Hi everyone,
I'm new around here, but I'll try to think the questions through, at least for
the first couple of days :)
So, to the point:
I have a scene with a small HUD, and in that HUD a text that is changing based
on some keypresses. What I'm trying to do is, in the event handler, set an
update callback for the text, and then, immediately after that, start an
algorithm on the scene. The callback is supposed to measure the total time of
that algorithm.
The images in the attachment illustrate the point.
The code of the keyboard press handler looks like this:
Code:
if ( ea.getKey()==osgGA::GUIEventAdapter::KEY_F5 )
{
if (fnn.getNode() != NULL)
{
osg::Object* obj =
dynamic_castosg::Object*(dynamic_castosg::Geode*(fnn.getNode())-getDrawable(0));
osgText::Text* hudText =
dynamic_castosgText::Text*(obj);
BruteForceCallback* bfCb = new
BruteForceCallback();
hudText-setUpdateCallback(bfCb);
/*
for (int i = 0; i 10; i++)
for (int j = 0; j 2; j++)
{
int x = 0;
x += 5;
}
std::cout Finished. std::endl;
*/
//hudText-setUpdateCallback(NULL);
//hudText-setText(Algorithm: +
bfCb-getAlgorithmName()
// + \nCamera positioned.\nTotal time:
+ bfCb-getTimeAsString());
}
return true;
}
The for loop is a placeholder, and I've tried adding to it commands such as
requestRedraw() and frame(), but then the program freezes. Without it, it of
course waits until the for loop is done, and then updates the text.
I probably should have asked this question before implementing the callbacks,
but better late than never :) , so how can I force the update of the HUD text
periodically during the calculations? Is this a good way to do it at all? I'd
really prefer a single-threaded program...
And one last question:
the program crashes on hudText-setUpdateCallback(NULL);
How do I remove the callback properly after the algorithm is done?
Thank you so much for any help!
Cheers,
Inos [/code]
--
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=22643#22643
Attachments:
http://forum.openscenegraph.org//files/afterkeypress_163.png
http://forum.openscenegraph.org//files/beforekeypress_652.png
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