如何在动画剪辑结束时使用 Javascript 触发 Aframe 动画混合器事件?

How to fire an Aframe animation-mixer event using Javascript when an animation-clip ends?

我最初使用 don mccurdy 的动画混合器在 .fbx 模型上播放动画。我想要实现的是,只要当前播放的动画结束,就会触发一个事件,使 'Play again' 按钮可见。当我点击这个按钮时,动画又开始播放了。

但是事件按钮在动画开始播放后立即可见,而不是在事件 'animation-finished' 触发后可见。

代码:

<html>
    <head>
        <meta charset="utf-8">
        <script src="https://aframe.io/releases/0.8.0/aframe.min.js"></script>
        <script src="https://rawgit.com/donmccurdy/aframe-extras/master/dist/aframe-extras.loaders.min.js"></script>
        <script src="inflate.min.js"></script>
    </head>
    <body>
        <a-scene>
        <a-sky color="#6EBAA7"></a-sky> 
            <a-entity id="animationPlayer" scale="0.012 0.012 0.012" fbx-model="src: kick.fbx" animation-mixer="clip: *;loop: repeat; repetitions: 2;"></a-entity>
            <a-entity position="0 1.5 3.5"><a-camera></a-camera></a-entity>
            <a-box id="play_again" position="0 3 -1" height=0.5 depth=0.09 visible="false" color="red"></a-box>
            <a-text value="Play again" position="-0.53 3 -0.95"></a-text>
        </a-scene>
        <script>
            document.querySelector("#animationPlayer").addEventListener('animation-finished',function(){
                document.querySelector("#play_again").setAttribute('visible', 'true')
            });
        </script>
    </body>
</html>

所以,我是在语法上遗漏了什么还是存在逻辑问题?

我假设问题如下 按钮是可见的,模型是动画的,单击按钮时按钮是隐藏的。当动画完成时,返回按钮并重置动画。

let button = document.querySelector("#play_again");
let player = document.querySelector("#animationPlayer");
button.addEventListener('click',function(){
  //hide the button
  button.setAttribute('visible','false');

  //add the event listener to handle post animation before starting animations 
  (use once to help with cleanup)
  player.addEventListener('animation-finished',function() {
    button.setAttribute('visible','true');
    player.removeAttribute('animation-mixer');
  },{once:true});

  //start the animation by appending the animation-mixer
  player.addAttribute('animation-mixer',{clip: "*",loop: "repeat", repetitions: 2});
});

从开始的html中移除animation=-mixer

<a-entity id="animationPlayer" scale="0.012 0.012 0.012" fbx-model="src: kick.fbx"></a-entity>