This is a c-api wrapper for imnodes (https://github.com/rokups/ImNodes) which is a node editor for Dear ImGui (https://github.com/ocornut/imgui)
ImNodes is a submodule of this repo. To do generation again in case ImNodes is changed, you should update ImNodes, make sure that cimgui repository is a sibling folder to this repository folder and execute generator/generator.bat(.sh)