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big-brain
is a Utility AI
library for games, built for the Bevy Game Engine
It lets you define complex, intricate AI behaviors for your entities based on
their perception of the world. Definitions are almost entirely data-driven,
using plain .ron
files, and you only need to program considerations
(entities that look at your game world), and actions (entities that perform
actual behaviors upon the world). No other code is needed for actual AI
behavior.
See the documentation for more details.
Example
First, you define actions and considerations, which are just plain old specs
Component
s and System
s.
Considerations
Consideration
s are entities that look at the world and evaluate into Utility
values.
use *;
use *;
Actions
Action
s are the actual things your entities will do.
Thinker Definition
Finally, you can use it when define the Thinker
:
// behavior.ron
(
picker: {"FirstToScore": (threshold: 80.0)},
otherwise: Some({"Meander": ()}),
choices: [(
consider: [{"Bladder": (weight: 3.0)}],
// Thinkers are infinitely nestable! They're actually Actions themselves.
then: {"Thinker": (
picker: {"FirstToScore": (threshold: 80.0)},
choices: [(
consider: [{"Bladder": (weight: 3.0)}],
then: {"Pee": ()}
)]
)}
), (
consider: [{"Thirst": (weight: 2.0)}],
then: {"Drink": ()},
), (
consider: [{"Hunger": (weight: 2.0)}],
then: {"Eat": ()},
)],
)
License
This project is licensed under the Parity License. Third-party contributions are licensed under Apache-2.0 and belong to their respective authors.
The Parity License is a copyleft license that, unlike the GPL family, allows you to license derivative and connected works under permissive licenses like MIT or Apache-2.0. It's free to use provided the work you do is freely available!
For proprietary use, please contact me, or just sponsor me on GitHub under the appropriate tier to acquire a proprietary-use license! This funding model helps me make my work sustainable and compensates me for the work it took to write this crate!