( function () {

	const _translationObject = new THREE.Vector3();
	const _quaternionObject = new THREE.Quaternion();
	const _scaleObject = new THREE.Vector3();
	const _translationWorld = new THREE.Vector3();
	const _quaternionWorld = new THREE.Quaternion();
	const _scaleWorld = new THREE.Vector3();
	class Gyroscope extends THREE.Object3D {

		constructor() {

			super();

		}
		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 ( let i = 0, l = this.children.length; i < l; i ++ ) {

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

			}

		}

	}

	THREE.Gyroscope = Gyroscope;

} )();