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  • chris
  • multiscale
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TransformControls.js

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  • TransformControls.js 45.05 KiB
    console.warn( "THREE.TransformControls: As part of the transition to ES6 Modules, the files in 'examples/js' were deprecated in May 2020 (r117) and will be deleted in December 2020 (r124). You can find more information about developing using ES6 Modules in https://threejs.org/docs/#manual/en/introduction/Installation." );
    
    THREE.TransformControls = function ( camera, domElement ) {
    
    	if ( domElement === undefined ) {
    
    		console.warn( 'THREE.TransformControls: The second parameter "domElement" is now mandatory.' );
    		domElement = document;
    
    	}
    
    	THREE.Object3D.call( this );
    
    	this.visible = false;
    	this.domElement = domElement;
    
    	var _gizmo = new THREE.TransformControlsGizmo();
    	this.add( _gizmo );
    
    	var _plane = new THREE.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 THREE.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 THREE.Vector3();
    	var _tempVector2 = new THREE.Vector3();
    	var _tempQuaternion = new THREE.Quaternion();
    	var _unit = {
    		X: new THREE.Vector3( 1, 0, 0 ),
    		Y: new THREE.Vector3( 0, 1, 0 ),
    		Z: new THREE.Vector3( 0, 0, 1 )
    	};
    
    	var pointStart = new THREE.Vector3();
    	var pointEnd = new THREE.Vector3();
    	var offset = new THREE.Vector3();
    	var rotationAxis = new THREE.Vector3();
    	var startNorm = new THREE.Vector3();
    	var endNorm = new THREE.Vector3();
    	var rotationAngle = 0;
    
    	var cameraPosition = new THREE.Vector3();
    	var cameraQuaternion = new THREE.Quaternion();
    	var cameraScale = new THREE.Vector3();
    
    	var parentPosition = new THREE.Vector3();
    	var parentQuaternion = new THREE.Quaternion();
    	var parentQuaternionInv = new THREE.Quaternion();
    	var parentScale = new THREE.Vector3();
    
    	var worldPositionStart = new THREE.Vector3();
    	var worldQuaternionStart = new THREE.Quaternion();
    	var worldScaleStart = new THREE.Vector3();
    
    	var worldPosition = new THREE.Vector3();
    	var worldQuaternion = new THREE.Quaternion();
    	var worldQuaternionInv = new THREE.Quaternion();
    	var worldScale = new THREE.Vector3();
    
    	var eye = new THREE.Vector3();
    
    	var positionStart = new THREE.Vector3();
    	var quaternionStart = new THREE.Quaternion();
    	var scaleStart = new THREE.Vector3();
    
    	// TODO: remove properties unused in plane and gizmo
    
    	defineProperty( "worldPosition", worldPosition );
    	defineProperty( "worldPositionStart", worldPositionStart );
    	defineProperty( "worldQuaternion", worldQuaternion );
    	defineProperty( "worldQuaternionStart", worldQuaternionStart );
    	defineProperty( "cameraPosition", cameraPosition );
    	defineProperty( "cameraQuaternion", cameraQuaternion );
    	defineProperty( "pointStart", pointStart );
    	defineProperty( "pointEnd", pointEnd );
    	defineProperty( "rotationAxis", rotationAxis );
    	defineProperty( "rotationAngle", rotationAngle );
    	defineProperty( "eye", eye );
    
    	{
    
    		domElement.addEventListener( "mousedown", onPointerDown, false );
    		domElement.addEventListener( "touchstart", onPointerDown, false );
    		domElement.addEventListener( "mousemove", onPointerHover, false );
    		domElement.addEventListener( "touchmove", onPointerHover, false );
    		domElement.addEventListener( "touchmove", onPointerMove, false );
    		scope.domElement.ownerDocument.addEventListener( "mouseup", onPointerUp, false );
    		domElement.addEventListener( "touchend", onPointerUp, false );
    		domElement.addEventListener( "touchcancel", onPointerUp, false );
    		domElement.addEventListener( "touchleave", onPointerUp, false );
    
