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/**

* @author Eberhard Graether / http://egraether.com/

* @author Mark Lundin / http://mark-lundin.com

* @author Simone Manini / http://daron1337.github.io

* @author Luca Antiga / http://lantiga.github.io

THREE.TrackballControls = function ( object, domElement ) {

var _this = this;

var STATE = { NONE: - 1, ROTATE: 0, ZOOM: 1, PAN: 2, TOUCH_ROTATE: 3, TOUCH_ZOOM_PAN: 4 };

this.object = object;

this.domElement = ( domElement !== undefined ) ? domElement : document;

// API

this.enabled = true;

this.screen = { left: 0, top: 0, width: 0, height: 0 };

this.rotateSpeed = 1.0;

this.rotateSpeed = 0.66;

this.zoomSpeed = 1.2;

this.panSpeed = 0.3;

this.panSpeed = 0.2;

this.noRotate = false;

this.noZoom = false;

this.noZoom = true;

this.noPan = false;

this.staticMoving = false;

this.dynamicDampingFactor = 0.2;

this.minDistance = 0;

this.maxDistance = Infinity;

this.keys = [ 65 /*A*/, 83 /*S*/, 68 /*D*/ ];

// internals

this.target = new THREE.Vector3();

var EPS = 0.000001;

var lastPosition = new THREE.Vector3();

var _state = STATE.NONE,

var _state = STATE.ROTATE,

_prevState = STATE.NONE,

_eye = new THREE.Vector3(),

_movePrev = new THREE.Vector2(),

_moveCurr = new THREE.Vector2(),

_lastAxis = new THREE.Vector3(),

_lastAngle = 0,

_zoomStart = new THREE.Vector2(),

_zoomEnd = new THREE.Vector2(),

_touchZoomDistanceStart = 0,

_touchZoomDistanceEnd = 0,

_panStart = new THREE.Vector2(),

_panEnd = new THREE.Vector2();

// for reset

this.target0 = this.target.clone();

this.position0 = this.object.position.clone();

this.up0 = this.object.up.clone();

// events

var changeEvent = { type: 'change' };

var startEvent = { type: 'start' };

var endEvent = { type: 'end' };

// methods

this.handleResize = function () {

if ( this.domElement === document ) {

this.screen.left = 0;

this.screen.top = 0;

this.screen.width = window.innerWidth;

this.screen.height = window.innerHeight;

} else {

var box = this.domElement.getBoundingClientRect();

// adjustments come from similar code in the jquery offset() function

var d = this.domElement.ownerDocument.documentElement;

this.screen.left = box.left + window.pageXOffset - d.clientLeft;

this.screen.top = box.top + window.pageYOffset - d.clientTop;

this.screen.width = box.width;

this.screen.height = box.height;

}

};

this.handleEvent = function ( event ) {

if ( typeof this[ event.type ] == 'function' ) {

this[ event.type ]( event );

}

};

var getMouseOnScreen = ( function () {

var vector = new THREE.Vector2();

return function getMouseOnScreen( pageX, pageY ) {

vector.set(

( pageX - _this.screen.left ) / _this.screen.width,

( pageY - _this.screen.top ) / _this.screen.height

);

return vector;

};

}() );

var getMouseOnCircle = ( function () {

var vector = new THREE.Vector2();

return function getMouseOnCircle( pageX, pageY ) {

vector.set(

( ( pageX - _this.screen.width * 0.5 - _this.screen.left ) / ( _this.screen.width * 0.5 ) ),

( ( _this.screen.height + 2 * ( _this.screen.top - pageY ) ) / _this.screen.width ) // screen.width intentional

);

return vector;

};

