Re: [osg-users] Improving performance of OBJ rendering by back face culling
So... your suggestion is to optimize the 3d model reducing the number of vertices because face culling will not improve performance? Can you argue more about why is like that? Thank you. John On May 29, 2012, at 11:26 PM, Paul Martz wrote: > Enabling face culling will improve performance only when rendering is > fill-limited. If you're vertex-limited, face culling will not affect > performance. > -Paul > > > > On 5/29/2012 2:48 PM, Gio wrote: >> Hello, >> I am developing an application for iphone and ipod touch using >> openscenegraph. It is an augmented reality application and I have to load a >> very complex model. The original 3d model has 5 million vertices. >> Since I am using a mobile platform which is limited in computational power I >> simplified the model using 3d studio max. I reduced the size of the model >> from 500Mb to 4.2 Mb using proOptimizer. >> The model now has in total about 36,000 vertices and about 53,000 faces. >> >> I am able to render it but frame rate is slow. I'd like to improve >> performance using back face culling. The point is I don't know how to >> activate it (if it is possible): >> I tried with these lines of code but frame rate is still low: >> >> [code] >> osg::StateSet* ss = _root->getOrCreateStateSet(); >> osg::CullFace* cf = new osg::CullFace(osg::CullFace::BACK ); >> ss->setAttribute( cf ); >> [/code] >> >> I am using OpenGL ES 2.0 and shaders. >> >> I setup the camera in this way: >> >> [code] >> //set the clear color of the camera to be transparent >> _viewer->getCamera()->setClearColor(osg::Vec4(0.0f, 0.0f, 0.0f, 0.0f)); >> //set the clear mask for the camera >> _viewer->getCamera()->setClearMask(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT); >> _viewer->getCamera()->setRenderOrder(osg::CameraNode::PRE_RENDER); >> _viewer->getCamera()->setComputeNearFarMode(osgUtil::CullVisitor::DO_NOT_COMPUTE_NEAR_FAR); >> [/code] >> >> I use DO_NOT_COMPUTE_NEAR_FAR because I need to set manually projection and >> viewMatrix at every drawing cycle. >> >> I also initially set viewport like this: >> >> [code] >> _viewer->getCamera()->setViewport(new osg::Viewport(0, 0, >> graphicsContext->getTraits()->width, graphicsContext->getTraits()->height)); >> [/code] >> >> The hierarchy of my object is structured as: >> >> _root is a osg::MatrixTransform >> >> my 3d model is divided in subparts. >> all the subparts of my 3d model are direct child of _root and are of type >> osg::Node >> >> I hope you can give me some tips to improve performance. If you need some >> other information about my setup I will be glad to give it. >> >> Thank you. >> >> Greetings, >> John Moore >> ___ >> 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] Building a slimmed down static version of OSG
Thanks for the reply.
After messing with the CMakeLists in OpenThreads (forced pthreads), I
got it to compile and build me a static lib archive... unfortutely I
have pretty much the same problem, about a bajillion of these errors
originating from various osg sources.
Program.cpp:(.text+0x5158): undefined reference to
`OpenThreads::Mutex::Mutex(OpenThreads::Mutex::MutexType)'
Program.cpp:(.text+0x5160): undefined reference to
`OpenThreads::Mutex::~Mutex()'
On Tue, May 29, 2012 at 5:02 PM, Thomas Hogarth
wrote:
> Hi Preet
>
> Good to hear you're working on a Blackberry port.
>
> In regard to the libs you need your main aim is to get osgViewer compiling.
> If that compiles then you can setup a viewer a render your scenegraph.
>
> You'll have two options for this, you can either create your own
> implementation of osgViewer::GraphicsWindow to handle setting up an OpenGL
> context, window etc. Or you can just use the OpenGL example you have and
> setup the viewer using the setupViewerAsEmbeded function which will allow you
> to draw the osg scenegraph into your example OpenGL view.
>
> Probably easiest to try setupViewerAsEmbeded first to test osg itself is
> working, then you can try and create your own viewer.
>
> With regard to OpenThreads it's probably related to the actual operating
> system you are using to build the libs. For example if you are on windows
> then CMake is probably selecting the windows threading stuff because it's not
> aware your trying to build for blackberry.
