XRRigidTransform

XRRigidTransform()

Creates a new XRRigidTransform object which represents a transform that applies a specified position and/or orientation.

XRRigidTransform.position Read only

A DOMPointReadOnly specifying a 3-dimensional point, expressed in meters, describing the translation component of the transform. The w property is always 1.0.

XRRigidTransform.orientation Read only

A DOMPointReadOnly which contains a unit quaternion describing the rotational component of the transform. As a unit quaternion, its length is always normalized to 1.0.

XRRigidTransform.matrix Read only

Returns the transform matrix in the form of a 16-member Float32Array. See the section Matrix format for how the array is used to represent a matrix.

XRRigidTransform.inverse Read only

Returns a XRRigidTransform which is the inverse of this transform. That is, if applied to an object that had been previously transformed by the original transform, it will undo the transform and return the original object.

When an XRRigidTransform is interpreted, the orientation is always applied to the affected object before the position is applied.

This code snippet creates an XRRigidTransform to specify the offset and orientation in relation to the current reference space to use when creating a new reference space. It then requests the first animation frame callback by calling the session's requestAnimationFrame() method.

xrSession.requestReferenceSpace(refSpaceType).then((refSpace) => {
  xrReferenceSpace = refSpace;
  xrReferenceSpace = xrReferenceSpace.getOffsetReferenceSpace(
    new XRRigidTransform(viewerStartPosition, cubeOrientation),
  );
  animationFrameRequestID = xrSession.requestAnimationFrame(drawFrame);
});