PositionSensorVRDevice: getImmediateState() method
==================================================

**Deprecated:** This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the compatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.

**Non-standard:** This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.

The **`getImmediateState()`** method of the `VRDisplay` 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
------


```js
getImmediateState()
```

### Parameters

None.

### Return value

A `VRPose` object.

Examples
--------

The following 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:


```js
function setView() {
  const 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;
    zPos = -posState.position.z > 0.01 ? -posState.position.z : 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 `VRPose` 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 `VRPose.position` and `VRPose.orientation` (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
---------------------

BCD tables only load in the browser with JavaScript enabled. Enable JavaScript to view data.

See also
--------

* WebVR API