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import {
	BoxGeometry,
	BufferGeometry,
	Controls,
	CylinderGeometry,
	DoubleSide,
	Euler,
	Float32BufferAttribute,
	Line,
	LineBasicMaterial,
	Matrix4,
	Mesh,
	MeshBasicMaterial,
	Object3D,
	OctahedronGeometry,
	PlaneGeometry,
	Quaternion,
	Raycaster,
	SphereGeometry,
	TorusGeometry,
	Vector3
} from 'three';

const _raycaster = new Raycaster();

const _tempVector = new Vector3();
const _tempVector2 = new Vector3();
const _tempQuaternion = new Quaternion();
const _unit = {
	X: new Vector3( 1, 0, 0 ),
	Y: new Vector3( 0, 1, 0 ),
	Z: new Vector3( 0, 0, 1 )
};

class TransformControls extends Controls {

constructor( camera, domElement = null ) {

super( undefined, domElement );

const root = new TransformControlsRoot( this );
		this._root = root;

const gizmo = new TransformControlsGizmo();
		this._gizmo = gizmo;
		root.add( gizmo );

const plane = new TransformControlsPlane();
		this._plane = plane;
		root.add( plane );

const scope = this;

// Defined getter, setter and store for a property
		function defineProperty( propName, defaultValue ) {

let 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;

}

// 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 );
		defineProperty( 'minX', - Infinity );
		defineProperty( 'maxX', Infinity );
		defineProperty( 'minY', - Infinity );
		defineProperty( 'maxY', Infinity );
		defineProperty( 'minZ', - Infinity );
		defineProperty( 'maxZ', Infinity );

// Reusable utility variables

const worldPosition = new Vector3();
		const worldPositionStart = new Vector3();
		const worldQuaternion = new Quaternion();
		const worldQuaternionStart = new Quaternion();
		const cameraPosition = new Vector3();
		const cameraQuaternion = new Quaternion();
		const pointStart = new Vector3();
		const pointEnd = new Vector3();
		const rotationAxis = new Vector3();
		const rotationAngle = 0;
		const eye = 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 );

this._offset = new Vector3();
		this._startNorm = new Vector3();
		this._endNorm = new Vector3();
		this._cameraScale = new Vector3();

this._parentPosition = new Vector3();
		this._parentQuaternion = new Quaternion();
		this._parentQuaternionInv = new Quaternion();
		this._parentScale = new Vector3();

this._worldScaleStart = new Vector3();
		this._worldQuaternionInv = new Quaternion();
		this._worldScale = new Vector3();

this._positionStart = new Vector3();
		this._quaternionStart = new Quaternion();
		this._scaleStart = new Vector3();

this._getPointer = getPointer.bind( this );
		this._onPointerDown = onPointerDown.bind( this );
		this._onPointerHover = onPointerHover.bind( this );
		this._onPointerMove = onPointerMove.bind( this );
		this._onPointerUp = onPointerUp.bind( this );

if ( domElement !== null ) {

this.connect();

}

connect() {

this.domElement.addEventListener( 'pointerdown', this._onPointerDown );
		this.domElement.addEventListener( 'pointermove', this._onPointerHover );
		this.domElement.addEventListener( 'pointerup', this._onPointerUp );

this.domElement.style.touchAction = 'none'; // disable touch scroll

}

disconnect() {

this.domElement.removeEventListener( 'pointerdown', this._onPointerDown );
		this.domElement.removeEventListener( 'pointermove', this._onPointerHover );
		this.domElement.removeEventListener( 'pointermove', this._onPointerMove );
		this.domElement.removeEventListener( 'pointerup', this._onPointerUp );

this.domElement.style.touchAction = 'auto';

}

getHelper() {

return this._root;

}

pointerHover( pointer ) {

if ( this.object === undefined || this.dragging === true ) return;

if ( pointer !== null ) _raycaster.setFromCamera( pointer, this.camera );

const intersect = intersectObjectWithRay( this._gizmo.picker[ this.mode ], _raycaster );

if ( intersect ) {

this.axis = intersect.object.name;

} else {

this.axis = null;

