【Game Engine Architecture 11】
1、three most-common techniques used in modern game engines.
1）Cel Animation
2）Rigid Hierarchical Animation
3）Per-Vertex Animation and Morph Targets
2、Cel Animation
The precursor to all game animation techniques is known as traditional animation, or hand-drawn animation. This is the technique used in the earliest animated cartoons.
Cel animation is a specific type of traditional animation. A cel is a transparent sheet of plastic on which images can be painted or drawn.
The electronic equivalent to cel animation is a technology known as sprite animation.
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原文：https://www.cnblogs.com/tekkaman/p/10696223.html