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Unreal Basics

Unreal Basics. CIS 488/588 Bruce R. Maxim UM-Dearborn. Resources. Unreal Development Kit The Buzz3D website http://www.3dbuzz.com UDK Game Development http://www.delmarlearning.com/companions/index.asp?isbn=1435460189 Unreal Developer Network website http://www.unrealengine.com/en/udk/.

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Unreal Basics

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  1. Unreal Basics CIS 488/588 Bruce R. Maxim UM-Dearborn

  2. Resources • Unreal Development Kit • The Buzz3D website http://www.3dbuzz.com • UDK Game Development http://www.delmarlearning.com/companions/index.asp?isbn=1435460189 • Unreal Developer Network website http://www.unrealengine.com/en/udk/

  3. UDK Engine • UDK is an open source version of the open-ended Unreal3 system that can be used for many real-time projects • Unreal is good for games, but has also been used for industrial visualization (e.g. interactive architectural flythrough)

  4. Unreal Components • Graphics Engine • Sound Engine • Physics Engine (Karma) • Input Manager • Network Infrastructure (client/server) • Kismet Visual Programing • UnrealScript Inteprerter • UnrealScript is object oriented with a syntax similar to C++

  5. Unreal Component Interaction Graphics Engine Sound Engine Engine Core Physics Engine UnrealScript Interpreter

  6. Unreal Game Loop Initialization Events Game Loop Start Fire Gun Play Sound Move Player … Check for Input Event Control Update

  7. Unreal Process - 1 • Game Initialization (starting UDK) • Core engine initializes all system components • Components begin to send info back to core for synchronization • Game ready for user input • Game Launch (starting a level) • Map is loaded with all its game assets and properties • Each asset’s info sent to Unreal component

  8. Unreal Process - 2 • Gameplay (artistic use of items) • Each component sends events and tasks to the message queue • Unreal game loop runs with highest priority message tasks performed first

  9. Game Assets - 1 Stored in packages (libraries). Each package type is stored in its own folder. • Textures packages (.utx) • Textures used to color object surfaces come from tools like Photoshop or Upaint, could come from digital photographs or scanner

  10. Game Assets - 2 • Sound packages • Unreal supports .wav files often created using programs like SoundForge, used for sound effects • Music Packages • Unreal supports .ogg files create by programs like Cakewalk

  11. Game Assets - 3 • Static mesh (.upk) • Highly optimized polygonal models from an external 3D package like Maya or 3ds max (you need the right plug-in to import them into Unreal), used for physical details, best to use multiple copies rather than different meshes (for performance)

  12. Game Assets - 4 • Animation package (.upk) • Store all animated assets (i.e. characters, vehicles, weapons), each elements has two component (texture model and animations) to allow mixing and reuse, created using Maya

  13. Game Assets - 5 • Map (.upk) • Not a package, a map is a collection of assets used to define a complete game level, created using UnrealEd • UCC • Unreal execution environment is a command-line program that allows low-level package editing and compilation of Unreal Script programs (.u)

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