What is Utility AI?
Decision-making is the core of every AI system. Various methods exist for decision-making, such as Behavior Trees, Finite State Machines, etc. Among these, Utility AI is one of the most robust and powerful systems for decision-making in game programming. The core concept of Utility AI is that every decision of an agent is assigned a score (also known as utility). And the winner is the decision with the highest utility.
Here’s how the decision-making process of a Utility-Based AI works step by step:
- Evaluating decisions
- The AI character evaluates all decisions based on multiple factors like the enemy health, distance to target, available resources, etc.
- Assigning utilities for each decision
- Based on the evaluation, each decision is assigned a score representing its utility.
- This score reflects how “good” the decision is in the current context.
- Making the decision
- The decision with the highest utility score is chosen for the AI character to execute.
- This ensures the NPC prioritizes decisions that are most beneficial for the current situation.
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Created : March 31, 2024