text: //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
  // WARNING: This file was auto-generated, any change will be overridden in next release. Please use configs/es6.conf.js then run "npm run convert". //
  //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
  import { Object3D } from '../core/Object3D.js'
  import { Mesh } from '../objects/Mesh.js'
  import { Raycaster } from '../core/Raycaster.js'
  import { Vector3 } from '../math/Vector3.js'
  import { Quaternion } from '../math/Quaternion.js'
  import { MeshBasicMaterial } from '../materials/MeshBasicMaterial.js'
  import { LineBasicMaterial } from '../materials/LineBasicMaterial.js'
  import { CylinderBufferGeometry } from '../geometries/CylinderGeometry.js'
  import { BoxBufferGeometry } from '../geometries/BoxGeometry.js'
  import { BufferGeometry } from '../core/BufferGeometry.js'
  import { Float32BufferAttribute } from '../core/BufferAttribute.js'
  import { Line } from '../objects/Line.js'
  import { OctahedronBufferGeometry } from '../geometries/OctahedronGeometry.js'
  import { PlaneBufferGeometry } from '../geometries/PlaneGeometry.js'
  import { TorusBufferGeometry } from '../geometries/TorusGeometry.js'
  import { SphereBufferGeometry } from '../geometries/SphereGeometry.js'
  import { Euler } from '../math/Euler.js'
  import { Matrix4 } from '../math/Matrix4.js'
  import { Color } from '../math/Color.js'
  import { PerspectiveCamera } from '../cameras/PerspectiveCamera.js'
  import { OrthographicCamera } from '../cameras/OrthographicCamera.js'
  import { DoubleSide } from '../constants.js'
  var TransformControls = function ( camera, domElement ) {
  
  	Object3D.call( this );
  
  	domElement = ( domElement !== undefined ) ? domElement : document;
  
  	this.visible = false;
  
  	var _gizmo = new TransformControlsGizmo();
  	this.add( _gizmo );
  
  	var _plane = new TransformControlsPlane();
  	this.add( _plane );
  
  	var scope = this;
  
  	// Define properties with getters/setter
  	// Setting the defined property will automatically trigger change event
  	// Defined properties are passed down to gizmo and plane
  
  	defineProperty( "camera", camera );
  	defineProperty( "object", undefined );
  	defineProperty( "enabled", true );
  	defineProperty( "axis", null );
  	defineProperty( "mode", "translate" );
  	defineProperty( "translationSnap", null );
  	defineProperty( "rotationSnap", null );
  	defineProperty( "space", "world" );
  	defineProperty( "size", 1 );
  	defineProperty( "dragging", false );
  	defineProperty( "showX", true );
  	defineProperty( "showY", true );
  	defineProperty( "showZ", true );
  
  	var changeEvent = { type: "change" };
  	var mouseDownEvent = { type: "mouseDown" };
  	var mouseUpEvent = { type: "mouseUp", mode: scope.mode };
  	var objectChangeEvent = { type: "objectChange" };
  
  	// Reusable utility variables
  
  	var ray = new Raycaster();
  
  	var _tempVector = new Vector3();
  	var _tempVector2 = new Vector3();
  	var _tempQuaternion = new Quaternion();
  	var _unit = {
  		X: new Vector3( 1, 0, 0 ),
  		Y: new Vector3( 0, 1, 0 ),
  		Z: new Vector3( 0, 0, 1 )
  	};
  	var _identityQuaternion = new Quaternion();
  	var _alignVector = new Vector3();
  
  	var pointStart = new Vector3();
  	var pointEnd = new Vector3();
  	var offset = new Vector3();
  	var rotationAxis = new Vector3();
  	var startNorm = new Vector3();
  	var endNorm = new Vector3();
  	var rotationAngle = 0;
  
  	var cameraPosition = new Vector3();
  	var cameraQuaternion = new Quaternion();
  	var cameraScale = new Vector3();
  
  	var parentPosition = new Vector3();
  	var parentQuaternion = new Quaternion();
  	var parentQuaternionInv = new Quaternion();
  	var parentScale = new Vector3();
  
  	var worldPositionStart = new Vector3();
  	var worldQuaternionStart = new Quaternion();
  	var worldScaleStart = new Vector3();
  
  	var worldPosition = new Vector3();
  	var worldQuaternion = new Quaternion();
  	var worldQuaternionInv = new Quaternion();
  	var worldScale = new Vector3();
  
  	var eye = new Vector3();
  
  	var positionStart = new Vector3();
  	var quaternionStart = new Quaternion();
  	var scaleStart = new Vector3();
  
  	// TODO: remove properties unused in plane and gizmo
  
  	defineProperty( "worldPosition", worldPosition );
  	defineProperty( "worldPositionStart", worldPositionStart );
  	defineProperty( "worldQuaternion", worldQuaternion );
  	defineProperty( "worldQuaternionStart", worldQuaternionStart );
  	defineProperty( "cameraPosition", cameraPosition );
  	defineProperty( "cameraQuaternion", cameraQuaternion );
  	defineProperty( "pointStart", pointStart );
  	defineProperty( "pointEnd", pointEnd );
  	defineProperty( "rotationAxis", rotationAxis );
  	defineProperty( "rotationAngle", rotationAngle );
  	defineProperty( "eye", eye );
  
  	{
  
  		domElement.addEventListener( "mousedown", onPointerDown, false );
  		domElement.addEventListener( "touchstart", onPointerDown, false );
  		domElement.addEventListener( "mousemove", onPointerHover, false );
  		domElement.addEventListener( "touchmove", onPointerHover, false );
  		domElement.addEventListener( "touchmove", onPointerMove, false );
  		document.addEventListener( "mouseup", onPointerUp, false );
  		domElement.addEventListener( "touchend", onPointerUp, false );
  		domElement.addEventListener( "touchcancel", onPointerUp, false );
  		domElement.addEventListener( "touchleave", onPointerUp, false );
  
  	}
  
  	this.dispose = function () {
  
  		domElement.removeEventListener( "mousedown", onPointerDown );
  		domElement.removeEventListener( "touchstart", onPointerDown );
  		domElement.removeEventListener( "mousemove", onPointerHover );
  		domElement.removeEventListener( "touchmove", onPointerHover );
  		domElement.removeEventListener( "touchmove", onPointerMove );
  		document.removeEventListener( "mouseup", onPointerUp );
  		domElement.removeEventListener( "touchend", onPointerUp );
  		domElement.removeEventListener( "touchcancel", onPointerUp );
  		domElement.removeEventListener( "touchleave", onPointerUp );
  
  	};
  
  	// Set current object
  	this.attach = function ( object ) {
  
  		this.object = object;
  		this.visible = true;
  
  	};
  
  	// Detatch from object
  	this.detach = function () {
  
  		this.object = undefined;
  		this.visible = false;
  		this.axis = null;
  
  	};
  
  	// Defined getter, setter and store for a property
  	function defineProperty( propName, defaultValue ) {
  
  		var propValue = defaultValue;
  
  		Object.defineProperty( scope, propName, {
  
  			get: function() {
  
  				return propValue !== undefined ? propValue : defaultValue;
  
  			},
  
  			set: function( value ) {
  
  				if ( propValue !== value ) {
  
  					propValue = value;
  					_plane[ propName ] = value;
  					_gizmo[ propName ] = value;
  
  					scope.dispatchEvent( { type: propName + "-changed", value: value } );
  					scope.dispatchEvent( changeEvent );
  