    	}
    
    	this.dispose = function () {
    
    		domElement.removeEventListener( "mousedown", onPointerDown );
    		domElement.removeEventListener( "touchstart", onPointerDown );
    		domElement.removeEventListener( "mousemove", onPointerHover );
    		scope.domElement.ownerDocument.removeEventListener( "mousemove", onPointerMove );
    		domElement.removeEventListener( "touchmove", onPointerHover );
    		domElement.removeEventListener( "touchmove", onPointerMove );
    		scope.domElement.ownerDocument.removeEventListener( "mouseup", onPointerUp );
    		domElement.removeEventListener( "touchend", onPointerUp );
    		domElement.removeEventListener( "touchcancel", onPointerUp );
    		domElement.removeEventListener( "touchleave", 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 ).inverse();
    			worldQuaternionInv.copy( worldQuaternion ).inverse();
    
    		}
    
    		this.camera.updateMatrixWorld();
    		this.camera.matrixWorld.decompose( cameraPosition, cameraQuaternion, cameraScale );
    
    		eye.copy( cameraPosition ).sub( worldPosition ).normalize();
    
    		THREE.Object3D.prototype.updateMatrixWorld.call( this );
    
    	};
    
    	this.pointerHover = function ( pointer ) {
    
    		if ( this.object === undefined || this.dragging === true || ( pointer.button !== undefined && pointer.button !== 0 ) ) 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 !== undefined && pointer.button !== 0 ) ) return;
    
    		if ( ( pointer.button === 0 || pointer.button === undefined ) && 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 !== undefined && pointer.button !== 0 ) ) 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 ).inverse() );
    
    					if ( axis.search( 'X' ) !== - 1 ) {
    
    						object.position.x = Math.round( object.position.x / this.translationSnap ) * this.translationSnap;
    
    					}
    
    					if ( axis.search( 'Y' ) !== - 1 ) {
    
    						object.position.y = Math.round( object.position.y / this.translationSnap ) * this.translationSnap;
    
    					}
    
    					if ( axis.search( 'Z' ) !== - 1 ) {
    
    						object.position.z = Math.round( object.position.z / this.translationSnap ) * this.translationSnap;
    
    					}
    
    					object.position.applyQuaternion( quaternionStart );
    
    				}
    
    				if ( space === 'world' ) {
    
    					if ( object.parent ) {
    
    						object.position.add( _tempVector.setFromMatrixPosition( object.parent.matrixWorld ) );
    
    					}
    
    					if ( axis.search( 'X' ) !== - 1 ) {
    
    						object.position.x = Math.round( object.position.x / this.translationSnap ) * this.translationSnap;
    
    					}
    
    					if ( axis.search( 'Y' ) !== - 1 ) {
    
    						object.position.y = Math.round( object.position.y / this.translationSnap ) * this.translationSnap;
    
    					}
    
    					if ( axis.search( 'Z' ) !== - 1 ) {
    
    						object.position.z = Math.round( object.position.z / this.translationSnap ) * this.translationSnap;
    
    					}
    
    					if ( object.parent ) {
    
    						object.position.sub( _tempVector.setFromMatrixPosition( object.parent.matrixWorld ) );
    
    					}
    
    				}
    
    			}
    
    		} else if ( mode === 'scale' ) {
    
    			if ( axis.search( 'XYZ' ) !== - 1 ) {
    
    				var d = pointEnd.length() / pointStart.length();
    
    				if ( pointEnd.dot( pointStart ) < 0 ) d *= - 1;
    
    				_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 !== undefined && pointer.button !== 0 ) return;
    
    		if ( this.dragging && ( this.axis !== null ) ) {
    
    			mouseUpEvent.mode = this.mode;
    			this.dispatchEvent( mouseUpEvent );
    
    		}
    
    		this.dragging = false;
    
    		if ( pointer.button === undefined ) this.axis = null;
    
    	};
    
    	// normalize mouse / touch pointer and remap {x,y} to view space.
    
    	function getPointer( event ) {
    
    		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;
    
    		scope.pointerHover( getPointer( event ) );
    
