【PlayCanvas】スクリプトによるアニメーション制御 ・順再生・逆再生・ループ

/*jshint esversion: 6, asi: true, laxbreak: true*/

const Door = pc.createScript('door');

// initializeはスクリプトが有効になった際に１度呼び出される
Door.prototype.initialize = function () { 
    //アニメーション名を設定
    const ANIMATION_NAME = "open"

    // AnimationComponentの持っているplay関数を実行
    this.entity.animation.play(ANIMATION_NAME)
};

/*jshint esversion: 6, asi: true, laxbreak: true*/
const Door = pc.createScript('door');

/*
  エディタの値
    loop : false
    speed : 0.5
    アニメーション名: open
*/

Door.prototype.initialize = function () {
    this.ANIMATION_NAME = "open"  // アニメーション名を指定
};

Door.prototype.update = function () {
    const {duration, speed ,playing} = this.entity.animation
    // アニメーションが再生中ではなかったら
    if (!playing) {
        // 速度(speed)を0.5　→ -0.5 , -0.5 → 0.5に変更をする
        this.entity.animation.speed = -(speed)
        // blendTimeに速度(speed)がマイナスだったらdurationの値を指定する
        const blendTime = this.entity.animation.speed > 0 ? 0 : duration
        // アニメーションを再生
        this.entity.animation.play(this.ANIMATION_NAME, blendTime)
    }
}

/*jshint esversion: 6, asi: true, laxbreak: true*/

const Door = pc.createScript('door');
Door.attributes.add("player", { type: "entity" })

Door.prototype.initialize = function () {
    const ANIMATION_NAME = "open"
    const animation = this.entity.animation.getAnimation(ANIMATION_NAME)
    const duration = animation.duration
    this.isOpen = false
    this.timer = 0

    this.entity.on(`door:open`, () => {
        this.entity.rigidbody.enabled = false
        this.entity.animation.speed = 0.5
        this.entity.animation.play(ANIMATION_NAME)
        this.isOpen = true

    })
    this.entity.on(`door:close`, () => {
        this.entity.rigidbody.enabled = true
        this.entity.animation.speed = -0.5
        this.entity.animation.play(ANIMATION_NAME, duration)
        this.isOpen = false
    })

    this.entity.collision.on("collisionstart", (e) => {
        const { other } = e
        if (other.name === this.player.name && !this.isOpen) {
            this.entity.fire(`door:open`)
        }
    })
};

Door.prototype.update = function(deltaTime){
   if(!this.isOpen) return
   this.timer += deltaTime
   if (!this.entity.animation.playing && this.timer > 3) {
        this.entity.fire(`door:close`)
        this.timer = 0
    }
}