Large-Scale Search for The Witness Levels Nathan R. Sturtevant, - - PowerPoint PPT Presentation

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Sep 25, 2023 39 likes •383 views

Large-Scale Search for The Witness Levels Nathan R. Sturtevant, University of Denver Matheus Ota, State University of Campinas, Brazil DANIEL FELIX RITCHIE SCHOOL OF ENGINEERING & COMPUTER SCIENCE DANIEL FELIX RITCHIE SCHOOL OF

SLIDE 1 DANIEL FELIX RITCHIE SCHOOL OF ENGINEERING & COMPUTER SCIENCE

Large-Scale Search for The Witness Levels

Nathan R. Sturtevant, University of Denver Matheus Ota, State University of Campinas, Brazil

SLIDE 2 DANIEL FELIX RITCHIE SCHOOL OF ENGINEERING & COMPUTER SCIENCE

Large-Scale Search for The Witness Levels

Level Design

Significant work in games using AI for design
Browne, Isaksen, Jaffe, Nielson, A. Smith, G.

Smith, Togelius, Zook (& many others)

SLIDE 3 DANIEL FELIX RITCHIE SCHOOL OF ENGINEERING & COMPUTER SCIENCE

Large-Scale Search for The Witness Levels

Exhaustive Search

Suppose we can generate all content:
No longer a question of Content Generation
A question of Content Selection
How do we choose the best content?

SLIDE 4 DANIEL FELIX RITCHIE SCHOOL OF ENGINEERING & COMPUTER SCIENCE

Large-Scale Search for The Witness Levels

Previous Work: Fling!

Look for constraints that players learn
Select solutions that reward the players’

knowledge

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Constraint: Each level has 1 solution

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Constraint: Each level has 1 solution

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Constraint: Each level has 1 solution

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Constraint: Each level has 1 solution Result: Cannot take parallel moves

SLIDE 9 DANIEL FELIX RITCHIE SCHOOL OF ENGINEERING & COMPUTER SCIENCE

Large-Scale Search for The Witness Levels

New Project: The Witness

2016 game by Jonathan Blow / Thekla, Inc
Solve puzzles on deserted island

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Can we create new, compelling levels for the game?

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Design Strategy

Combine these puzzles… …with these.

SLIDE 12 DANIEL FELIX RITCHIE SCHOOL OF ENGINEERING & COMPUTER SCIENCE

Large-Scale Search for The Witness Levels

Design Philosophy

Select puzzles

SLIDE 13 DANIEL FELIX RITCHIE SCHOOL OF ENGINEERING & COMPUTER SCIENCE

Large-Scale Search for The Witness Levels

Design Philosophy

Select puzzles
Understand puzzles

SLIDE 14 DANIEL FELIX RITCHIE SCHOOL OF ENGINEERING & COMPUTER SCIENCE

Large-Scale Search for The Witness Levels

Design Philosophy

Select puzzles
Understand puzzles
Subvert puzzles

SLIDE 15 DANIEL FELIX RITCHIE SCHOOL OF ENGINEERING & COMPUTER SCIENCE

Large-Scale Search for The Witness Levels

Design Philosophy

Select puzzles
Understand puzzles
Subvert puzzles
Repeat

SLIDE 16 DANIEL FELIX RITCHIE SCHOOL OF ENGINEERING & COMPUTER SCIENCE

Large-Scale Search for The Witness Levels

Design Philosophy

Select puzzles
Understand puzzles
Subvert puzzles
Repeat

} Designer in the loop

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✘ ✔ ✔

SLIDE 25 DANIEL FELIX RITCHIE SCHOOL OF ENGINEERING & COMPUTER SCIENCE

Large-Scale Search for The Witness Levels

First iteration

Select puzzles
Understand puzzles
Problems:
First solution solves all 3 puzzles
2 puzzles taken alone have single solution

SLIDE 26 DANIEL FELIX RITCHIE SCHOOL OF ENGINEERING & COMPUTER SCIENCE

Large-Scale Search for The Witness Levels

Subvert

Reminiscent of secret sharing algorithms
Given any n-1 puzzles reveal as little information

about the final solution

Single joint solution
Find triples of puzzles where:
Every pair has many joint solutions
Taken together there is only one solution

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SLIDE 29 DANIEL FELIX RITCHIE SCHOOL OF ENGINEERING & COMPUTER SCIENCE

Large-Scale Search for The Witness Levels

Repeat

Select new puzzles
Understand
“Problems”
Simple heuristics lead to solutions

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SLIDE 32 DANIEL FELIX RITCHIE SCHOOL OF ENGINEERING & COMPUTER SCIENCE

Large-Scale Search for The Witness Levels

Subvert

Add new constraints
Break the heuristics that are learned

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Thanks!

See full sequence: http://movingai.com/witness.html