    	}
    
    	function onPointerDown( event ) {
    
    		if ( ! scope.enabled ) return;
    
    		scope.domElement.ownerDocument.addEventListener( "mousemove", onPointerMove, false );
    
    		scope.pointerHover( getPointer( event ) );
    		scope.pointerDown( getPointer( event ) );
    
    	}
    
    	function onPointerMove( event ) {
    
    		if ( ! scope.enabled ) return;
    
    		scope.pointerMove( getPointer( event ) );
    
    	}
    
    	function onPointerUp( event ) {
    
    		if ( ! scope.enabled ) return;
    
    		scope.domElement.ownerDocument.removeEventListener( "mousemove", onPointerMove, false );
    
    		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.' );
    
    	};
    
    };
    
    THREE.TransformControls.prototype = Object.assign( Object.create( THREE.Object3D.prototype ), {
    
    	constructor: THREE.TransformControls,
    
    	isTransformControls: true
    
    } );
    
    
    THREE.TransformControlsGizmo = function () {
    
    	'use strict';
    
    	THREE.Object3D.call( this );
    
    	this.type = 'TransformControlsGizmo';
    
    	// shared materials
    
    	var gizmoMaterial = new THREE.MeshBasicMaterial( {
    		depthTest: false,
    		depthWrite: false,
    		transparent: true,
    		side: THREE.DoubleSide,
    		fog: false,
    		toneMapped: false
    	} );
    
    	var gizmoLineMaterial = new THREE.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 THREE.CylinderBufferGeometry( 0, 0.05, 0.2, 12, 1, false );
    
    	var scaleHandleGeometry = new THREE.BoxBufferGeometry( 0.125, 0.125, 0.125 );
    
    	var lineGeometry = new THREE.BufferGeometry();
    	lineGeometry.setAttribute( 'position', new THREE.Float32BufferAttribute( [ 0, 0, 0,	1, 0, 0 ], 3 ) );
    
    	var CircleGeometry = function ( radius, arc ) {
    
    		var geometry = new THREE.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 THREE.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 THREE.BufferGeometry();
    
    		geometry.setAttribute( 'position', new THREE.Float32BufferAttribute( [ 0, 0, 0, 1, 1, 1 ], 3 ) );
    
    		return geometry;
    
    	};
    
    	// Gizmo definitions - custom hierarchy definitions for setupGizmo() function
    
    	var gizmoTranslate = {
    		X: [
    			[ new THREE.Mesh( arrowGeometry, matRed ), [ 1, 0, 0 ], [ 0, 0, - Math.PI / 2 ], null, 'fwd' ],
    			[ new THREE.Mesh( arrowGeometry, matRed ), [ 1, 0, 0 ], [ 0, 0, Math.PI / 2 ], null, 'bwd' ],
    			[ new THREE.Line( lineGeometry, matLineRed ) ]
    		],
    		Y: [
    			[ new THREE.Mesh( arrowGeometry, matGreen ), [ 0, 1, 0 ], null, null, 'fwd' ],
    			[ new THREE.Mesh( arrowGeometry, matGreen ), [ 0, 1, 0 ], [ Math.PI, 0, 0 ], null, 'bwd' ],
    			[ new THREE.Line( lineGeometry, matLineGreen ), null, [ 0, 0, Math.PI / 2 ]]
    		],
    		Z: [
    			[ new THREE.Mesh( arrowGeometry, matBlue ), [ 0, 0, 1 ], [ Math.PI / 2, 0, 0 ], null, 'fwd' ],
    			[ new THREE.Mesh( arrowGeometry, matBlue ), [ 0, 0, 1 ], [ - Math.PI / 2, 0, 0 ], null, 'bwd' ],
    			[ new THREE.Line( lineGeometry, matLineBlue ), null, [ 0, - Math.PI / 2, 0 ]]
    		],
    		XYZ: [
    			[ new THREE.Mesh( new THREE.OctahedronBufferGeometry( 0.1, 0 ), matWhiteTransparent.clone() ), [ 0, 0, 0 ], [ 0, 0, 0 ]]
    		],
    		XY: [
    			[ new THREE.Mesh( new THREE.PlaneBufferGeometry( 0.295, 0.295 ), matYellowTransparent.clone() ), [ 0.15, 0.15, 0 ]],
    			[ new THREE.Line( lineGeometry, matLineYellow ), [ 0.18, 0.3, 0 ], null, [ 0.125, 1, 1 ]],
    			[ new THREE.Line( lineGeometry, matLineYellow ), [ 0.3, 0.18, 0 ], [ 0, 0, Math.PI / 2 ], [ 0.125, 1, 1 ]]
    		],
    		YZ: [
    			[ new THREE.Mesh( new THREE.PlaneBufferGeometry( 0.295, 0.295 ), matCyanTransparent.clone() ), [ 0, 0.15, 0.15 ], [ 0, Math.PI / 2, 0 ]],
    			[ new THREE.Line( lineGeometry, matLineCyan ), [ 0, 0.18, 0.3 ], [ 0, 0, Math.PI / 2 ], [ 0.125, 1, 1 ]],
    			[ new THREE.Line( lineGeometry, matLineCyan ), [ 0, 0.3, 0.18 ], [ 0, - Math.PI / 2, 0 ], [ 0.125, 1, 1 ]]
    		],
    		XZ: [
    			[ new THREE.Mesh( new THREE.PlaneBufferGeometry( 0.295, 0.295 ), matMagentaTransparent.clone() ), [ 0.15, 0, 0.15 ], [ - Math.PI / 2, 0, 0 ]],
    			[ new THREE.Line( lineGeometry, matLineMagenta ), [ 0.18, 0, 0.3 ], null, [ 0.125, 1, 1 ]],
    			[ new THREE.Line( lineGeometry, matLineMagenta ), [ 0.3, 0, 0.18 ], [ 0, - Math.PI / 2, 0 ], [ 0.125, 1, 1 ]]
    		]
    	};
    
