Hello, I'm trying to write a program where the renderer is running on a
separate thread. On the main thread I want to control the command line inputs
but as soon as I add scenedata to the osgViewer which is stored in the renderer
then the renderer takes over the standard input. std::cin in the main thread is
ignored. If I put std::cin in the renderer thread however the program pauses
and expects an input from the command line.
Does anyone know how I can prevent osgViewer from taking over the command line?
I have attached sample code to this post where I demonstrate the problem.
Code:
#include
#include
#include
class MiniRenderer: public OpenThreads::Thread
{
public:
void addModel(osg::Node* node)
{
_nodes.push_back(node);
}
void run()
{
_viewer.setUpViewInWindow(0, 0, 640, 480);
_viewer.realize();
_sceneRoot = new osg::Group;
_run = true;
while(_run)
{
if(_nodes.size()>0)
{
for(unsigned int i = 0; i < _nodes.size(); ++i)
_sceneRoot->addChild(_nodes[i]);
_nodes.clear();
_viewer.setSceneData(_sceneRoot.get());
}
int test = -2;
std::cout << "In Thread: " << std::endl;
std::cin >> test;
std::cout << "In Thread : " << test << std::endl;
_viewer.frame();
}
}
bool _run;
osg::ref_ptr _sceneRoot;
osgViewer::Viewer _viewer;
std::vector > _nodes;
};
int main( int argc, char **argv )
{
std::cout << "Starting thread" << std::endl;
MiniRenderer *minirenderer = new MiniRenderer();
mr->startThread();
osg::ref_ptr root = osgDB::readNodeFile("cessna.osg");
minirenderer->addModel(root);
int test = -1;
std::cout << "Main cin" << std::endl;
std::cin >> test;
std::cout << "Main cin: " << test << std::endl;
while(true)
{
}
return 0;
}
Edit: Parts of my code seem to have gone missing after I posted this, so here's
a pastebin link with the code:
pastebin . com / GxFAbZvf
I found one way to be able to get input from the console by using
std::cin.clear() and std::ignore(std::numeric_limit<std::streamsize>::max,
'\n'). But this code would work in some places but not in others, so I can't
use this since it's very unreliable..
Kind Regards
Hoffe
------------------
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http://forum.openscenegraph.org/viewtopic.php?p=49913#49913
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