}() );

this.rotateCamera = ( function () {

var axis = new THREE.Vector3(),

quaternion = new THREE.Quaternion(),

eyeDirection = new THREE.Vector3(),

objectUpDirection = new THREE.Vector3(),

objectSidewaysDirection = new THREE.Vector3(),

moveDirection = new THREE.Vector3(),

angle;

return function rotateCamera() {

moveDirection.set( _moveCurr.x - _movePrev.x, _moveCurr.y - _movePrev.y, 0 );

angle = moveDirection.length();

if ( angle ) {

_eye.copy( _this.object.position ).sub( _this.target );

eyeDirection.copy( _eye ).normalize();

objectUpDirection.copy( _this.object.up ).normalize();

objectSidewaysDirection.crossVectors( objectUpDirection, eyeDirection ).normalize();

objectUpDirection.setLength( _moveCurr.y - _movePrev.y );

objectSidewaysDirection.setLength( _moveCurr.x - _movePrev.x );

moveDirection.copy( objectUpDirection.add( objectSidewaysDirection ) );

axis.crossVectors( moveDirection, _eye ).normalize();

angle *= _this.rotateSpeed;

quaternion.setFromAxisAngle( axis, angle );

_eye.applyQuaternion( quaternion );

_this.object.up.applyQuaternion( quaternion );

_lastAxis.copy( axis );

_lastAngle = angle;

} else if ( ! _this.staticMoving && _lastAngle ) {

_lastAngle *= Math.sqrt( 1.0 - _this.dynamicDampingFactor );

_eye.copy( _this.object.position ).sub( _this.target );

quaternion.setFromAxisAngle( _lastAxis, _lastAngle );

_eye.applyQuaternion( quaternion );

_this.object.up.applyQuaternion( quaternion );

}

_movePrev.copy( _moveCurr );

};

}() );

this.zoomCamera = function () {

var factor;

if ( _state === STATE.TOUCH_ZOOM_PAN ) {

factor = _touchZoomDistanceStart / _touchZoomDistanceEnd;

_touchZoomDistanceStart = _touchZoomDistanceEnd;

_eye.multiplyScalar( factor );

} else {

factor = 1.0 + ( _zoomEnd.y - _zoomStart.y ) * _this.zoomSpeed;

if ( factor !== 1.0 && factor > 0.0 ) {

_eye.multiplyScalar( factor );

}

if ( _this.staticMoving ) {

_zoomStart.copy( _zoomEnd );

} else {

_zoomStart.y += ( _zoomEnd.y - _zoomStart.y ) * this.dynamicDampingFactor;

}

};

this.panCamera = ( function () {

var mouseChange = new THREE.Vector2(),

objectUp = new THREE.Vector3(),

pan = new THREE.Vector3();

return function panCamera() {

mouseChange.copy( _panEnd ).sub( _panStart );

if ( mouseChange.lengthSq() ) {

mouseChange.multiplyScalar( _eye.length() * _this.panSpeed );

pan.copy( _eye ).cross( _this.object.up ).setLength( mouseChange.x );

pan.add( objectUp.copy( _this.object.up ).setLength( mouseChange.y ) );

_this.object.position.add( pan );

_this.target.add( pan );

if ( _this.staticMoving ) {

_panStart.copy( _panEnd );

} else {

_panStart.add( mouseChange.subVectors( _panEnd, _panStart ).multiplyScalar( _this.dynamicDampingFactor ) );

}

};

}() );

this.checkDistances = function () {

if ( ! _this.noZoom || ! _this.noPan ) {

if ( _eye.lengthSq() > _this.maxDistance * _this.maxDistance ) {

_this.object.position.addVectors( _this.target, _eye.setLength( _this.maxDistance ) );

_zoomStart.copy( _zoomEnd );

}

if ( _eye.lengthSq() < _this.minDistance * _this.minDistance ) {

_this.object.position.addVectors( _this.target, _eye.setLength( _this.minDistance ) );

_zoomStart.copy( _zoomEnd );

}

};

this.update = function () {

_eye.subVectors( _this.object.position, _this.target );

if ( ! _this.noRotate ) {

_this.rotateCamera();

}

if ( ! _this.noZoom ) {

_this.zoomCamera();

}

if ( ! _this.noPan ) {

_this.panCamera();

}

_this.object.position.addVectors( _this.target, _eye );

_this.checkDistances();

_this.object.lookAt( _this.target );

if ( lastPosition.distanceToSquared( _this.object.position ) > EPS ) {

_this.dispatchEvent( changeEvent );

lastPosition.copy( _this.object.position );

