Object Oriented Design

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Object Oriented Design
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Goals

• Space Invaders Design presentations
• UML
• Use Case Diagrams
• State Diagrams
• Homework 3 announcement
• Game Design TidBits

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Diagrams

• Structural Diagrams (represent static application
  structure)
• Class Diagram (examples)
• Object Diagram (examples)
• Component Diagram
• Deployment Diagram
• Behavior Diagrams (represent different aspects of
  dynamic behavior)
• Use Case Diagram (examples)
• Sequence Diagram (examples)
• Activity Diagram
• Collaboration Diagram
• Statechart Diagram (example)
• Model Management Diagrams (ways you can organize
  and manage your application modules)
• Packages
• Subsystems
• Models

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Use Case Diagrams
Control Frog
player

• Contain
• Actors represent users of a system including
  human users and other systems
• Use cases represent functionality or services
  provided by a system to users
• Use cases are typically specified by sequence
  diagrams

fire laser
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Example
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Scenarios

• A scenario describes a single interaction between
  a user and a system as a sequence diagram
• Even a simple game (e.g., Frogger) requires a
  number of scenarios

frog
Move up
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State Diagrams
Same as general computer science state diagrams
but include hierarchical states
Event Guard / Action
Initial state
Final state
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Example 1
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Example 2 score keeper
inc
inc
inc
inc
inc
inc
inc
inc
inc
0
1
2
3
4
5
6
7
8
9
Inc seeA (lt-, digit) / make (lt-, inc)
Inc NOT (seeA (lt-, digit)) / new (lt-, 1)
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Homework

• Complete group design of Space Invaders
  INDIVIDUALLY including
• Class diagram
• Behavior Diagrams Sequence diagrams, State
  charts, Use cases
• Implement group design of Space Invaders in
  AgentSheets INDIVIDUALLY
• Game needs to be complete and playable including
  score keeping
• Turn in
• Electronic AND printed version of design (UML
  compliant)
• AgentSheets Project folder (zipped or stuffed)
• One paragraph on how to use your game
• Key bindings
• Worksheets to load
• Due Sept. 17

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About homework

• Project naming use last name as prefix for
• Project folder name Smith_Frogger
• Zipped/stuffed file Smith_Frogger.zip /
  Smith_Frogger.sit
• Documentation
• Separate file (separate email attachment)
• Format MS PowerPoint .ppt, or Adobe PDF .pdf
• Last name prefix Smith.ppt

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Emailing projects

• AS Windows / E-Mail Project
• Edit subject line to include 4448,
• e.g., 4448 My AgentSheets Simulation
  Smith_Frogger
• Send project ALSO to TA

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Structure of document

• UML compliant diagrams
• 1) class diagram (all classes, attributes and
  operations)
• 2) object diagram gt screen dump
• 3) Use Case Diagrams
• Scenario 1 user fires laser (show sequence
  diagram)
• Scenario n user
• 4) State Diagrams (where needed)