  				}
  
  			}
  
  		});
  
  		scope[ propName ] = defaultValue;
  		_plane[ propName ] = defaultValue;
  		_gizmo[ propName ] = defaultValue;
  
  	}
  
  	// updateMatrixWorld  updates key transformation variables
  	this.updateMatrixWorld = function () {
  
  		if ( this.object !== undefined ) {
  
  			this.object.updateMatrixWorld();
  			this.object.parent.matrixWorld.decompose( parentPosition, parentQuaternion, parentScale );
  			this.object.matrixWorld.decompose( worldPosition, worldQuaternion, worldScale );
  
  			parentQuaternionInv.copy( parentQuaternion ).inverse();
  			worldQuaternionInv.copy( worldQuaternion ).inverse();
  
  		}
  
  		this.camera.updateMatrixWorld();
  		this.camera.matrixWorld.decompose( cameraPosition, cameraQuaternion, cameraScale );
  
  		if ( this.camera instanceof PerspectiveCamera ) {
  
  			eye.copy( cameraPosition ).sub( worldPosition ).normalize();
  
  		} else if ( this.camera instanceof OrthographicCamera ) {
  
  			eye.copy( cameraPosition ).normalize();
  
  		}
  
  		Object3D.prototype.updateMatrixWorld.call( this );
  
  	};
  
  	this.pointerHover = function( pointer ) {
  
  		if ( this.object === undefined || this.dragging === true || ( pointer.button !== undefined && pointer.button !== 0 ) ) return;
  
  		ray.setFromCamera( pointer, this.camera );
  
  		var intersect = ray.intersectObjects( _gizmo.picker[ this.mode ].children, true )[ 0 ] || false;
  
  		if ( intersect ) {
  
  			this.axis = intersect.object.name;
  
  		} else {
  
  			this.axis = null;
  
  		}
  
  	};
  
  	this.pointerDown = function( pointer ) {
  
  		if ( this.object === undefined || this.dragging === true || ( pointer.button !== undefined && pointer.button !== 0 ) ) return;
  
  		if ( ( pointer.button === 0 || pointer.button === undefined ) && this.axis !== null ) {
  
  			ray.setFromCamera( pointer, this.camera );
  
  			var planeIntersect = ray.intersectObjects( [ _plane ], true )[ 0 ] || false;
  
  			if ( planeIntersect ) {
  
  				var space = this.space;
  
  				if ( this.mode === 'scale') {
  
  					space = 'local';
  
  				} else if ( this.axis === 'E' ||  this.axis === 'XYZE' ||  this.axis === 'XYZ' ) {
  
  					space = 'world';
  
  				}
  
  				if ( space === 'local' && this.mode === 'rotate' ) {
  
  					var snap = this.rotationSnap;
  
  					if ( this.axis === 'X' && snap ) this.object.rotation.x = Math.round( this.object.rotation.x / snap ) * snap;
  					if ( this.axis === 'Y' && snap ) this.object.rotation.y = Math.round( this.object.rotation.y / snap ) * snap;
  					if ( this.axis === 'Z' && snap ) this.object.rotation.z = Math.round( this.object.rotation.z / snap ) * snap;
  
  				}
  
  				this.object.updateMatrixWorld();
  				this.object.parent.updateMatrixWorld();
  
  				positionStart.copy( this.object.position );
  				quaternionStart.copy( this.object.quaternion );
  				scaleStart.copy( this.object.scale );
  
  				this.object.matrixWorld.decompose( worldPositionStart, worldQuaternionStart, worldScaleStart );
  
  				pointStart.copy( planeIntersect.point ).sub( worldPositionStart );
  
  			}
  
  			this.dragging = true;
  			mouseDownEvent.mode = this.mode;
  			this.dispatchEvent( mouseDownEvent );
  
  		}
  
  	};
  
  	this.pointerMove = function( pointer ) {
  
  		var axis = this.axis;
  		var mode = this.mode;
  		var object = this.object;
  		var space = this.space;
  
  		if ( mode === 'scale') {
  
  			space = 'local';
  
  		} else if ( axis === 'E' ||  axis === 'XYZE' ||  axis === 'XYZ' ) {
  
  			space = 'world';
  
  		}
  
  		if ( object === undefined || axis === null || this.dragging === false || ( pointer.button !== undefined && pointer.button !== 0 ) ) return;
  
  		ray.setFromCamera( pointer, this.camera );
  
  		var planeIntersect = ray.intersectObjects( [ _plane ], true )[ 0 ] || false;
  
  		if ( planeIntersect === false ) return;
  
  		pointEnd.copy( planeIntersect.point ).sub( worldPositionStart );
  
  		if ( mode === 'translate' ) {
  
  			// Apply translate
  
  			offset.copy( pointEnd ).sub( pointStart );
  
  			if ( space === 'local' && axis !== 'XYZ' ) {
  				offset.applyQuaternion( worldQuaternionInv );
  			}
  
  			if ( axis.indexOf( 'X' ) === -1 ) offset.x = 0;
  			if ( axis.indexOf( 'Y' ) === -1 ) offset.y = 0;
  			if ( axis.indexOf( 'Z' ) === -1 ) offset.z = 0;
  
  			if ( space === 'local' && axis !== 'XYZ') {
  				offset.applyQuaternion( quaternionStart ).divide( parentScale );
  			} else {
  				offset.applyQuaternion( parentQuaternionInv ).divide( parentScale );
  			}
  
  			object.position.copy( offset ).add( positionStart );
  
  			// Apply translation snap
  
  			if ( this.translationSnap ) {
  
  				if ( space === 'local' ) {
  
  					object.position.applyQuaternion(_tempQuaternion.copy( quaternionStart ).inverse() );
  
  					if ( axis.search( 'X' ) !== -1 ) {
  						object.position.x = Math.round( object.position.x / this.translationSnap ) * this.translationSnap;
  					}
  
  					if ( axis.search( 'Y' ) !== -1 ) {
  						object.position.y = Math.round( object.position.y / this.translationSnap ) * this.translationSnap;
  					}
  
  					if ( axis.search( 'Z' ) !== -1 ) {
  						object.position.z = Math.round( object.position.z / this.translationSnap ) * this.translationSnap;
  					}
  
  					object.position.applyQuaternion( quaternionStart );
  
  				}
  
  				if ( space === 'world' ) {
  
  					if ( object.parent ) {
  						object.position.add( _tempVector.setFromMatrixPosition( object.parent.matrixWorld ) );
  					}
  
  					if ( axis.search( 'X' ) !== -1 ) {
  						object.position.x = Math.round( object.position.x / this.translationSnap ) * this.translationSnap;
  					}
  
  					if ( axis.search( 'Y' ) !== -1 ) {
  						object.position.y = Math.round( object.position.y / this.translationSnap ) * this.translationSnap;
  					}
  
  					if ( axis.search( 'Z' ) !== -1 ) {
  						object.position.z = Math.round( object.position.z / this.translationSnap ) * this.translationSnap;
  					}
  
  					if ( object.parent ) {
  						object.position.sub( _tempVector.setFromMatrixPosition( object.parent.matrixWorld ) );
  					}
  
  				}
  
  			}
  
  		} else if ( mode === 'scale' ) {
  
  			if ( axis.search( 'XYZ' ) !== -1 ) {
  
  				var d = pointEnd.length() / pointStart.length();
  
  				if ( pointEnd.dot( pointStart ) < 0 ) d *= -1;
  
  				_tempVector.set( d, d, d );
  
