VRPose: linearAcceleration property

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 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.

Note: This property was part of the old WebVR API. It has been superseded by the WebXR Device API.

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

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
  const curFramePose = frameData.pose;
  const linAcc = curFramePose.linearAcceleration;
  const lax = linAcc[0];
  const lay = linAcc[1];
  const laz = linAcc[2];

  // render the scene
  // …

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

Specifications

This property was part of the old WebVR API that has been superseded by the WebXR Device API. It is no longer on track to becoming a standard.

Until all browsers have implemented the new WebXR APIs, it is recommended to rely on frameworks, like A-Frame, Babylon.js, or Three.js, or a polyfill, to develop WebXR applications that will work across all browsers [1].

Browser compatibility

BCD tables only load in the browser

See also