text: /* eslint-disable */
  // src: https://github.com/mrdoob/three.js/blob/master/examples/jsm/controls/TransformControls.js
  // Note: customisations:
  // - cosmetic blues for materials
  // - added "hover" event
  // - added "translationDotsOnly" prop for box face manipulation
  
  import {
    BoxGeometry,
    BufferGeometry,
    Color,
    CylinderGeometry,
    DoubleSide,
    Euler,
    Float32BufferAttribute,
    Line,
    LineBasicMaterial,
    Matrix4,
    Mesh,
    MeshBasicMaterial,
    Object3D,
    OctahedronGeometry,
    PlaneGeometry,
    Quaternion,
    Raycaster,
    SphereGeometry,
    TorusGeometry,
    Vector3
  } from 'three';
  
  var TransformControls = function ( camera, domElement, translationDotsOnly ) {
  
    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( translationDotsOnly );
    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;
  
        this.dispatchEvent( { type: 'hover', value: true } );
  
      } else {
  
        this.axis = null;
  
        this.dispatchEvent( { type: 'hover', value: false } );
      }
  
    };
  
    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 ( translationDotsOnly ) {
  
    '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( 0x0A66FF );
  
    var matGreen = gizmoMaterial.clone();
    matGreen.color.set( 0x0A66FF );
  
    var matBlue = gizmoMaterial.clone();
    matBlue.color.set( 0x0A66FF );
  
    var matWhiteTransparent = gizmoMaterial.clone();
    matWhiteTransparent.opacity = 0.25;
  
    var matYellowTransparent = matWhiteTransparent.clone();
    matYellowTransparent.color.set( 0x0A66FF );
  
    var matCyanTransparent = matWhiteTransparent.clone();
    matCyanTransparent.color.set( 0x0A66FF );
  
    var matMagentaTransparent = matWhiteTransparent.clone();
    matMagentaTransparent.color.set( 0x0A66FF );
  
    var matYellow = gizmoMaterial.clone();
    matYellow.color.set( 0x0A66FF );
  
    var matLineRed = gizmoLineMaterial.clone();
    matLineRed.color.set( 0x0A66FF );
  
    var matLineGreen = gizmoLineMaterial.clone();
    matLineGreen.color.set( 0x0A66FF );
  
    var matLineBlue = gizmoLineMaterial.clone();
    matLineBlue.color.set( 0x0A66FF );
  
    var matLineCyan = gizmoLineMaterial.clone();
    matLineCyan.color.set( 0x0A66FF );
  
    var matLineMagenta = gizmoLineMaterial.clone();
    matLineMagenta.color.set( 0x0A66FF );
  
    var matLineYellow = gizmoLineMaterial.clone();
    matLineYellow.color.set( 0x0A66FF );
  
    var matLineGray = gizmoLineMaterial.clone();
    matLineGray.color.set( 0x787878 );
  
    var matLineYellowTransparent = matLineYellow.clone();
    matLineYellowTransparent.opacity = 0.25;
  
    // reusable geometry
  
    var arrowGeometry = new CylinderGeometry( 0, 0.1, 0.2, 12, 1, false );
    var sphereGeometry = new SphereGeometry( 0.075, 10, 10 );
  
    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( translationDotsOnly ? sphereGeometry : arrowGeometry, matRed ), [ 1, 0, 0 ], [ 0, 0, - Math.PI / 2 ], null, 'fwd' ],
        [ new Mesh( translationDotsOnly ? sphereGeometry : arrowGeometry, matRed ), [ 1, 0, 0 ], [ 0, 0, Math.PI / 2 ], null, 'bwd' ],
        [ translationDotsOnly ? null : new Line( lineGeometry, matLineRed ) ]
      ],
      Y: [
        [ new Mesh( translationDotsOnly ? sphereGeometry : arrowGeometry, matGreen ), [ 0, 1, 0 ], null, null, 'fwd' ],
        [ new Mesh( translationDotsOnly ? sphereGeometry : arrowGeometry, matGreen ), [ 0, 1, 0 ], [ Math.PI, 0, 0 ], null, 'bwd' ],
        [ translationDotsOnly ? null : new Line( lineGeometry, matLineGreen ), null, [ 0, 0, Math.PI / 2 ]]
      ],
      Z: [
        [ new Mesh( translationDotsOnly ? sphereGeometry : arrowGeometry, matBlue ), [ 0, 0, 1 ], [ Math.PI / 2, 0, 0 ], null, 'fwd' ],
        [ new Mesh( translationDotsOnly ? sphereGeometry : arrowGeometry, matBlue ), [ 0, 0, 1 ], [ - Math.PI / 2, 0, 0 ], null, 'bwd' ],
        [ translationDotsOnly ? null :  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: [
        [ translationDotsOnly ? null : new Line( lineGeometry, matHelper.clone() ), [ - 1e3, 0, 0 ], null, [ 1e6, 1, 1 ], 'helper' ]
      ],
      Y: [
        [ translationDotsOnly ? null : new Line( lineGeometry, matHelper.clone() ), [ 0, - 1e3, 0 ], [ 0, 0, Math.PI / 2 ], [ 1e6, 1, 1 ], 'helper' ]
      ],
      Z: [
        [ translationDotsOnly ? null : 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 ]
          if( object ) object = object.clone();
          else continue
  
          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();
  
          if( !translationDotsOnly ) {
  
            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 };
  