  			} else {
  
  				_tempVector.copy( pointEnd ).divide( pointStart );
  
  				if ( axis.search( 'X' ) === -1 ) {
  					_tempVector.x = 1;
  				}
  				if ( axis.search( 'Y' ) === -1 ) {
  					_tempVector.y = 1;
  				}
  				if ( axis.search( 'Z' ) === -1 ) {
  					_tempVector.z = 1;
  				}
  
  			}
  
  			// Apply scale
  
  			object.scale.copy( scaleStart ).multiply( _tempVector );
  
  		} else if ( mode === 'rotate' ) {
  
  			offset.copy( pointEnd ).sub( pointStart );
  
  			var ROTATION_SPEED = 20 / worldPosition.distanceTo( _tempVector.setFromMatrixPosition( this.camera.matrixWorld ) );
  
  			if ( axis === 'E' ) {
  
  				rotationAxis.copy( eye );
  				rotationAngle = pointEnd.angleTo( pointStart );
  
  				startNorm.copy( pointStart ).normalize();
  				endNorm.copy( pointEnd ).normalize();
  
  				rotationAngle *= ( endNorm.cross( startNorm ).dot( eye ) < 0 ? 1 : -1);
  
  			} else if ( axis === 'XYZE' ) {
  
  				rotationAxis.copy( offset ).cross( eye ).normalize(  );
  				rotationAngle = offset.dot( _tempVector.copy( rotationAxis ).cross( this.eye ) ) * ROTATION_SPEED;
  
  			} else if ( axis === 'X' || axis === 'Y' || axis === 'Z' ) {
  
  				rotationAxis.copy( _unit[ axis ] );
  
  				_tempVector.copy( _unit[ axis ] );
  
  				if ( space === 'local' ) {
  					_tempVector.applyQuaternion( worldQuaternion );
  				}
  
  				rotationAngle = offset.dot( _tempVector.cross( eye ).normalize() ) * ROTATION_SPEED;
  
  			}
  
  			// Apply rotation snap
  
  			if ( this.rotationSnap ) rotationAngle = Math.round( rotationAngle / this.rotationSnap ) * this.rotationSnap;
  
  			this.rotationAngle = rotationAngle;
  
  			// Apply rotate
  			if ( space === 'local' && axis !== 'E' && axis !== 'XYZE' ) {
  
  				object.quaternion.copy( quaternionStart );
  				object.quaternion.multiply( _tempQuaternion.setFromAxisAngle( rotationAxis, rotationAngle ) ).normalize();
  
  			} else {
  
  				rotationAxis.applyQuaternion( parentQuaternionInv );
  				object.quaternion.copy( _tempQuaternion.setFromAxisAngle( rotationAxis, rotationAngle ) );
  				object.quaternion.multiply( quaternionStart ).normalize();
  
  			}
  
  		}
  
  		this.dispatchEvent( changeEvent );
  		this.dispatchEvent( objectChangeEvent );
  
  	};
  
  	this.pointerUp = function( pointer ) {
  
  		if ( pointer.button !== undefined && pointer.button !== 0 ) return;
  
  		if ( this.dragging && ( this.axis !== null ) ) {
  
  			mouseUpEvent.mode = this.mode;
  			this.dispatchEvent( mouseUpEvent );
  
  		}
  
  		this.dragging = false;
  
  		if ( pointer.button === undefined ) this.axis = null;
  
  	};
  
  	// normalize mouse / touch pointer and remap {x,y} to view space.
  
  	function getPointer( event ) {
  
  		var pointer = event.changedTouches ? event.changedTouches[ 0 ] : event;
  
  		var rect = domElement.getBoundingClientRect();
  
  		return {
  			x: ( pointer.clientX - rect.left ) / rect.width * 2 - 1,
  			y: - ( pointer.clientY - rect.top ) / rect.height * 2 + 1,
  			button: event.button
  		};
  
  	}
  
  	// mouse / touch event handlers
  
  	function onPointerHover( event ) {
  
  		if ( !scope.enabled ) return;
  
  		scope.pointerHover( getPointer( event ) );
  
  	}
  
  	function onPointerDown( event ) {
  
  		if ( !scope.enabled ) return;
  
  		document.addEventListener( "mousemove", onPointerMove, false );
  
  		scope.pointerHover( getPointer( event ) );
  		scope.pointerDown( getPointer( event ) );
  
  	}
  
  	function onPointerMove( event ) {
  
  		if ( !scope.enabled ) return;
  
  		scope.pointerMove( getPointer( event ) );
  
  	}
  
  	function onPointerUp( event ) {
  
  		if ( !scope.enabled ) return;
  
  		document.removeEventListener( "mousemove", onPointerMove, false );
  
  		scope.pointerUp( getPointer( event ) );
  
  	}
  
  	// TODO: depricate
  
  	this.getMode = function () {
  
  		return scope.mode;
  
  	};
  
  	this.setMode = function ( mode ) {
  
  		scope.mode = mode;
  
  	};
  
  	this.setTranslationSnap = function ( translationSnap ) {
  
  		scope.translationSnap = translationSnap;
  
  	};
  
  	this.setRotationSnap = function ( rotationSnap ) {
  
  		scope.rotationSnap = rotationSnap;
  
  	};
  
  	this.setSize = function ( size ) {
  
  		scope.size = size;
  
  	};
  
  	this.setSpace = function ( space ) {
  
  		scope.space = space;
  
  	};
  
  	this.update = function () {
  
  		console.warn( 'TransformControls: update function has been depricated.' );
  
  	};
  
  };
  
  TransformControls.prototype = Object.assign( Object.create( Object3D.prototype ), {
  
    constructor: TransformControls,
  
    isTransformControls: true
  
  } );
  var TransformControlsGizmo = function () {
  
  	'use strict';
  
  	Object3D.call( this );
  
  	this.type = 'TransformControlsGizmo';
  
  	// shared materials
  
  	var gizmoMaterial = new MeshBasicMaterial({
  		depthTest: false,
  		depthWrite: false,
  		transparent: true,
  		side: DoubleSide,
  		fog: false
  	});
  
  	var gizmoLineMaterial = new LineBasicMaterial({
  		depthTest: false,
  		depthWrite: false,
  		transparent: true,
  		linewidth: 1,
  		fog: false
  	});
  
  	// Make unique material for each axis/color
  
  	var matInvisible = gizmoMaterial.clone();
  	matInvisible.opacity = 0.15;
  
  	var matHelper = gizmoMaterial.clone();
  	matHelper.opacity = 0.33;
  
  	var matRed = gizmoMaterial.clone();
  	matRed.color.set( 0xff0000 );
  
  	var matGreen = gizmoMaterial.clone();
  	matGreen.color.set( 0x00ff00 );
  
  	var matBlue = gizmoMaterial.clone();
  	matBlue.color.set( 0x0000ff );
  
  	var matWhiteTransperent = gizmoMaterial.clone();
  	matWhiteTransperent.opacity = 0.25;
  
  	var matYellowTransparent = matWhiteTransperent.clone();
  	matYellowTransparent.color.set( 0xffff00 );
  
  	var matCyanTransparent = matWhiteTransperent.clone();
  	matCyanTransparent.color.set( 0x00ffff );
  
  	var matMagentaTransparent = matWhiteTransperent.clone();
  	matMagentaTransparent.color.set( 0xff00ff );
  
  	var matYellow = gizmoMaterial.clone();
  	matYellow.color.set( 0xffff00 );
  
  	var matLineRed = gizmoLineMaterial.clone();
  	matLineRed.color.set( 0xff0000 );
  
  	var matLineGreen = gizmoLineMaterial.clone();
  	matLineGreen.color.set( 0x00ff00 );
  
  	var matLineBlue = gizmoLineMaterial.clone();
  	matLineBlue.color.set( 0x0000ff );
  
  	var matLineCyan = gizmoLineMaterial.clone();
  	matLineCyan.color.set( 0x00ffff );
  
  	var matLineMagenta = gizmoLineMaterial.clone();
  	matLineMagenta.color.set( 0xff00ff );
  
  	var matLineYellow = gizmoLineMaterial.clone();
  	matLineYellow.color.set( 0xffff00 );
  
  	var matLineGray = gizmoLineMaterial.clone();
  	matLineGray.color.set( 0x787878);
  
  	var matLineYellowTransparent = matLineYellow.clone();
  	matLineYellowTransparent.opacity = 0.25;
  
