depending on what I want to acheive I may need: 1. To leave textures unloaded, but I want writers plugins to do as if the texture was loaded (= the writer simply says the texture is abcd.jpg). 2. To load low-res textures (or maybe not loaded at all), but I want hi-res ones to be switched when needed, especially when writing. I don't expect solutions to be suited for realtime rendering. I only need those huge models to be loaded, then processed (= modifiy geometry without touching the texture or vice-versa, modify only a part of the scene...) and written to disk for future rendering. I got a few ideas for these needs: - Add a noTexture option to readers that stores somewhere the path of the texture file, and add an option to writers to do as if the texture was loaded (but only write to the file the path of the image). This is why I have custom code in reader/writers. But this is clearly an ugly solution as I need to modify each reader/writer. - Create a lazy image, which is loaded only when accessing pixel data. But I don't know if it's easy, and how to do it (as discussed in the corresponding post). And a final note: all my code is given to osg-submissions once stable... I won't violate the OSGPL/LGPL :) So... any idea? If I can acheive this without modifying OSG source code, then I'd be very happpy... Thank you. Sukender PVLE - Lightweight cross-platform game engine - http://pvle.sourceforge.net/ - Robert Osfield robert.osfi...@gmail.com a écrit : Hi Sukender, On Wed, Nov 25, 2009 at 2:26 PM, Sukender suky0...@free.fr wrote: I'm trying to add custom code in some osg plugins (especially 3DS and FBX). I often have to write things like: ADD_DEFINITIONS(-DMY_CUSTOM_CODE) in
Re: [osg-users] [ANN] The book OpenSceneGraph Design and Implementation is published
Another option here is that Addison-Wesley might be interested in purchasing the English translation rights from Tsinghua University Press. Wang Rui, if there is some way you could email me a PDF of everything up to the end of the 2nd chapter, just as an example, I could pass it on to my editor at A-W and see if they are interested. Then maybe they'd pay us some small honorarium to be technical editors/proofreaders. Paul Martz Skew Matrix Software LLC _http://www.skew-matrix.com_ http://www.skew-matrix.com/ +1 303 859 9466 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] imageio problems and possible solutions on loading some PNG images.
Hi, Tatsuhiro Nishioka schrieb: Another problem is that imageio's libpng doesn't properly handle transparency in PNG file. The problem I have is that the transparency in PNG files are not at all handled and we see a lot of unexpected black or dark portions. I strongly recommend the use of osgdb_png.so (or .dylib) for handling png images instead of imageio. looks like that the current implementation of imageio works with premultiplied alpha, ideally all occurences of kCGImageAlphaPremultipliedFirst should be replaced by kCGImageAlphaFirst, but some test-data could help isolating the problem. cheers, Stephan ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Question about osgManipulator::GridConstraint
Hello, Robert, did you get the file? Thank you! Cheers, Matthias -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=20445#20445 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Custom code in OSG core
Hi Robert, JS and all, Ok. So, I suggest: - Image::get/setProxyLoadCallback (but isn't it the same as subloadcallbacks??) - An option for readers to not load textures but define a callback instead - Calls to if (!data proxy) (*proxy)(); when accessing pixel data - Image::onApplied(), as described in my previous post Does it sounds good to you? Sukender PVLE - Lightweight cross-platform game engine - http://pvle.sourceforge.net/ - Robert Osfield robert.osfi...@gmail.com a écrit : Hi Sukender, I feel that just adding an flag into osg::Image or a callback to do the loading, would be better than requiring a whole new osg::Image subclass. This way osg::ImageStream would also benefit from the capability. The real question is how do to wire it all up? Do we just rely on user code to invoke the loading or do we do it automatically? If we did it automatically do we the load in the thread that requires the concrete osg::Image data or do we have it do in the osgDB::ImagePager a bit like the way that PagedLOD/ProxyNode work? I guess the first step would be to do the load manually. Then take it from there. Robert. On Thu, Nov 26, 2009 at 2:49 PM, Sukender suky0...