Another update: Well, I kind of found a solution, but it's really ugly. If I remove the slave camera from the viewer, then set the new graphics context, and then add the slave cam to the viewer again, it works with a new resolution for each screenshot. This seems very un-elegant though, and I'm pretty sure that this is a misuse of OSG in comparison to what was intended.
Jesper D. Thomsen ________________________________ From: osg-users-boun...@lists.openscenegraph.org [osg-users-boun...@lists.openscenegraph.org] On Behalf Of Jesper D. Thomsen [...@anybodytech.com] Sent: Wednesday, May 27, 2009 2:42 PM To: OpenSceneGraph Users Subject: Re: [osg-users] Using a slave camera to take screenshots in a different resolution than the main camera. I just tried changing the main camere to a slave camera (as supposedly a main+slave cam combination is bad somehow). This changed the behaviour such that the screenshot slave camere can now take screenshots in any resolution for the first screenshot, but subsequent screenshots have the same rendered area as the first screenshot, which either results in black area (when the second screenshot has higher resolution) or a cropped screenshot (when the new screenshot is in lower resolution). I'm assigning a fresh graphics context to the slave camera before each screenshot, but it seems to ignore the resolution in the subsequent graphics contexts. I'm pretty sure it's something really simple I'm forgetting to do. Regards, Jesper D. Thomsen ________________________________ From: osg-users-boun...@lists.openscenegraph.org [osg-users-boun...@lists.openscenegraph.org] On Behalf Of Jesper D. Thomsen [...@anybodytech.com] Sent: Wednesday, May 27, 2009 1:18 PM To: osg-users@lists.openscenegraph.org Subject: [osg-users] Using a slave camera to take screenshots in a different resolution than the main camera. Hi all, I'm trying to use a slave camera to take screenshots in a different resolution than the main camera. I have tried setting the slave cameras renderingimplementation to Frame_buffer_object and pixel_buffer_rtt and have made a graphics context with the desired resolution, but I'm always just getting a screenshot where I have the desired content in the original camera's resolution in the lower left corner and black pixels in the rest of the screenshots area. I've tried changing the background color of the slave cameras graphics context, and this works fine with only the screenshot being affected and the windows rendered by the main camera looking as normal, so I'm guessing that it's using the FBO for the slave camera. I'm guessing that I have forgotten some kind of statement regarding the slave camera's graphics context. regards, and thanks in advance. Jesper D. Thomsen
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