  	// reusable geometry
  
  	var arrowGeometry = new CylinderBufferGeometry( 0, 0.05, 0.2, 12, 1, false);
  
  	var scaleHandleGeometry = new BoxBufferGeometry( 0.125, 0.125, 0.125);
  
  	var lineGeometry = new BufferGeometry( );
  	lineGeometry.addAttribute('position', new Float32BufferAttribute( [ 0, 0, 0,	1, 0, 0 ], 3 ) );
  
  	var CircleGeometry = function( radius, arc ) {
  
  		var geometry = new BufferGeometry( );
  		var vertices = [];
  
  		for ( var i = 0; i <= 64 * arc; ++i ) {
  
  			vertices.push( 0, Math.cos( i / 32 * Math.PI ) * radius, Math.sin( i / 32 * Math.PI ) * radius );
  
  		}
  
  		geometry.addAttribute('position', new Float32BufferAttribute( vertices, 3 ) );
  
  		return geometry;
  
  	};
  
  	// Special geometry for transform helper. If scaled with position vector it spans from [0,0,0] to position
  
  	var TranslateHelperGeometry = function( radius, arc ) {
  
  		var geometry = new BufferGeometry()
  
  		geometry.addAttribute('position', new Float32BufferAttribute( [ 0, 0, 0, 1, 1, 1 ], 3 ) );
  
  		return geometry;
  
  	};
  
  	// Gizmo definitions - custom hierarchy definitions for setupGizmo() function
  
  	var gizmoTranslate = {
  		X: [
  			[ new Mesh( arrowGeometry, matRed ), [ 1, 0, 0 ], [ 0, 0, -Math.PI / 2 ], null, 'fwd' ],
  			[ new Mesh( arrowGeometry, matRed ), [ 1, 0, 0 ], [ 0, 0, Math.PI / 2 ], null, 'bwd' ],
  			[ new Line( lineGeometry, matLineRed ) ]
  		],
  		Y: [
  			[ new Mesh( arrowGeometry, matGreen ), [ 0, 1, 0 ], null, null, 'fwd' ],
  			[ new Mesh( arrowGeometry, matGreen ), [ 0, 1, 0 ], [ Math.PI, 0, 0 ], null, 'bwd' ],
  			[ new Line( lineGeometry, matLineGreen ), null, [ 0, 0, Math.PI / 2 ] ]
  		],
  		Z: [
  			[ new Mesh( arrowGeometry, matBlue ), [ 0, 0, 1 ], [ Math.PI / 2, 0, 0 ], null, 'fwd' ],
  			[ new Mesh( arrowGeometry, matBlue ), [ 0, 0, 1 ], [ -Math.PI / 2, 0, 0 ], null, 'bwd' ],
  			[ new Line( lineGeometry, matLineBlue ), null, [ 0, -Math.PI / 2, 0 ] ]
  		],
  		XYZ: [
  			[ new Mesh( new OctahedronBufferGeometry( 0.1, 0 ), matWhiteTransperent ), [ 0, 0, 0 ], [ 0, 0, 0 ] ]
  		],
  		XY: [
  			[ new Mesh( new PlaneBufferGeometry( 0.295, 0.295 ), matYellowTransparent ), [ 0.15, 0.15, 0 ] ],
  			[ new Line( lineGeometry, matLineYellow ), [ 0.18, 0.3, 0 ], null, [ 0.125, 1, 1 ] ],
  			[ new Line( lineGeometry, matLineYellow ), [ 0.3, 0.18, 0 ], [ 0, 0, Math.PI / 2 ], [ 0.125, 1, 1 ] ]
  		],
  		YZ: [
  			[ new Mesh( new PlaneBufferGeometry( 0.295, 0.295 ), matCyanTransparent ), [ 0, 0.15, 0.15 ], [ 0, Math.PI / 2, 0 ] ],
  			[ new Line( lineGeometry, matLineCyan ), [ 0, 0.18, 0.3 ], [ 0, 0, Math.PI / 2 ], [ 0.125, 1, 1 ] ],
  			[ new Line( lineGeometry, matLineCyan ), [ 0, 0.3, 0.18 ], [ 0, -Math.PI / 2, 0 ], [ 0.125, 1, 1 ] ]
  		],
  		XZ: [
  			[ new Mesh( new PlaneBufferGeometry( 0.295, 0.295 ), matMagentaTransparent ), [ 0.15, 0, 0.15 ], [ -Math.PI / 2, 0, 0 ] ],
  			[ new Line( lineGeometry, matLineMagenta ), [ 0.18, 0, 0.3 ], null, [ 0.125, 1, 1 ] ],
  			[ new Line( lineGeometry, matLineMagenta ), [ 0.3, 0, 0.18 ], [ 0, -Math.PI / 2, 0 ], [ 0.125, 1, 1 ] ]
  		]
  	};
  
  	var pickerTranslate = {
  		X: [
  			[ new Mesh( new CylinderBufferGeometry( 0.2, 0, 1, 4, 1, false ), matInvisible ), [ 0.6, 0, 0 ], [ 0, 0, -Math.PI / 2 ] ]
  		],
  		Y: [
  			[ new Mesh( new CylinderBufferGeometry( 0.2, 0, 1, 4, 1, false ), matInvisible ), [ 0, 0.6, 0 ] ]
  		],
  		Z: [
  			[ new Mesh( new CylinderBufferGeometry( 0.2, 0, 1, 4, 1, false ), matInvisible ), [ 0, 0, 0.6 ], [ Math.PI / 2, 0, 0 ] ]
  		],
  		XYZ: [
  			[ new Mesh( new OctahedronBufferGeometry( 0.2, 0 ), matInvisible ) ]
  		],
  		XY: [
  			[ new Mesh( new PlaneBufferGeometry( 0.4, 0.4 ), matInvisible ), [ 0.2, 0.2, 0 ] ]
  		],
  		YZ: [
  			[ new Mesh( new PlaneBufferGeometry( 0.4, 0.4 ), matInvisible ), [ 0, 0.2, 0.2 ], [ 0, Math.PI / 2, 0 ] ]
  		],
  		XZ: [
  			[ new Mesh( new PlaneBufferGeometry( 0.4, 0.4 ), matInvisible ), [ 0.2, 0, 0.2 ], [ -Math.PI / 2, 0, 0 ] ]
  		]
  	};
  
