Thanks for sharing your ideas regarding expressing your custom drawing code as a data structure. I wanted to send you an email, but I can’t find your email address, so I’m just going to you use this comment box instead!

Anyway, your Cocoa Shaders blog post was very influential to me, and I implemented a similar system in Python. It suited my purpose, but I never did anything with shaders in Cocoa until I discovered the “TTStyle” code in Joe Hewitt’s Three20 library for the iPhone. He has implemented a shader system very similar to yours, except that it it expressed strictly as a linked list.

So while I was reading Joe’s shader code, I remembered what you said about building a tool to construct shader trees. Since one of the purposes of Three20’s shader system is to allow clients of the library to customize/theme its view components, I figured that this would be a perfect place for a more user-friendly tool to play around with the shader lists. And so I began building TTStyleBuilder (http://www.vimeo.com/5429347).

Anyway, I just wanted to show you what I built since your blog post was the inspiration.

Thanks! -keith http://www.thepolypeptides.com