@free.fr wrote: Hi Robert, hi all, Glad to see there's a half-solution. But I must admit I got more questions than before! I guess UnrefImageAfterApply won't be called if I don't even display the scene, so how will writers behave? If they try to read image data, that won't work of course. But will they simply write the image filename, and will writeImageFile() simply do nothing with an Image having no data? Do you think it would be useful that we (or I) create an osg::ImageProxy class? Derivated from osg::Image? Or is there something that already does it? This ImageProxy may be handled by image reader/writers by simply copying or ignoring the file (if there is no change in the file extension). And about the texture, should it call something like bool Image::onApplied() in UnrefImageAfterApply()? - For Images, it would simply return true, meaning the texture should unref the image, - For ProxyImages, it would unload the data and return false, meaning the texture must not unref. If you got better ideas, I'm all ears! Cheers, Sukender PVLE - Lightweight cross-platform game engine - http://pvle.sourceforge.net/ - Robert Osfield robert.osfi...@gmail.com a écrit : Hi Sukender, So what you are after is a proxy Image class :-) One possible tweak would be to enable th OSG to carry osg::Image which have their FileName field set, but have their data set to null so they contain no data. This is the easy part as you can do this right now - the next bit is getting the OSG to handle these osg::Image objects gracefully. The issue of proxy image is something that the osg::Texture's UnrefImageAfterApply could do with as it currently discards the whole osg::Image, so later on when you try to save the model there is no Image to provide the FileName to use to write to file you want to write out. So... this type of feature I can see having multiple uses beyond this particular plugin and worthy of support into the core OSG. Robert. On Wed, Nov 25, 2009 at 10:26 PM, Sukender suky0...@free.fr wrote: Hi Robert and Paul, Oh, I'm sorry I shouldn't have written core OSG: it's maybe more in osg plugins I guess... I have to load huge models. By huge I mean a few thouthands triangles but GB of textures. Of course loading such a model simply leads to a std::bad_alloc. This is why I posted something about lazy textures/images on the mailing list: I must load the model but I don't want all the textures to be loaded at the same time. Depending on what I want to acheive I may need: 1. To leave textures unloaded, but I want writers plugins to do as if the texture was loaded (= the writer simply says the texture is abcd.jpg). 2. To load low-res textures (or maybe not loaded at all), but I want hi-res ones to be switched when needed, especially when writing. I don't expect solutions to be suited for realtime rendering. I only need those huge models to be loaded, then processed (= modifiy geometry without touching the texture or vice-versa, modify only a part of the scene...) and written to disk for future rendering. I got a few ideas for these needs: - Add a noTexture option to readers that stores somewhere the path of the texture file, and add an option to writers to do as if the texture was loaded (but only write to the file the path of the image). This is why I have custom code in reader/writers. But this is clearly an ugly solution as I need to modify each reader/writer. - Create a lazy image, which is loaded only when accessing pixel data. But I don't know if it's easy, and how to do it (as discussed in the corresponding post). And a final note: all my
Re: [osg-users] VBO's - lifetime.
Hi Robert, Perfect! My application works exits normally again. The glider works as well. Only the tetra file didn't. It crashes after the first viewer. osgcamerad.exe -j 3 d:\tetra.osg: Warning: Could not find plugin to read objects from file 3. GLBufferObjectSet::GLBufferObjectSet _profile._size=5248 Constucting BufferObject 01F1AD18 GLBufferObjectSet::GLBufferObjectSet _profile._size=5184 Constucting BufferObject 01F1AC98 GLBufferObjectSet::deleteAllGLBufferObjects() not implemented yet. GLBufferObjectSet::deleteAllGLBufferObjects() not implemented yet. Texture::TextureObjectManager::deleteAllTextureObjects() _contextID=0 GLBufferObjectSet::discardAllGLBufferObjects() Destucting BufferObject 01F1AD18 GLBufferObjectSet::discardAllGLBufferObjects() Destucting BufferObject 01F1AC98 Texture::TextureObjectManager::discardAllTextureObjects() _contextID=0 _numActiveTextureObjects=0 BufferObject::releaseGLObjects() BufferObject::releaseGLObjects() BufferObject::releaseGLObjects() -- Nico On Thu, Nov 26, 2009 at 1:57 PM, Nico Kruithof nicokruit...@gmail.comwrote: Sure, I'll do that tonight. Thanks a lot for looking into this. -- Nico On Thu, Nov 26, 2009 at 1:36 PM, Robert Osfield robert.osfi...@gmail.comwrote: Hi Nico, I've tracked down issues with both the clean up of the texture object pool and buffer object pool that has required introduction of some new methods for cleanup. I have checked into svn/trunk the initial cut of this code, it enables osgcamera -r 5 tetra.osg to work just fine, as well as a range of other test models. The new code is only provisional though - it outputs lots of debug info the console, and isn't yet tidied up and completed, it is however, far enough along to warrant wider testing. Could you check out OSG svn/trunk and then test this against your app and let me know how you get on. Thanks, 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] imageio problems and possible solutions on loading some PNG images.
