I have used C++ and FLTK to write up a simple tcl script to C++ source code converter. The conversion is quite primitive, but it saves me a lot of time to learn VTK.
Here is my test version of vtktcl2cpp converter (binary in Windows):
Features currently supported:
Simple GUI or Command line processing (vtktcl2cpp [in.txt] [out.txt] [header.txt])
Generate header files
Comments are welcomed!