有没有办法更新/重置方向？ [英] Is there a way to recenter / reset orientation?

问题描述

我只是想知道是否有内置功能可以重置磁头旋转。
我见过的大多数VR SDK（Oculus，Carboard等）都可以将当前旋转设为默认的正向旋转。
是否可以在a帧中执行此操作？

I just wanted to know if there is a buit-in function to reset head rotation. Most VR SDKs I've seen (Oculus, Carboard, etc) have a way to make current rotation the default forward rotation. Is there a simple way to do this in a-frame?

推荐答案

您可以在框架周围添加包装器实体相机，并在一个事件中，将实体包装器绕Y轴的旋转设置为负值，使相机绕Y轴的旋转为负。

You can add a wrapper entity around the camera, and on an event, set the entity wrapper's rotation about the Y-axis to be negative the camera's rotation about the Y-axis.

以下是一个示例（但在React）使用@jhsu的shake.js：

Here's an example (but in React) using shake.js by @jhsu:

import React from 'react';
import Camera from './Camera';
import Shake from 'shake.js';

class Player extends Component {
  componentDidMount() {
    this.shaker = new Shake({
      threshold: 5,
      timeout: 250,
    });
    this.shaker.start();
    window.addEventListener('shake', this.reorient, false);
  }

  reorient() {
    if (this.camera) {
      const rotation = this.camera.getAttribute('rotation');
      this.setState({
        orientation: { x: 0, y: -1 * rotation.y, z: 0 }
      });
    }
  }

  cameraMounted = (camera) => {
    this.camera = camera;
  }

  render() {
    return <Camera
      rotation={this.state.orientation}
      onMount={this.cameraMounted}
    />
  }
}

一个组件为：

AFRAME.registerComponent('resetorientation', {
  init: function () {
    var el = this.el;
    el.addEventListener('resetorientation', function () {
      var y = el.querySelector('[camera]').getAttribute('rotation').y;
      el.setAttribute('rotation', {y: -1 * y});
    });
  }
});

<a-entity id="cameraWrapper" resetorientation><a-camera></a-camera></a-entity>

document.querySelector('#cameraWrapper').emit('resetorientation');

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