Hi Robert and Stephan, I can see the problem using osgviewer. The images I use are available from: http://cvs.flightgear.org/viewvc/data/Textures/Sky/ Here I list some images that show the problems: [Black Edges instead of transparency] broken_n.png: PNG image data, 256 x 256, 8-bit/color RGBA, non-interlaced cirrus_n.png: PNG image data, 256 x 256, 8-bit/color RGBA, non-interlaced cl_cb.png: PNG image data, 512 x 512, 8-bit/color RGBA, non-interlaced cl_cu.png: PNG image data, 1024 x 512, 8-bit/color RGBA, non-interlaced cl_cu2.png: PNG image data, 512 x 256, 8-bit/color RGBA, non-interlaced cl_cumulus.png: PNG image data, 1024 x 1024, 8-bit/color RGBA, non-interlaced cl_ns.png: PNG image data, 1024 x 1024, 8-bit/color RGBA, non-interlaced cl_ns_white.png: PNG image data, 1024 x 1024, 8-bit/color RGBA, non-interlaced cl_stratus.png: PNG image data, 256 x 256, 8-bit/color RGBA, non-interlaced cloud.png: PNG image data, 256 x 256, 8-bit/color RGBA, non-interlaced few_n.png: PNG image data, 256 x 256, 8-bit/color RGBA, non-interlaced inner_halo.png: PNG image data, 64 x 64, 8-bit/color RGBA, non-interlaced moon.png: PNG image data, 256 x 256, 8-bit/color RGBA, non-interlaced outer_halo.png: PNG image data, 256 x 256, 8-bit/color RGBA, non-interlaced scattered_n.png: PNG image data, 256 x 256, 8-bit/color RGBA, non-interlaced sun.png: PNG image data, 128 x 128, 8-bit/color RGBA, non-interlaced [CGBitmapContextCreate got error] broken.png: PNG image data, 256 x 256, 8-bit gray+alpha, non-interlaced cirrus.png: PNG image data, 256 x 256, 8-bit gray+alpha, non-interlaced cl_cumulus2.png: PNG image data, 1024 x 1024, 8-bit gray+alpha, non-interlaced cl_st.png: PNG image data, 256 x 256, 8-bit gray+alpha, non-interlaced few.png: PNG image data, 256 x 256, 8-bit gray+alpha, non-interlaced scattered.png: PNG image data, 256 x 256, 8-bit gray+alpha, non-interlaced Stephan, I tried kCGImageAlphaFirst as you said, but it only showed the following errors on loading RGBA images (e.g. cl_cumulus.png): Error: CGBitmapContextCreate: unsupported parameter combination: 8 integer bits/component; 32 bits/pixel; 3-component colorspace; kCGImageAlphaFirst; 4096 bytes/row. Error: CGContextDrawImage: invalid context Could you make some tests with these images on your end too? Best, Tat On Nov 26, 2009, at 11:07 PM, Robert Osfield wrote: HI Tat, I don't have a OSX system to test against personally, but for those who do have OSX and wish to help investigate this bug with the imageio plugin it would be worth putting together a small set of test images that you see problems so that they can reproduce the problem themselves. Also if we can settle upon an existing OSG example or a small mod to one that can help illustrate the issue then this would also help. For instance do you see the problem if you do something as simple as: osgviewer --image myimage.png Cheers, Robert. On Thu, Nov 26, 2009 at 1:12 PM, Tatsuhiro Nishioka tat.fgmac...@gmail.com wrote: Hi there, I have two problems in drawing PNG image using imageio on Mac OS X. One problem is that 16-bit grayscale textures (PNG images) cannot be loaded due to the following errors: Error: CGBitmapContextCreate: unsupported parameter combination: 8 integer bits/component; 16 bits/pixel; 1-component colorspace; kCGImageAlphaLast; 512 bytes/row. Error: CGContextDrawImage: invalid context The cause of this is that CGBitmapContextCreate doesn't accept the combination of 1 component colorspace and 16bps. One solution I can think of at this moment is to create a bitmap context using RGBA colorspace (as the same as the 32bit RGBA image). This works fine on FlightGear but I'm not so sure if this works on all 16bpp images. Another problem is that imageio's libpng doesn't properly handle transparency in PNG file. The problem I have is that the transparency in PNG files are not at all handled and we see a lot of unexpected black or dark portions. I strongly recommend the use of osgdb_png.so (or .dylib) for handling png images instead of imageio. More detail explanation, screenshots, and an experimental patch for solving these two problems are available from: http://macflightgear.sourceforge.net/home/development-notes/devnote-nov-26-2009 Please try my patch and see if it also works on many OSG applications. FYI, I'm using OSG/svn as of a few day back on Mac OS 10.5.8 / intel. Best, Tat ___ 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
Re: [osg-users] VBO's - lifetime.
