Hi Robert,
Here is code that produces the problem.
I'm building/running on Ubuntu 8.04 with osg 2.4
#include <iostream>
#include <vector>
#include <string>
#include <osg/Node>
#include <OpenThreads/Thread>
#include <osgDB/ReadFile>
#include <osgViewer/Viewer>
#include <osgViewer/ViewerEventHandlers>
class viewerThread: public OpenThreads::Thread
{
public:
viewerThread( osg::Node* n ): OpenThreads::Thread(), _scene(n){}
virtual void run(){
osgViewer::Viewer viewer;
_pViewer = &viewer;
viewer.addEventHandler(new osgViewer::StatsHandler());
viewer.addEventHandler(new osgViewer::ThreadingHandler());
viewer.addEventHandler(new osgViewer::WindowSizeHandler());
viewer.setSceneData(_scene);
viewer.setThreadingModel(osgViewer::Viewer::ThreadPerContext);
viewer.run();
_pViewer = NULL;
}
void cancelViewer(){
if( _pViewer != NULL )
_pViewer->setDone( true );
}
private:
osg::Node* _scene;
osgViewer::Viewer* _pViewer;
};
int main(int argc, wchar_t* argv[])
{
std::vector<viewerThread*> garbage;
osg::ref_ptr<osg::Node> n = osgDB::readNodeFile("cow.osg");
if( !n ) return -1;
bool bRun = true;
do{
std::wstring wsCommand;
std::wcout << L"Enter Command : ";
std::getline( std::wcin, wsCommand, L'\n' );
if( wsCommand == L"quit" ){
bRun = false;
}else if ( wsCommand == L"view" ){
viewerThread* vThread = new viewerThread( n.get() );
garbage.push_back( vThread );
vThread->startThread();
}
}while( bRun );
for( unsigned int i = 0; i < garbage.size(); i++ ){
viewerThread* p = garbage.at( i );
p->cancelViewer();
p->cancel();
while ( p->isRunning() )
{
OpenThreads::Thread::microSleep(50);
}
delete p;
}
garbage.clear();
return 1;
}
Regards,
David Johansson
On Thu, Aug 14, 2008 at 10:14 AM, Robert Osfield
<[EMAIL PROTECTED]> wrote:
> Hi David,
>
> I really don't know what is up with your usage, there really isn't
> enough info about how you set up things to know where things are going
> astray.
>
> A window being black suggest to be that rendering itself hasn't
> started yet, just that the window has been realized. The osgViewer
> doesn't support multiple viewers sharing a single GraphicsContext
> (this is what you should use osgViewer::CompositeViewer for so you can
> have multiple views sharing a single context).
>
> Robert.
>
> On Wed, Aug 13, 2008 at 7:09 PM, David Johansson <[EMAIL PROTECTED]> wrote:
>> Hi Everyone,
>>
>> I have a problem with threading and osg::Viewer.
>>
>> Basically i create and recreate a bunch of threads that runs a new
>> Viewer instance and the problem is that the viewers 'draw area' turns
>> up black if i ever close a Viewer.
>>
>> Thread1 creates Window1 - viewing Node1 - OK.
>> Thread2 creates Window2 - viewing Node1 - Ok.
>> User closes Window1
>> Thread1 dies.
>> Thread3 creates Window3 - viewing Node1 -- Will turn up black
>> Thread4 creates Window4 - viewing Node1 -- All Ok..
>> Thread5 creates Window5 - viewing Node1 -- Also Ok
>> User closes window 2
>> Thread2 dies.
>> Thread6 creates Window6 - viewing Node1 -- Will turn up black
>> Thread7 creates Window7 - viewing Node1 -- Ok again.
>> User closes all windows
>> Thread3 - 7 dies.
>> Thread8 creates Window8 - viewing Node1 -- Black.
>> Thread9 creates Window9 - viewing Node1 -- Black.
>> Thread10 creates Window10 - viewing Node1 -- Black.
>> Thread11 creates Window11 - viewing Node1 -- Black.
>> Thread12 creates Window12 - viewing Node1 -- Black.
>> Thread13 creates Window13 - viewing Node1 -- Ok!
>>
>> I noticed that After closing all windows, i had 5 windows running that
>> acctually showed something(5 new Contexts??). After that i had to
>> create 5 threads (that were black) until getting a new view that
>> wasn't black.
>>
>> Looking through the code my guess is that "graphicsContexts" are
>> getting reused, however not reset or something like that.
>>
>> This is the code i use to set-up my viewers:
>>
>> osgViewer::Viewer viewer;
>> viewer.addEventHandler(new osgViewer::StatsHandler());
>> viewer.addEventHandler(new osgViewer::ThreadingHandler());
>> viewer.addEventHandler(new osgViewer::WindowSizeHandler());
>> viewer.setSceneData(g);
>> viewer.setThreadingModel(osgViewer::Viewer::ThreadPerContext); /**/
>> viewer.run();
>>
>> Any help would be great!
>>
>> Regards,
>>
>> David Johansson
>> _______________________________________________
>> osg-users mailing list
>> [email protected]
>> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
>>
> _______________________________________________
> osg-users mailing list
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