}

};

this.reset = function () {

_state = STATE.NONE;

_prevState = STATE.NONE;

_this.target.copy( _this.target0 );

_this.object.position.copy( _this.position0 );

_this.object.up.copy( _this.up0 );

_eye.subVectors( _this.object.position, _this.target );

_this.object.lookAt( _this.target );

_this.dispatchEvent( changeEvent );

lastPosition.copy( _this.object.position );

};

// listeners

function keydown( event ) {

if ( _this.enabled === false ) return;

window.removeEventListener( 'keydown', keydown );

_prevState = _state;

if ( _state !== STATE.NONE ) {

return;

} else if ( event.keyCode === _this.keys[ STATE.ROTATE ] && ! _this.noRotate ) {

_state = STATE.ROTATE;

} else if ( event.keyCode === _this.keys[ STATE.ZOOM ] && ! _this.noZoom ) {

_state = STATE.ZOOM;

} else if ( event.keyCode === _this.keys[ STATE.PAN ] && ! _this.noPan ) {

_state = STATE.PAN;

}

function keyup( event ) {

if ( _this.enabled === false ) return;

_state = _prevState;

window.addEventListener( 'keydown', keydown, false );

}

function mousedown( event ) {

if ( _this.enabled === false ) return;

event.preventDefault();

event.stopPropagation();

if ( _state === STATE.NONE ) {

_state = event.button;

}

if ( _state === STATE.ROTATE && ! _this.noRotate ) {

_moveCurr.copy( getMouseOnCircle( event.pageX, event.pageY ) );

_movePrev.copy( _moveCurr );

} else if ( _state === STATE.ZOOM && ! _this.noZoom ) {

_zoomStart.copy( getMouseOnScreen( event.pageX, event.pageY ) );

_zoomEnd.copy( _zoomStart );

} else if ( _state === STATE.PAN && ! _this.noPan ) {

_panStart.copy( getMouseOnScreen( event.pageX, event.pageY ) );

_panEnd.copy( _panStart );

}

document.addEventListener( 'mousemove', mousemove, false );

//document.addEventListener( 'mousemove', mousemove, false );

document.addEventListener( 'mouseup', mouseup, false );

//document.addEventListener( 'mouseup', mouseup, false );

_this.dispatchEvent( startEvent );

}

function mousemove( event ) {

if ( _this.enabled === false ) return;

event.preventDefault();

event.stopPropagation();

if ( _state === STATE.ROTATE && ! _this.noRotate ) {

_movePrev.copy( _moveCurr );

_moveCurr.copy( getMouseOnCircle( event.pageX, event.pageY ) );

} else if ( _state === STATE.ZOOM && ! _this.noZoom ) {

_zoomEnd.copy( getMouseOnScreen( event.pageX, event.pageY ) );

} else if ( _state === STATE.PAN && ! _this.noPan ) {

_panEnd.copy( getMouseOnScreen( event.pageX, event.pageY ) );

}

function mouseup( event ) {

if ( _this.enabled === false ) return;

event.preventDefault();

event.stopPropagation();

_state = STATE.NONE;

//_state = STATE.NONE;

document.removeEventListener( 'mousemove', mousemove );

//document.removeEventListener( 'mousemove', mousemove );

document.removeEventListener( 'mouseup', mouseup );

//document.removeEventListener( 'mouseup', mouseup );

_this.dispatchEvent( endEvent );

}

function mousewheel( event ) {

if ( _this.enabled === false ) return;

if ( _this.noZoom === true ) return;

event.preventDefault();

event.stopPropagation();

switch ( event.deltaMode ) {

case 2:

// Zoom in pages

_zoomStart.y -= event.deltaY * 0.025;

break;

case 1:

// Zoom in lines

_zoomStart.y -= event.deltaY * 0.01;

break;

default:

// undefined, 0, assume pixels

_zoomStart.y -= event.deltaY * 0.00025;

break;

}

_this.dispatchEvent( startEvent );

_this.dispatchEvent( endEvent );

}

function touchstart( event ) {

if ( _this.enabled === false ) return;

switch ( event.touches.length ) {

case 1:

_state = STATE.TOUCH_ROTATE;

_moveCurr.copy( getMouseOnCircle( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY ) );

_movePrev.copy( _moveCurr );

break;

default: // 2 or more

_state = STATE.TOUCH_ZOOM_PAN;

var dx = event.touches[ 0 ].pageX - event.touches[ 1 ].pageX;

var dy = event.touches[ 0 ].pageY - event.touches[ 1 ].pageY;

_touchZoomDistanceEnd = _touchZoomDistanceStart = Math.sqrt( dx * dx + dy * dy );

var x = ( event.touches[ 0 ].pageX + event.touches[ 1 ].pageX ) / 2;

var y = ( event.touches[ 0 ].pageY + event.touches[ 1 ].pageY ) / 2;

_panStart.copy( getMouseOnScreen( x, y ) );

_panEnd.copy( _panStart );

break;

}

_this.dispatchEvent( startEvent );

}

function touchmove( event ) {

if ( _this.enabled === false ) return;

event.preventDefault();

event.stopPropagation();

switch ( event.touches.length ) {

case 1:

_movePrev.copy( _moveCurr );

_moveCurr.copy( getMouseOnCircle( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY ) );

break;

default: // 2 or more

var dx = event.touches[ 0 ].pageX - event.touches[ 1 ].pageX;

var dy = event.touches[ 0 ].pageY - event.touches[ 1 ].pageY;

_touchZoomDistanceEnd = Math.sqrt( dx * dx + dy * dy );

var x = ( event.touches[ 0 ].pageX + event.touches[ 1 ].pageX ) / 2;

var y = ( event.touches[ 0 ].pageY + event.touches[ 1 ].pageY ) / 2;

_panEnd.copy( getMouseOnScreen( x, y ) );

break;

}

function touchend( event ) {

if ( _this.enabled === false ) return;

switch ( event.touches.length ) {

case 0:

_state = STATE.NONE;

break;

case 1:

_state = STATE.TOUCH_ROTATE;

_moveCurr.copy( getMouseOnCircle( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY ) );

_movePrev.copy( _moveCurr );

break;

}

_this.dispatchEvent( endEvent );

}

function contextmenu( event ) {

if ( _this.enabled === false ) return;

event.preventDefault();

}

this.dispose = function () {

this.domElement.removeEventListener( 'contextmenu', contextmenu, false );

this.domElement.removeEventListener( 'mousedown', mousedown, false );

this.domElement.removeEventListener( 'wheel', mousewheel, false );

this.domElement.removeEventListener( 'touchstart', touchstart, false );

this.domElement.removeEventListener( 'touchend', touchend, false );

this.domElement.removeEventListener( 'touchmove', touchmove, false );

document.removeEventListener( 'mousemove', mousemove, false );

document.removeEventListener( 'mouseup', mouseup, false );

window.removeEventListener( 'keydown', keydown, false );

window.removeEventListener( 'keyup', keyup, false );

};

this.domElement.addEventListener( 'contextmenu', contextmenu, false );

this.domElement.addEventListener( 'mousedown', mousedown, false );

this.domElement.addEventListener( 'wheel', mousewheel, false );

this.domElement.addEventListener( 'touchstart', touchstart, false );

this.domElement.addEventListener( 'touchend', touchend, false );

this.domElement.addEventListener( 'touchmove', touchmove, false );

window.addEventListener( 'keydown', keydown, false );

window.addEventListener( 'keyup', keyup, false );

this.handleResize();

// force an update at start

this.update();

document.addEventListener( 'mousemove', mousemove, false );

document.addEventListener( 'mouseup', mouseup, false );

};

THREE.TrackballControls.prototype = Object.create( THREE.EventDispatcher.prototype );

THREE.TrackballControls.prototype.constructor = THREE.TrackballControls;

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/**
 * @author Eberhard Graether / http://egraether.com/
 * @author Mark Lundin 	/ http://mark-lundin.com
 * @author Simone Manini / http://daron1337.github.io
 * @author Luca Antiga 	/ http://lantiga.github.io
 */