>
> If you take a look at src/OpenThreads/CMakeLists.txt near the bottom you'll
> find this
>
>
> Code:
> IF(NOT ANDROID)
> # Use our modified version of FindThreads.cmake which has Sproc hacks.
> FIND_PACKAGE(Threads)
> ENDIF()
> # Do we have sproc?
> IF(CMAKE_SYSTEM MATCHES IRIX)
> IF(CMAKE_USE_SPROC_INIT)
> # In this case, only Sproc exists, so no option.
> SET(OPENTHREADS_USE_SPROC_INSTEAD_OF_PTHREADS 1)
> ELSE()
> IF(CMAKE_HAVE_SPROC_H)
> OPTION(OPENTHREADS_USE_SPROC_INSTEAD_OF_PTHREADS "Set to ON to
> build OpenThreads against sproc instead of pthreads" OFF)
> ENDIF()
> ENDIF()
> ENDIF(CMAKE_SYSTEM MATCHES IRIX)
>
> # Add support for using Qt threads
> IF(QT4_FOUND)
> OPTION(BUILD_OPENTHREADS_WITH_QT "Build OpenThreads with Qt threading
> support." OFF)
> ENDIF()
>
> # Maybe we should be using the FindThreads.cmake module?
> IF(ANDROID)
> SUBDIRS(pthreads)
> ELSEIF(QT4_FOUND AND BUILD_OPENTHREADS_WITH_QT)
> SUBDIRS(qt)
> ELSEIF(WIN32)
> # So I think Cygwin wants to use pthreads
> IF(CYGWIN)
> SUBDIRS(pthreads)
> ELSE()
> # Everybody else including Msys should probably go here
> SUBDIRS(win32)
> # examples)
> ENDIF()
> ELSE()
> IF(UNIX)
> IF(OPENTHREADS_USE_SPROC_INSTEAD_OF_PTHREADS)
> SUBDIRS(sproc)
> ELSE()
> SUBDIRS(pthreads)
> ENDIF()
> ELSE()
> MESSAGE("Sorry, OpenThreads may not support your platform")
> ENDIF()
> ENDIF()
>
>
>
>
> In there it is selecting the correct threading module for the platform. For
> a temporary fix you can just force the use of pthreads.
>
> Regarding plugins, cmake will only generate build targets for pulgins for
> which it has found the dependancies. Be careful though that it doesn't find
> your operating system versions. For good asset support you'll need at least
> libpng for loading of png images, and freetypes for fonts.
>
> The osg format plugins themselves have no external dependancies so should
> build as long as osg does.
>
> Cheers
> Tom
>
> --
> Read this topic online here:
> http://forum.openscenegraph.org/viewtopic.php?p=47924#47924
>
>
>
>
>
> ___
> 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] Improving performance of OBJ rendering by back face culling
Enabling face culling will improve performance only when rendering is fill-limited. If you're vertex-limited, face culling will not affect performance. -Paul On 5/29/2012 2:48 PM, Gio wrote: Hello, I am developing an application for iphone and ipod touch using openscenegraph. It is an augmented reality application and I have to load a very complex model. The original 3d model has 5 million vertices. Since I am using a mobile platform which is limited in computational power I simplified the model using 3d studio max. I reduced the size of the model from 500Mb to 4.2 Mb using proOptimizer. The model now has in total about 36,000 vertices and about 53,000 faces. I am able to render it but frame rate is slow. I'd like to improve performance using back face culling. The point is I don't know how to activate it (if it is possible): I tried with these lines of code but frame rate is still low: [code] osg::StateSet* ss = _root->getOrCreateStateSet(); osg::CullFace* cf = new osg::CullFace(osg::CullFace::BACK ); ss->setAttribute( cf ); [/code] I am using OpenGL ES 2.0 and shaders. I setup the camera in this way: [code] //set the clear color of the camera to be transparent _viewer->getCamera()->setClearColor(osg::Vec4(0.0f, 0.0f, 0.0f, 0.0f)); //set the clear mask for the camera _viewer->getCamera()->setClearMask(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT); _viewer->getCamera()->setRenderOrder(osg::CameraNode::PRE_RENDER); _viewer->getCamera()->setComputeNearFarMode(osgUtil::CullVisitor::DO_NOT_COMPUTE_NEAR_FAR); [/code] I use DO_NOT_COMPUTE_NEAR_FAR because I need to set manually projection and viewMatrix at every drawing cycle. I also initially set viewport like this: [code] _viewer->getCamera()->setViewport(new osg::Viewport(0, 0, graphicsContext->getTraits()->width, graphicsContext->getTraits()->height)); [/code] The hierarchy of my object is structured as: _root is a osg::MatrixTransform my 3d model is divided in subparts. all the subparts of my 3d model are direct child of _root and are of type osg::Node I hope you can give me some tips to improve performance. If you need some other information about my setup I will be glad to give it. Thank you. Greetings, John Moore ___ 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] Building a slimmed down static version of OSG
Hi Preet
Good to hear you're working on a Blackberry port.