    	var pickerTranslate = {
    		X: [
    			[ new THREE.Mesh( new THREE.CylinderBufferGeometry( 0.2, 0, 1, 4, 1, false ), matInvisible ), [ 0.6, 0, 0 ], [ 0, 0, - Math.PI / 2 ]]
    		],
    		Y: [
    			[ new THREE.Mesh( new THREE.CylinderBufferGeometry( 0.2, 0, 1, 4, 1, false ), matInvisible ), [ 0, 0.6, 0 ]]
    		],
    		Z: [
    			[ new THREE.Mesh( new THREE.CylinderBufferGeometry( 0.2, 0, 1, 4, 1, false ), matInvisible ), [ 0, 0, 0.6 ], [ Math.PI / 2, 0, 0 ]]
    		],
    		XYZ: [
    			[ new THREE.Mesh( new THREE.OctahedronBufferGeometry( 0.2, 0 ), matInvisible ) ]
    		],
    		XY: [
    			[ new THREE.Mesh( new THREE.PlaneBufferGeometry( 0.4, 0.4 ), matInvisible ), [ 0.2, 0.2, 0 ]]
    		],
    		YZ: [
    			[ new THREE.Mesh( new THREE.PlaneBufferGeometry( 0.4, 0.4 ), matInvisible ), [ 0, 0.2, 0.2 ], [ 0, Math.PI / 2, 0 ]]
    		],
    		XZ: [
    			[ new THREE.Mesh( new THREE.PlaneBufferGeometry( 0.4, 0.4 ), matInvisible ), [ 0.2, 0, 0.2 ], [ - Math.PI / 2, 0, 0 ]]
    		]
    	};
    
    	var helperTranslate = {
    		START: [
    			[ new THREE.Mesh( new THREE.OctahedronBufferGeometry( 0.01, 2 ), matHelper ), null, null, null, 'helper' ]
    		],
    		END: [
    			[ new THREE.Mesh( new THREE.OctahedronBufferGeometry( 0.01, 2 ), matHelper ), null, null, null, 'helper' ]
    		],
    		DELTA: [
    			[ new THREE.Line( TranslateHelperGeometry(), matHelper ), null, null, null, 'helper' ]
    		],
    		X: [
    			[ new THREE.Line( lineGeometry, matHelper.clone() ), [ - 1e3, 0, 0 ], null, [ 1e6, 1, 1 ], 'helper' ]
    		],
    		Y: [
    			[ new THREE.Line( lineGeometry, matHelper.clone() ), [ 0, - 1e3, 0 ], [ 0, 0, Math.PI / 2 ], [ 1e6, 1, 1 ], 'helper' ]
    		],
    		Z: [
    			[ new THREE.Line( lineGeometry, matHelper.clone() ), [ 0, 0, - 1e3 ], [ 0, - Math.PI / 2, 0 ], [ 1e6, 1, 1 ], 'helper' ]
    		]
    	};
    
