1. YGGDRASIL WORLD GENERATION A modular approach to procedural world generation

2. Features Highly flexible Semi predictable output Modular framework Automatic world update Step-by-step generation Random and prefabricated rooms High control over room layouts and spacing Three different graph generators Ensured connectivity Two different corridor generators

3. Generation Screenshots

4. Normal distribution

5. Generation Process Generation is split into modules Room and layout generator Node graph generator Node graph simplifier Corridor generator Grid conversion Wall generator Binary space partitioning Run in order, can require data from others External configuration files

6. Generation Process

7. Rooms and layout Prefabricated Rooms High variety and control Randomized Rooms Normal distribution Room Layout Circular algorithm Portals Connectivity between rooms One on each side

8. Rooms and layout

9. Node graph generators Connect the rooms Three algorithms Delaunay triangulation Gabriel graphs Relative neighborhood graphs Circles Greedy and expensive algorithms Problem: All nodes are checked Solution: Sort nodes on XY-axis

10. Node graph generators

11. Node graph simplifiers Minimum Spanning Tree (MST) Lowest edge cost Ensures node connectivity to graph Remove redundant edges Remove loops End with tree structure Greedy algorithms

12. Node graph simplifiers

13. Corridor generator Node graph for connectivity Either complete or simplified graph Portals Find closest between two rooms Various shapes L-shapes Straight lines Bresenham’s algorithm Width

14. Corridor generator

15. Grid conversion and walls Convert dungeon data to grid format Wasteful on memory Walls Line between void and non-void cells in grid Internal walls between corridors and rooms

16. Grid conversion and walls

17. Binary space partitioning Splits dungeon grid into smaller pieces Later usable for Render optimization Physics Artificial Intelligence General performance optimization

18. Step-by-step generation Generate in real time One frame = one step Three stage process Pre step Step Post step Highly useful Graphic representation of generation process Preloading next level No loading times!

19. Live demonstration Time for a live demonstration of Yggdrasil World Generation

20. Questions? Any questions about anything?