Ray casting

Ray casting is a computer graphics technique used to create a 3D effect on a 2D screen. It works by projecting imaginary lines (rays) from the viewer's eye or camera into the scene. Each ray checks what it hits first—like a wall or object—and then the program uses that information to determine what the viewer should see at that point, such as colors or textures. This method helps generate realistic images efficiently, commonly used in early 3D games and rendering applications to simulate depth and perspective.