AI

If you need to use your own AI you just need to implement IAIActionResolver and bind your class to this type in GameGlobalsInstaller (more about dependency injection here).

Osnowa uses utility-based AI configured via assets (ScriptableObjects). You can find them in Assets/GameAssets/AI folder.

Activities, Skills, Conditions and utility evaluation

Activity is an object representing a task that an actor is occupied with at the moment. Each time a turn is given to an actor, it uses his current activity to generate a GameAction that the actor will perform. Some activities can consist of others. For example RoamActivityCreator will create a SequenceActivity which consists of WaitActivitys (just standing in place) and GoToActivitys (navigating the actor to random places in his vicinity).

Each actor has a component with a list of Skills defining what kinds of activities he can take. Each skill has a SkillEvaluator, a list of Conditions and an ActivityCreator.

• SkillEvaluator returns the utility score (0.0-1.0 number) of given skill basing on context.
• When an actor needs to decide what action he should take, AiActionResolver orders UtilityAi to go through all of the skills he has, choose the ones which conditions are satisfied, run their evaluators and choose the skill that had the highest score. * Then, the ActivityCreator is used to create an activity that will be assigned to the actor.

For example skills like Roam should have low utility score and skills like RunAwayFromEnemy should have high score but they also should have Conditions which would make sure that the entity is in danger.

Some skills also define Stimuli which are kind of event triggers — but this mechanic is a work-in-progress currently.