Have a look in the mail archive for osgcubemapprerender/(or osgprerendercubemap). There is a sample attached in one of the mail that do that. Was in the recent discussion ... -Nick
On Tue, Feb 9, 2010 at 4:13 PM, Sebastien Nerig <overse...@hotmail.com>wrote: > Hi, > > I am trying to make a dynamic cube with osg. > The idea is to render into a cube map the +X, -X, +Y, -Y, +Z and -Z view > from the camera view point at each frame. > Then the cube map is textured on a reflector surface (a plane) within a > shader. I would like to see other objects (sphere, cube) reflecting in my > plane as it was a mirror. > I managed to make the cube map and to texture it on my plane but the > reflection is not correct, and I need some ideas to correct my app. > > Ok, so I build a cubemap texture with osg, then I create 6 camera nodes. > theses cameras are looking at +X, -X, +Y, -Y, +Z and -Z directions and are > attached with a callback to the main camera position. > I use this command to attach the cube map texture for each camera : > > Code: > camera->attach(osg::Camera::COLOR_BUFFER, m_textureEnvMap, 0, i); > > > > Then I use this fragment shader to map the cube map on the plane : > > Code: > // world space eye vector > vec3 E = normalize(posWorld.xyz - cameraPosWorld); > // plane world vector (hadcoding!) > vec3 N = vec3(0,1,0); > vec3 coord = reflect(E, N); > vec3 reflectColor = textureCube(cubeMap, vec3(coord.x, coord.y, > coord.z)).rgb; > > > > posWorld is the current fragment world position (posWorld = modelMatWorld * > gl_Vertex); cameraPosWorld is the camera world position (passed with > uniform). > > I would like to have some advice and ideas about my program. Did anyone > already try to make dynamic cube ? What did I miss ? > > Thank you! > > Cheers, > Sebastien > > ------------------ > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=23848#23848 > > > > > Attachments: > http://forum.openscenegraph.org//files/sans_titre_2_182.jpg > http://forum.openscenegraph.org//files/sans_titre_243.jpg > > > _______________________________________________ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >
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