YGGDRASIL WORLD GENERATIONA modular approach to procedural world generation

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

Generation Screenshots

Normal distribution

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

Generation Process

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

Rooms and layout

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

Node graph generators

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

Node graph simplifiers

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

Corridor generator

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

Grid conversion and walls

Binary space partitioning • Splits dungeon grid into smaller pieces• Later usable for

• Render optimization • Physics• Artificial Intelligence• General performance

optimization

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!

Live demonstration

Time for a live demonstration of

Yggdrasil World Generation

Questions?

Any questions about anything?