three
Version: 
JavaScript 3D library
1,689 lines (1,086 loc) • 43.9 kB
JavaScript
import {
	BoxGeometry,
	BufferGeometry,
	Color,
	CylinderGeometry,
	DoubleSide,
	Euler,
	Float32BufferAttribute,
	Line,
	LineBasicMaterial,
	Matrix4,
	Mesh,
	MeshBasicMaterial,
	Object3D,
	OctahedronGeometry,
	PlaneGeometry,
	Quaternion,
	Raycaster,
	SphereGeometry,
	TorusGeometry,
	Vector3
} from '../../../build/three.module.js';
var TransformControls = function ( camera, domElement ) {
	if ( domElement === undefined ) {
		console.warn( 'THREE.TransformControls: The second parameter "domElement" is now mandatory.' );
		domElement = document;
	}
	Object3D.call( this );
	this.visible = false;
	this.domElement = domElement;
	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( 'scaleSnap', 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 raycaster = new Raycaster();
	function intersectObjectWithRay( object, raycaster, includeInvisible ) {
		var allIntersections = raycaster.intersectObject( object, true );
		for ( var i = 0; i < allIntersections.length; i ++ ) {
			if ( allIntersections[ i ].object.visible || includeInvisible ) {
				return allIntersections[ i ];
			}
		}
		return false;
	}
	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 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( 'pointerdown', onPointerDown );
		domElement.addEventListener( 'pointermove', onPointerHover );
		scope.domElement.ownerDocument.addEventListener( 'pointerup', onPointerUp );
	}
	this.dispose = function () {
		domElement.removeEventListener( 'pointerdown', onPointerDown );
		domElement.removeEventListener( 'pointermove', onPointerHover );
		scope.domElement.ownerDocument.removeEventListener( 'pointermove', onPointerMove );
		scope.domElement.ownerDocument.removeEventListener( 'pointerup', onPointerUp );
		this.traverse( function ( child ) {
			if ( child.geometry ) child.geometry.dispose();
			if ( child.material ) child.material.dispose();
		} );
	};
	// Set current object
	this.attach = function ( object ) {
		this.object = object;
		this.visible = true;
		return this;
	};
	// Detatch from object
	this.detach = function () {
		this.object = undefined;
		this.visible = false;
		this.axis = null;
		return this;
	};
	// 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();
			if ( this.object.parent === null ) {
				console.error( 'TransformControls: The attached 3D object must be a part of the scene graph.' );
			} else {
				this.object.parent.matrixWorld.decompose( parentPosition, parentQuaternion, parentScale );
			}
			this.object.matrixWorld.decompose( worldPosition, worldQuaternion, worldScale );
			parentQuaternionInv.copy( parentQuaternion ).invert();
			worldQuaternionInv.copy( worldQuaternion ).invert();
		}
		this.camera.updateMatrixWorld();
		this.camera.matrixWorld.decompose( cameraPosition, cameraQuaternion, cameraScale );
		eye.copy( cameraPosition ).sub( worldPosition ).normalize();
		Object3D.prototype.updateMatrixWorld.call( this );
	};
	this.pointerHover = function ( pointer ) {
		if ( this.object === undefined || this.dragging === true ) return;
		raycaster.setFromCamera( pointer, this.camera );
		var intersect = intersectObjectWithRay( _gizmo.picker[ this.mode ], raycaster );
		if ( intersect ) {
			this.axis = intersect.object.name;
		} else {
			this.axis = null;
		}
	};
	this.pointerDown = function ( pointer ) {
		if ( this.object === undefined || this.dragging === true || pointer.button !== 0 ) return;
		if ( this.axis !== null ) {
			raycaster.setFromCamera( pointer, this.camera );
			var planeIntersect = intersectObjectWithRay( _plane, raycaster, true );
			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 !== - 1 ) return;
		raycaster.setFromCamera( pointer, this.camera );
		var planeIntersect = intersectObjectWithRay( _plane, raycaster, true );
		if ( ! planeIntersect ) 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 ).invert() );
					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;
				_tempVector2.set( d, d, d );
			} else {
				_tempVector.copy( pointStart );
				_tempVector2.copy( pointEnd );
				_tempVector.applyQuaternion( worldQuaternionInv );
				_tempVector2.applyQuaternion( worldQuaternionInv );
				_tempVector2.divide( _tempVector );
				if ( axis.search( 'X' ) === - 1 ) {
					_tempVector2.x = 1;
				}
				if ( axis.search( 'Y' ) === - 1 ) {
					_tempVector2.y = 1;
				}
				if ( axis.search( 'Z' ) === - 1 ) {
					_tempVector2.z = 1;
				}
			}
			// Apply scale
			object.scale.copy( scaleStart ).multiply( _tempVector2 );
			if ( this.scaleSnap ) {
				if ( axis.search( 'X' ) !== - 1 ) {
					object.scale.x = Math.round( object.scale.x / this.scaleSnap ) * this.scaleSnap || this.scaleSnap;
				}
				if ( axis.search( 'Y' ) !== - 1 ) {
					object.scale.y = Math.round( object.scale.y / this.scaleSnap ) * this.scaleSnap || this.scaleSnap;
				}
				if ( axis.search( 'Z' ) !== - 1 ) {
					object.scale.z = Math.round( object.scale.z / this.scaleSnap ) * this.scaleSnap || this.scaleSnap;
				}
			}
		} 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 !== 0 ) return;
		if ( this.dragging && ( this.axis !== null ) ) {
			mouseUpEvent.mode = this.mode;
			this.dispatchEvent( mouseUpEvent );
		}
		this.dragging = false;
		this.axis = null;
	};
	// normalize mouse / touch pointer and remap {x,y} to view space.
