Hi Auelien, When you say input, is it simply that you want to initialize the contents of the Camera 2's colour and depth buffers with the Camera 1's colour and depth buffers?
If so then one would typically just render the quad with the Camera 1 colour and depth buffers attached as textures and use a fragment shader to set the colour and depth buffers. I guess one might be able to use an OpenGL extension to blit the contents as well, but I haven't personally done this myself. Robert. On 22 October 2012 16:52, Aurelien Albert <[email protected]> wrote: > Hi, > > I have a scene graph with multiple cameras as follow : > > Camera 1 : > - clear mask : color and depth > - use FBO_Camera_1_Color as color buffer attachment > - use FBO_Camera_1_Depth as depth buffer attachment > > Camera 2 : > - clear mask : none > - use FBO_Camera_2_Color as color buffer attachment > - use FBO_Camera_2_Depth as depth buffer attachment > > > Now, I would like the "Camera 2" : > - to use "FBO_Camera_1_Color" as an INPUT color buffer (do not write into > this buffer, write into "FBO_Camera_2_Color") > - to use "FBO_Camera_1_Depth" as an INPUT depth buffer (do not write into > this buffer, write into "FBO_Camera_2_Depth") > > So this way : > - "FBO_Camera_1_Color" and "FBO_Camera_1_Depth" remains intact even after > camera 2 rendering. > - everywhere the camera 2 do not write data, data from camera 1 are visible > > The first solution would probably to copy FBOs before camera 2 rendering : > - "FBO_Camera_1_Color" into "FBO_Camera_2_Color" > - "FBO_Camera_1_Depth" into "FBO_Camera_2_Depth" > > How to do that ? Should I use another camera and a renderquad to perform the > copy, or is there any OSG functionnality to copy FBO ? > > > Even better, is there a second solution to provide an "input" buffer > attachement to a camera ? > > > Thank you! > > Aurelien > > ------------------ > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=50713#50713 > > > > > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
