The WebXR enumerated type
XRHandedness
provides values which identify which of a user's hands is being used to operate a particular input controller attached to the XR input device being used.
XRHandedness
is used as the value of the the
XRInputSource
property
handedness
.
none
The input controller is not associated with one of the user's hands.
left
The input controller is being held in, worn on, or is attached to the user's left hand.
right
The input controller is being held in, worn on, or is attached to the user's right hand.
One important usage scentario for
handedness
is to determine which hand a controller is in so you can draw a representation of that hand (or the device that hand is controlling) in virtual space.
function updateInputSources(session, frame, refSpace) {
for (let source of session.inputSources) {
if (source.gripSpace) {
let gripPose = frame.getPose(source.gripSpace, refSpace);
if (gripPose) {
myRenderHandObject(gripPose, inputSource.handedness);
}
}
}
}
This function, which would be called every animation frame (or possibly just periodically, depending on the degree of smoothness required and any performance constraints), scans the list of input sources looking for any which have a
gripSpace
which isn't
null
. If a
gripSpace
is present, that means the input source is a hand-held device of some sort, so it should be rendered visibly if possible.
若
gripSpace
为非
null
, the function proceeds to get the pose for the
gripSpace
transformed into the current reference space. Assuming that's then valid, a function called
myRenderHandObject()
is called with the grip's pose and the value of
handedness
. WIth these values in hand (no pun intended),
myRenderHandObject()
can draw the appropriate model positioned and formed for the correct hand.
| 规范 | 状态 | 注释 |
|---|---|---|
|
WebXR 设备 API
The definition of 'XRHandedness' in that specification. |
工作草案 | 初始定义。 |
The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
No compatibility data found. Please contribute data for "api.XRHandedness" (depth: 1) to the MDN 兼容性数据存储库 .
XREye
: Indicates which eye a view should be displayed for