  	var helperTranslate = {
  		START: [
  			[ new Mesh( new OctahedronBufferGeometry( 0.01, 2 ), matHelper ), null, null, null, 'helper' ]
  		],
  		END: [
  			[ new Mesh( new OctahedronBufferGeometry( 0.01, 2 ), matHelper ), null, null, null, 'helper' ]
  		],
  		DELTA: [
  			[ new Line( TranslateHelperGeometry(), matHelper ), null, null, null, 'helper' ]
  		],
  		X: [
  			[ new Line( lineGeometry, matHelper.clone() ), [ -1e3, 0, 0 ], null, [ 1e6, 1, 1 ], 'helper' ]
  		],
  		Y: [
  			[ new Line( lineGeometry, matHelper.clone() ), [ 0, -1e3, 0 ], [ 0, 0, Math.PI / 2 ], [ 1e6, 1, 1 ], 'helper' ]
  		],
  		Z: [
  			[ new Line( lineGeometry, matHelper.clone() ), [ 0, 0, -1e3 ], [ 0, -Math.PI / 2, 0 ], [ 1e6, 1, 1 ], 'helper' ]
  		]
  	};
  
  	var gizmoRotate = {
  		X: [
  			[ new Line( CircleGeometry( 1, 0.5 ), matLineRed ) ],
  			[ new Mesh( new OctahedronBufferGeometry( 0.04, 0 ), matRed ), [ 0, 0, 0.99 ], null, [ 1, 3, 1 ] ],
  		],
  		Y: [
  			[ new Line( CircleGeometry( 1, 0.5 ), matLineGreen ), null, [ 0, 0, -Math.PI / 2 ] ],
  			[ new Mesh( new OctahedronBufferGeometry( 0.04, 0 ), matGreen ), [ 0, 0, 0.99 ], null, [ 3, 1, 1 ] ],
  		],
  		Z: [
  			[ new Line( CircleGeometry( 1, 0.5 ), matLineBlue ), null, [ 0, Math.PI / 2, 0 ] ],
  			[ new Mesh( new OctahedronBufferGeometry( 0.04, 0 ), matBlue ), [ 0.99, 0, 0 ], null, [ 1, 3, 1 ] ],
  		],
  		E: [
  			[ new Line( CircleGeometry( 1.25, 1 ), matLineYellowTransparent ), null, [ 0, Math.PI / 2, 0 ] ],
  			[ new Mesh( new CylinderBufferGeometry( 0.03, 0, 0.15, 4, 1, false ), matLineYellowTransparent ), [ 1.17, 0, 0 ], [ 0, 0, -Math.PI / 2 ], [ 1, 1, 0.001 ]],
  			[ new Mesh( new CylinderBufferGeometry( 0.03, 0, 0.15, 4, 1, false ), matLineYellowTransparent ), [ -1.17, 0, 0 ], [ 0, 0, Math.PI / 2 ], [ 1, 1, 0.001 ]],
  			[ new Mesh( new CylinderBufferGeometry( 0.03, 0, 0.15, 4, 1, false ), matLineYellowTransparent ), [ 0, -1.17, 0 ], [ Math.PI, 0, 0 ], [ 1, 1, 0.001 ]],
  			[ new Mesh( new CylinderBufferGeometry( 0.03, 0, 0.15, 4, 1, false ), matLineYellowTransparent ), [ 0, 1.17, 0 ], [ 0, 0, 0 ], [ 1, 1, 0.001 ]],
  		],
  		XYZE: [
  			[ new Line( CircleGeometry( 1, 1 ), matLineGray ), null, [ 0, Math.PI / 2, 0 ] ]
  		]
  	};
  
  	var helperRotate = {
  		AXIS: [
  			[ new Line( lineGeometry, matHelper.clone() ), [ -1e3, 0, 0 ], null, [ 1e6, 1, 1 ], 'helper' ]
  		]
  	};
  
  	var pickerRotate = {
  		X: [
  			[ new Mesh( new TorusBufferGeometry( 1, 0.1, 4, 24 ), matInvisible ), [ 0, 0, 0 ], [ 0, -Math.PI / 2, -Math.PI / 2 ] ],
  		],
  		Y: [
  			[ new Mesh( new TorusBufferGeometry( 1, 0.1, 4, 24 ), matInvisible ), [ 0, 0, 0 ], [ Math.PI / 2, 0, 0 ] ],
  		],
  		Z: [
  			[ new Mesh( new TorusBufferGeometry( 1, 0.1, 4, 24 ), matInvisible ), [ 0, 0, 0 ], [ 0, 0, -Math.PI / 2 ] ],
  		],
  		E: [
  			[ new Mesh( new TorusBufferGeometry( 1.25, 0.1, 2, 24 ), matInvisible ) ]
  		],
  		XYZE: [
  			[ new Mesh( new SphereBufferGeometry( 0.7, 10, 8 ), matInvisible ) ]
  		]
  	};
  
  	var gizmoScale = {
  		X: [
  			[ new Mesh( scaleHandleGeometry, matRed ), [ 0.8, 0, 0 ], [ 0, 0, -Math.PI / 2 ] ],
  			[ new Line( lineGeometry, matLineRed ), null, null, [ 0.8, 1, 1 ] ]
  		],
  		Y: [
  			[ new Mesh( scaleHandleGeometry, matGreen ), [ 0, 0.8, 0 ] ],
  			[ new Line( lineGeometry, matLineGreen ), null, [ 0, 0, Math.PI / 2 ], [ 0.8, 1, 1 ] ]
  		],
  		Z: [
  			[ new Mesh( scaleHandleGeometry, matBlue ), [ 0, 0, 0.8 ], [ Math.PI / 2, 0, 0 ] ],
  			[ new Line( lineGeometry, matLineBlue ), null, [ 0, -Math.PI / 2, 0 ], [ 0.8, 1, 1 ] ]
  		],
  		XY: [
  			[ new Mesh( scaleHandleGeometry, matYellowTransparent ), [ 0.85, 0.85, 0 ], null, [ 2, 2, 0.2 ] ],
  			[ new Line( lineGeometry, matLineYellow ), [ 0.855, 0.98, 0 ], null, [ 0.125, 1, 1 ] ],
  			[ new Line( lineGeometry, matLineYellow ), [ 0.98, 0.855, 0 ], [ 0, 0, Math.PI / 2 ], [ 0.125, 1, 1 ] ]
  		],
  		YZ: [
  			[ new Mesh( scaleHandleGeometry, matCyanTransparent ), [ 0, 0.85, 0.85 ], null, [ 0.2, 2, 2 ] ],
  			[ new Line( lineGeometry, matLineCyan ), [ 0, 0.855, 0.98 ], [ 0, 0, Math.PI / 2 ], [ 0.125, 1, 1 ] ],
  			[ new Line( lineGeometry, matLineCyan ), [ 0, 0.98, 0.855 ], [ 0, -Math.PI / 2, 0 ], [ 0.125, 1, 1 ] ]
  		],
  		XZ: [
  			[ new Mesh( scaleHandleGeometry, matMagentaTransparent ), [ 0.85, 0, 0.85 ], null, [ 2, 0.2, 2 ] ],
  			[ new Line( lineGeometry, matLineMagenta ), [ 0.855, 0, 0.98 ], null, [ 0.125, 1, 1 ] ],
  			[ new Line( lineGeometry, matLineMagenta ), [ 0.98, 0, 0.855 ], [ 0, -Math.PI / 2, 0 ], [ 0.125, 1, 1 ] ]
  		],
  		XYZX: [
  			[ new Mesh( new BoxBufferGeometry( 0.125, 0.125, 0.125 ), matWhiteTransperent ), [ 1.1, 0, 0 ] ],
  		],
  		XYZY: [
  			[ new Mesh( new BoxBufferGeometry( 0.125, 0.125, 0.125 ), matWhiteTransperent ), [ 0, 1.1, 0 ] ],
  		],
  		XYZZ: [
  			[ new Mesh( new BoxBufferGeometry( 0.125, 0.125, 0.125 ), matWhiteTransperent ), [ 0, 0, 1.1 ] ],
  		]
  	};
  
