Q6Computer Graphics and Multimedia
Question
4 marks
Describe the different types of animation techniques.
Answer
Animation techniques include traditional frame-by-frame, keyframe, procedural, physics-based, and motion capture methods.
Computer animation encompasses various techniques to create the illusion of motion for 2D and 3D objects:
- Traditional (Cel) Animation: Hand-drawn frames in sequence; digitized for computer processing. Labor-intensive.
- Keyframe Animation: Animator specifies key poses at specific time points (keyframes); computer interpolates (tweens) between them using linear, cubic, or spline interpolation.
- Procedural Animation: Motion defined by mathematical algorithms and rules (e.g., particle systems for rain, fire; flocking algorithms for crowds).
- Physics-Based Simulation: Rigid body dynamics, soft body dynamics, cloth simulation, fluid dynamics — realistic physical behavior computed by simulation.
- Motion Capture (MoCap): Real human/animal motion is recorded using sensors/cameras and applied to 3D characters. Used in film (Avatar) and games.
- Morphing: Gradually transforming one shape into another by interpolating vertex positions.
- Skeletal/Rigging Animation: 3D mesh deformed by an underlying skeleton (bones/joints) — standard in character animation.
- Forward and Inverse Kinematics (FK/IK): FK sets joint angles explicitly; IK computes joint angles given end-effector position.