Re: [osg-users] Turning off main osgViewer camera
Hi, jake chambers wrote: Hi, Thanks for the replies. Brian: when I set the nodemask on the main camera to zero it no longer renders, which is good, but the FBO no longer gets rendered (I get a totally black image in the associated osg::Image). JP: If I just insert my FBO into the scene (as POST_RENDER) two things happen when I render a frame: I get the correct image in my FBO, but the main camera also renders. I want to be able to choose if the the main camera should render or not when the FBO is in use. I'm still confused about what you actually want to do. Would it be OK if the main camera image is just empty? If so, if you add the scene to your FBO camera (make it pre_render) and add only the node containing the FBO camera to your main camera, the main camera should render nothing (you should get the clearcolor) when you call viewer.frame(). The main camera would only render the scene if a scene is attached to it, it won't render the FBO camera's scene. I looked at osgautocapture, but it doesn't do what I need to do because the main camera always renders (and has to as the saved image comes from a DrawCallback on the main camera). Also see osgscreencapture and grep for screencapturehandler. jp I've also tried simply putting my fbo directly into the viewer with: savedcam=osgviewer->getCamera() osgviewer->setCamera(myfbo) osgviewer->renderingTraversals() osgviewer->setCamera(savedcam) But when I do this not only do I not get an image in my FBO, but the viewer (with the normal camera) no longer renders afterwards. I suspect a workable solution would be to create a duplicate Viewer, setup with only an FBO as the main camera, and which shares the scene (and database pager, etc) with the first Viewer. Then when I need to save screenshot(s) I can just explicitly render with the second Viewer. But surely such a drastic solution shouldn't be necessary? Thank you! Cheers, jake -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=16120#16120 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org -- This message is subject to the CSIR's copyright terms and conditions, e-mail legal notice, and implemented Open Document Format (ODF) standard. The full disclaimer details can be found at http://www.csir.co.za/disclaimer.html. This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. MailScanner thanks Transtec Computers for their support. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Turning off main osgViewer camera
Hi, Thanks for the replies. Brian: when I set the nodemask on the main camera to zero it no longer renders, which is good, but the FBO no longer gets rendered (I get a totally black image in the associated osg::Image). JP: If I just insert my FBO into the scene (as POST_RENDER) two things happen when I render a frame: I get the correct image in my FBO, but the main camera also renders. I want to be able to choose if the the main camera should render or not when the FBO is in use. I looked at osgautocapture, but it doesn't do what I need to do because the main camera always renders (and has to as the saved image comes from a DrawCallback on the main camera). I've also tried simply putting my fbo directly into the viewer with: savedcam=osgviewer->getCamera() osgviewer->setCamera(myfbo) osgviewer->renderingTraversals() osgviewer->setCamera(savedcam) But when I do this not only do I not get an image in my FBO, but the viewer (with the normal camera) no longer renders afterwards. I suspect a workable solution would be to create a duplicate Viewer, setup with only an FBO as the main camera, and which shares the scene (and database pager, etc) with the first Viewer. Then when I need to save screenshot(s) I can just explicitly render with the second Viewer. But surely such a drastic solution shouldn't be necessary? Thank you! Cheers, jake -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=16120#16120 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Turning off main osgViewer camera