  	var pickerScale = {
  		X: [
  			[ new Mesh( new CylinderBufferGeometry( 0.2, 0, 0.8, 4, 1, false ), matInvisible ), [ 0.5, 0, 0 ], [ 0, 0, -Math.PI / 2 ] ]
  		],
  		Y: [
  			[ new Mesh( new CylinderBufferGeometry( 0.2, 0, 0.8, 4, 1, false ), matInvisible ), [ 0, 0.5, 0 ] ]
  		],
  		Z: [
  			[ new Mesh( new CylinderBufferGeometry( 0.2, 0, 0.8, 4, 1, false ), matInvisible ), [ 0, 0, 0.5 ], [ Math.PI / 2, 0, 0 ] ]
  		],
  		XY: [
  			[ new Mesh( scaleHandleGeometry, matInvisible ), [ 0.85, 0.85, 0 ], null, [ 3, 3, 0.2 ] ],
  		],
  		YZ: [
  			[ new Mesh( scaleHandleGeometry, matInvisible ), [ 0, 0.85, 0.85 ], null, [ 0.2, 3, 3 ] ],
  		],
  		XZ: [
  			[ new Mesh( scaleHandleGeometry, matInvisible ), [ 0.85, 0, 0.85 ], null, [ 3, 0.2, 3 ] ],
  		],
  		XYZX: [
  			[ new Mesh( new BoxBufferGeometry( 0.2, 0.2, 0.2 ), matInvisible ), [ 1.1, 0, 0 ] ],
  		],
  		XYZY: [
  			[ new Mesh( new BoxBufferGeometry( 0.2, 0.2, 0.2 ), matInvisible ), [ 0, 1.1, 0 ] ],
  		],
  		XYZZ: [
  			[ new Mesh( new BoxBufferGeometry( 0.2, 0.2, 0.2 ), matInvisible ), [ 0, 0, 1.1 ] ],
  		]
  	};
  
  	var helperScale = {
  		X: [
  			[ new Line( lineGeometry, matHelper.clone() ), [ -1e3, 0, 0 ], null, [ 1e6, 1, 1 ], 'helper' ]
  		],
  		Y: [
  			[ new Line( lineGeometry, matHelper.clone() ), [ 0, -1e3, 0 ], [ 0, 0, Math.PI / 2 ], [ 1e6, 1, 1 ], 'helper' ]
  		],
  		Z: [
  			[ new Line( lineGeometry, matHelper.clone() ), [ 0, 0, -1e3 ], [ 0, -Math.PI / 2, 0 ], [ 1e6, 1, 1 ], 'helper' ]
  		]
  	};
  
  	// Creates an Object3D with gizmos described in custom hierarchy definition.
  
  	var setupGizmo = function( gizmoMap ) {
  
  		var gizmo = new Object3D();
  
  		for ( var name in gizmoMap ) {
  
  			for ( var i = gizmoMap[ name ].length; i --; ) {
  
  				var object = gizmoMap[ name ][ i ][ 0 ].clone();
  				var position = gizmoMap[ name ][ i ][ 1 ];
  				var rotation = gizmoMap[ name ][ i ][ 2 ];
  				var scale = gizmoMap[ name ][ i ][ 3 ];
  				var tag = gizmoMap[ name ][ i ][ 4 ];
  
  				// name and tag properties are essential for picking and updating logic.
  				object.name = name;
  				object.tag = tag;
  
  				if (position) {
  					object.position.set(position[ 0 ], position[ 1 ], position[ 2 ]);
  				}
  				if (rotation) {
  					object.rotation.set(rotation[ 0 ], rotation[ 1 ], rotation[ 2 ]);
  				}
  				if (scale) {
  					object.scale.set(scale[ 0 ], scale[ 1 ], scale[ 2 ]);
  				}
  
  				object.updateMatrix();
  
  				var tempGeometry = object.geometry.clone();
  				tempGeometry.applyMatrix(object.matrix);
  				object.geometry = tempGeometry;
  
  				object.position.set( 0, 0, 0 );
  				object.rotation.set( 0, 0, 0 );
  				object.scale.set(1, 1, 1);
  
  				gizmo.add(object);
  
  			}
  
  		}
  
  		return gizmo;
  
  	};
  
  	// Reusable utility variables
  
  	var tempVector = new Vector3( 0, 0, 0 );
  	var tempEuler = new Euler();
  	var alignVector = new Vector3( 0, 1, 0 );
  	var zeroVector = new Vector3( 0, 0, 0 );
  	var lookAtMatrix = new Matrix4();
  	var tempQuaternion = new Quaternion();
  	var tempQuaternion2 = new Quaternion();
  	var identityQuaternion = new Quaternion();
  
  	var unitX = new Vector3( 1, 0, 0 );
  	var unitY = new Vector3( 0, 1, 0 );
  	var unitZ = new Vector3( 0, 0, 1 );
  
  	// Gizmo creation
  
  	this.gizmo = {};
  	this.picker = {};
  	this.helper = {};
  
  	this.add( this.gizmo[ "translate" ] = setupGizmo( gizmoTranslate ) );
  	this.add( this.gizmo[ "rotate" ] = setupGizmo( gizmoRotate ) );
  	this.add( this.gizmo[ "scale" ] = setupGizmo( gizmoScale ) );
  	this.add( this.picker[ "translate" ] = setupGizmo( pickerTranslate ) );
  	this.add( this.picker[ "rotate" ] = setupGizmo( pickerRotate ) );
  	this.add( this.picker[ "scale" ] = setupGizmo( pickerScale ) );
  	this.add( this.helper[ "translate" ] = setupGizmo( helperTranslate ) );
  	this.add( this.helper[ "rotate" ] = setupGizmo( helperRotate ) );
  	this.add( this.helper[ "scale" ] = setupGizmo( helperScale ) );
  
  	// Pickers should be hidden always
  
  	this.picker[ "translate" ].visible = false;
  	this.picker[ "rotate" ].visible = false;
  	this.picker[ "scale" ].visible = false;
  
  	// updateMatrixWorld will update transformations and appearance of individual handles
  
  	this.updateMatrixWorld = function () {
  
  		var space = this.space;
  
  		if ( this.mode === 'scale' ) space = 'local'; // scale always oriented to local rotation
  
  		var quaternion = space === "local" ? this.worldQuaternion : identityQuaternion;
  
  		// Show only gizmos for current transform mode
  
  		this.gizmo[ "translate" ].visible = this.mode === "translate";
  		this.gizmo[ "rotate" ].visible = this.mode === "rotate";
  		this.gizmo[ "scale" ].visible = this.mode === "scale";
  
  		this.helper[ "translate" ].visible = this.mode === "translate";
  		this.helper[ "rotate" ].visible = this.mode === "rotate";
  		this.helper[ "scale" ].visible = this.mode === "scale";
  		var handles = [];
  		handles = handles.concat( this.picker[ this.mode ].children );
  		handles = handles.concat( this.gizmo[ this.mode ].children );
  		handles = handles.concat( this.helper[ this.mode ].children );
  
  		for ( var i = 0; i < handles.length; i++ ) {
  
  			var handle = handles[i];
  