}

pointerDown( pointer ) {

if ( this.object === undefined || this.dragging === true || ( pointer != null && pointer.button !== 0 ) ) return;

if ( this.axis !== null ) {

if ( pointer !== null ) _raycaster.setFromCamera( pointer, this.camera );

const planeIntersect = intersectObjectWithRay( this._plane, _raycaster, true );

if ( planeIntersect ) {

this.object.updateMatrixWorld();
				this.object.parent.updateMatrixWorld();

this._positionStart.copy( this.object.position );
				this._quaternionStart.copy( this.object.quaternion );
				this._scaleStart.copy( this.object.scale );

this.object.matrixWorld.decompose( this.worldPositionStart, this.worldQuaternionStart, this._worldScaleStart );

this.pointStart.copy( planeIntersect.point ).sub( this.worldPositionStart );

}

this.dragging = true;
			_mouseDownEvent.mode = this.mode;
			this.dispatchEvent( _mouseDownEvent );

}

pointerMove( pointer ) {

const axis = this.axis;
		const mode = this.mode;
		const object = this.object;
		let 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 !== null && pointer.button !== - 1 ) ) return;

if ( pointer !== null ) _raycaster.setFromCamera( pointer, this.camera );

const planeIntersect = intersectObjectWithRay( this._plane, _raycaster, true );

if ( ! planeIntersect ) return;

this.pointEnd.copy( planeIntersect.point ).sub( this.worldPositionStart );

if ( mode === 'translate' ) {

// Apply translate

this._offset.copy( this.pointEnd ).sub( this.pointStart );

if ( space === 'local' && axis !== 'XYZ' ) {

this._offset.applyQuaternion( this._worldQuaternionInv );

}

if ( axis.indexOf( 'X' ) === - 1 ) this._offset.x = 0;
			if ( axis.indexOf( 'Y' ) === - 1 ) this._offset.y = 0;
			if ( axis.indexOf( 'Z' ) === - 1 ) this._offset.z = 0;

if ( space === 'local' && axis !== 'XYZ' ) {

this._offset.applyQuaternion( this._quaternionStart ).divide( this._parentScale );

} else {

this._offset.applyQuaternion( this._parentQuaternionInv ).divide( this._parentScale );

}

object.position.copy( this._offset ).add( this._positionStart );

// Apply translation snap

if ( this.translationSnap ) {

if ( space === 'local' ) {

object.position.applyQuaternion( _tempQuaternion.copy( this._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( this._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 ) );

}

object.position.x = Math.max( this.minX, Math.min( this.maxX, object.position.x ) );
			object.position.y = Math.max( this.minY, Math.min( this.maxY, object.position.y ) );
			object.position.z = Math.max( this.minZ, Math.min( this.maxZ, object.position.z ) );

} else if ( mode === 'scale' ) {

if ( axis.search( 'XYZ' ) !== - 1 ) {

let d = this.pointEnd.length() / this.pointStart.length();

if ( this.pointEnd.dot( this.pointStart ) < 0 ) d *= - 1;

_tempVector2.set( d, d, d );

} else {

_tempVector.copy( this.pointStart );
				_tempVector2.copy( this.pointEnd );

_tempVector.applyQuaternion( this._worldQuaternionInv );
				_tempVector2.applyQuaternion( this._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( this._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' ) {

this._offset.copy( this.pointEnd ).sub( this.pointStart );

const ROTATION_SPEED = 20 / this.worldPosition.distanceTo( _tempVector.setFromMatrixPosition( this.camera.matrixWorld ) );

let _inPlaneRotation = false;

if ( axis === 'XYZE' ) {

this.rotationAxis.copy( this._offset ).cross( this.eye ).normalize();
				this.rotationAngle = this._offset.dot( _tempVector.copy( this.rotationAxis ).cross( this.eye ) ) * ROTATION_SPEED;

} else if ( axis === 'X' || axis === 'Y' || axis === 'Z' ) {

this.rotationAxis.copy( _unit[ axis ] );

_tempVector.copy( _unit[ axis ] );

if ( space === 'local' ) {

_tempVector.applyQuaternion( this.worldQuaternion );

}

_tempVector.cross( this.eye );

// When _tempVector is 0 after cross with this.eye the vectors are parallel and should use in-plane rotation logic.
				if ( _tempVector.length() === 0 ) {

_inPlaneRotation = true;

} else {

this.rotationAngle = this._offset.dot( _tempVector.normalize() ) * ROTATION_SPEED;