THREE.TrackballControls = function ( object, domElement ) {

var _this = this;
	var STATE = { NONE: - 1, ROTATE: 0, ZOOM: 1, PAN: 2, TOUCH_ROTATE: 3, TOUCH_ZOOM_PAN: 4 };

this.object = object;
	this.domElement = ( domElement !== undefined ) ? domElement : document;

// API

this.enabled = true;

this.screen = { left: 0, top: 0, width: 0, height: 0 };

this.rotateSpeed = 1.0;
	this.zoomSpeed = 1.2;
	this.panSpeed = 0.3;

this.noRotate = false;
	this.noZoom = false;
	this.noPan = false;

this.staticMoving = false;
	this.dynamicDampingFactor = 0.2;

this.minDistance = 0;
	this.maxDistance = Infinity;

this.keys = [ 65 /*A*/, 83 /*S*/, 68 /*D*/ ];

// internals

this.target = new THREE.Vector3();

var EPS = 0.000001;

var lastPosition = new THREE.Vector3();

var _state = STATE.NONE,
		_prevState = STATE.NONE,

_eye = new THREE.Vector3(),

_movePrev = new THREE.Vector2(),
		_moveCurr = new THREE.Vector2(),

_lastAxis = new THREE.Vector3(),
		_lastAngle = 0,

_zoomStart = new THREE.Vector2(),
		_zoomEnd = new THREE.Vector2(),

_touchZoomDistanceStart = 0,
		_touchZoomDistanceEnd = 0,

_panStart = new THREE.Vector2(),
		_panEnd = new THREE.Vector2();

// for reset

this.target0 = this.target.clone();
	this.position0 = this.object.position.clone();
	this.up0 = this.object.up.clone();

// events

var changeEvent = { type: 'change' };
	var startEvent = { type: 'start' };
	var endEvent = { type: 'end' };

// methods

this.handleResize = function () {

if ( this.domElement === document ) {

this.screen.left = 0;
			this.screen.top = 0;
			this.screen.width = window.innerWidth;
			this.screen.height = window.innerHeight;

} else {

var box = this.domElement.getBoundingClientRect();
			// adjustments come from similar code in the jquery offset() function
			var d = this.domElement.ownerDocument.documentElement;
			this.screen.left = box.left + window.pageXOffset - d.clientLeft;
			this.screen.top = box.top + window.pageYOffset - d.clientTop;
			this.screen.width = box.width;
			this.screen.height = box.height;

}

};

this.handleEvent = function ( event ) {

if ( typeof this[ event.type ] == 'function' ) {

this[ event.type ]( event );

}

};

var getMouseOnScreen = ( function () {

var vector = new THREE.Vector2();

return function getMouseOnScreen( pageX, pageY ) {

vector.set(
				( pageX - _this.screen.left ) / _this.screen.width,
				( pageY - _this.screen.top ) / _this.screen.height
			);

return vector;

};

}() );

var getMouseOnCircle = ( function () {

var vector = new THREE.Vector2();

return function getMouseOnCircle( pageX, pageY ) {

vector.set(
				( ( pageX - _this.screen.width * 0.5 - _this.screen.left ) / ( _this.screen.width * 0.5 ) ),
				( ( _this.screen.height + 2 * ( _this.screen.top - pageY ) ) / _this.screen.width ) // screen.width intentional
			);

return vector;

};

}() );

this.rotateCamera = ( function () {

var axis = new THREE.Vector3(),
			quaternion = new THREE.Quaternion(),
			eyeDirection = new THREE.Vector3(),
			objectUpDirection = new THREE.Vector3(),
			objectSidewaysDirection = new THREE.Vector3(),
			moveDirection = new THREE.Vector3(),
			angle;

return function rotateCamera() {

moveDirection.set( _moveCurr.x - _movePrev.x, _moveCurr.y - _movePrev.y, 0 );
			angle = moveDirection.length();

if ( angle ) {

_eye.copy( _this.object.position ).sub( _this.target );

eyeDirection.copy( _eye ).normalize();
				objectUpDirection.copy( _this.object.up ).normalize();
				objectSidewaysDirection.crossVectors( objectUpDirection, eyeDirection ).normalize();

objectUpDirection.setLength( _moveCurr.y - _movePrev.y );
				objectSidewaysDirection.setLength( _moveCurr.x - _movePrev.x );

moveDirection.copy( objectUpDirection.add( objectSidewaysDirection ) );

axis.crossVectors( moveDirection, _eye ).normalize();

angle *= _this.rotateSpeed;
				quaternion.setFromAxisAngle( axis, angle );

