The short answer 2D transformation uses a 3×3 matrix. 3D transformation uses a 4×4 matrix instead. Both rely on one added coordinate. So a 2D point becomes (x, y, 1). A 3D point becomes (x, y, z, 1). That extra…
The short answer Gouraud vs Phong Shading comes down to one choice: what gets interpolated, and where lighting gets evaluated. Both are interpolation schemes for shading a polygon smoothly. Neither one is a lighting model by itself. Gouraud shading evaluates…
The short answer Z-buffer vs painter’s algorithm is about where the visibility decision happens. The painter’s algorithm sorts every polygon by depth. Then it paints them back to front, so nearer surfaces cover farther ones. That sort costs work, and…
The short answer Raster scan vs random scan is about where the beam goes and what gets stored. A raster scan display sweeps every scan line, top to bottom. It stores an intensity value for every pixel in a frame…
The short answer Cohen-Sutherland vs Liang-Barsky comes down to how each one decides what to keep. Initially, Cohen-Sutherland tags every endpoint with a 4-bit region code. It then runs a bitwise check for a fast accept or reject. When a…
The short answer Flood fill vs boundary fill comes down to what each one checks. Boundary fill paints outward from a seed pixel until it hits a boundary colour. So it can fill a region whose interior has several different…
The short answer Overall, DDA vs Bresenham comes down to one thing: how each finds the next pixel. DDA uses floating-point maths, while Bresenham uses only integers. DDA computes an increment, then adds it and rounds at every step. Instead,…
Viewport vs Window in Computer Graphics is one of the most foundational concepts in rendering — and one of the most frequently confused, because “window” in graphics means something completely different from an OS window, and “viewport” in CSS means…
The short answer Viewports and viewing transformations work together to put a scene on screen. A window is a rectangle chosen in world coordinates that picks what part of the scene to show. A viewport is a rectangle on the…
