The intention of these “RCS Teaser” tutorials is to demonstrate the most key part of the code required for producing the given functionality, e.g., bending via vertex position transformations within the vertex shader as explained in the video tutorial below.

The missing fragment shader code, and C++ in the main.cpp file, are minimal, but in these early days it seemed to me a little premature to create what might turn out to be quite a long video, but fully functional programming tutorials of the teaser series will be added in due course.