VRPose.linearAcceleration

Experimental

This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The linearAcceleration read-only property of the VRPose interface returns an array representing the linear acceleration vector of the VRDisplay at the current VRPose.timestamp, in meters per second per second.

In other words, the current acceleration of the sensor, along the x, y, and z axes.

Syntax

var myLinearAcceleration = VRPose.linearAcceleration;

Value

A Float32Array, or null if the VR sensor is not able to provide linear acceleration data.

Examples

// rendering loop for a VR scene
function drawVRScene() {
  // WebVR: Request the next frame of the animation
  vrSceneFrame = vrDisplay.requestAnimationFrame(drawVRScene);

  // Populate frameData with the data of the next frame to display
  vrDisplay.getFrameData(frameData);

  // Retrieve the linear acceleration values for use in rendering
  // curFramePose is a VRPose object
  var curFramePose = frameData.pose;
  var linAcc = curFramePose.linearAcceleration;
  var lax = linAcc[0];
  var lay = linAcc[1];
  var laz = linAcc[2];

  // render the scene
  ...

  // WebVR: submit the rendered frame to the VR display
  vrDisplay.submitFrame();
}

Specifications

Specification Status Comment
WebVR 1.1
The definition of 'linearAcceleration' in that specification.
Draft Initial definition

Browser compatibility

BCD tables only load in the browser

See also