In regard to the libs you need your main aim is to get osgViewer compiling.
If that compiles then you can setup a viewer a render your scenegraph.
You'll have two options for this, you can either create your own implementation
of osgViewer::GraphicsWindow to handle setting up an OpenGL context, window
etc. Or you can just use the OpenGL example you have and setup the viewer using
the setupViewerAsEmbeded function which will allow you to draw the osg
scenegraph into your example OpenGL view.
Probably easiest to try setupViewerAsEmbeded first to test osg itself is
working, then you can try and create your own viewer.
With regard to OpenThreads it's probably related to the actual operating system
you are using to build the libs. For example if you are on windows then CMake
is probably selecting the windows threading stuff because it's not aware your
trying to build for blackberry.
If you take a look at src/OpenThreads/CMakeLists.txt near the bottom you'll
find this
Code:
IF(NOT ANDROID)
# Use our modified version of FindThreads.cmake which has Sproc hacks.
FIND_PACKAGE(Threads)
ENDIF()
# Do we have sproc?
IF(CMAKE_SYSTEM MATCHES IRIX)
IF(CMAKE_USE_SPROC_INIT)
# In this case, only Sproc exists, so no option.
SET(OPENTHREADS_USE_SPROC_INSTEAD_OF_PTHREADS 1)
ELSE()
IF(CMAKE_HAVE_SPROC_H)
OPTION(OPENTHREADS_USE_SPROC_INSTEAD_OF_PTHREADS "Set to ON to
build OpenThreads against sproc instead of pthreads" OFF)
ENDIF()
ENDIF()
ENDIF(CMAKE_SYSTEM MATCHES IRIX)
# Add support for using Qt threads
IF(QT4_FOUND)
OPTION(BUILD_OPENTHREADS_WITH_QT "Build OpenThreads with Qt threading
support." OFF)
ENDIF()
# Maybe we should be using the FindThreads.cmake module?
IF(ANDROID)
SUBDIRS(pthreads)
ELSEIF(QT4_FOUND AND BUILD_OPENTHREADS_WITH_QT)
SUBDIRS(qt)
ELSEIF(WIN32)
# So I think Cygwin wants to use pthreads
IF(CYGWIN)
SUBDIRS(pthreads)
ELSE()
# Everybody else including Msys should probably go here
SUBDIRS(win32)
# examples)
ENDIF()
ELSE()
IF(UNIX)
IF(OPENTHREADS_USE_SPROC_INSTEAD_OF_PTHREADS)
SUBDIRS(sproc)
ELSE()
SUBDIRS(pthreads)
ENDIF()
ELSE()
MESSAGE("Sorry, OpenThreads may not support your platform")
ENDIF()
ENDIF()
In there it is selecting the correct threading module for the platform. For a
temporary fix you can just force the use of pthreads.
Regarding plugins, cmake will only generate build targets for pulgins for which
it has found the dependancies. Be careful though that it doesn't find your
operating system versions. For good asset support you'll need at least
libpng for loading of png images, and freetypes for fonts.
The osg format plugins themselves have no external dependancies so should build
as long as osg does.
