three.js/examples/js/misc/Gyroscope.js

( function () {

	var Gyroscope = function () {

		THREE.Object3D.call( this );

	};

	Gyroscope.prototype = Object.create( THREE.Object3D.prototype );
	Gyroscope.prototype.constructor = Gyroscope;

	Gyroscope.prototype.updateMatrixWorld = function () {

		var translationObject = new THREE.Vector3();
		var quaternionObject = new THREE.Quaternion();
		var scaleObject = new THREE.Vector3();
		var translationWorld = new THREE.Vector3();
		var quaternionWorld = new THREE.Quaternion();
		var scaleWorld = new THREE.Vector3();
		return function updateMatrixWorld( force ) {

			this.matrixAutoUpdate && this.updateMatrix(); // update matrixWorld

			if ( this.matrixWorldNeedsUpdate || force ) {

				if ( this.parent !== null ) {

					this.matrixWorld.multiplyMatrices( this.parent.matrixWorld, this.matrix );
					this.matrixWorld.decompose( translationWorld, quaternionWorld, scaleWorld );
					this.matrix.decompose( translationObject, quaternionObject, scaleObject );
					this.matrixWorld.compose( translationWorld, quaternionObject, scaleWorld );

				} else {

					this.matrixWorld.copy( this.matrix );

				}

				this.matrixWorldNeedsUpdate = false;
				force = true;

			} // update children


			for ( var i = 0, l = this.children.length; i < l; i ++ ) {

				this.children[ i ].updateMatrixWorld( force );

			}

		};

	}();

	THREE.Gyroscope = Gyroscope;

} )();