HI Nico, On Thu, Nov 26, 2009 at 5:16 PM, Nico Kruithof nicokruit...@gmail.com wrote: Hi Robert, Perfect! My application works exits normally again. The glider works as well. Only the tetra file didn't. It crashes after the first viewer. So you still have a crash with tetra.osg then? FYI, I've made a couple of other fixes this afternoon, but the code isn't ready to integrate yet. I can't say whether it will fix anything more for you as the tetra.osg model has been working fine since my fixes I checked in this morning and notified you about. osgcamerad.exe -j 3 d:\tetra.osg: Warning: Could not find plugin to read objects from file 3. The -j option is not valid, trying using -r for repeat ;-) Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Slave camera configuration by config file
Paul Martz wrote: OSG_CAMERA_FILE=Configuration/AllScreens.view osgviewer cow.osg ^^ Oops, that's OSG_CONFIG_FILE, of course. -Paul ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Slave camera configuration by config file
Hi Paul, I have a system with four displays arranged as a 2x2 powerwall. If I simply bring up osgviewer cow.osg, osgViewer seems to think that the four displays are arranged horizontally. That seems like a fine default assumption. Yes, I've seen this too. On Windows (and I expect on Linux and OSX too) there's an API call you can make to get the actual offset of a screen, so you can detect how the screens are physically arranged (as long as the system's display properties are set correctly of course). We use this in our software to set up layouts like the one you want, and I was thinking of submitting a modification to osgViewer (probably GraphicsWindowWin32) to take this into account. But yeah, if you can find a way to make a config file that will do it as you want, that will be a good solution. And simpler than autodetecting correctly :-) J-S -- __ Jean-Sebastien Guayjean-sebastien.g...@cm-labs.com 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] [3rdparty] How to configure VPB to start compiling database at random tiles.
Hi, I compile a large Database (800GB terraindata) to a single database. so far it is compiling, but besides 2 processes, all other osgdem instances are more or less at idle, waiting for disk. My source data is spreaded above 4 Disks to lower the disk load an consist of the following directories with their content files: -North -South -East -West -HiRes-Inlay -DEM unfortunately VPB starts to render in the south section and assign worktasks from south to all cores - therefore my disk containtin south is under heavy load, and all other disks are at idle. Is it possible to configure VPB to start at random tiles, so some tasks are working on north data, some other at HiRes and so on? This way ALL disks would be under load and no osgdem instance would have to idle :) Thank you for your help. Torben Thank you! Cheers, Torben -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=20456#20456 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] broken osgconv.exe
Hi Ted, J-S, all, First - all creds and kudos for the vc90 binary win32 2.8.2 packages to Sukender, not me. Second - did you (Ted) sort this out? Can we drop it or do you still have problems? Mattias On Wed, Nov 25, 2009 at 1:03 PM, Mattias Helsing helsin...@gmail.com wrote: Hi again Ted, I can't find any dll that depends on msvc*80 runtime dll but may have some clues to a solution. On Tue, Nov 24, 2009 at 9:03 PM, ted morris ted.mor...