A minimal working example of a trackball camera in OpenGL.
Note that the code is written in a way to prefer clarity in presentation over performance in the execution or good codding patterns. The implementation is based in the theory descibed in this article
- All the camera related code is encapsulated in a class.
- A single main file that shows how to use the class.
I tested the sample in an Ubuntu 18.04 standard installation. It also requires your graphics drivers already installed. And then, I installed all the libraries from the official repositories.
I provide a sample makefile that works on the environment described above. For other platforms or IDEs you can deduct what you need to do by reading it.