xr文档：https://developers.weixin.qq.com/miniprogram/dev/api/xr-frame/classes/XRNode.html
我的需求：人脸识别到下巴43点位，在该点位放置一个物品，由于需要将其放到大概脖子处，所以需要将该物品位移，位移这一步怎么传参处理？文档里的传参表示看不懂
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rotation scale position 在wxml中的参数值都是“x y z”，这些值引擎解析后自动应用到Transform组件上的。
比如 <xr-gltf position="0 1 0" />