@gmail.com wrote: Yes, I think I resolved finding the 3rdparty dependencies. But for some reason, the osgdb_xxx pluggins listed in the last e-mail: osgdb_gz osgdb_curl osgdb_ive osgdb_png osgdb_tiff osgdb_tiffd These all depend on zlib1.dll, which on my system depend correctly on msvcp90.dll. I'm guessing that somehow your system picks up some other zlib1. The zlib module is very common so there is a good chance you already got it embedded with other software. Try setting the PATH explicitly like: set PATH=vc90_dependencis\bin;vc90_osg\bin before running dependency walker or osgviewer dependencywalker shows that these pluggin dlls are still looking for MSVCR80.DLL *and* MSVCR90.DLL No, osgdb_tiff, _curl and the other plugin in your list depends on msvcr90.dll. However they also depend on many other modules that may, in turn, depend on whatever runtime they were compiled against. Hitting f9 in dependency walker will show you the full path to all listed dlls And the other pluggins can't find MSVCR90.DLL. I think this is a flaw in dependency walker. I don't have your system, but my system reports this too where top dependency msvcp90 depends on msvcr90. If this is the case also for you then just ignore. I'm dropping this for now since I can't find anything wrong with the binaries on the website. Drop me screenshots, text logs or whatever and I'll investigate further. cheers Mattias bizarre. thanks, t Well, I tried dependencywalker.com and opened up the pluggins. On Mon, Nov 23, 2009 at 7:24 PM, Mourad Boufarguine mourad.boufargu...@gmail.com wrote: Hi Ted, You can use the Dependency Walker (http://www.dependencywalker.com/) to check the version number of the runtime, the dependencies were compiled against. I just tried it with the zlib and png dlls contained in VisualStudio 9 (2008) SP1 prebuild dependencies (http://www.openscenegraph.org/projects/osg/wiki/Downloads/Dependencies), and I found that the release versions were compiled with the 9.0.30729 runtime, which is actually 2008 SP1. The debug version, though, was compiled with the 9.0.21022 runtime , which is the 2008 runtime. The zlib is used in both ive and gz plugins. I don't see how you get the message about the 2005 runtime dependency. Double check in the output window of VS that the zlib and png dlls that are actually loaded are the good ones. Regards, Mourad On Tue, Nov 24, 2009 at 1:21 AM, ted morris ted.mor...@gmail.com wrote: credist_x86 VisualStudio 2005 (v8) runtimes ___ 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] normal vectors aren't causing culling
This is very basic
This test-code snippet is supposed to create a simple square with a
normal vector (or vectors).
After rotating it around with the trackball manipulator, the square is
never culled.
Same behavior on OSG 2.6 and 2.8.
Also, having trouble with with a dome composed of squares constructed similarly.
No matter how the normal vectors are assigned, every square is culled
when the viewpoint is inside the dome (the opposite is needed).
Is OSG computing normal vectors after the app sets them?
void
MakeModelSquare( void )
{
osg::ref_ptrosg::Geometry geom = new osg::Geometry;
// Vertexs.
osg::ref_ptrosg::Vec3Array vertexs = new osg::Vec3Array;
const fp x = 10.0f;
const fp y = -50.0f; // Z (viewplane depth)
const fp z = 10.0f;
vertexs-push_back( osg::Vec3f( x, y, z ) );
vertexs-push_back( osg::Vec3f( -x, y, z ) );
vertexs-push_back( osg::Vec3f( -x, y, -z ) );
vertexs-push_back( osg::Vec3f( x, y, -z ) );
geom-setVertexArray( vertexs.get() );
// Colors.
osg::ref_ptrosg::Vec4Array colors = new osg::Vec4Array;
colors-push_back( osg::Vec4f( 1.0f, 1.0f, 0.0f, 1.0f ) );
geom-setColorArray( colors.get() );
geom-setColorBinding( osg::Geometry::BIND_OVERALL );
// Normal vectors.
const osg::Vec3f crossProduct = ((*vertexs)[0]) ^ ((*vertexs)[1]);
osg::ref_ptrosg::Vec3Array normals = new osg::Vec3Array;
#if 0
normals-push_back( crossProduct );
geom-setNormalArray( normals.get() );
geom-setNormalBinding( osg::Geometry::BIND_OVERALL );
#else
normals-push_back( crossProduct );
normals-push_back( crossProduct );
normals-push_back( crossProduct );
normals-push_back( crossProduct );
geom-setNormalArray( normals.get() );
geom-setNormalBinding( osg::Geometry::BIND_PER_VERTEX );
#endif
// Compose geode.
