ObsoleteThis feature is obsolete. Although it may still work in some browsers, its use is discouraged since it could be removed at any time. Try to avoid using it.
This is an experimental technologyCheck the Browser compatibility table carefully before using this in production.
The getImmediateState()
method of the VRDevice
interface returns the current instantaneous position sensor state. This is intended to only be used rarely, for certain special uses, for example sampling the immediate position of a hand orientation sensor — or at least it will be, in the future.
For most standard uses, you'll probably want to use PositionSensorVRDevice.getState
instead.
Syntax
var myPositionstate = PositionSensorVRDevice.getImmediateState();
Parameters
None.
Returns
A VRPositionState
object.
Examples
Our [[../../../../../../../mdn.github.io/webvr-tests/positionsensorvrdevice/index|positionsensorvrdevice]] demo uses the WebVR API to update the view of a simple 2D canvas
scene on each frame of a requestAnimationFrame
loop. The main function that updates the view data is as follows:
function setView() {
var posState = gPositionSensor.getImmediateState();
if(posState.hasPosition) {
posPara.textContent = 'Position: x' + roundToTwo(posState.position.x) + " y"
+ roundToTwo(posState.position.y) + " z"
+ roundToTwo(posState.position.z);
xPos = -posState.position.x * WIDTH * 2;
yPos = posState.position.y * HEIGHT * 2;
if(-posState.position.z > 0.01) {
zPos = -posState.position.z;
} else {
zPos = 0.01;
}
}
if(posState.hasOrientation) {
orientPara.textContent = 'Orientation: x' + roundToTwo(posState.orientation.x) + " y"
+ roundToTwo(posState.orientation.y) + " z"
+ roundToTwo(posState.orientation.z);
xOrient = posState.orientation.x * WIDTH;
yOrient = -posState.orientation.y * HEIGHT * 2;
zOrient = posState.orientation.z * 180;
}
}
Here we are grabbing a VRPositionState
object using getImmediateState()
and storing it in posState
(the actual live demo uses getState()
, but both seem to do the same thing currently.) We then check to make sure that position and orientation info is present in the current frame using VRPositionState.hasPosition
and VRPositionState.hasOrientation
(these return null
if, for example the head mounted display is turned off or not pointing at the position sensor, which would cause an error.)
We then output the x, y and z position and orientation values for informational purposes, and use those values to update the xPos
, yPos
, zPos,
xOrient
, yOrient
, and zOrient
variables, which are used to update the scene rendering on each frame.
Browser compatibility
The compatibility table on 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.
Update compatibility data on GitHub
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Chrome Full support Yes Full support Yes Notes' The support in Chrome is currently experimental. To find information on Chrome's WebVR implementation status including supporting builds, check out Bringing VR to Chrome by Brandon Jones. |
Edge Full support 79 Full support 79 Notes' The support in Edge is currently experimental. To find information on Edge's WebVR implementation status including supporting builds, check out Bringing VR to Edge by Brandon Jones. |
Firefox Full support 39 Full support 39 Notes' The support for this feature is currently disabled by default in Firefox. To enable WebVR support in Firefox Nightly/Developer Edition, you can go to |
IE
No support No |
Opera
No support No |
Safari
No support No |
WebView Android
No support No |
Chrome Android
No support No |
Firefox Android Full support 39 Full support 39 Notes' The support for this feature is currently disabled by default in Firefox. To enable WebVR support in Firefox Nightly/Developer Edition, you can go to Notes' The |
Opera Android
No support No |
Safari iOS
No support No |
Samsung Internet Android
No support No |
Legend
- Full support
- Full support
- No support
- No support
- Experimental. Expect behavior to change in the future.'
- Experimental. Expect behavior to change in the future.
- Non-standard. Expect poor cross-browser support.'
- Non-standard. Expect poor cross-browser support.
- Deprecated. Not for use in new websites.'
- Deprecated. Not for use in new websites.
- See implementation notes.'
- See implementation notes.
- User must explicitly enable this feature.'
- User must explicitly enable this feature.
See also
- WebVR API homepage.
- MozVr.com — demos, downloads, and other resources from the Mozilla VR team.
PositionSensorVRDevice.getImmediateState() by Mozilla Contributors is licensed under CC-BY-SA 2.5.