Try setting the main camera node mask to 0 when you don't want it to render and 0x when you do. Brian This is a PRIVATE message. If you are not the intended recipient, please delete without copying and kindly advise us by e-mail of the mistake in delivery. NOTE: Regardless of content, this e-mail shall not operate to bind CSC to any order or other contract unless pursuant to explicit written agreement or government initiative expressly permitting the use of e-mail for such purpose. • -osg-users-boun...@lists.openscenegraph.org wrote: - To: OpenSceneGraph Users From: "J.P. Delport" Sent by: osg-users-boun...@lists.openscenegraph.org Date: 08/11/2009 10:15AM Subject: Re: [osg-users] Turning off main osgViewer camera Hi, sorry I might have answered too fast. What do you want the main camera to render when you are taking screenshots? What is it rendering when when you only attach the FBO camera? AFAIK you still need to call viewer frame() to trigger the FBO, but you can make the main camera just render nothing. If you want to run an FBO camera without creating a window, then consider the pbuffer option for the main frame buffer. See also maybe the osgscreencapture example. jp J.P. Delport wrote: > Hi, > > have a look at the osgautocapture example. Set the main camera to render > offscreen, pbuffer. > > jp > > jake chambers wrote: >> Hi, >> >> I have an application where I setup a "normal" osgViewer view with >> setUpViewOnSingleScreen(). This works fine. >> >> I also create an FBO camera to which I add my scene. When I want to >> take a screenshot of the application I call >> osgviewer->setSceneData(myFBOCamera) and render via >> osgviewer->eventTraversal() / updateTraversal() / >> renderingTraversals(). After I get the screenshot I restore my normal >> scene with osgviewer->setSceneData(mySceneData). This also works fine >> for taking screenshots. >> >> What I want to do now is to turn off the "main" camera whilst I render >> the FBO (ie if I create a lot of screenshots for a movie I don't want >> to render to the screen). How can I turn off the main camera and >> render only to the FBO? >> I've tried calling osgviewer->setCamera(NULL) without sucess. Indeed >> when I meddle with the main camera I dont get a valid image from my >> FBO. I think this makes sense as the FBO is under the main camera(?). >> I also tried calling osgviewer->setCamera(myFBO) but no luck that way >> either. I also can't restore the original camera to the osgviewer. >> >> Perhaps I am solving the problem the wrong way - is there a better >> method? Perhaps having two seperate osgViewer objects? But then I >> think I have only one conceptual "View" (my FBO always shows the same >> view as the main camera, it's only a question of if the main camera >> should render an image or not), so having one Viewer, one View and two >> Cameras feels correct - it's just that it doesn't work :-) >> >> >> Thank you! >> >> Cheers, >> jake >> >> -- >> Read this topic online here: >> http://forum.openscenegraph.org/viewtopic.php?p=16079#16079 >> >> >> >> >> >> ___ >> osg-users mailing list >> osg-users@lists.openscenegraph.org >> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > -- This message is subject to the CSIR's copyright terms and conditions, e-mail legal notice, and implemented Open Document Format (ODF) standard. The full disclaimer details can be found at http://www.csir.co.za/disclaimer.html. This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. MailScanner thanks Transtec Computers for their support. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Turning off main osgViewer camera
Hi, sorry I might have answered too fast. What do you want the main camera to render when you are taking screenshots? What is it rendering when when you only attach the FBO camera? AFAIK you still need to call viewer frame() to trigger the FBO, but you can make the main camera just render nothing. If you want to run an FBO camera without creating a window, then consider the pbuffer option for the main frame buffer. See also maybe the osgscreencapture example. jp J.P. Delport wrote: Hi, have a look at the osgautocapture example. Set the main camera to render offscreen, pbuffer. jp jake chambers wrote: Hi, I have an application where I setup a "normal" osgViewer view with setUpViewOnSingleScreen(). This works fine. I also create an FBO camera to which I add my scene. When I want to take a screenshot of the application I call osgviewer->setSceneData(myFBOCamera) and render via osgviewer->eventTraversal() / updateTraversal() / renderingTraversals(). After I get the screenshot I restore my normal scene with osgviewer->setSceneData(mySceneData). This also works fine for taking screenshots. What I want to do now is to turn off the "main" camera whilst I render the FBO (ie if I create a lot of screenshots for a movie I don't want to render to the screen). How can I turn off the main camera and render only to the FBO? I've tried calling osgviewer->setCamera(NULL) without sucess. Indeed when I meddle with the main camera I dont get a valid image from my FBO. I think this makes sense as the FBO is under the main camera(?). I also tried calling osgviewer->setCamera(myFBO) but no luck that way either. I also can't restore the original camera to the osgviewer. Perhaps I am solving the problem the wrong way - is there a better