osg::ref_ptrosg::Geode geode = new osg::Geode;
geom-addPrimitiveSet( new osg::DrawArrays( GL_QUADS, 0, 4 ) );
geode-addDrawable( geom.get() );
// Attach to scene-graph.
mRootGroup-addChild( geode.get() );
}
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Re: [osg-users] normal vectors aren't causing culling
2009/11/26 Jim Brooks jimbl...@gmail.com This is very basic This test-code snippet is supposed to create a simple square with a normal vector (or vectors). After rotating it around with the trackball manipulator, the square is never culled. Same behavior on OSG 2.6 and 2.8. Culling is not enabled by default, you have to explicitly enable it. With OpenGL, normal vectors have nothing to do with culling, they are only used for lighting purposes; culling is determined by the primitive vertices and the sign of the area they give after projection to screen(ish) coordinates. Also, having trouble with with a dome composed of squares constructed similarly. No matter how the normal vectors are assigned, every square is culled when the viewpoint is inside the dome (the opposite is needed). Is OSG computing normal vectors after the app sets them? No, OSG never computes normals for you. For your dome you either need to swap the vertex order, or change the culling mode: http://www.opengl.org/sdk/docs/man/xhtml/glCullFace.xml Can't recall the OSG equivalent at the mo, you'll have to look it up. // Normal vectors. const osg::Vec3f crossProduct = ((*vertexs)[0]) ^ ((*vertexs)[1]); This is wrong. You are doing the crossproduct of 2 vertices, not 2 vectors. You want: osg::Vec3Array vx = *vertexs.get(); osg::Vec3fcrossProduct = (vx[2] - vx[1]) ^ (vx[1] - vx[0]); The rest looks OK though. Btw, the plural of vertex is vertices, not vertexs. -- http://www.ssTk.co.uk ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] [osgOcean] Wake effects?
Hi Kim: Thank you! By now, I am using the olde version. And I will try more. Regards, Tian Kim Bale wrote: Hi Tian, It did highlight some useful stuff. Unfortunately I won't get round to fixing this immediately. However, if you want to use the version in the trunk you can probably get round it by replacing the uniform booleans one by one with hard coded values in the water shader for the options you want to enable until it stop complaining. Obviously this is a temporary fix until I get round to investigating further. K. 2009/11/26 Tian Ma : Hi Kim: Thanks for your helpful work! Does the information inf file ocean_output.txt help? Regards, Tian Kim Bale wrote: Hi Peter, Well this is really what the many weird and wonderful configurable options are for in OceanScene, nearly every effect can be turned off an on to suit the graphics card configuration. I think it's probably better to do it this way, rather than grouping them together to give the low,medium and high settings, as you can fine tune the rendering to suit the available hardware. The core water shader itself isn't so expensive, it's largely the pre render passes that bring down the frame rate and all of these can be turned off and on as desired. (I think) the problem with Tians card at the moment is that the water shader in the trunk has used up all the maximum number of uniforms permitted on nvidia 7 series card which use a version of glsl that I'm not 100% sure of. But I think this can be worked around, I just haven't got round to it yet (plus it's quite hard to test without a suitable card) K. 2009/11/26 Peter Bear : Would it be possible to implement sort of a config option with 2 or more shaders for multiple quality levels? This would allow for the use of one shader if you have a more powerful card, or another shader for an older card. Peter -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=20395#20395 ___ osg-users mailing list http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org -- Post generated by Mail2Forum -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=20410#20410 ___ osg-users mailing list http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org -- Post generated by Mail2Forum -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=20461#20461 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] [build] How to properly use the OSG_GL3_AVAILABLE CMake option?
Hi Robert,
My understanding of the way bindness graphics actually achieves its speedup is
by not requiring CPU dereferencing of graphic object pointers and the likely L2
cache misses this causes.
nVidia states:
OpenGL has evolved in a way that allows applications to replace many of the
original state machine variables with blocks of user-defined data. For example,
the current vertex state has been augmented by vertex buffer objects,
fixed-function shading state and parameters have been replaced by
shaders/programs and constant buffers, etc.. Applications switch between coarse
sets of state by binding objects to the context or to other container objects
(e.g. vertex array objects) instead of manipulating state variables of the
context. In terms of the number of GL commands required to draw an object, this
enables applications to be an order of magnitude more efficient. However, this
explosion of objects bound to other objects has led to a new bottleneck -
pointer chasing and CPU L2 cache misses in the driver, and general L2 cache
pollution.
