The code contains an additional helper file shape (cpp, hpp) able to generate meshes from basic parametric primitives (plane, sphere, cylinder).

Each set of identifiant used to draw a shape are stored in the struct shape_gpu. Several shapes can be stored in a std::map and acccessed under a user defined name.

Model transformation are also send to vertex shader in order to set position and orientation. Note that before each drawing, the uniform parameters are setup.

Compile and execute the code, make sure you understand the new big steps and functions of this code.