state(initialState: string , stateList?: string[] ): StateComp

Finite state machine.

paraminitialState- The initial state.

paramstateList- The list of states.

const enemy = add([
    pos(80, 100),
    sprite("robot"),
    state("idle", ["idle", "attack", "move"]),
])

// this callback will run once when enters "attack" state
enemy.onStateEnter("attack", () => {
    // enter "idle" state when the attack animation ends
    enemy.play("attackAnim", {
        // any additional arguments will be passed into the onStateEnter() callback
        onEnd: () => enemy.enterState("idle", rand(1, 3)),
    })
    checkHit(enemy, player)
})

// this will run once when enters "idle" state
enemy.onStateEnter("idle", (time) => {
    enemy.play("idleAnim")
    wait(time, () => enemy.enterState("move"))
})

// this will run every frame when current state is "move"
enemy.onStateUpdate("move", () => {
    enemy.follow(player)
    if (enemy.pos.dist(player.pos) < 16) {
        enemy.enterState("attack")
    }
})

returnsThe state comp.

sincev2000.1

groupComponents

state(initialState: string , stateList: string[] , transitions: Record ): StateComp

state() with pre-defined transitions.

paraminitialState- The initial state.

paramstateList- The list of states.

paramtransitions- The transitions between states.

const enemy = add([
    pos(80, 100),
    sprite("robot"),
    state("idle", ["idle", "attack", "move"], {
        "idle": "attack",
        "attack": "move",
        "move": [ "idle", "attack" ],
    }),
])

// this callback will only run once when enter "attack" state from "idle"
enemy.onStateTransition("idle", "attack", () => {
    checkHit(enemy, player)
})

returnsThe state comp.

sincev2000.2

groupComponents