XRInputSourceEvent.frame

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用法注意事项
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安全上下文
此特征只可用于安全上下文 (HTTPS)，在某些或所有支持浏览器 .

只读 XRInputSourceEvent property frame specifies an XRFrame object representing the event frame during which a WebXR user input occurred. This may thus be an event which occurred in the past rather than a current or impending event.

句法

let inputFrame = xrInputSourceEvent.frame;

值

XRFrame indicating the event frame at which the user input event described by the object took place.

用法注意事项

The event frame does not correspond to a visual frame as is delivered to the frame rendering callback function (see Rendering and the WebXR frame rendering callback for details on the callback). Instead, the XRFrame 指定通过 frame property is simply a method to provide access to the getPose() method, which you can use to get the relative positions of the objects in the scene at the time the event occurred.

However, since the event frame isn't an animation frame, there is no viewer pose available to represent the viewer's current point of view; the results of calling getViewerPose() will be an XRViewerPose with an empty views 列表。

范例

This code shows a handler for the selectstart event which gets the target ray's pose from the frame, mapping the pose representing the ray ( event.inputSource.targetRaySpace ) to the overall reference space myRefSpace .

Then, if the result isn't null , the target ray pose's transform is passed into a function called myCheckAndHandleHit() to see if the ray was pointing at anything when the select was triggered.

xrSession.onselectstart = event => {
  let targetRayPose = event.frame.getPose(event.inputSource.targetRaySpace,
                            myRefSpace);
  if (targetRayPose) {
    checkAndHandleHit(targetRayPose.transform);
  }
};

规范

规范	状态	注释
WebXR 设备 API The definition of 'XRInputSourceEvent.frame' in that specification.	工作草案	初始定义。

浏览器兼容性

更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`frame`	Chrome 79	Edge 79	Firefox 不支持 No	IE 不支持 No	Opera 不支持 No	Safari 不支持 No	WebView Android 不支持 No	Chrome Android 79	Firefox Android 不支持 No	Opera Android 不支持 No	Safari iOS 不支持 No	Samsung Internet Android 11.2

图例

完整支持
不支持

元数据

最后修改： Mar 3, 2020

在此页

句法

值

用法注意事项

范例

规范

浏览器兼容性

图例

相关话题