Field-Based Navigation
for Real-Time Systems
Most navigation systems compute paths. Field-based navigation eliminates path computation entirely. The environment becomes the navigation structure.
What Is Field-Based Navigation?
Field-based navigation represents the environment as a persistent directional structure. Instead of calculating a path for each agent, the system builds a navigation field once. Agents follow the field — they don't solve paths.
The field encodes direction, cost, and flow. Every query reads from this structure in constant time, regardless of grid complexity or agent count.
How It Differs from A*
| Dimension | A* Pathfinding | Field-Based Navigation |
|---|---|---|
| Approach | Compute path per agent | Build field once, query forever |
| Goal change | Recompute from scratch | Query new direction instantly |
| Scaling | Cost grows with agents | Cost independent of agents |
| Multi-agent | Per-pair avoidance | Coordinated field movement |
| Architecture | Computation (disposable) | Infrastructure (persistent) |
Not an Improvement. A Replacement.
Field-based systems remove the need for per-agent pathfinding, repeated computation, and constant replanning. Navigation becomes a query. Performance becomes stable. Scaling becomes predictable.
Most systems try to optimize pathfinding. Field-based navigation removes the need for pathfinding entirely. This is a different class of system.