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The WebXR Device API's XRInputSourceEvent
interface describes an event which has occurred on a WebXR user input device such as a hand controller, gaze tracking system, or motion tracking system. More specifically, they represent a change in the state of an XRInputSource
.
To learn more about handling inputs in a WebXR project, see the article Inputs and input sources.
Event XRInputSourceEvent ConstructorXRInputSourceEvent()
Creates and returns a new XRInputSourceEvent
object whose properties match those provided in the eventInitDict
dictionary provided.
frame
Read only
An XRFrame
object providing the needed information about the event frame during which the event occurred. This frame may have been rendered in the past rather than being a current frame. Because this is an event frame, not an animation frame, you cannot call the XRFrame
method getViewerPose()
on it; instead, use getPose()
.
inputSource
Read only
An XRInputSource
object indicating which input source generated the input event.
The XRInputSourceEvent
interface doesn't define any methods; however, several methods are inherited from the parent interface, Event
.
select
Sent to an XRSession
when the sending input source has fully completed a primary action.
selectend
Sent to an XRSession
when an ongoing primary action ends, or when an input source with an ongoing primary action has been disconnected from the system.
selectstart
Sent to an XRSession
when an input source begins its primary action, indicating that the user has begun a command-like input, such as pressing a trigger or button, issuing a spoken command, tapping on a touchpad, or the like.
squeeze
Sent to an XRSession
when the sending input source has fully completed a primary squeeze action.
squeezeend
Sent to an XRSession
when an ongoing primary squeeze action ends or when an input source with an ongoing primary squeeze action is disconnected.
squeezestart
Sent to an XRSession
when an input source begins its primary squeeze action, indicating that the user has begun to grab, squeeze, or grip the controller.
The code below sets up handlers for primary action events in order to determine when the user clicks on (shoots at/pokes at/whatever) objects in the scene.
xrSession.addEventListener("select", (event) => {
let targetRayPose = event.frame.getPose(
event.inputSource.targetRaySpace,
myRefSpace,
);
if (targetRayPose) {
let hit = myHitTest(targetRayPose.transform);
if (hit) {
/* handle the hit */
}
}
});
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