Hi,
I have uploaded a screenshot, maybe anybody knows this "picture"...
http://img128.imageshack.us/my.php?image=91097949rh3.jpg
Cheers,
Christoph
Christoph Schäfer schrieb:
> Hi,
>
> I add some code fragments to point out whats going on. (thread a is app,
> thread b is gui/rendering)
>
> ----------- Startup phase -------------
> Thread A:
> OSG::Init()
>
> Thread B:
> OSG::ExternalThread::get("GUIThread")->initialize(1) // Use aspect 1
>
> // Wait for app thread to run into update() and be ready for sync
> OSG::Barrier::get("ModelSyncBarrier")->enter(2);
> (dynamic_cast<OSG::Thread
> *>(OSG::ThreadManager::getAppThread()))->getChangeList()->applyAndClear();
>
> OSG::Barrier::get("ModelSyncBarrier")->enter(2);
>
> Thread A: relevant code to show that setup navigation / rendering is
> going on
> _pRenderAction = OSG::RenderAction::create();
> // Don't draw or test any object taking up less than 15 pixels
> _pRenderAction->setOcclusionCullingMinimumFeatureSize(15);
> ...
> _pNavigator->setMode(OSG::Navigator::TRACKBALL);
> // will not work because the port of the passive window is not yet
> initialized/used
> // currently this is being worked around by setting it again in redraw()
> _pNavigator->setViewport(_pWin->getPort(0));
> _pNavigator->setCameraTransformation(pCart);
> _pNavigator->updateCameraTransformation();
> ...
>
> Thread A: this is the relevant code in update()
> if (m_syncForRenderingNeeded)
> {
> if (_pNavigator)
> _pNavigator->updateCameraTransformation();
>
> OSG::commitChanges();
>
> m_syncBarrierP->enter(2);
> m_syncBarrierP->enter(2);
>
> m_syncForRenderingNeeded = false;
> }
>
> ----------- Running phase, update() is called continuously by the app
> core -------------
>
> Thread B: redraw()
> m_syncForRenderingNeeded = true;
>
> m_syncBarrierP->enter(2);
> m_appThreadP->getChangeList()->applyAndClear();
> m_syncBarrierP->enter(2);
>
> OSG::commitChanges();
>
> Thread A:
> update()
>
> ----------- Model loading -------------
> Thread A: loadModel()
> ...
> OSG::NodeMTRefPtr pNewNode = OSG::Node::create();
> OSG::GroupMTRefPtr g = OSG::Group::create();
> pNewNode->setCore(g);
>
> pNewNode->addChild(OSG::SceneFileHandler::the()->read(file.c_str()));
> pParentNode->addChild(pNewNode);
>
> setRoot(pParentNode);
>
> showAll();
> ...
>
> Thread B:
> redraw()
>
> Thread A:
> update()
>
>
> Cheers,
> Christoph
>
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