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Object Oriented Design

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

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Object Oriented Design

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  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 • 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 Ghost states: attacking Not clear who is involved eat fleeing

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

  6. Sequence diagrams • Keep general flow left to right • What makes the ghost go right? :Pacman :Ghost :Ghost :Pacman kill 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 • “Ultimate Pacman” • “World Cup”

  10. 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

  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 • Java and OpenGL • Java • OpenGL

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