Hiya, I was able to display osg content on Qt's Declarative interface (QtQuick, QML, etc) using the osg::GraphicsWindowEmbedded class. I followed the examples for the FLTK and GLUT toolkits to get this (sort of) working. There are a few of things I don't understand, and would appreciate some clarification on.
* What do the parameters passed to the osgViewer::GraphicsWindowEmbedded constructor (x,y,w,h) actually do? I played around with the values and it had no visible effect on my displayed result * What does GraphicsWindowEmbedded do behind the scenes? Since you don't explicitly specify a GraphicsContext for it, does that mean it uses the OpenGL context of the framework you're embedding it into? * I noticed that the viewport is rendered onto the window in absolute coordinates. With QtQuick, when you create an item to display on the screen, it has a child/parent relationship and coordinates are relative to the parent. Moving the parent will also move the child as you'd expect. This doesn't happen with GraphicsWindowEmbedded though, probably because with QtQuick, all the elements are painted onto one 'canvas' (I think), and GraphicsWindowEmbedded just paints straight onto that. * If, instead of having GraphicsWindowEmbedded draw on my screen whenever I call the viewer's frame() method, is it possible to render the viewer camera's output to a texture that I could manually draw onto a quad or something? This way I don't have to specify absolute coordinates for the viewport like I mentioned above. I already tried this by rendering to an osg::Image, then painting it on the screen with Qt, but I have a relatively old computer and osg::Image->readPixels() takes too much time. My results with the osgscreencapture example were also pretty terrible (15-16 fps @ 640x480). For anyone else who needs to do something similar, here's some scrap code you can use to define a QDeclarativeItem that'll show an osg view. http://pastie.org/3478592 (header) http://pastie.org/3478602 (source) Regards, Preet _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
