A feature that has been requested the most over the past few months is the code generator. I have personally received several emails from VTK Designer 2 users asking about the code generator that existed in the 1.x series but has magically disappeared in the 2.x series. Since then we invested some efforts in getting the code generator design right. All the wrong design choices in the first code generator (written for 1.x) were discarded and a new design was engineered from scratch.
Adithya, an Intern at our company, and I set out on this task. Over the past 2 months the code generator has taken good shape. The CodeGenerator is implemented as a whole new component (thanks very much to GCF). It hooks into exposed interfaces from the canvas and visualization network components of VTK Designer and uses hints provided by nodes and connections to automatically generate the code. We still dont have the whole thing ready, but the results are showing up.
There is still a lot of work left, which I am sure Adithya will complete by the time his internship gets over at VCL. Right now we are only concentrating on a simple VTK/C++ code generator; however we have plans to provide Python and a pure OpenGL code generator as well.