Hi,
i'm working on a AR application. I'm using openscenegraph to overlap 3D objects
on a texture in wich i render a video taken from a camera. Now i need to take a
kind of snapshot of the scene (in which i need the 3d object too off course) in
every frame in order to put it in a buffer and than send it to a remote
workstation. The code i use for this snapshot is the following:
Code:
osg::ref_ptr<osg::Image> shot = new osg::Image();
shot->allocateImage(640*2, 480*2, 1, GL_RGB, GL_UNSIGNED_BYTE);
osg::ref_ptr<osg::Camera> camera = viewer.getCamera();
framedata->stPipe->frame = cvCreateImage(cvSize(640*2, 480*2), IPL_DEPTH_8U,3 );
camera->attach(osg::Camera::COLOR_BUFFER, shot.get());
double ts,ts1 = 0;
while (!viewer.done()){
ts=(double) getTickCount();
viewer.frame();
framedata->stPipe->frame->width=shot->s();
framedata->stPipe->frame->height=shot->t();
cvSetData(framedata->stPipe->frame,shot->data(),shot->s()*3);
framedata->stPipe->run();
ts1=(double)getTickCount();
}
If i run my application on my desktop workstation i've not any kind of
problems..Instead if i run it on a tablet (with 4Gb of RAM,i5 processor) i have
a slow down of performances..lookin better i've noticed that the problem is the
line:
Code:
camera->attach(osg::Camera::COLOR_BUFFER, shot.get());
if i take off this line the application runs as before..if i add it the viewer
cicle runs something like 100 times slower...just on the tablet...on the
desktop pc i haven't this problem...have you got any ideas?
Thank you very much!
Cheers,
Antonio
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Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=50908#50908
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