Hello Swen, in the last few days i've figured out, that i have a bug in my multipass soluiton. For this bug, i've actually no idea how i could solve the problem....
The problem occurs with the execution of the passes. Each pass holds an osg::StateSet where the Shaders and textures are bound for execution. Actually this StateSet must be an element of the SceneGraph for execution. This is not the problem, if the Shader is an object refered shader like a dot3 Shader. But the dilemma is, that you don't have allways object refered shaders, sometimes the shader is not part of an object (Blur, HDR ect.), which will actually not be executed. The other problem of the dilemma occurs, if you got more shaders which are object refered (p.e. dot3, phong lighting). If you bind more than one state to the object, only the last state will be executed ... One Solution may be a render quad for each pass, which is executed (rendered) explicit outside the graph, to force the execution. But i don't have a solution how this could be realized... I think this could be a part of your issue. Are you sure, that your first shader is executed? Best regards, Christian Swen Walkowski wrote: > Hello all, > > first I am sorry that I start a new thread, but I do not have the old > mail here that I can answer it. That thread refer to: [osg-users] > Multipassshading in OSG v1.2 > > I done a look in the source code from Christian, with that code I > tried to extend my shader for a static 2 pass shader. > > That is the shader class is in the attachmend (Shader.cpp). > In the attachmend you will see the output (2Pass.JPG). > You just will see the the point (right upper corner) but not the live > video stream from the camera and the output from the discard shader. > > I try to use osgart. The first texture, who the constructor gets and > put it to the first shader pass is the live picture. What I get out of > that pass I try to put in the second pass and than display it. > > So maybe someone can help me! > > Thanks Swen > > ------------------------------------------------------------------------ > > _______________________________________________ > 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
