我的 three.js 脚本没有在框架上运行

Question

我正在尝试使光线投射器仅在实体可见时起作用。我被告知要尝试编写一个脚本以使其正常工作，所以我继续这样做。 所有实体和子实体，我都可以通过点击进行交互，并且我的大部分事件都是通过点击触发的，这使得某些实体变得不可见：

<script id="city" type="text/html">
      <a-entity class="city"
        geometry="primitive: plane; height: 0.2; width: 0.5"
        data-raycastable
        material="color: black"
        text="value: ${city_name}; color: white; align: center; wrapCount: 10; font: exo2bold"
        event-set__mouseenter="scale: 1.5 1.5 1"
        event-set__mouseleave="scale: 1 1 1"
        event-set__1="_event: click; _target: #image-360; _delay: 300; material.src: ${src}"
        event-set__2="_event: click; _target: #models; _delay: 300; visible: false"
        event-set__3="_event: click; _target: #cities; _delay: 300; visible: true"
        event-set__4="_event: click; _target: #show_button; _delay: 300; visible: true"
        event-set__5="_event: click; _target: ${map}; _delay: 300; visible: true"
        proxy-event="event: click; to: #image-360; as: fade"
        sound="on: click; src: #click-sound"></a-entity>
    </script>

您在此处看到的 data-raycastable 参数正在运行此此处的脚本：

AFRAME.registerComponent('data-raycastable', {
      init: function () {
        var self = this;
        var el = this.el;
        var data = this.data;

        this.eventHandlerFn = function () {
          if (el.object3D.visible = true){
          el.setAttribute('data-raycastable', '');
          }
          else {
            el.removeAttribute('data-raycastable')
          }
        }

        update: function() {

          el.addEventListener('click', this.eventHandlerFn);
          } 
          }
        }
      })

现在，我想知道为什么我的这个脚本不起作用。我密切关注 A-frame 文档，试图使其工作，但它没有。光标按钮如下所示：

<a-entity id="camera" camera look-controls>
    <a-cursor
      id="cursor"
      material="color: black; shader: flat"
      position="0 0 -4.5"       
      geometry="primitive: ring; radiusInner: 0.15; radiusOuter: 0.2"
      animation__click="property: scale; startEvents: click; from: 0.1 0.1 0.1; to: 1 1 1; dur: 150"
      animation__fusing="property: fusing; startEvents: fusing; from: 1 1 1; to: 0.1 0.1 0.1; dur: 1500"
      event-set__mouseenter="_event: mouseenter; color: springgreen"
      event-set__mouseleave="_event: mouseleave; color: black"
      raycaster="objects: [data-raycastable], .link, .model">
    </a-cursor>        
  </a-entity> 

有人可以引导我朝着正确的方向前进吗？

Answer 1

不确定您的组件试图完成什么，到目前为止它存在语法错误（架构后缺少逗号）并且el 引用无效。更正代码：

AFRAME.registerComponent('data-raycastable', {         
          schema: {
            event: {type: 'boolean', default: true}  
          },
          init: function () {
            var el = this.el;
            el.addEventListener('click', function() {
                if (el.object3D.visible = false) {
                  el.classList.remove('raycastable');
                }
                else if (el.object3D.visible = true) {
                  el.classList.add('raycastable');
                }
            })
          }  
        });

使用类而不是数据属性来实现 raycastability。更正的故障：https://glitch.com/edit/#!/aquatic-aftershave