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Home / Proceedings / Proceedings of the AAAI Conference on Artificial Intelligence and Interactive Digital Entertainment

Ultra-Fast Optimal Pathfinding without Runtime Search

February 1, 2023

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Authors

Adi Botea

NICTA and The Australian National University


DOI:

10.1609/aiide.v7i1.12443


Abstract:

Pathfinding is important in many applications, including games, robotics and GPS itinerary planning. In games, most pathfinding methods rely on runtime search. Despite numerous enhancements introduced in recent years, runtime search has the disadvantage that, in bad cases, most parts of a map need to be explored, causing a time performance degradation. In this work we explore a significantly different approach to pathfinding, eliminating the need for runtime search. Optimal paths between all pairs of locations are pre-computed. Since straightforward ways to store pre-computed paths are prohibitively expensive even for maps of moderate size, pre-computed data are compressed, reducing the memory requirements dramatically. At runtime, pathfinding is very fast, as it requires visiting only the locations on an optimal path. In each location, a quick computation provides the next move along the optimal path. We demonstrate the effectiveness of this approach on Baldur's Gate game maps. The compression factor reaches two orders of magnitude, bringing the memory requirements down to reasonable values. Compared to A* search, the runtime speedup reaches and even exceeds two orders of magnitude. When averaged over paths of similar cost, the speedup reaches a value of 700 in our experiments.

Topics: AIIDE

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HOW TO CITE:

Adi Botea Ultra-Fast Optimal Pathfinding without Runtime Search Proceedings of the AAAI Conference on Artificial Intelligence and Interactive Digital Entertainment (2011) 122-127.

Adi Botea Ultra-Fast Optimal Pathfinding without Runtime Search AIIDE 2011, 122-127.

Adi Botea (2011). Ultra-Fast Optimal Pathfinding without Runtime Search. Proceedings of the AAAI Conference on Artificial Intelligence and Interactive Digital Entertainment, 122-127.

Adi Botea. Ultra-Fast Optimal Pathfinding without Runtime Search. Proceedings of the AAAI Conference on Artificial Intelligence and Interactive Digital Entertainment 2011 p.122-127.

Adi Botea. 2011. Ultra-Fast Optimal Pathfinding without Runtime Search. "Proceedings of the AAAI Conference on Artificial Intelligence and Interactive Digital Entertainment". 122-127.

Adi Botea. (2011) "Ultra-Fast Optimal Pathfinding without Runtime Search", Proceedings of the AAAI Conference on Artificial Intelligence and Interactive Digital Entertainment, p.122-127

Adi Botea, "Ultra-Fast Optimal Pathfinding without Runtime Search", AIIDE, p.122-127, 2011.

Adi Botea. "Ultra-Fast Optimal Pathfinding without Runtime Search". Proceedings of the AAAI Conference on Artificial Intelligence and Interactive Digital Entertainment, 2011, p.122-127.

Adi Botea. "Ultra-Fast Optimal Pathfinding without Runtime Search". Proceedings of the AAAI Conference on Artificial Intelligence and Interactive Digital Entertainment, (2011): 122-127.

Adi Botea. Ultra-Fast Optimal Pathfinding without Runtime Search. AIIDE[Internet]. 2011[cited 2023]; 122-127.


ISSN: 2334-0924


Published by AAAI Press, Palo Alto, California USA
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