Cheers
Tom
--
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=47924#47924
___
osg-users mailing list
osg-users@lists.openscenegraph.org
http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] Improving performance of OBJ rendering by back face culling
Hello, I am developing an application for iphone and ipod touch using openscenegraph. It is an augmented reality application and I have to load a very complex model. The original 3d model has 5 million vertices. Since I am using a mobile platform which is limited in computational power I simplified the model using 3d studio max. I reduced the size of the model from 500Mb to 4.2 Mb using proOptimizer. The model now has in total about 36,000 vertices and about 53,000 faces. I am able to render it but frame rate is slow. I'd like to improve performance using back face culling. The point is I don't know how to activate it (if it is possible): I tried with these lines of code but frame rate is still low: [code] osg::StateSet* ss = _root->getOrCreateStateSet(); osg::CullFace* cf = new osg::CullFace(osg::CullFace::BACK ); ss->setAttribute( cf ); [/code] I am using OpenGL ES 2.0 and shaders. I setup the camera in this way: [code] //set the clear color of the camera to be transparent _viewer->getCamera()->setClearColor(osg::Vec4(0.0f, 0.0f, 0.0f, 0.0f)); //set the clear mask for the camera _viewer->getCamera()->setClearMask(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT); _viewer->getCamera()->setRenderOrder(osg::CameraNode::PRE_RENDER); _viewer->getCamera()->setComputeNearFarMode(osgUtil::CullVisitor::DO_NOT_COMPUTE_NEAR_FAR); [/code] I use DO_NOT_COMPUTE_NEAR_FAR because I need to set manually projection and viewMatrix at every drawing cycle. I also initially set viewport like this: [code] _viewer->getCamera()->setViewport(new osg::Viewport(0, 0, graphicsContext->getTraits()->width, graphicsContext->getTraits()->height)); [/code] The hierarchy of my object is structured as: _root is a osg::MatrixTransform my 3d model is divided in subparts. all the subparts of my 3d model are direct child of _root and are of type osg::Node I hope you can give me some tips to improve performance. If you need some other information about my setup I will be glad to give it. Thank you. Greetings, John Moore ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Building a slimmed down static version of OSG
Quick follow up, After playing around with the CMake gui for awhile, I managed to get it to compile a set of static libs. Unfortunately it seems that OpenThreads is missing from the built libs, and trying to compile a project that links with osg results in a bunch of errors regarding missing OpenThreads symbols. The Playbook runs QNX, which has pthreads. The CMake Configure still seems to fail the OpenThreads tests (is there anything I can point CMakeLists to so it'll pass the tests?). I'd appreciate any advice. Regards, Preet On Mon, May 28, 2012 at 6:00 PM, Preet wrote: > Hi, > > I'm trying to build OSG for another platform (the BlackBerry > Playbook). The NDK for the Playbook includes the tool chains required > to compile libs/apps for the device. It also has OpenGL ES 1.1/2.0 > libs, EGL, freetype, etc. I feel like it should be possible to compile > OSG for the Playbook but I'm a little lost dealing with the included > CMakeLists. > > I tried looking at this for reference: > http://www.openscenegraph.com/index.php/documentation/platform-specifics/ios/23-configuring-cmake-for-ios, > but I don't understand how to enable/disable certain plugins for OSG > when configuring with CMake or how to know what's really required in a > minimal build. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] TransformFeedbackBufferBinding
Hello, there are anyone who has experience with the osg::TransformFeedbackBufferBinding class? How can I use it? Have someone a little example? Thanks Martin -- NEU: FreePhone 3-fach-Flat mit kostenlosem Smartphone! Jetzt informieren: http://mobile.1und1.de/?ac=OM.PW.PW003K20328T7073a ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Advice on scene structuring
Hi, Pau GL_ARB_draw_instanced extension. Osg support instanced drawing, osg:PrimitiveSet allows to set number of instances for drawing. You'll need to write shader which will transform vertices according to gl_InstanceID (most basic way is to use uniform array with transform matrices for each instance, and index it with gl_InstanceID). 29.05.2012, 14:40, "Pau Estalella" : > Hi, > > Can anyone point me to some example or provide some advice on how to > structure a > scene with a low poly object replicated thousands of times, at different > orientations and positions? Each instance can be in one of the several states > that the object can be, using an osg::Switch. The state of each instance > changes > independently of the others. > I think osg::PositionAttitudeTransform for each instance is not an option, as > it > kills culling performance. Replicating the geometry and transforming the > vertices seems a little bit wrong, and a total memory waste. > Any ideas? > > Thank you very much. > > Cheers, > Pau > > -- > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=47912#47912 > > ___ > 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] Advice on scene structuring
