Re: [osg-users] Change Camera FBO attachment
Hi Robert, thanks for your suggestion. The reason I went for a slave camera is that it makes it easier to add the FBO path at a later point, without touching the scenegraph, as it inherits the viewer's scene data by default. Besides inserting the cameras subgraph into the main graph, do you think it's reasonable to attach the FBO cameras group as the subgraph of a fake slave camera, and attach the main scene also as FBO camera child? I draw a little graph below for clarity. Thank you, Ricky VIEWER / \ MAIN CAM SLAVE_CAM | | | | |switch | | | / | \ |/ | \ | fbo1 fbo2 fbo3 | / / / \ / / / \ / / / \ / / / | | / / | | / / SCENE On Tue, Dec 18, 2012 at 9:25 PM, Robert Osfield robert.osfi...@gmail.comwrote: Hi Riccardo, Setting up the camera's rendering backend on each frame will be expensive. Personally I'd just using multiple RTT Camera each with their own FBO and Textures associated with them. Using a Switch, Sequence or NodeMask's you can select which of the Camera you want to render to on each frame. Robert. On 18 December 2012 17:24, Riccardo Corsi riccardo.co...@kairos3d.itwrote: Hi All, in my application I need an FBO camera to render different frames into different textures, because they will be used by an encoder and thus need to persist for some time. I haven't found an easy way to copy the contents of a texture or of an FBO into another texture. So during the update traversal I change the camera texture attachment with a new texture and call Renderer::SetCameraRequiresSetUp(true). Eveything works fine, but I'm wondering if there's a better/cleaner approach to achieve the same result, as I don't know whether requesting the camera setup every frame has a huge impact on perfomances. Thank you, Ricky ___ 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 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] Change Camera FBO attachment
Hi All, in my application I need an FBO camera to render different frames into different textures, because they will be used by an encoder and thus need to persist for some time. I haven't found an easy way to copy the contents of a texture or of an FBO into another texture. So during the update traversal I change the camera texture attachment with a new texture and call Renderer::SetCameraRequiresSetUp(true). Eveything works fine, but I'm wondering if there's a better/cleaner approach to achieve the same result, as I don't know whether requesting the camera setup every frame has a huge impact on perfomances. Thank you, Ricky ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Change Camera FBO attachment
Hi Riccardo, Setting up the camera's rendering backend on each frame will be expensive. Personally I'd just using multiple RTT Camera each with their own FBO and Textures associated with them. Using a Switch, Sequence or NodeMask's you can select which of the Camera you want to render to on each frame. Robert. On 18 December 2012 17:24, Riccardo Corsi riccardo.co...@kairos3d.itwrote: Hi All, in my application I need an FBO camera to render different frames into different textures, because they will be used by an encoder and thus need to persist for some time. I haven't found an easy way to copy the contents of a texture or of an FBO into another texture. So during the update traversal I change the camera texture attachment with a new texture and call Renderer::SetCameraRequiresSetUp(true). Eveything works fine, but I'm wondering if there's a better/cleaner approach to achieve the same result, as I don't know whether requesting the camera setup every frame has a huge impact on perfomances. Thank you, Ricky ___ 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