}

if ( axis === 'E' || _inPlaneRotation ) {

this.rotationAxis.copy( this.eye );
				this.rotationAngle = this.pointEnd.angleTo( this.pointStart );

this._startNorm.copy( this.pointStart ).normalize();
				this._endNorm.copy( this.pointEnd ).normalize();

this.rotationAngle *= ( this._endNorm.cross( this._startNorm ).dot( this.eye ) < 0 ? 1 : - 1 );

}

// Apply rotation snap

if ( this.rotationSnap ) this.rotationAngle = Math.round( this.rotationAngle / this.rotationSnap ) * this.rotationSnap;

// Apply rotate
			if ( space === 'local' && axis !== 'E' && axis !== 'XYZE' ) {

object.quaternion.copy( this._quaternionStart );
				object.quaternion.multiply( _tempQuaternion.setFromAxisAngle( this.rotationAxis, this.rotationAngle ) ).normalize();

} else {

this.rotationAxis.applyQuaternion( this._parentQuaternionInv );
				object.quaternion.copy( _tempQuaternion.setFromAxisAngle( this.rotationAxis, this.rotationAngle ) );
				object.quaternion.multiply( this._quaternionStart ).normalize();

}

this.dispatchEvent( _changeEvent );
		this.dispatchEvent( _objectChangeEvent );

}

pointerUp( pointer ) {

if ( pointer !== null && pointer.button !== 0 ) return;

if ( this.dragging && ( this.axis !== null ) ) {

_mouseUpEvent.mode = this.mode;
			this.dispatchEvent( _mouseUpEvent );

}

this.dragging = false;
		this.axis = null;

}

dispose() {

this.disconnect();

this._root.dispose();

}

// Set current object
	attach( object ) {

this.object = object;
		this._root.visible = true;

return this;

}

// Detach from object
	detach() {

this.object = undefined;
		this.axis = null;

this._root.visible = false;

return this;

}

reset() {

if ( ! this.enabled ) return;

if ( this.dragging ) {

this.object.position.copy( this._positionStart );
			this.object.quaternion.copy( this._quaternionStart );
			this.object.scale.copy( this._scaleStart );

this.dispatchEvent( _changeEvent );
			this.dispatchEvent( _objectChangeEvent );

this.pointStart.copy( this.pointEnd );

}

getRaycaster() {

return _raycaster;

}

// TODO: deprecate

getMode() {

return this.mode;

}

setMode( mode ) {

this.mode = mode;

}

setTranslationSnap( translationSnap ) {

this.translationSnap = translationSnap;

}

setRotationSnap( rotationSnap ) {

this.rotationSnap = rotationSnap;

}

setScaleSnap( scaleSnap ) {

this.scaleSnap = scaleSnap;

}

setSize( size ) {

this.size = size;

}

setSpace( space ) {

this.space = space;

}

// mouse / touch event handlers

function getPointer( event ) {

if ( this.domElement.ownerDocument.pointerLockElement ) {

return {
			x: 0,
			y: 0,
			button: event.button
		};

} else {

const rect = this.domElement.getBoundingClientRect();

return {
			x: ( event.clientX - rect.left ) / rect.width * 2 - 1,
			y: - ( event.clientY - rect.top ) / rect.height * 2 + 1,
			button: event.button
		};

}

function onPointerHover( event ) {

if ( ! this.enabled ) return;

switch ( event.pointerType ) {

case 'mouse':
		case 'pen':
			this.pointerHover( this._getPointer( event ) );
			break;

}

function onPointerDown( event ) {

if ( ! this.enabled ) return;

if ( ! document.pointerLockElement ) {

this.domElement.setPointerCapture( event.pointerId );

}

this.domElement.addEventListener( 'pointermove', this._onPointerMove );

this.pointerHover( this._getPointer( event ) );
	this.pointerDown( this._getPointer( event ) );

}

function onPointerMove( event ) {

if ( ! this.enabled ) return;

this.pointerMove( this._getPointer( event ) );

}

function onPointerUp( event ) {

if ( ! this.enabled ) return;

this.domElement.releasePointerCapture( event.pointerId );

this.domElement.removeEventListener( 'pointermove', this._onPointerMove );

this.pointerUp( this._getPointer( event ) );

}

function intersectObjectWithRay( object, raycaster, includeInvisible ) {

const allIntersections = raycaster.intersectObject( object, true );

for ( let i = 0; i < allIntersections.length; i ++ ) {

if ( allIntersections[ i ].object.visible || includeInvisible ) {

return allIntersections[ i ];

