1. three Realism
2. visual sensor types
3. clipping
4. visibility determination
5. shadow
6. ray casting
7. Brep/CSG/OCTree
8. diffuse/specular reflection
9. two types of curve
10. physically-based simulation
11. particle system
12. morphing/deformation
13. ray tracing/intersection
14. wing-edge
15. realism vs real-time
16. OpenGL capabilities
17. affine transformation
18. RGB system
19. two-buffer
20. key frame
    1. take the name from the traditional hierarchical production sysytem
       1. artists design or choreogaph a discrete key frames
       2. painters produces "in between" frames
    2. using computer to do painter's work
    3. two types of keyframing
       1. shape interpolation
          1. adding extra-key points if the corresponding keyframes do not have the same number of key points
          2. linear interpolation: Position(t)=(1-t)Position(i)+tPosition(i+1)
       2. parametric keyframe animation
21. projection principle
22. B-spline 基本性质证明
23. BSP tree application