1. Game Development Animation
Yingcai Xiao

2. Video Game
Interactive animation: user-> interface (look) -> action (feel) -> feedback (A/V, haptic)

3. Animation Animation: any change that has a visual effect.
Motion Dynamics: movements (geometry change)
Update Dynamics: attribute change (color, texture, …)
Others: camera position, lighting, rendering techniques, …

4. Key-frame Animation Defining key-frames
Inbetweening with interpolations:
Lerping (linear interpolation)
parabola interpolation

5. Key-frame Animation

6. Neighborhood skeletons: define interpolated shapes

7. Graphical languages P-curves (parametric representation of motion)

8. Animation Control
Explicit: animator provides a description of everything that occurs in the animation.
Tracking live action.
Procedural: movement computed by a procedure.
Actors (Object-oriented high-level procedural control)
Kinematics: positions and velocities of points.
Dynamics: physical laws that govern kinematics.
Physically based: cloth draping, plastics bending, …
Constraint-based: constraint movements.

9. Double Buffering Why? To reduce flickering How?
Draw to the invisible back buffer
Copy to the visible front buffer. (Btblt)==>very fast with HW assistance

10. Double Buffering – SRGP Pseudo Code
void Draw() {
SRGP_useCanvas(bbfr);
DrawObjects();
SRGP_useCanvas(SCREEN_CANVAS);
SRGP_copyPixel(bbfr, rect, pnt); }

11. Animation in Unity3D
Key-frame animation