  			// hide aligned to camera
  
  			handle.visible = true;
  			handle.rotation.set( 0, 0, 0 );
  			handle.position.copy( this.worldPosition );
  
  			var eyeDistance = this.worldPosition.distanceTo( this.cameraPosition);
  			handle.scale.set( 1, 1, 1 ).multiplyScalar( eyeDistance * this.size / 7 );
  
  			// TODO: simplify helpers and consider decoupling from gizmo
  
  			if ( handle.tag === 'helper' ) {
  
  				handle.visible = false;
  
  				if ( handle.name === 'AXIS' ) {
  
  					handle.position.copy( this.worldPositionStart );
  					handle.visible = !!this.axis;
  
  					if ( this.axis === 'X' ) {
  
  						tempQuaternion.setFromEuler( tempEuler.set( 0, 0, 0 ) );
  						handle.quaternion.copy( quaternion ).multiply( tempQuaternion );
  
  						if ( Math.abs( alignVector.copy( unitX ).applyQuaternion( quaternion ).dot( this.eye ) ) > 0.9 ) {
  							handle.visible = false;
  						}
  
  					}
  
  					if ( this.axis === 'Y' ) {
  
  						tempQuaternion.setFromEuler( tempEuler.set( 0, 0, Math.PI / 2 ) );
  						handle.quaternion.copy( quaternion ).multiply( tempQuaternion );
  
  						if ( Math.abs( alignVector.copy( unitY ).applyQuaternion( quaternion ).dot( this.eye ) ) > 0.9 ) {
  							handle.visible = false;
  						}
  
  					}
  
  					if ( this.axis === 'Z' ) {
  
  						tempQuaternion.setFromEuler( tempEuler.set( 0, Math.PI / 2, 0 ) );
  						handle.quaternion.copy( quaternion ).multiply( tempQuaternion );
  
  						if ( Math.abs( alignVector.copy( unitZ ).applyQuaternion( quaternion ).dot( this.eye ) ) > 0.9 ) {
  							handle.visible = false;
  						}
  
  					}
  
  					if ( this.axis === 'XYZE' ) {
  
  						tempQuaternion.setFromEuler( tempEuler.set( 0, Math.PI / 2, 0 ) );
  						alignVector.copy( this.rotationAxis );
  						handle.quaternion.setFromRotationMatrix( lookAtMatrix.lookAt( zeroVector, alignVector, unitY ) );
  						handle.quaternion.multiply( tempQuaternion );
  						handle.visible = this.dragging;
  
  					}
  
  					if ( this.axis === 'E' ) {
  
  						handle.visible = false;
  
  					}
  				} else if ( handle.name === 'START' ) {
  
  					handle.position.copy( this.worldPositionStart );
  					handle.visible = this.dragging;
  
  				} else if ( handle.name === 'END' ) {
  
  					handle.position.copy( this.worldPosition );
  					handle.visible = this.dragging;
  
  				} else if ( handle.name === 'DELTA' ) {
  
  					handle.position.copy( this.worldPositionStart );
  					handle.quaternion.copy( this.worldQuaternionStart );
  					tempVector.set( 1e-10, 1e-10, 1e-10 ).add( this.worldPositionStart ).sub( this.worldPosition ).multiplyScalar( -1 );
  					tempVector.applyQuaternion( this.worldQuaternionStart.clone().inverse() );
  					handle.scale.copy( tempVector );
  					handle.visible = this.dragging;
  
  				} else {
  
  					handle.quaternion.copy( quaternion );
  
  					if ( this.dragging ) {
  
  						handle.position.copy( this.worldPositionStart );
  
  					} else {
  
  						handle.position.copy( this.worldPosition );
  
  					}
  
  					if ( this.axis ) {
  
  						handle.visible = this.axis.search( handle.name ) !== -1;
  
  					}
  
  				}
  
  				// If updating helper, skip rest of the loop
  				continue;
  
  			}
  
  			// Align handles to current local or world rotation
  
  			handle.quaternion.copy( quaternion );
  
  			if ( this.mode === 'translate' || this.mode === 'scale' ) {
  
  				// Hide translate and scale axis facing the camera
  
  				var AXIS_HIDE_TRESHOLD = 0.99;
  				var PLANE_HIDE_TRESHOLD = 0.2;
  				var AXIS_FLIP_TRESHOLD = -0.4;
  				if ( handle.name === 'X' || handle.name === 'XYZX' ) {
  					if ( Math.abs( alignVector.copy( unitX ).applyQuaternion( quaternion ).dot( this.eye ) ) > AXIS_HIDE_TRESHOLD ) {
  						handle.scale.set( 1e-10, 1e-10, 1e-10 );
  						handle.visible = false;
  					}
  				}
  				if ( handle.name === 'Y' || handle.name === 'XYZY' ) {
  					if ( Math.abs( alignVector.copy( unitY ).applyQuaternion( quaternion ).dot( this.eye ) ) > AXIS_HIDE_TRESHOLD ) {
  						handle.scale.set( 1e-10, 1e-10, 1e-10 );
  						handle.visible = false;
  					}
  				}
  				if ( handle.name === 'Z' || handle.name === 'XYZZ' ) {
  					if ( Math.abs( alignVector.copy( unitZ ).applyQuaternion( quaternion ).dot( this.eye ) ) > AXIS_HIDE_TRESHOLD ) {
  						handle.scale.set( 1e-10, 1e-10, 1e-10 );
  						handle.visible = false;
  					}
  				}
  				if ( handle.name === 'XY' ) {
  					if ( Math.abs( alignVector.copy( unitZ ).applyQuaternion( quaternion ).dot( this.eye ) ) < PLANE_HIDE_TRESHOLD ) {
  						handle.scale.set( 1e-10, 1e-10, 1e-10 );
  						handle.visible = false;
  					}
  				}
  				if ( handle.name === 'YZ' ) {
  					if ( Math.abs( alignVector.copy( unitX ).applyQuaternion( quaternion ).dot( this.eye ) ) < PLANE_HIDE_TRESHOLD ) {
  						handle.scale.set( 1e-10, 1e-10, 1e-10 );
  						handle.visible = false;
  					}
  				}
  				if ( handle.name === 'XZ' ) {
  					if ( Math.abs( alignVector.copy( unitY ).applyQuaternion( quaternion ).dot( this.eye ) ) < PLANE_HIDE_TRESHOLD ) {
  						handle.scale.set( 1e-10, 1e-10, 1e-10 );
  						handle.visible = false;
  					}
  				}
  
  				// Flip translate and scale axis ocluded behind another axis
  
  				if ( handle.name.search( 'X' ) !== -1 ) {
  					if ( alignVector.copy( unitX ).applyQuaternion( quaternion ).dot( this.eye ) < AXIS_FLIP_TRESHOLD ) {
  						if ( handle.tag === 'fwd' ) {
  							handle.visible = false;
  						} else {
  							handle.scale.x *= -1;
  						}
  					} else if ( handle.tag === 'bwd' ) {
  						handle.visible = false;
  					}
  				}
  
  				if ( handle.name.search( 'Y' ) !== -1 ) {
  					if ( alignVector.copy( unitY ).applyQuaternion( quaternion ).dot( this.eye ) < AXIS_FLIP_TRESHOLD ) {
  						if ( handle.tag === 'fwd' ) {
  							handle.visible = false;
  						} else {
  							handle.scale.y *= -1;
  						}
  					} else if ( handle.tag === 'bwd' ) {
  						handle.visible = false;
  					}
  				}
  
  				if ( handle.name.search( 'Z' ) !== -1 ) {
  					if ( alignVector.copy( unitZ ).applyQuaternion( quaternion ).dot( this.eye ) < AXIS_FLIP_TRESHOLD ) {
  						if ( handle.tag === 'fwd' ) {
  							handle.visible = false;
  						} else {
  							handle.scale.z *= -1;
  						}
  					} else if ( handle.tag === 'bwd' ) {
  						handle.visible = false;
  					}
  				}
  