    	var gizmoRotate = {
    		X: [
    			[ new THREE.Line( CircleGeometry( 1, 0.5 ), matLineRed ) ],
    			[ new THREE.Mesh( new THREE.OctahedronBufferGeometry( 0.04, 0 ), matRed ), [ 0, 0, 0.99 ], null, [ 1, 3, 1 ]],
    		],
    		Y: [
    			[ new THREE.Line( CircleGeometry( 1, 0.5 ), matLineGreen ), null, [ 0, 0, - Math.PI / 2 ]],
    			[ new THREE.Mesh( new THREE.OctahedronBufferGeometry( 0.04, 0 ), matGreen ), [ 0, 0, 0.99 ], null, [ 3, 1, 1 ]],
    		],
    		Z: [
    			[ new THREE.Line( CircleGeometry( 1, 0.5 ), matLineBlue ), null, [ 0, Math.PI / 2, 0 ]],
    			[ new THREE.Mesh( new THREE.OctahedronBufferGeometry( 0.04, 0 ), matBlue ), [ 0.99, 0, 0 ], null, [ 1, 3, 1 ]],
    		],
    		E: [
    			[ new THREE.Line( CircleGeometry( 1.25, 1 ), matLineYellowTransparent ), null, [ 0, Math.PI / 2, 0 ]],
    			[ new THREE.Mesh( new THREE.CylinderBufferGeometry( 0.03, 0, 0.15, 4, 1, false ), matLineYellowTransparent ), [ 1.17, 0, 0 ], [ 0, 0, - Math.PI / 2 ], [ 1, 1, 0.001 ]],
    			[ new THREE.Mesh( new THREE.CylinderBufferGeometry( 0.03, 0, 0.15, 4, 1, false ), matLineYellowTransparent ), [ - 1.17, 0, 0 ], [ 0, 0, Math.PI / 2 ], [ 1, 1, 0.001 ]],
    			[ new THREE.Mesh( new THREE.CylinderBufferGeometry( 0.03, 0, 0.15, 4, 1, false ), matLineYellowTransparent ), [ 0, - 1.17, 0 ], [ Math.PI, 0, 0 ], [ 1, 1, 0.001 ]],
    			[ new THREE.Mesh( new THREE.CylinderBufferGeometry( 0.03, 0, 0.15, 4, 1, false ), matLineYellowTransparent ), [ 0, 1.17, 0 ], [ 0, 0, 0 ], [ 1, 1, 0.001 ]],
    		],
    		XYZE: [
    			[ new THREE.Line( CircleGeometry( 1, 1 ), matLineGray ), null, [ 0, Math.PI / 2, 0 ]]
    		]
    	};
    
    	var helperRotate = {
    		AXIS: [
    			[ new THREE.Line( lineGeometry, matHelper.clone() ), [ - 1e3, 0, 0 ], null, [ 1e6, 1, 1 ], 'helper' ]
    		]
    	};
    
    	var pickerRotate = {
    		X: [
    			[ new THREE.Mesh( new THREE.TorusBufferGeometry( 1, 0.1, 4, 24 ), matInvisible ), [ 0, 0, 0 ], [ 0, - Math.PI / 2, - Math.PI / 2 ]],
    		],
    		Y: [
    			[ new THREE.Mesh( new THREE.TorusBufferGeometry( 1, 0.1, 4, 24 ), matInvisible ), [ 0, 0, 0 ], [ Math.PI / 2, 0, 0 ]],
    		],
    		Z: [
    			[ new THREE.Mesh( new THREE.TorusBufferGeometry( 1, 0.1, 4, 24 ), matInvisible ), [ 0, 0, 0 ], [ 0, 0, - Math.PI / 2 ]],
    		],
    		E: [
    			[ new THREE.Mesh( new THREE.TorusBufferGeometry( 1.25, 0.1, 2, 24 ), matInvisible ) ]
    		],
    		XYZE: [
    			[ new THREE.Mesh( new THREE.SphereBufferGeometry( 0.7, 10, 8 ), matInvisible ) ]
    		]
    	};
    
