Learn in the textbookApplications of 3D and Video Media
DefinitionA game (ゲーム) is a familiar use of 3D and CG for entertainment, redrawing the screen on the spot as the user plays.
ExplanationA 3D game stores characters and backgrounds as solid shape data, and each time it receives input it calculates how they look and displays them (real-time rendering, リアルタイム描画). Because the player's input decides the next frame, the same scene looks different for each person who plays it.
AnalogyUnlike a picture-card show that always runs in the same order, it is like a storyteller who draws the next picture on the spot when a listener says 'go right'.