The Phong shading technique is build on a basis of relatively simple mathematics. In the following pictures you can see a demonstration what Phong shading can look like.
# Getting the Project ready
git clone https://github.com/MrDiver/ShadingExperiments-Raylib.git
cd ShadingExperiments-Raylib
mkdir build
cmake ..
make
# Running the project
./dist/rlProgram