    	var gizmoScale = {
    		X: [
    			[ new THREE.Mesh( scaleHandleGeometry, matRed ), [ 0.8, 0, 0 ], [ 0, 0, - Math.PI / 2 ]],
    			[ new THREE.Line( lineGeometry, matLineRed ), null, null, [ 0.8, 1, 1 ]]
    		],
    		Y: [
    			[ new THREE.Mesh( scaleHandleGeometry, matGreen ), [ 0, 0.8, 0 ]],
    			[ new THREE.Line( lineGeometry, matLineGreen ), null, [ 0, 0, Math.PI / 2 ], [ 0.8, 1, 1 ]]
    		],
    		Z: [
    			[ new THREE.Mesh( scaleHandleGeometry, matBlue ), [ 0, 0, 0.8 ], [ Math.PI / 2, 0, 0 ]],
    			[ new THREE.Line( lineGeometry, matLineBlue ), null, [ 0, - Math.PI / 2, 0 ], [ 0.8, 1, 1 ]]
    		],
    		XY: [
    			[ new THREE.Mesh( scaleHandleGeometry, matYellowTransparent ), [ 0.85, 0.85, 0 ], null, [ 2, 2, 0.2 ]],
    			[ new THREE.Line( lineGeometry, matLineYellow ), [ 0.855, 0.98, 0 ], null, [ 0.125, 1, 1 ]],
    			[ new THREE.Line( lineGeometry, matLineYellow ), [ 0.98, 0.855, 0 ], [ 0, 0, Math.PI / 2 ], [ 0.125, 1, 1 ]]
    		],
    		YZ: [
    			[ new THREE.Mesh( scaleHandleGeometry, matCyanTransparent ), [ 0, 0.85, 0.85 ], null, [ 0.2, 2, 2 ]],
    			[ new THREE.Line( lineGeometry, matLineCyan ), [ 0, 0.855, 0.98 ], [ 0, 0, Math.PI / 2 ], [ 0.125, 1, 1 ]],
    			[ new THREE.Line( lineGeometry, matLineCyan ), [ 0, 0.98, 0.855 ], [ 0, - Math.PI / 2, 0 ], [ 0.125, 1, 1 ]]
    		],
    		XZ: [
    			[ new THREE.Mesh( scaleHandleGeometry, matMagentaTransparent ), [ 0.85, 0, 0.85 ], null, [ 2, 0.2, 2 ]],
    			[ new THREE.Line( lineGeometry, matLineMagenta ), [ 0.855, 0, 0.98 ], null, [ 0.125, 1, 1 ]],
    			[ new THREE.Line( lineGeometry, matLineMagenta ), [ 0.98, 0, 0.855 ], [ 0, - Math.PI / 2, 0 ], [ 0.125, 1, 1 ]]
    		],
    		XYZX: [
    			[ new THREE.Mesh( new THREE.BoxBufferGeometry( 0.125, 0.125, 0.125 ), matWhiteTransparent.clone() ), [ 1.1, 0, 0 ]],
    		],
    		XYZY: [
    			[ new THREE.Mesh( new THREE.BoxBufferGeometry( 0.125, 0.125, 0.125 ), matWhiteTransparent.clone() ), [ 0, 1.1, 0 ]],
    		],
    		XYZZ: [
    			[ new THREE.Mesh( new THREE.BoxBufferGeometry( 0.125, 0.125, 0.125 ), matWhiteTransparent.clone() ), [ 0, 0, 1.1 ]],
    		]
    	};
    
