Object Oriented Design

Goals

Pacman Project Reflections The Sims Project: additional pointers

Classes

Pacman Ghost Dot Power pill Maze Fruit Score

On state diagrams Naming of states: much better! Transitions

Need labels! Labels = Event [Guard] / Action 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:

Ghost state diagram

attacking

fleeingfleeing 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

Pac

man

eat

s gh

ost

Ghost reaches home

Sequence diagrams Keep general flow left to right

What makes the ghost go right?:Pacman :Ghost

kill

:Ghost :Pacman

kill

Ok, but not recommended

Good

The Sims

Collaborative Diffusion Search

Can be used to build simulations including object interactions even more complex than that found in the Sims

Getting started

Look at existing AgentSheets projects “Ultimate Pacman” “World Cup”

Diffusion Difference Equations

Simple (k=0.25) u := 0.25 * (u[left] + u[right] + u[up] + u[down])

General u := @k * (u[left] + u[right] + u[up] + u[down] - 4 * u) + u Where k is

The diffusion coefficient Should be < 0.45

Debugging diffusion

3D Plot is only available in research prototype

Use colorization

Wanted

We need one person who would help building an infrastructure (counts as final project).

Who knows Java and OpenGL Java OpenGL