Hello :) I've been messing around with glsl for a while now, at the moment I'm writing a "shader manager", everything seems quite trivial but then someone mentioned me that a program could have many 'shaders' attached, so I thought I should have a list for vertex and fragment shaders, per program. Would this be correct?. I don't understand why would this be required, so far I've only seen shaders that use 1 pair (vertex, fragment) and nothing else. Why would I need to support more shaders per program?, anyone care to explain me please?. The other day I was staring at some code someone wrote and they were actually doing what I mention, each 'shader' object (in their class) had the ability to store multiple frag and vert shaders. How is this any useful? What should the ideal 'shader manager' provide to the developer aside from an abstracted layer that handles the gl objects and shader loading?.

OK that's starting to make sense, but how would the shader lib manage this situation? (ie. it has tons of shaders, how is it going to know when or where to enable them? ). Mind you I'm a little retarded unless you draw me a picture I might not understand it fully :D

I'm just writing this high-level manager so I don't have to mess around with the low level stuff, it's really driving me crazy!

Is there any website or piece of code I could take a look at to fully understand the concept?

Thanks