Question about new AI module

[Quillraven]

Hi,

I have a question about the new AI module. I tried to add it to my project and replace the file approach. I think, that way I can avoid certain reflection stuff and the game would then run in the browser using TeaVM.

However, I am not 100% sure how to translate my tree to the KTX DSL when it comes to conditions.

I have following file:

# Actions
import attack:"com.github.quillraven.mysticwoods.behavior.slime.AttackTask"
import move:"com.github.quillraven.mysticwoods.behavior.slime.MoveTask"
import wander:"com.github.quillraven.mysticwoods.behavior.slime.WanderTask"
import idle:"com.github.quillraven.mysticwoods.behavior.slime.IdleTask"

# Conditions
import isEnemyNearby?:"com.github.quillraven.mysticwoods.behavior.IsEnemyNearby"
import canAttack?:"com.github.quillraven.mysticwoods.behavior.CanAttack"

subtree name:"attack"
  sequence
    (isEnemyNearby?) (canAttack? range:1.0) attack
    wait seconds:"uniform,1.25,2.1"

subtree name:"move"
  sequence
    (isEnemyNearby?) move range:2.0

root
  selector
    $attack
    $move
    (random success:0.25) idle duration:"uniform,2.0,3.5"
    wander range:6.0

I tried to translate it to the following:

behaviorTree<AIEntity> {
    `object` = AIEntity(entity, this@onAdd, inject("GameStage"))

    selector {
        sequence {
            guard = semaphoreGuard {
                add(IsEnemyNearby())
                add(CanAttack(range = 1f))
            }
            add(AttackTask())
            waitLeaf(UniformFloatDistribution(1.25f, 2.1f))
        }

        sequence {
            guard = dynamicGuardSelector {
                add(IsEnemyNearby())
            }

            add(MoveTask(2f))
        }

        sequence {
            random(ConstantFloatDistribution(0.25f))
            add(IdleTask(UniformFloatDistribution(2f, 3.5f)))
        }

        add(WanderTask(6f))
    }
}

The guard stuff does not compile. How do I provide the conditions? Or how would you translate my example file?

[Quillraven]

I debugged the tree when loading it from the file and this gave me a clue how to use the DSL:

behaviorTree {
    `object` = AIEntity(entity, this@onAdd, inject("GameStage"))

    selector {
        sequence {
            guard = GdxAiSequence(IsEnemyNearby(), CanAttack(range = 1f))
            add(AttackTask())
            waitLeaf(UniformFloatDistribution(1.25f, 2.1f))
        }

        sequence {
            guard = GdxAiSequence(IsEnemyNearby())
            add(MoveTask(2f))
        }

        sequence {
            guard = GdxAiRandom(ConstantFloatDistribution(0.25f))
            add(IdleTask(UniformFloatDistribution(2f, 3.5f)))
        }

        add(WanderTask(6f))
    }
}

Interestingly enough the guards of the attack and move sequence are not showing up as guards in the tree when loading from the file. Don't know why to be honest.

Anyway, everything seems to work now! One thing: would be nice if we can use 2f..3.5f or other typical kotlin syntax for the different Distribution classes.

[czyzby]

Glad you worked it out. :)

[Quillraven]

Also works now in the browser with TeaVM: https://quillraven.github.io/MysticWoods/

Amazing stuff! :)