  			} else if ( this.mode === 'rotate' ) {
  
  				// Align handles to current local or world rotation
  
  				tempQuaternion2.copy( quaternion );
  				alignVector.copy( this.eye ).applyQuaternion( tempQuaternion.copy( quaternion ).inverse() );
  
  				if ( handle.name.search( "E" ) !== - 1 ) {
  
  					handle.quaternion.setFromRotationMatrix( lookAtMatrix.lookAt( this.eye, zeroVector, unitY ) );
  
  				}
  
  				if ( handle.name === 'X' ) {
  
  					tempQuaternion.setFromAxisAngle( unitX, Math.atan2( -alignVector.y, alignVector.z ) );
  					tempQuaternion.multiplyQuaternions( tempQuaternion2, tempQuaternion );
  					handle.quaternion.copy( tempQuaternion );
  
  				}
  
  				if ( handle.name === 'Y' ) {
  
  					tempQuaternion.setFromAxisAngle( unitY, Math.atan2( alignVector.x, alignVector.z ) );
  					tempQuaternion.multiplyQuaternions( tempQuaternion2, tempQuaternion );
  					handle.quaternion.copy( tempQuaternion );
  
  				}
  
  				if ( handle.name === 'Z' ) {
  
  					tempQuaternion.setFromAxisAngle( unitZ, Math.atan2( alignVector.y, alignVector.x ) );
  					tempQuaternion.multiplyQuaternions( tempQuaternion2, tempQuaternion );
  					handle.quaternion.copy( tempQuaternion );
  
  				}
  
  			}
  
  			// Hide disabled axes
  			handle.visible = handle.visible && ( handle.name.indexOf( "X" ) === -1 || this.showX );
  			handle.visible = handle.visible && ( handle.name.indexOf( "Y" ) === -1 || this.showY );
  			handle.visible = handle.visible && ( handle.name.indexOf( "Z" ) === -1 || this.showZ );
  			handle.visible = handle.visible && ( handle.name.indexOf( "E" ) === -1 || ( this.showX && this.showY && this.showZ ) );
  
  			// highlight selected axis
  
  			handle.material._opacity = handle.material._opacity || handle.material.opacity;
  			handle.material._color = handle.material._color || handle.material.color.clone();
  
  			handle.material.color.copy( handle.material._color );
  			handle.material.opacity = handle.material._opacity;
  
  			if ( !this.enabled ) {
  
  				handle.material.opacity *= 0.5;
  				handle.material.color.lerp( new Color( 1, 1, 1 ), 0.5 );
  
  			} else if ( this.axis ) {
  
  				if ( handle.name === this.axis ) {
  
  					handle.material.opacity = 1.0;
  					handle.material.color.lerp( new Color( 1, 1, 1 ), 0.5 );
  
  				} else if ( this.axis.split('').some( function( a ) { return handle.name === a; } ) ) {
  
  					handle.material.opacity = 1.0;
  					handle.material.color.lerp( new Color( 1, 1, 1 ), 0.5 );
  
  				} else {
  
  					handle.material.opacity *= 0.25;
  					handle.material.color.lerp( new Color( 1, 1, 1 ), 0.5 );
  
  				}
  
  			}
  
  		}
  
  		Object3D.prototype.updateMatrixWorld.call( this );
  
  	};
  
  };
  
  TransformControlsGizmo.prototype = Object.assign( Object.create( Object3D.prototype ), {
  
  	constructor: TransformControlsGizmo,
  
  	isTransformControlsGizmo: true
  
  } );
  var TransformControlsPlane = function () {
  
  	'use strict';
  
  	Mesh.call( this,
  		new PlaneBufferGeometry( 100000, 100000, 2, 2 ),
  		new MeshBasicMaterial( { visible: false, wireframe: true, side: DoubleSide, transparent: true, opacity: 0.1 } )
  	);
  
  	this.type = 'TransformControlsPlane';
  
  	var unitX = new Vector3( 1, 0, 0 );
  	var unitY = new Vector3( 0, 1, 0 );
  	var unitZ = new Vector3( 0, 0, 1 );
  
  	var tempVector = new Vector3();
  	var dirVector = new Vector3();
  	var alignVector = new Vector3();
  	var tempMatrix = new Matrix4();
  	var identityQuaternion = new Quaternion();
  
  	this.updateMatrixWorld = function() {
  
  		var space = this.space;
  
  		this.position.copy( this.worldPosition );
  
  		if ( this.mode === 'scale' ) space = 'local'; // scale always oriented to local rotation
  
  		unitX.set( 1, 0, 0 ).applyQuaternion( space === "local" ? this.worldQuaternion : identityQuaternion );
  		unitY.set( 0, 1, 0 ).applyQuaternion( space === "local" ? this.worldQuaternion : identityQuaternion );
  		unitZ.set( 0, 0, 1 ).applyQuaternion( space === "local" ? this.worldQuaternion : identityQuaternion );
  
  		// Align the plane for current transform mode, axis and space.
  
  		alignVector.copy( unitY );
  
  		switch ( this.mode ) {
  			case 'translate':
  			case 'scale':
  				switch ( this.axis ) {
  					case 'X':
  						alignVector.copy( this.eye ).cross( unitX );
  						dirVector.copy( unitX ).cross( alignVector );
  						break;
  					case 'Y':
  						alignVector.copy( this.eye ).cross( unitY );
  						dirVector.copy( unitY ).cross( alignVector );
  						break;
  					case 'Z':
  						alignVector.copy( this.eye ).cross( unitZ );
  						dirVector.copy( unitZ ).cross( alignVector );
  						break;
  					case 'XY':
  						dirVector.copy( unitZ );
  						break;
  					case 'YZ':
  						dirVector.copy( unitX );
  						break;
  					case 'XZ':
  						alignVector.copy( unitZ );
  						dirVector.copy( unitY );
  						break;
  					case 'XYZ':
  					case 'E':
  						dirVector.set( 0, 0, 0 );
  						break;
  				}
  				break;
  			case 'rotate':
  			default:
  				// special case for rotate
  				dirVector.set( 0, 0, 0 );
  		}
  
  		if ( dirVector.length() === 0 ) {
  
  			// If in rotate mode, make the plane parallel to camera
  			this.quaternion.copy( this.cameraQuaternion );
  
  		} else {
  
  			tempMatrix.lookAt( tempVector.set( 0, 0, 0 ), dirVector, alignVector );
  
  			this.quaternion.setFromRotationMatrix( tempMatrix );
  
  		}
  
  		Object3D.prototype.updateMatrixWorld.call( this );
  
  	};
  
  };
  
  TransformControlsPlane.prototype = Object.assign( Object.create( Mesh.prototype ), {
  
  	constructor: TransformControlsPlane,
  
  	isTransformControlsPlane: true
  
  } );
  
  export {
  	TransformControls,
  	TransformControlsGizmo,
  	TransformControlsPlane
  }
  