    	var pickerScale = {
    		X: [
    			[ new THREE.Mesh( new THREE.CylinderBufferGeometry( 0.2, 0, 0.8, 4, 1, false ), matInvisible ), [ 0.5, 0, 0 ], [ 0, 0, - Math.PI / 2 ]]
    		],
    		Y: [
    			[ new THREE.Mesh( new THREE.CylinderBufferGeometry( 0.2, 0, 0.8, 4, 1, false ), matInvisible ), [ 0, 0.5, 0 ]]
    		],
    		Z: [
    			[ new THREE.Mesh( new THREE.CylinderBufferGeometry( 0.2, 0, 0.8, 4, 1, false ), matInvisible ), [ 0, 0, 0.5 ], [ Math.PI / 2, 0, 0 ]]
    		],
    		XY: [
    			[ new THREE.Mesh( scaleHandleGeometry, matInvisible ), [ 0.85, 0.85, 0 ], null, [ 3, 3, 0.2 ]],
    		],
    		YZ: [
    			[ new THREE.Mesh( scaleHandleGeometry, matInvisible ), [ 0, 0.85, 0.85 ], null, [ 0.2, 3, 3 ]],
    		],
    		XZ: [
    			[ new THREE.Mesh( scaleHandleGeometry, matInvisible ), [ 0.85, 0, 0.85 ], null, [ 3, 0.2, 3 ]],
    		],
    		XYZX: [
    			[ new THREE.Mesh( new THREE.BoxBufferGeometry( 0.2, 0.2, 0.2 ), matInvisible ), [ 1.1, 0, 0 ]],
    		],
    		XYZY: [
    			[ new THREE.Mesh( new THREE.BoxBufferGeometry( 0.2, 0.2, 0.2 ), matInvisible ), [ 0, 1.1, 0 ]],
    		],
    		XYZZ: [
    			[ new THREE.Mesh( new THREE.BoxBufferGeometry( 0.2, 0.2, 0.2 ), matInvisible ), [ 0, 0, 1.1 ]],
    		]
    	};
    
    	var helperScale = {
    		X: [
    			[ new THREE.Line( lineGeometry, matHelper.clone() ), [ - 1e3, 0, 0 ], null, [ 1e6, 1, 1 ], 'helper' ]
    		],
    		Y: [
    			[ new THREE.Line( lineGeometry, matHelper.clone() ), [ 0, - 1e3, 0 ], [ 0, 0, Math.PI / 2 ], [ 1e6, 1, 1 ], 'helper' ]
    		],
    		Z: [
    			[ new THREE.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 THREE.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 THREE.Vector3( 0, 0, 0 );
    	var tempEuler = new THREE.Euler();
    	var alignVector = new THREE.Vector3( 0, 1, 0 );
    	var zeroVector = new THREE.Vector3( 0, 0, 0 );
    	var lookAtMatrix = new THREE.Matrix4();
    	var tempQuaternion = new THREE.Quaternion();
    	var tempQuaternion2 = new THREE.Quaternion();
    	var identityQuaternion = new THREE.Quaternion();
    
    	var unitX = new THREE.Vector3( 1, 0, 0 );
    	var unitY = new THREE.Vector3( 0, 1, 0 );
    	var unitZ = new THREE.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().inverse() );
    					handle.scale.copy( tempVector );
    					handle.visible = this.dragging;
    
    				} else {
    
    					handle.quaternion.copy( quaternion );
    
    					if ( this.dragging ) {
    
    						handle.position.copy( this.worldPositionStart );
    
    					} else {
    
    						handle.position.copy( this.worldPosition );
    
    					}
    
    					if ( this.axis ) {
    
    						handle.visible = this.axis.search( handle.name ) !== - 1;
    
    					}
    
    				}
    
    				// If updating helper, skip rest of the loop
    				continue;
    
    			}
    
    			// Align handles to current local or world rotation
    
    			handle.quaternion.copy( quaternion );
    
    			if ( this.mode === 'translate' || this.mode === 'scale' ) {
    
    				// Hide translate and scale axis facing the camera
    
    				var AXIS_HIDE_TRESHOLD = 0.99;
    				var PLANE_HIDE_TRESHOLD = 0.2;
    				var AXIS_FLIP_TRESHOLD = 0.0;
    
