The qbColor class, defined in qbColor.h and qbColor.cpp provides a simple demonstration of how to implement the conversion from RGB to HSV and back to RGB.
The code in CApp.h and CApp.cpp provides a demonstration of the use of this class and is written to use the SDL2 library to display results in a window. Note that the SDL2 library is not included here, so you will have to download and install that yourself for your particular platform if you don't already have it.
The demonstration creates a spectrum display in the window, with hue varying across the horizontal axis and value across the vertical axis. The value is then animated repeatedly from 1.0 to 0.0 over 100 frames. The frame-rate will depend on your system.
A makefile has been provided to support building the code using GMake.
This code corresponds specifically to the two-part series on colour space conversion on the QuantitativeBytes YouTube channel, which can be found here:
(Episode 1 - HSV to RGB) https://youtu.be/hW4gZ4tGwds
(Episode 2 - RGB TO HSV) https://youtu.be/I8i0W8ve-JI
The QuantitativeBytes YouTube channel can be found here: www.youtube.com/c/QuantitativeBytes
As the code corresponds to specific videos, pull requests will not be accepted.