The document outlines the architecture of a game engine, detailing its main classes such as view controller, scene manager, and nodes for rendering. It covers various components including resources like textures and sounds, and explains the roles of different nodes (e.g., buffer, sprite, camera) in the rendering pipeline. Additionally, it mentions game-related features like physics simulation and monetization strategies.

1. GAME ENGINE ARCHITECTURE

3. MAIN CLASSES

4. VIEW CONTROLLER,
VIEW
• Update loop
• Render loop
• Events

5. SCENE MANAGER
• Called on update and
render cycles
• Swaps scenes
• Handles events

6. SCENE
• Content into scenes
• Nodes to be rendered
• Per-frame processing

7. NODE
• Basic elements
• Tree hierarchy
• Applies selected properties
from its parent

8. RESOURCES

9. TEXTURES
• Graphical data
• Avoid multiple memory
usage
• Preloading

10. FONTS
• Image, or
• Pre-generated bitmap
from vector font

11. SOUNDS
• Short sound effects
• Instant play
• Simultaneous play
• Uncompressed data
• Preloading

12. SHADERS
• Programs for GPUs
• Visual effects
• Less CPU usage

13. MATERIALS
• Lighting properties
• Shader Program selection
• Used by Buffer Nodes

14. VERTEX AND INDEX
BUFFER
• Vertex data
• Index data
• Points, lines, or triangles
• Owned by Buffer Nodes

15. NODES

16. BUFFER NODE
• Draws aVertex Buffer
• Index Buffer is optional

17. SPRITE NODE
• Textured sprite
• Rectangular 2D image
• Clipping

18. LABEL NODE
• Draws a string
• Uses Font resource
• Align modes
• Word-wrap
• Clipping

19. EMITTER NODE
• Particle systems
• Visual effects
• Own coordinate-system
• Source of particles

20. CAMERA NODE
• Represents the viewer’s
point of view
• Used by the Render
Pipeline

21. LIGHT NODE
• Ambient, directional, point
source
• Lighting is enabled by the
used Material
• Limited count

22. SOUND NODE
• Plays a sound
• 3D or stereo sound effect
by its position
• Attach to graphical
representation

23. MUSIC NODE
• Plays the background music
• Single
• Compressed data
• Buffered play
• Looping

24. RENDER PIPELINE

25. RENDER PIPELINE
• Executed on render cycle
• For the presented scene
• Single or multiple steps

26. RENDER STEP
• Selects destination buffer
• Specifies root source node
(generally the scene)
• Uses a camera for the point
of view

27. OTHER COMPONENTS

28. GAME RELATED
• 2D or 3D physics simulation
• Game Center or similar gaming network

29. MONETIZATION,
MEDIA
• In-app purchases
• Advertising
• Social media interactions

30. by
Attila Jenei
!
http://www.attilajenei.com
Game Engine Architecture