Hi Pau, Maybe you can make use of Geometry Instancing, take a look at osgdrawinstanced example. I've make use of instanced rendering to draw a large amount of cubes and spheres. Hope it helps. 2012/5/29 Pau Estalella > Hi, > > Can anyone point me to some example or provide some advice on how to > structure a > scene with a low poly object replicated thousands of times, at different > orientations and positions? Each instance can be in one of the several > states > that the object can be, using an osg::Switch. The state of each instance > changes > independently of the others. > I think osg::PositionAttitudeTransform for each instance is not an option, > as it > kills culling performance. Replicating the geometry and transforming the > vertices seems a little bit wrong, and a total memory waste. > Any ideas? > > Thank you very much. > > Cheers, > Pau > > -- > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=47912#47912 > > > > > > ___ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > -- Jordi Torres Fabra gvSIG 3D blog http://gvsig3d.blogspot.com Instituto de Automática e Informática Industrial http://www.ai2.upv.es ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] Advice on scene structuring
Hi, Can anyone point me to some example or provide some advice on how to structure a scene with a low poly object replicated thousands of times, at different orientations and positions? Each instance can be in one of the several states that the object can be, using an osg::Switch. The state of each instance changes independently of the others. I think osg::PositionAttitudeTransform for each instance is not an option, as it kills culling performance. Replicating the geometry and transforming the vertices seems a little bit wrong, and a total memory waste. Any ideas? Thank you very much. Cheers, Pau -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=47912#47912 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] [osgPlugins] FBX plugin: mixing skin and morph animation.
Hi, Gil skinning + morph animation dont work out of the box with fbx files, ways to make it work was repeatedly discussed in mailing lists, i think you'll be able to find it with forum search or google Cheers, Sergey. 20.05.2012, 12:41, "Gil Hadas" : > Hi, > I am new in the OSG forum. > I have the same problem, > I am using exported fbx file , exported from maya, with skeleton. > I am using libfbxsdk-2013.1. > I suspect it is related to the warning: > "class osg::ComputeBoundingBoxCallback > InputStream::readObject(): Unsupported wrapper class osg::UpdateCallback" > any idea someone? > I have modified the code of the fbx plugin to support this sdk version. > if someone interested in the new FBX SDK code,how can I deliver my code > modification? > Thank you! > > Cheers, > Gil > > -- > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=47778#47778 > > ___ > 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] Proland: a new open source planet rendering engine
On 29 May 2012 10:43, michael kapelko wrote: > I'm wondering how is that related to OSG in the first place :) > > *prepares to advertise his backyard t-shirt sales in OSG mailing list* ;-) Given Eric hasn't replied it rather does look like he's spamming the OSG developer community with non OSG adverts. Perhaps Eric will provide a reciprocal arrangement where we can spam the INRIA community with adverts. Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Help: intersectionVisitor in a separate working thread cannot work when it is to visit a view node
Hi Shuiying, There isn't really anything others can do to help you as you are the one with your code with your particular OSG usage approach, it's really now down to you to work out what is going on with your application. The best thing I can suggest is step through the application with a debugger, perhaps you'll spot something wrong. Robert. On 29 May 2012 10:53, wang shuiying wrote: > Hello, Robert > > Sorry for the late response. But I still cannot figure out why the thread > calling "viewNode->accept(IntersectionVisitor)" just stops there without > going any further. I took a look at the source code of "accept()" function > as well as the "frame()" function of viewer, but I didn't find a mutex or > something like that to protect the node from being visited by two > nodevisitors at the same time. In my application, intersectionVisitor will > not change the scene data, only to get intersections. I try to do this > because I need the intersectionVisitor to change matrix and perform > intersection at a higher frequency than the main frame frequency of the > scenedata traversal. Is there any possibility to work this out? > > > Thank you very much in advance! > > Best regards > > Shuiying > > On 04/01/2012 09:05 PM, osg-users-requ...