You need render to texture to do what you want. See the FBOViewport class I posted a few weeks ago (It's a modification of Yvonne's excellent creation.)
It allows you to render to textures, both for color and depth. You can then take those textures and use them as input for a second pass which compose stuff to the visible framebuffer. (You need to set up several viewport for this, FBOViewports for texture targets and regular viewports for the final pass.) Such functionality is not covered by MultiPassMaterial. It only helps when you combine several materials with the GL blend function. Cheers, /Marcus Tiago Coelho skrev: > Hi, > I'm developing a splat renderer using glsl with opensg and i need to run > it in a cluster. > I need to have two passes, one to calculate visibility and depth values, > and another for shading. > the problem is in the middle, i don't know how to use the output from > one shader and make it an input in the second one. > > I found the MultiPassMaterial Class and saw an example using various > simple materials, but still lost... > > any help is very wellcome :) > > should i render the first pass depth values to the framebuffer (using > gl_FragColor) ? then how would i "redirect" that to a texture to be the > input of the second pass shader? > _________________________________ > Pedro Tiago Cruz Coelho > > > ------------------------------------------------------------------------ > > > ------------------------------------------------------------------------- > Using Tomcat but need to do more? Need to support web services, security? > Get stuff done quickly with pre-integrated technology to make your job easier > Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo > http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 > > > ------------------------------------------------------------------------ > > _______________________________________________ > Opensg-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/opensg-users ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Opensg-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/opensg-users
