Building a 3D game engine involves creating a framework that handles rendering, input, physics, and asset management so developers can focus on game logic rather than low-level details. Popular engines like Unity and Godot provide ready-made solutions, but creating your own with C++ and OpenGL offers deep control and understanding of graphics pipelines.

A 3D engine typically includes:

• Rendering System – Uses APIs like OpenGL to draw 3D models, apply shaders, and manage lighting.

• Scene Graph – Organizes objects hierarchically for transformations and rendering.

• Camera System – Controls the viewpoint and projection.

• Input Handling – Captures keyboard, mouse, or controller events.

• Physics & Collision – Simulates movement and interactions.

• Resource Management – Loads and manages textures, models, and sounds.

Example: Initializing a Basic OpenGL Window in C++