	function getPointer( event ) {
		if ( scope.domElement.ownerDocument.pointerLockElement ) {
			return {
				x: 0,
				y: 0,
				button: event.button
			};
		} else {
			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;
		switch ( event.pointerType ) {
			case 'mouse':
			case 'pen':
				scope.pointerHover( getPointer( event ) );
				break;
		}
	}
	function onPointerDown( event ) {
		if ( ! scope.enabled ) return;
		scope.domElement.style.touchAction = 'none'; // disable touch scroll
		scope.domElement.ownerDocument.addEventListener( 'pointermove', onPointerMove );
		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;
		scope.domElement.style.touchAction = '';
		scope.domElement.ownerDocument.removeEventListener( 'pointermove', onPointerMove );
		scope.pointerUp( getPointer( event ) );
	}
	// TODO: deprecate
	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.setScaleSnap = function ( scaleSnap ) {
		scope.scaleSnap = scaleSnap;
	};
	this.setSize = function ( size ) {
		scope.size = size;
	};
	this.setSpace = function ( space ) {
		scope.space = space;
	};
	this.update = function () {
		console.warn( 'THREE.TransformControls: update function has no more functionality and therefore has been deprecated.' );
	};
};
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,
		toneMapped: false
	} );
	var gizmoLineMaterial = new LineBasicMaterial( {
		depthTest: false,
		depthWrite: false,
		transparent: true,
		linewidth: 1,
		fog: false,
		toneMapped: 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 matWhiteTransparent = gizmoMaterial.clone();
	matWhiteTransparent.opacity = 0.25;
	var matYellowTransparent = matWhiteTransparent.clone();
	matYellowTransparent.color.set( 0xffff00 );
	var matCyanTransparent = matWhiteTransparent.clone();
	matCyanTransparent.color.set( 0x00ffff );
	var matMagentaTransparent = matWhiteTransparent.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 CylinderGeometry( 0, 0.05, 0.2, 12, 1, false );
	var scaleHandleGeometry = new BoxGeometry( 0.125, 0.125, 0.125 );
	var lineGeometry = new BufferGeometry();
	lineGeometry.setAttribute( '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.setAttribute( '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 () {
		var geometry = new BufferGeometry();
		geometry.setAttribute( '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 OctahedronGeometry( 0.1, 0 ), matWhiteTransparent.clone() ), [ 0, 0, 0 ], [ 0, 0, 0 ]]
		],
		XY: [
			[ new Mesh( new PlaneGeometry( 0.295, 0.295 ), matYellowTransparent.clone() ), [ 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 PlaneGeometry( 0.295, 0.295 ), matCyanTransparent.clone() ), [ 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 PlaneGeometry( 0.295, 0.295 ), matMagentaTransparent.clone() ), [ 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 CylinderGeometry( 0.2, 0, 1, 4, 1, false ), matInvisible ), [ 0.6, 0, 0 ], [ 0, 0, - Math.PI / 2 ]]
		],
		Y: [
			[ new Mesh( new CylinderGeometry( 0.2, 0, 1, 4, 1, false ), matInvisible ), [ 0, 0.6, 0 ]]
		],
		Z: [
			[ new Mesh( new CylinderGeometry( 0.2, 0, 1, 4, 1, false ), matInvisible ), [ 0, 0, 0.6 ], [ Math.PI / 2, 0, 0 ]]
		],
		XYZ: [
			[ new Mesh( new OctahedronGeometry( 0.2, 0 ), matInvisible ) ]
		],
		XY: [
			[ new Mesh( new PlaneGeometry( 0.4, 0.4 ), matInvisible ), [ 0.2, 0.2, 0 ]]
		],
		YZ: [
			[ new Mesh( new PlaneGeometry( 0.4, 0.4 ), matInvisible ), [ 0, 0.2, 0.2 ], [ 0, Math.PI / 2, 0 ]]
