005.) Camera Pt.1 - Simple Walking Camera - OpenGL 4 - Tutorials - Megabyte Softworks
OpenGL Camera Class - YouTube
OpenGL/C++ 3D Tutorial 39 - Camera class (PART 1) - YouTube
opengl - Difference and interaction between Viewport and Camera - Game Development Stack Exchange
OpenGL Camera 2d with zoom and rotation | David Amador
GitHub - CarloNicolini/OpenGL-CameraCalibration: A C++ class to help computation of OpenGL projection and modelview matrices starting from points 2D-3D correspondencies