    
    				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 ).inverse() );
    
    				if ( handle.name.search( "E" ) !== - 1 ) {
    
    					handle.quaternion.setFromRotationMatrix( lookAtMatrix.lookAt( this.eye, zeroVector, unitY ) );
    
    				}
    
    				if ( handle.name === 'X' ) {
    
    					tempQuaternion.setFromAxisAngle( unitX, Math.atan2( - alignVector.y, alignVector.z ) );
    					tempQuaternion.multiplyQuaternions( tempQuaternion2, tempQuaternion );
    					handle.quaternion.copy( tempQuaternion );
    
    				}
    
    				if ( handle.name === 'Y' ) {
    
    					tempQuaternion.setFromAxisAngle( unitY, Math.atan2( alignVector.x, alignVector.z ) );
    					tempQuaternion.multiplyQuaternions( tempQuaternion2, tempQuaternion );
    					handle.quaternion.copy( tempQuaternion );
    
    				}
    
    				if ( handle.name === 'Z' ) {
    
    					tempQuaternion.setFromAxisAngle( unitZ, Math.atan2( alignVector.y, alignVector.x ) );
    					tempQuaternion.multiplyQuaternions( tempQuaternion2, tempQuaternion );
    					handle.quaternion.copy( tempQuaternion );
    
    				}
    
    			}
    
    			// Hide disabled axes
    			handle.visible = handle.visible && ( handle.name.indexOf( "X" ) === - 1 || this.showX );
    			handle.visible = handle.visible && ( handle.name.indexOf( "Y" ) === - 1 || this.showY );
    			handle.visible = handle.visible && ( handle.name.indexOf( "Z" ) === - 1 || this.showZ );
    			handle.visible = handle.visible && ( handle.name.indexOf( "E" ) === - 1 || ( this.showX && this.showY && this.showZ ) );
    
    			// highlight selected axis
    
    			handle.material._opacity = handle.material._opacity || handle.material.opacity;
    			handle.material._color = handle.material._color || handle.material.color.clone();
    
    			handle.material.color.copy( handle.material._color );
    			handle.material.opacity = handle.material._opacity;
    
    			if ( ! this.enabled ) {
    
    				handle.material.opacity *= 0.5;
    				handle.material.color.lerp( new THREE.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 THREE.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 THREE.Color( 1, 1, 1 ), 0.5 );
    
    				} else {
    
    					handle.material.opacity *= 0.25;
    					handle.material.color.lerp( new THREE.Color( 1, 1, 1 ), 0.5 );
    
    				}
    
    			}
    
    		}
    
    		THREE.Object3D.prototype.updateMatrixWorld.call( this );
    
    	};
    
    };
    
    THREE.TransformControlsGizmo.prototype = Object.assign( Object.create( THREE.Object3D.prototype ), {
    
    	constructor: THREE.TransformControlsGizmo,
    
    	isTransformControlsGizmo: true
    
    } );
    
    
    THREE.TransformControlsPlane = function () {
    
    	'use strict';
    
    	THREE.Mesh.call( this,
    		new THREE.PlaneBufferGeometry( 100000, 100000, 2, 2 ),
    		new THREE.MeshBasicMaterial( { visible: false, wireframe: true, side: THREE.DoubleSide, transparent: true, opacity: 0.1, toneMapped: false } )
    	);
    
    	this.type = 'TransformControlsPlane';
    
    	var unitX = new THREE.Vector3( 1, 0, 0 );
    	var unitY = new THREE.Vector3( 0, 1, 0 );
    	var unitZ = new THREE.Vector3( 0, 0, 1 );
    
    	var tempVector = new THREE.Vector3();
    	var dirVector = new THREE.Vector3();
    	var alignVector = new THREE.Vector3();
    	var tempMatrix = new THREE.Matrix4();
    	var identityQuaternion = new THREE.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 );
    
    		}
    
    		THREE.Object3D.prototype.updateMatrixWorld.call( this );
    
    	};
    
    };
    
    THREE.TransformControlsPlane.prototype = Object.assign( Object.create( THREE.Mesh.prototype ), {
    
    	constructor: THREE.TransformControlsPlane,
    
    	isTransformControlsPlane: true
    
    } );