In this 10 mins GameDev tips we are going to explore Quaternions in an intuitive way. Don't expect deep math derivations. However after watching this video you should have a good mental picture on how they could help you dealing with rotations and orientations in your game projects. I will start by describing euler angles and their issues following by a visual example of how quaternions works (using blender). Then we are going to see different applications of them in C# using unity.

Quaternions on wikipedia: https://www.wikiwand.com/en/Quaternion

Complex numbers on wikipedia: https://www.wikiwand.com/en/Complex_n...

3BlueOneBrown Visualizing quaternions:    • Visualizing quaternions (4d numbers) ...  

Quaternions for computer graphics - J.Vince: https://www.amazon.com/Quaternions-Co...

Ken Joy lecture:    • Quaternions  

Unity Quaternions doc: https://docs.unity3d.com/ScriptRefere...

Godot Quaternions doc: https://docs.godotengine.org/en/stabl...