Recent OpenGL graphics applications tend to change state at roughly these
frequencies:
for (...) { // cold
data downloads, render target changes, etc.
for (...) { // warm
bind textures
for (...) { // hot
bind constants
bind vertex buffers
Draw();
}
}
}
The most frequent state changes are binding vertex buffer objects (every draw),
followed closely by binding constant buffers. Vertex buffer and constant buffer
binds are significantly more expensive than one might expect. These binds
require several reads from the driver internal object data structure to
accomplish what the driver actually needs to do. In an OpenGL driver, it looks
like this:
name-obj (lookup object by name)
obj-{refcount, GPU address, state, etc.} (dereference object to reference
count it, to get its GPU virtual address, and validate its state).
Each of these dereferences has a high probability of causing a CPU L2 cache
miss due to the inherently LRU-eviction-unfriendly nature of graphics
applications (each frame starts over at the beginning). These L2 cache misses
are a huge bottleneck in modern drivers, and a penalty paid for every frame
rendered.
End nVidia states.
I think these extensions address new bottlenecks created by the switch to gl3
style vertex and constant buffers, shaders for everything, etc. It seems to be
a graphic driver bottleneck, not a scenegraph problem. But what nVidia is doing
is admitting the problem and is trying to provide OpenGL users a way to take
advantage of an optimization technique.
The OpenGL extensions are GL_NV_shader_buffer_load and
GL_NV_vertex_buffer_unified_memory.
I am not competent enough with gl3 yet to begin to implement these in code, but
it seems it may be worth doing that at some point. I like to add quality in
things I pursue. As I progress, I will keep in touch. For now I am a toddler.
Thank you!
Cheers,
John
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[osg-users] [build] problem building OSGOCean in fedora 11
Hi, When i try to make OSG Ocean in my fedora 11, i get the following errors [r...@coral osgOcean]# cmake . -- Using FFTSS (LGPL) as FFT library. CMake Error: The following variables are used in this project, but they are set to NOTFOUND. Please set them or make sure they are set and tested correctly in the CMake files: OPENTHREADS_LIBRARY_DEBUG linked by target osgOcean in directory /usr/src/OSG/osgOcean/src/osgOcean -- Configuring incomplete, errors occurred! can any one tell me how should i correct this. i have already installed FFTSS and open thread in my system. i checked, it exist in my /usr/local/ directory. Thank you! Cheers, Aburik -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=20463#20463 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] VBO's - lifetime.
Aargh. Yes, -r it was. I'll try this tonight or tomorrow. Nico On Thu, Nov 26, 2009 at 7:12 PM, Robert Osfield robert.osfi...@gmail.comwrote: HI Nico, On Thu, Nov 26, 2009 at 5:16 PM, Nico Kruithof nicokruit...@gmail.com wrote: Hi Robert, Perfect! My application works exits normally again. The glider works as well. Only the tetra file didn't. It crashes after the first viewer. So you still have a crash with tetra.osg then? FYI, I've made a couple of other fixes this afternoon, but the code isn't ready to integrate yet. I can't say whether it will fix anything more for you as the tetra.osg model has been working fine since my fixes I checked in this morning and notified you about. osgcamerad.exe -j 3 d:\tetra.osg: Warning: Could not find plugin to read objects from file 3. The -j option is not valid, trying using -r for repeat ;-) 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] [vpb] lots of failed tasks: Resuming vpbmaster run
Hi, Now an update to my compiling Problem: I have new hardware ( Nehalem architecture ) I installed a fresh system: 64 Bit Kubuntu 9.10 Karmic Koala with OSG 2.8.2 and the corresponding VPB. In constrast to my last setup, local rendering with all source data does not fail. Last night I canceled the compiling after the first 1000 tasks, nothing failed. @ my last (32bit) setup, even this was not possible. It seems that 64 bit solves the handle problem, which caused my old setup to crash in arbitrary libraries. I'll report if my compiling was successful finished. A detailed howto will be posted at openscenegraph. Thank you for your help, Torben -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=20465#20465 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
