1. Object Oriented Design

2. Goals  Pacman Project Reflections  The Sims Project: additional pointers

3. Classes  Pacman  Ghost  Dot  Power pill  Maze  Fruit  Score

4. On state diagrams  Naming of states: much better!  Transitions u Need labels! u Labels = Event [Guard] / Action u If multiple objects are involved: event needs to describe  who is involved  what happens to whom  Describe Event not Method attacking fleeing eat Not clear who is involved Ghost states:

5. Ghost state diagram attacking fleeing fleeing blinking Returning to ghost home Pacman eats power pill Power Pill effect fades away (10 secs) Power Pill effect is gone (2 secs) Pacman eats ghost Ghost reaches home

6. Sequence diagrams  Keep general flow left to right u What makes the ghost go right? :Pacman:Ghost kill :Ghost:Pacman kill Ok, but not recommended Good

7. The Sims

8. Collaborative Diffusion Search  Can be used to build simulations including object interactions even more complex than that found in the Sims

9. Getting started  Look at existing AgentSheets projects u “Ultimate Pacman” u “World Cup”

10. Diffusion Difference Equations  Simple (k=0.25) u u := 0.25 * (u[left] + u[right] + u[up] + u[down])  General u u := @k * (u[left] + u[right] + u[up] + u[down] - 4 * u) + u u Where k is  The diffusion coefficient  Should be < 0.45

11. Debugging diffusion  3D Plot is only available in research prototype  Use colorization

12. Wanted  We need one person who would help building an infrastructure (counts as final project).  Who knows u Java and OpenGL u Java u OpenGL