method? Perhaps having two seperate osgViewer objects? But then I think I have only one conceptual "View" (my FBO always shows the same view as the main camera, it's only a question of if the main camera should render an image or not), so having one Viewer, one View and two Cameras feels correct - it's just that it doesn't work :-) Thank you! Cheers, jake -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=16079#16079 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org -- This message is subject to the CSIR's copyright terms and conditions, e-mail legal notice, and implemented Open Document Format (ODF) standard. The full disclaimer details can be found at http://www.csir.co.za/disclaimer.html. This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. MailScanner thanks Transtec Computers for their support. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Turning off main osgViewer camera
Hi, have a look at the osgautocapture example. Set the main camera to render offscreen, pbuffer. jp jake chambers wrote: Hi, I have an application where I setup a "normal" osgViewer view with setUpViewOnSingleScreen(). This works fine. I also create an FBO camera to which I add my scene. When I want to take a screenshot of the application I call osgviewer->setSceneData(myFBOCamera) and render via osgviewer->eventTraversal() / updateTraversal() / renderingTraversals(). After I get the screenshot I restore my normal scene with osgviewer->setSceneData(mySceneData). This also works fine for taking screenshots. What I want to do now is to turn off the "main" camera whilst I render the FBO (ie if I create a lot of screenshots for a movie I don't want to render to the screen). How can I turn off the main camera and render only to the FBO? I've tried calling osgviewer->setCamera(NULL) without sucess. Indeed when I meddle with the main camera I dont get a valid image from my FBO. I think this makes sense as the FBO is under the main camera(?). I also tried calling osgviewer->setCamera(myFBO) but no luck that way either. I also can't restore the original camera to the osgviewer. Perhaps I am solving the problem the wrong way - is there a better method? Perhaps having two seperate osgViewer objects? But then I think I have only one conceptual "View" (my FBO always shows the same view as the main camera, it's only a question of if the main camera should render an image or not), so having one Viewer, one View and two Cameras feels correct - it's just that it doesn't work :-) Thank you! Cheers, jake -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=16079#16079 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org -- This message is subject to the CSIR's copyright terms and conditions, e-mail legal notice, and implemented Open Document Format (ODF) standard. The full disclaimer details can be found at http://www.csir.co.za/disclaimer.html. This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. MailScanner thanks Transtec Computers for their support. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] Turning off main osgViewer camera
Hi, I have an application where I setup a "normal" osgViewer view with setUpViewOnSingleScreen(). This works fine. I also create an FBO camera to which I add my scene. When I want to take a screenshot of the application I call osgviewer->setSceneData(myFBOCamera) and render via osgviewer->eventTraversal() / updateTraversal() / renderingTraversals(). After I get the screenshot I restore my normal scene with osgviewer->setSceneData(mySceneData). This also works fine for taking screenshots. What I want to do now is to turn off the "main" camera whilst I render the FBO (ie if I create a lot of screenshots for a movie I don't want to render to the screen). How can I turn off the main camera and render only to the FBO? I've tried calling osgviewer->setCamera(NULL) without sucess. Indeed when I meddle with the main camera I dont get a valid image from my FBO. I think this makes sense as the FBO is under the main camera(?). I also tried calling osgviewer->setCamera(myFBO) but no luck that way either. I also can't restore the original camera to the osgviewer. Perhaps I am solving the problem the wrong way - is there a better method? Perhaps having two seperate osgViewer objects? But then I think I have only one conceptual "View" (my FBO always shows the same view as the main camera, it's only a question of if the main camera should render an image or not), so having one Viewer, one View and two Cameras feels correct - it's just that it doesn't work :-) Thank you! Cheers, jake -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=16079#16079 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