}

return false;

}

// Reusable utility variables

const _tempEuler = new Euler();
const _alignVector = new Vector3( 0, 1, 0 );
const _zeroVector = new Vector3( 0, 0, 0 );
const _lookAtMatrix = new Matrix4();
const _tempQuaternion2 = new Quaternion();
const _identityQuaternion = new Quaternion();
const _dirVector = new Vector3();
const _tempMatrix = new Matrix4();

const _unitX = new Vector3( 1, 0, 0 );
const _unitY = new Vector3( 0, 1, 0 );
const _unitZ = new Vector3( 0, 0, 1 );

const _v1 = new Vector3();
const _v2 = new Vector3();
const _v3 = new Vector3();

class TransformControlsRoot extends Object3D {

constructor( controls ) {

super();

this.isTransformControlsRoot = true;

this.controls = controls;
		this.visible = false;

}

// updateMatrixWorld updates key transformation variables
	updateMatrixWorld( force ) {

const controls = this.controls;

if ( controls.object !== undefined ) {

controls.object.updateMatrixWorld();

if ( controls.object.parent === null ) {

console.error( 'TransformControls: The attached 3D object must be a part of the scene graph.' );

} else {

controls.object.parent.matrixWorld.decompose( controls._parentPosition, controls._parentQuaternion, controls._parentScale );

}

controls.object.matrixWorld.decompose( controls.worldPosition, controls.worldQuaternion, controls._worldScale );

controls._parentQuaternionInv.copy( controls._parentQuaternion ).invert();
			controls._worldQuaternionInv.copy( controls.worldQuaternion ).invert();

}

controls.camera.updateMatrixWorld();
		controls.camera.matrixWorld.decompose( controls.cameraPosition, controls.cameraQuaternion, controls._cameraScale );

if ( controls.camera.isOrthographicCamera ) {

controls.camera.getWorldDirection( controls.eye ).negate();

} else {

controls.eye.copy( controls.cameraPosition ).sub( controls.worldPosition ).normalize();

}

super.updateMatrixWorld( force );

}

dispose() {

this.traverse( function ( child ) {

if ( child.geometry ) child.geometry.dispose();
			if ( child.material ) child.material.dispose();

} );

}

class TransformControlsGizmo extends Object3D {

constructor() {

super();

this.isTransformControlsGizmo = true;

this.type = 'TransformControlsGizmo';

// shared materials

const gizmoMaterial = new MeshBasicMaterial( {
			depthTest: false,
			depthWrite: false,
			fog: false,
			toneMapped: false,
			transparent: true
		} );

const gizmoLineMaterial = new LineBasicMaterial( {
			depthTest: false,
			depthWrite: false,
			fog: false,
			toneMapped: false,
			transparent: true
		} );

// Make unique material for each axis/color

const matInvisible = gizmoMaterial.clone();
		matInvisible.opacity = 0.15;

const matHelper = gizmoLineMaterial.clone();
		matHelper.opacity = 0.5;

const matRed = gizmoMaterial.clone();
		matRed.color.setHex( 0xff0000 );

const matGreen = gizmoMaterial.clone();
		matGreen.color.setHex( 0x00ff00 );

const matBlue = gizmoMaterial.clone();
		matBlue.color.setHex( 0x0000ff );

const matRedTransparent = gizmoMaterial.clone();
		matRedTransparent.color.setHex( 0xff0000 );
		matRedTransparent.opacity = 0.5;

const matGreenTransparent = gizmoMaterial.clone();
		matGreenTransparent.color.setHex( 0x00ff00 );
		matGreenTransparent.opacity = 0.5;

const matBlueTransparent = gizmoMaterial.clone();
		matBlueTransparent.color.setHex( 0x0000ff );
		matBlueTransparent.opacity = 0.5;

const matWhiteTransparent = gizmoMaterial.clone();
		matWhiteTransparent.opacity = 0.25;

const matYellowTransparent = gizmoMaterial.clone();
		matYellowTransparent.color.setHex( 0xffff00 );
		matYellowTransparent.opacity = 0.25;

const matYellow = gizmoMaterial.clone();
		matYellow.color.setHex( 0xffff00 );

const matGray = gizmoMaterial.clone();
		matGray.color.setHex( 0x787878 );