		],
		XZ: [
			[ new Mesh( new PlaneGeometry( 0.4, 0.4 ), matInvisible ), [ 0.2, 0, 0.2 ], [ - Math.PI / 2, 0, 0 ]]
		]
	};
	var helperTranslate = {
		START: [
			[ new Mesh( new OctahedronGeometry( 0.01, 2 ), matHelper ), null, null, null, 'helper' ]
		],
		END: [
			[ new Mesh( new OctahedronGeometry( 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 OctahedronGeometry( 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 OctahedronGeometry( 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 OctahedronGeometry( 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 CylinderGeometry( 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 CylinderGeometry( 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 CylinderGeometry( 0.03, 0, 0.15, 4, 1, false ), matLineYellowTransparent ), [ 0, - 1.17, 0 ], [ Math.PI, 0, 0 ], [ 1, 1, 0.001 ]],
			[ new Mesh( new CylinderGeometry( 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 TorusGeometry( 1, 0.1, 4, 24 ), matInvisible ), [ 0, 0, 0 ], [ 0, - Math.PI / 2, - Math.PI / 2 ]],
		],
		Y: [
			[ new Mesh( new TorusGeometry( 1, 0.1, 4, 24 ), matInvisible ), [ 0, 0, 0 ], [ Math.PI / 2, 0, 0 ]],
		],
		Z: [
			[ new Mesh( new TorusGeometry( 1, 0.1, 4, 24 ), matInvisible ), [ 0, 0, 0 ], [ 0, 0, - Math.PI / 2 ]],
		],
		E: [
			[ new Mesh( new TorusGeometry( 1.25, 0.1, 2, 24 ), matInvisible ) ]
		],
		XYZE: [
			[ new Mesh( new SphereGeometry( 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 BoxGeometry( 0.125, 0.125, 0.125 ), matWhiteTransparent.clone() ), [ 1.1, 0, 0 ]],
		],
		XYZY: [
			[ new Mesh( new BoxGeometry( 0.125, 0.125, 0.125 ), matWhiteTransparent.clone() ), [ 0, 1.1, 0 ]],
		],
		XYZZ: [
			[ new Mesh( new BoxGeometry( 0.125, 0.125, 0.125 ), matWhiteTransparent.clone() ), [ 0, 0, 1.1 ]],
		]
	};
	var pickerScale = {
		X: [
			[ new Mesh( new CylinderGeometry( 0.2, 0, 0.8, 4, 1, false ), matInvisible ), [ 0.5, 0, 0 ], [ 0, 0, - Math.PI / 2 ]]
		],
		Y: [
			[ new Mesh( new CylinderGeometry( 0.2, 0, 0.8, 4, 1, false ), matInvisible ), [ 0, 0.5, 0 ]]
		],
		Z: [
			[ new Mesh( new CylinderGeometry( 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 BoxGeometry( 0.2, 0.2, 0.2 ), matInvisible ), [ 1.1, 0, 0 ]],
		],
		XYZY: [
			[ new Mesh( new BoxGeometry( 0.2, 0.2, 0.2 ), matInvisible ), [ 0, 1.1, 0 ]],
		],
		XYZZ: [
			[ new Mesh( new BoxGeometry( 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.applyMatrix4( object.matrix );
				object.geometry = tempGeometry;
				object.renderOrder = Infinity;
				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 factor;
			if ( this.camera.isOrthographicCamera ) {
				factor = ( this.camera.top - this.camera.bottom ) / this.camera.zoom;
			} else {
				factor = this.worldPosition.distanceTo( this.cameraPosition ) * Math.min( 1.9 * Math.tan( Math.PI * this.camera.fov / 360 ) / this.camera.zoom, 7 );
			}
			handle.scale.set( 1, 1, 1 ).multiplyScalar( factor * 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().invert() );
					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 = 0.0;
				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 ).invert() );
				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 PlaneGeometry( 100000, 100000, 2, 2 ),
		new MeshBasicMaterial( { visible: false, wireframe: true, side: DoubleSide, transparent: true, opacity: 0.1, toneMapped: false } )
	);
	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 };