@lists.openscenegraph.org wrote: >> >> Message: 11 >> Date: Sun, 1 Apr 2012 18:44:28 +0100 >> From: Robert Osfield >> To: OpenSceneGraph Users >> Subject: Re: [osg-users] Help: intersectionVisitor in a separate >> working thread cannot work when it is to visit a view node >> Message-ID: >> >> >> Content-Type: text/plain; charset=ISO-8859-1 >> >> Hi Shuiying, >> >> It's not safe to read for a data structure that is written to be >> another thread. If you scene graph is not changing then it'll be safe >> to traverse multi-threaded without problem but if it's changing you'll >> need to serialize the reading from the writing threads in some manner. >> The normal frame loop that the OSG provides with the update and event >> traversal that can do updates occurring single threaded and before the >> cull and draw traversals start. >> >> Robert. >> >> On 1 April 2012 09:46, wang shuiying wrote: >>> >>> > Hello, >>> > >>> > In my programme, I have among others a view node and a thread. The >>> > geometries under the view node changes every frame. The thread >>> > controls the >>> > frequency at which an IntersectionVisitor visits the view node. >>> > >>> > However it turns out it doesn't work. When the intersectionVisitor is >>> > ready >>> > to visit the view node, it stops there, without going further. >>> > >>> > If ?the visit of intersectionVisitor is made to be a part of ?the >>> > updatecallback of view node, then it works. >>> > >>> > I wonder if the intersectionVisitor can work separately from the >>> > updatecallback of the node that it visits >>> > >>> > >>> > Thank you very much in advance for any advice! >>> > >>> > Shuiying >>> > ___ >>> > 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] Proland: a new open source planet rendering engine
I'm wondering how is that related to OSG in the first place :) *prepares to advertise his backyard t-shirt sales in OSG mailing list* ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Help: intersectionVisitor in a separate working thread cannot work when it is to visit a view node
Hello, Robert Sorry for the late response. But I still cannot figure out why the thread calling "viewNode->accept(IntersectionVisitor)" just stops there without going any further. I took a look at the source code of "accept()" function as well as the "frame()" function of viewer, but I didn't find a mutex or something like that to protect the node from being visited by two nodevisitors at the same time. In my application, intersectionVisitor will not change the scene data, only to get intersections. I try to do this because I need the intersectionVisitor to change matrix and perform intersection at a higher frequency than the main frame frequency of the scenedata traversal. Is there any possibility to work this out? Thank you very much in advance! Best regards Shuiying On 04/01/2012 09:05 PM, osg-users-requ...@lists.openscenegraph.org wrote: Message: 11 Date: Sun, 1 Apr 2012 18:44:28 +0100 From: Robert Osfield To: OpenSceneGraph Users Subject: Re: [osg-users] Help: intersectionVisitor in a separate working thread cannot work when it is to visit a view node Message-ID: Content-Type: text/plain; charset=ISO-8859-1 Hi Shuiying, It's not safe to read for a data structure that is written to be another thread. If you scene graph is not changing then it'll be safe to traverse multi-threaded without problem but if it's changing you'll need to serialize the reading from the writing threads in some manner. The normal frame loop that the OSG provides with the update and event traversal that can do updates occurring single threaded and before the cull and draw traversals start. Robert. On 1 April 2012 09:46, wang shuiying wrote: > Hello, > > In my programme, I have among others a view node and a thread. The > geometries under the view node changes every frame. The thread controls the > frequency at which an IntersectionVisitor visits the view node. > > However it turns out it doesn't work. When the intersectionVisitor is ready > to visit the view node, it stops there, without going further. > > If ?the visit of intersectionVisitor is made to be a part of ?the > updatecallback of view node, then it works. > > I wonder if the intersectionVisitor can work separately from the > updatecallback of the node that it visits > > > Thank you very much in advance for any advice! > > Shuiying > ___ > 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] Proland: a new open source planet rendering engine
So who will be porting this to OSG ;) ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] [AD] Win Free e-Copies of OpenSceneGraph Cookbook
Hi, I think Chapter 8, Managing Massive Amounts of Data will be most interesting part for me, because I'm working on program that manages very large data sets of geographical data. ... Thank you! Cheers, Filip[/i] -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=47904#47904 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] UseVertexAttributeAliasing and fixed-function pipeline
OK. It seems I got everything working nicely. It would be nice, anyway, to get a working OSG with text labels, statsHandler, etc. even when useModelViewAndProjectionUniforms and useVertexAttributeAliasing are set to TRUE; Thank you very much, Robert, for your assistance. Cheers, Pau -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=47903#47903 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
