Hi, I am trying to do the following: Create a Group with children attached. One child is video coming from a camera/file and the rest are overlays that should be visible on the video. Sometimes there is a shader on the video, depending on the video format (Mono8 vs Mono16).
I then want to display the video on the screen using a View and while displaying, I want to record the displayed video to a buffer of Images. The recorded video must show the overlays that were visible at the time of the frame. I have done the following (mostly from example applications, other libs and web searches): - I have code that set up my root Group with a few nodes added. - One node is a Group that displays TextureRectangle (video feed from camera/file) - The other nodes are mostly overlays that I overlay on the video. - I have a Viewer that is responsible for displaying this tree (video + overlays) All of this is working fine. Now to record the displayed video to a buffer of images I do the following (Also from examples): - I have a recorder class that takes the root node, and sets up a Camera for this recorder on the root. - I then set the setRenderTargetImplementation() to Camera::FRAME_BUFFER_OBJECT - I then attach an Image as a Camera::BufferComponent and add the root node to the children of the camera (Camera::addChild()). - Lastly I set a DrawCallback object using the setPostDrawCallback() function on the camera. Now the problem is: The operator ()(osg::RenderInfo &) functor is never called on my DrawCallback object. I have an idea why this is not working (very limited knowledge of OSG): If I do not add the root to the camera, but instead add the Camera to the root Group (Group::addChild()) it does go into my functor, but all I record is blue images. So I need to add the root node to the camera so that it will have the Nodes to record, and add the camera to the root node, so that it will get updated when the view is drawn. But how do I do this without breaking the app due to the obvious circular dependency (I have tried)? Or is there an alternative way for me to do this? I have tried adding my DrawCallback object onto the Camera of the View to then write the pixels into an image in the functor, but when the size of the View changes (due to for example the app gets resized), I do not get the whole image anymore in my Image. Thus the reason why I am attempting to create a second camera (will this even work??). Thank you! Cheers, Carel ------------------ Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=51152#51152 _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