// reusable geometry

const arrowGeometry = new CylinderGeometry( 0, 0.04, 0.1, 12 );
		arrowGeometry.translate( 0, 0.05, 0 );

const scaleHandleGeometry = new BoxGeometry( 0.08, 0.08, 0.08 );
		scaleHandleGeometry.translate( 0, 0.04, 0 );

const lineGeometry = new BufferGeometry();
		lineGeometry.setAttribute( 'position', new Float32BufferAttribute( [ 0, 0, 0,	1, 0, 0 ], 3 ) );

const lineGeometry2 = new CylinderGeometry( 0.0075, 0.0075, 0.5, 3 );
		lineGeometry2.translate( 0, 0.25, 0 );

function CircleGeometry( radius, arc ) {

const geometry = new TorusGeometry( radius, 0.0075, 3, 64, arc * Math.PI * 2 );
			geometry.rotateY( Math.PI / 2 );
			geometry.rotateX( Math.PI / 2 );
			return geometry;

}

// Special geometry for transform helper. If scaled with position vector it spans from [0,0,0] to position

function TranslateHelperGeometry() {

const 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

const gizmoTranslate = {
			X: [
				[ new Mesh( arrowGeometry, matRed ), [ 0.5, 0, 0 ], [ 0, 0, - Math.PI / 2 ]],
				[ new Mesh( arrowGeometry, matRed ), [ - 0.5, 0, 0 ], [ 0, 0, Math.PI / 2 ]],
				[ new Mesh( lineGeometry2, matRed ), [ 0, 0, 0 ], [ 0, 0, - Math.PI / 2 ]]
			],
			Y: [
				[ new Mesh( arrowGeometry, matGreen ), [ 0, 0.5, 0 ]],
				[ new Mesh( arrowGeometry, matGreen ), [ 0, - 0.5, 0 ], [ Math.PI, 0, 0 ]],
				[ new Mesh( lineGeometry2, matGreen ) ]
			],
			Z: [
				[ new Mesh( arrowGeometry, matBlue ), [ 0, 0, 0.5 ], [ Math.PI / 2, 0, 0 ]],
				[ new Mesh( arrowGeometry, matBlue ), [ 0, 0, - 0.5 ], [ - Math.PI / 2, 0, 0 ]],
				[ new Mesh( lineGeometry2, matBlue ), null, [ Math.PI / 2, 0, 0 ]]
			],
			XYZ: [
				[ new Mesh( new OctahedronGeometry( 0.1, 0 ), matWhiteTransparent.clone() ), [ 0, 0, 0 ]]
			],
			XY: [
				[ new Mesh( new BoxGeometry( 0.15, 0.15, 0.01 ), matBlueTransparent.clone() ), [ 0.15, 0.15, 0 ]]
			],
			YZ: [
				[ new Mesh( new BoxGeometry( 0.15, 0.15, 0.01 ), matRedTransparent.clone() ), [ 0, 0.15, 0.15 ], [ 0, Math.PI / 2, 0 ]]
			],
			XZ: [
				[ new Mesh( new BoxGeometry( 0.15, 0.15, 0.01 ), matGreenTransparent.clone() ), [ 0.15, 0, 0.15 ], [ - Math.PI / 2, 0, 0 ]]
			]
		};

const pickerTranslate = {
			X: [
				[ new Mesh( new CylinderGeometry( 0.2, 0, 0.6, 4 ), matInvisible ), [ 0.3, 0, 0 ], [ 0, 0, - Math.PI / 2 ]],
				[ new Mesh( new CylinderGeometry( 0.2, 0, 0.6, 4 ), matInvisible ), [ - 0.3, 0, 0 ], [ 0, 0, Math.PI / 2 ]]
			],
			Y: [
				[ new Mesh( new CylinderGeometry( 0.2, 0, 0.6, 4 ), matInvisible ), [ 0, 0.3, 0 ]],
				[ new Mesh( new CylinderGeometry( 0.2, 0, 0.6, 4 ), matInvisible ), [ 0, - 0.3, 0 ], [ 0, 0, Math.PI ]]
			],
			Z: [
				[ new Mesh( new CylinderGeometry( 0.2, 0, 0.6, 4 ), matInvisible ), [ 0, 0, 0.3 ], [ Math.PI / 2, 0, 0 ]],
				[ new Mesh( new CylinderGeometry( 0.2, 0, 0.6, 4 ), matInvisible ), [ 0, 0, - 0.3 ], [ - Math.PI / 2, 0, 0 ]]
			],
			XYZ: [
				[ new Mesh( new OctahedronGeometry( 0.2, 0 ), matInvisible ) ]
			],
			XY: [
				[ new Mesh( new BoxGeometry( 0.2, 0.2, 0.01 ), matInvisible ), [ 0.15, 0.15, 0 ]]
			],
			YZ: [
				[ new Mesh( new BoxGeometry( 0.2, 0.2, 0.01 ), matInvisible ), [ 0, 0.15, 0.15 ], [ 0, Math.PI / 2, 0 ]]
			],
			XZ: [
				[ new Mesh( new BoxGeometry( 0.2, 0.2, 0.01 ), matInvisible ), [ 0.15, 0, 0.15 ], [ - Math.PI / 2, 0, 0 ]]
			]
		};

