Object Oriented Design

Goals  Examples of GL4Java: what can be done with OpenGL?  Forming groups: u Outline project u Formulate requirement for Game Engine team

Checkpoint: does GL4Java run?  Can you run the example in the browser?  This is an important precondition for the next step: modify an example and get it to work (compile)

GL4Java Examples  NeHe Productions examples translated to GL4Java by Hodglin u More example in GL4Java: ehe/nehe.shtml ehe/nehe.shtml u More NeHe (but not in Java):  Ron

Forming groups  Taming the blob: Step 1 u requirement analysis u Develop game concept  Pick partners for final project  Present game concept to class

Let’s make a Game Engine  Refactoring u Bottom up: to make OpenGL functionality available u Top down: to capture needs by a variety of games  We use some ideas from our 2D editor design Hardware OpenGL Game Engine Chris Schenk & Luke Swanson Game 1Game 2 Game n

Game Proposal Document  Select Genre: Adventure, action, role-playing, strategy, simulation, sports, fighting, casual, god, educational, puzzle, online, …  High Concept: one or two sentences what your game is about  Game Play: what will the player do when playing the game? Contextualize with genre.What is the objective of your game?  Technology: u 2D: sprites u 3D: 3d agents Source: Game Design, Bob Gates

Requirement for Game engine  Camera aimed at character  Shapes  Aggregate shapes  Rotation of shapes and camera  Collision detection IIII  Multiple cameras  Clipping  Physics II  Particles  Text  Infinite backgrounds (repetitive textures, sky domes, …)  Foreground/messages/score keeping

Design  Create storyboards u Crude pictures of your game describing player / game interaction u Describe sequence: what leads to what? u What does the user see and control?  One character  First person  Birds eye  Many characters  List requirements for game engine

Homework  PROGRAMMING: u Modify “glutplane.java” to feature 20 planes u Compile and run u Due: November 7  PROJECT: u Finish game proposal document u to Alex & Andri u Due: November 12  READING: u OpenGL Red book chapter 3; Viewing u u Due: November 12