Hi Carsten, Nice to hear from you again.
>> I have written a Stage that is ... > hmm, typically the children of a stage are considered to contribute to > whatever the stage produces. That "product" is then used elsewhere in the > scene. Yes >> Can you require new enough OpenGL so that you have access to layout(location >> = N) specifiers in your GLSL - in that case you would not need a uniform. Yes, I could and thought about it, but I want to be as general as I can. Apart from that, I want to use the same style as in other places. If I am going to get it working the way I intended, I will be more comfortable with the Stage concept. Therefore, it is also subject of learning. >> - Do I have access to the active Shader, i.e. the ShaderProgramChunk? > I think that depends, where do you want access to it. > The stage typically does not have access to shaders of its children, > because they can use widely different materials if they want to. Yes, that is an important observation. Actually, I have a subset of geometry that should take the Stage result texture as input. Other materials should just ignore it. > To me this sounds largely like the task of rendering some (sub)-scene into a > texture > and then using that on an object. > I'm pretty sure we have an example for that and you've probably seen it ;) > Perhaps I'm missing something why your case is fundamentally different? I will investigate... >> - Can I assemble program fragments in the Stage render function, i.e. >> can I inject shader code from the Stage class render function? > I *believe* OpenSG mimics OpenGL behavior here, i.e. you can have multiple > fragment > shader objects linked into a program object so long you ensure that there is > exactly one > main() function in the combined fragment shader objects. That would be great for assembling shader programs. I will have to read the OpenGL specs to get comfortable with that too. Best, Johannes ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Opensg-users mailing list Opensg-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/opensg-users