const 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' ]
			]
		};

const gizmoRotate = {
			XYZE: [
				[ new Mesh( CircleGeometry( 0.5, 1 ), matGray ), null, [ 0, Math.PI / 2, 0 ]]
			],
			X: [
				[ new Mesh( CircleGeometry( 0.5, 0.5 ), matRed ) ]
			],
			Y: [
				[ new Mesh( CircleGeometry( 0.5, 0.5 ), matGreen ), null, [ 0, 0, - Math.PI / 2 ]]
			],
			Z: [
				[ new Mesh( CircleGeometry( 0.5, 0.5 ), matBlue ), null, [ 0, Math.PI / 2, 0 ]]
			],
			E: [
				[ new Mesh( CircleGeometry( 0.75, 1 ), matYellowTransparent ), null, [ 0, Math.PI / 2, 0 ]]
			]
		};

const helperRotate = {
			AXIS: [
				[ new Line( lineGeometry, matHelper.clone() ), [ - 1e3, 0, 0 ], null, [ 1e6, 1, 1 ], 'helper' ]
			]
		};

const pickerRotate = {
			XYZE: [
				[ new Mesh( new SphereGeometry( 0.25, 10, 8 ), matInvisible ) ]
			],
			X: [
				[ new Mesh( new TorusGeometry( 0.5, 0.1, 4, 24 ), matInvisible ), [ 0, 0, 0 ], [ 0, - Math.PI / 2, - Math.PI / 2 ]],
			],
			Y: [
				[ new Mesh( new TorusGeometry( 0.5, 0.1, 4, 24 ), matInvisible ), [ 0, 0, 0 ], [ Math.PI / 2, 0, 0 ]],
			],
			Z: [
				[ new Mesh( new TorusGeometry( 0.5, 0.1, 4, 24 ), matInvisible ), [ 0, 0, 0 ], [ 0, 0, - Math.PI / 2 ]],
			],
			E: [
				[ new Mesh( new TorusGeometry( 0.75, 0.1, 2, 24 ), matInvisible ) ]
			]
		};

const gizmoScale = {
			X: [
				[ new Mesh( scaleHandleGeometry, matRed ), [ 0.5, 0, 0 ], [ 0, 0, - Math.PI / 2 ]],
				[ new Mesh( lineGeometry2, matRed ), [ 0, 0, 0 ], [ 0, 0, - Math.PI / 2 ]],
				[ new Mesh( scaleHandleGeometry, matRed ), [ - 0.5, 0, 0 ], [ 0, 0, Math.PI / 2 ]],
			],
			Y: [
				[ new Mesh( scaleHandleGeometry, matGreen ), [ 0, 0.5, 0 ]],
				[ new Mesh( lineGeometry2, matGreen ) ],
				[ new Mesh( scaleHandleGeometry, matGreen ), [ 0, - 0.5, 0 ], [ 0, 0, Math.PI ]],
			],
			Z: [
				[ new Mesh( scaleHandleGeometry, matBlue ), [ 0, 0, 0.5 ], [ Math.PI / 2, 0, 0 ]],
				[ new Mesh( lineGeometry2, matBlue ), [ 0, 0, 0 ], [ Math.PI / 2, 0, 0 ]],
				[ new Mesh( scaleHandleGeometry, matBlue ), [ 0, 0, - 0.5 ], [ - Math.PI / 2, 0, 0 ]]
			],
			XY: [
				[ new Mesh( new BoxGeometry( 0.15, 0.15, 0.01 ), matBlueTransparent ), [ 0.15, 0.15, 0 ]]
			],
			YZ: [
				[ new Mesh( new BoxGeometry( 0.15, 0.15, 0.01 ), matRedTransparent ), [ 0, 0.15, 0.15 ], [ 0, Math.PI / 2, 0 ]]
			],
			XZ: [
				[ new Mesh( new BoxGeometry( 0.15, 0.15, 0.01 ), matGreenTransparent ), [ 0.15, 0, 0.15 ], [ - Math.PI / 2, 0, 0 ]]
			],
			XYZ: [
				[ new Mesh( new BoxGeometry( 0.1, 0.1, 0.1 ), matWhiteTransparent.clone() ) ],
			]
		};

