HI Abhishek,
I use Kubuntu for my development work, this is debian based, and so
far haven't seen this crash. So there must be something slightly
different happening on your system to reveal the bug. Normally with
differences like this looking at the OpenGL driver would be the
obvious thing to do but the stack trace points to std::find called
within the OSG extension checking code, in which case it looks like an
OSG problem or a build problem.
I don't know what might be wrong, so we'll have to work through the
possibilities. The first thing to do would to test whether there is
some threading issue by running osgwindows single threaded -
osgViewer::Viewer by default will run multi-threaded if multiple cores
are available but you can override this default by adding a
viewer.setThreadingModel(osgViewer::Viewer::SingleThreaded);
Or by setting the env:
export OSG_THREADING=SingleThreaded
Then run osgwindows.
Robert.
On 25 May 2013 11:37, Abhishek Bansal <[email protected]> wrote:
> Hi,
>
> I am trying to run osgWindows example on Debian 6.0.7 (squeeze) with OSG
> version 3.0.1. I am using Eclipse 3.7 (indigo) as IDE. The problem is that
> this example runs fine on windows but its crashing on linux for me. Many
> times it terminates by itself and other times it gives following callstack
>
>
> Code:
>
> std::string::find() at 0x7ffff4236d18
> osg::isGLExtensionOrVersionSupported() at GLExtensions.cpp:227 0x7ffff7942444
> osg::isGLExtensionSupported() at GLExtensions.cpp:90 0x7ffff7941aa3
> osg::FragmentProgram::Extensions::setupGLExtensions() at
> FragmentProgram.cpp:263 0x7ffff78e122e
> Extensions() at FragmentProgram.cpp:234 0x7ffff78e1021
> osg::FragmentProgram::getExtensions() at FragmentProgram.cpp:223
> 0x7ffff78e0ee3
> osg::FragmentProgram::flushDeletedFragmentProgramObjects() at
> FragmentProgram.cpp:59 0x7ffff78dfc48
> osg::flushDeletedGLObjects() at GLObjects.cpp:31 0x7ffff794c2cf
> osgUtil::SceneView::flushDeletedGLObjects() at SceneView.cpp:1,038
> 0x7ffff7240c0b
> osgUtil::SceneView::draw() at SceneView.cpp:1,064 0x7ffff7240d8e
> osgViewer::Renderer::draw() at Renderer.cpp:725 0x7ffff63f18d2
> osgViewer::Renderer::operator() at Renderer.cpp:892 0x7ffff63f2b8a
> osg::GraphicsContext::runOperations() at GraphicsContext.cpp:756
> 0x7ffff79553bf
> osg::RunOperations::operator() at GraphicsThread.cpp:137 0x7ffff795fa9c
> osg::GraphicsOperation::operator() at GraphicsThread.cpp:53 0x7ffff795f38a
> osg::OperationThread::run() at OperationThread.cpp:426 0x7ffff79c676d
> osg::GraphicsThread::run() at GraphicsThread.cpp:38 0x7ffff795f2f0
> OpenThreads::ThreadPrivateActions::StartThread() at PThread.cpp:181
> 0x7ffff5b96806
> start_thread() at pthread_create.c:300 0x7ffff377f8ca
> clone() at clone.S:112 0x7ffff3a64b6d
> 0x0
>
>
>
>
>
> I checked with single slave cameras. It works fine with both individual slave
> cameras but when I un-comment both cameras it gives me crash. Here is code
> for reference
>
>
> Code:
>
> #include <osgDB/ReadFile>
> #include <osgUtil/Optimizer>
> #include <osgViewer/Viewer>
>
>
> #include <iostream>
>
> int main( int argc, char **argv )
> {
> // use an ArgumentParser object to manage the program arguments.
> osg::ArgumentParser arguments(&argc,argv);
>
> // read the scene from the list of file specified commandline args.
> osg::ref_ptr<osg::Node> loadedModel = osgDB::readNodeFiles(arguments);
>
> // if not loaded assume no arguments passed in, try use default mode instead.
> if (!loadedModel) loadedModel = osgDB::readNodeFile("cow.osgt");
>
> // if no model has been successfully loaded report failure.
> if (!loadedModel)
> {
> std::cout << arguments.getApplicationName() <<": No data loaded" << std::endl;
> return 1;
> }
>
> // construct the viewer.
> osgViewer::Viewer viewer;
>
> int xoffset = 40;
> int yoffset = 40;
>
> // left window + left slave camera
> {
> osg::ref_ptr<osg::GraphicsContext::Traits> traits = new
> osg::GraphicsContext::Traits;
> traits->x = xoffset + 0;
> traits->y = yoffset + 0;
> traits->width = 600;
> traits->height = 480;
> traits->windowDecoration = true;
> traits->doubleBuffer = true;
> traits->sharedContext = 0;
>
> osg::ref_ptr<osg::GraphicsContext> gc =
> osg::GraphicsContext::createGraphicsContext(traits.get());
>
> osg::ref_ptr<osg::Camera> camera = new osg::Camera;
> camera->setGraphicsContext(gc.get());
> camera->setViewport(new osg::Viewport(0,0, traits->width, traits->height));
> GLenum buffer = traits->doubleBuffer ? GL_BACK : GL_FRONT;
> camera->setDrawBuffer(buffer);
> camera->setReadBuffer(buffer);
>
> // add this slave camera to the viewer, with a shift left of the projection
> matrix
> viewer.addSlave(camera.get(), osg::Matrixd::translate(1.0,0.0,0.0),
> osg::Matrixd());
> }
>
> // right window + right slave camera
> {
> osg::ref_ptr<osg::GraphicsContext::Traits> traits = new
> osg::GraphicsContext::Traits;
> traits->x = xoffset + 600;
> traits->y = yoffset + 0;
> traits->width = 600;
> traits->height = 480;
> traits->windowDecoration = true;
> traits->doubleBuffer = true;
> traits->sharedContext = 0;
>
> osg::ref_ptr<osg::GraphicsContext> gc =
> osg::GraphicsContext::createGraphicsContext(traits.get());
>
> osg::ref_ptr<osg::Camera> camera = new osg::Camera;
> camera->setGraphicsContext(gc.get());
> camera->setViewport(new osg::Viewport(0,0, traits->width, traits->height));
> GLenum buffer = traits->doubleBuffer ? GL_BACK : GL_FRONT;
> camera->setDrawBuffer(buffer);
> camera->setReadBuffer(buffer);
>
> // add this slave camera to the viewer, with a shift right of the projection
> matrix
> viewer.addSlave(camera.get(), osg::Matrixd::translate(-1.0,0.0,0.0),
> osg::Matrixd());
> }
>
>
> // optimize the scene graph, remove rendundent nodes and state etc.
> osgUtil::Optimizer optimizer;
> optimizer.optimize(loadedModel.get());
>
> // set the scene to render
> viewer.setSceneData(loadedModel.get());
>
> return viewer.run();
> }
>
>
>
>
>
> ...
>
> Thank you!
>
> Cheers,
> Abhishek
>
> ------------------
> Read this topic online here:
> http://forum.openscenegraph.org/viewtopic.php?p=54186#54186
>
>
>
>
>
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