const pickerScale = {
			X: [
				[ new Mesh( new CylinderGeometry( 0.2, 0, 0.6, 4 ), matInvisible ), [ 0.3, 0, 0 ], [ 0, 0, - Math.PI / 2 ]],
				[ new Mesh( new CylinderGeometry( 0.2, 0, 0.6, 4 ), matInvisible ), [ - 0.3, 0, 0 ], [ 0, 0, Math.PI / 2 ]]
			],
			Y: [
				[ new Mesh( new CylinderGeometry( 0.2, 0, 0.6, 4 ), matInvisible ), [ 0, 0.3, 0 ]],
				[ new Mesh( new CylinderGeometry( 0.2, 0, 0.6, 4 ), matInvisible ), [ 0, - 0.3, 0 ], [ 0, 0, Math.PI ]]
			],
			Z: [
				[ new Mesh( new CylinderGeometry( 0.2, 0, 0.6, 4 ), matInvisible ), [ 0, 0, 0.3 ], [ Math.PI / 2, 0, 0 ]],
				[ new Mesh( new CylinderGeometry( 0.2, 0, 0.6, 4 ), matInvisible ), [ 0, 0, - 0.3 ], [ - Math.PI / 2, 0, 0 ]]
			],
			XY: [
				[ new Mesh( new BoxGeometry( 0.2, 0.2, 0.01 ), matInvisible ), [ 0.15, 0.15, 0 ]],
			],
			YZ: [
				[ new Mesh( new BoxGeometry( 0.2, 0.2, 0.01 ), matInvisible ), [ 0, 0.15, 0.15 ], [ 0, Math.PI / 2, 0 ]],
			],
			XZ: [
				[ new Mesh( new BoxGeometry( 0.2, 0.2, 0.01 ), matInvisible ), [ 0.15, 0, 0.15 ], [ - Math.PI / 2, 0, 0 ]],
			],
			XYZ: [
				[ new Mesh( new BoxGeometry( 0.2, 0.2, 0.2 ), matInvisible ), [ 0, 0, 0 ]],
			]
		};

const 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.

function setupGizmo( gizmoMap ) {

const gizmo = new Object3D();

for ( const name in gizmoMap ) {

for ( let i = gizmoMap[ name ].length; i --; ) {

const object = gizmoMap[ name ][ i ][ 0 ].clone();
					const position = gizmoMap[ name ][ i ][ 1 ];
					const rotation = gizmoMap[ name ][ i ][ 2 ];
					const scale = gizmoMap[ name ][ i ][ 3 ];
					const 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();

const 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;

}

// 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

updateMatrixWorld( force ) {

const space = ( this.mode === 'scale' ) ? 'local' : this.space; // scale always oriented to local rotation

const 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';

let 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 ( let i = 0; i < handles.length; i ++ ) {

const handle = handles[ i ];

// hide aligned to camera

handle.visible = true;
			handle.rotation.set( 0, 0, 0 );
			handle.position.copy( this.worldPosition );

let 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 / 4 );

// TODO: simplify helpers and consider decoupling from gizmo

if ( handle.tag === 'helper' ) {

handle.visible = false;

if ( handle.name === 'AXIS' ) {

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

const AXIS_HIDE_THRESHOLD = 0.99;
				const PLANE_HIDE_THRESHOLD = 0.2;

if ( handle.name === 'X' ) {

if ( Math.abs( _alignVector.copy( _unitX ).applyQuaternion( quaternion ).dot( this.eye ) ) > AXIS_HIDE_THRESHOLD ) {