_eye.applyQuaternion( quaternion );
				_this.object.up.applyQuaternion( quaternion );

_lastAxis.copy( axis );
				_lastAngle = angle;

} else if ( ! _this.staticMoving && _lastAngle ) {

_lastAngle *= Math.sqrt( 1.0 - _this.dynamicDampingFactor );
				_eye.copy( _this.object.position ).sub( _this.target );
				quaternion.setFromAxisAngle( _lastAxis, _lastAngle );
				_eye.applyQuaternion( quaternion );
				_this.object.up.applyQuaternion( quaternion );

}

_movePrev.copy( _moveCurr );

};

}() );

this.zoomCamera = function () {

var factor;

if ( _state === STATE.TOUCH_ZOOM_PAN ) {

factor = _touchZoomDistanceStart / _touchZoomDistanceEnd;
			_touchZoomDistanceStart = _touchZoomDistanceEnd;
			_eye.multiplyScalar( factor );

} else {

factor = 1.0 + ( _zoomEnd.y - _zoomStart.y ) * _this.zoomSpeed;

if ( factor !== 1.0 && factor > 0.0 ) {

_eye.multiplyScalar( factor );

}

if ( _this.staticMoving ) {

_zoomStart.copy( _zoomEnd );

} else {

_zoomStart.y += ( _zoomEnd.y - _zoomStart.y ) * this.dynamicDampingFactor;

}

};

this.panCamera = ( function () {

var mouseChange = new THREE.Vector2(),
			objectUp = new THREE.Vector3(),
			pan = new THREE.Vector3();

return function panCamera() {

mouseChange.copy( _panEnd ).sub( _panStart );

if ( mouseChange.lengthSq() ) {

mouseChange.multiplyScalar( _eye.length() * _this.panSpeed );

pan.copy( _eye ).cross( _this.object.up ).setLength( mouseChange.x );
				pan.add( objectUp.copy( _this.object.up ).setLength( mouseChange.y ) );

_this.object.position.add( pan );
				_this.target.add( pan );

if ( _this.staticMoving ) {

_panStart.copy( _panEnd );

} else {

_panStart.add( mouseChange.subVectors( _panEnd, _panStart ).multiplyScalar( _this.dynamicDampingFactor ) );

}

};

}() );

this.checkDistances = function () {

if ( ! _this.noZoom || ! _this.noPan ) {

if ( _eye.lengthSq() > _this.maxDistance * _this.maxDistance ) {

_this.object.position.addVectors( _this.target, _eye.setLength( _this.maxDistance ) );
				_zoomStart.copy( _zoomEnd );

}

if ( _eye.lengthSq() < _this.minDistance * _this.minDistance ) {

_this.object.position.addVectors( _this.target, _eye.setLength( _this.minDistance ) );
				_zoomStart.copy( _zoomEnd );

}

};

this.update = function () {

_eye.subVectors( _this.object.position, _this.target );

if ( ! _this.noRotate ) {

_this.rotateCamera();

}

if ( ! _this.noZoom ) {

_this.zoomCamera();

}

if ( ! _this.noPan ) {

_this.panCamera();

}

_this.object.position.addVectors( _this.target, _eye );

_this.checkDistances();

_this.object.lookAt( _this.target );

if ( lastPosition.distanceToSquared( _this.object.position ) > EPS ) {

_this.dispatchEvent( changeEvent );

lastPosition.copy( _this.object.position );

}

};

this.reset = function () {

_state = STATE.NONE;
		_prevState = STATE.NONE;

_this.target.copy( _this.target0 );
		_this.object.position.copy( _this.position0 );
		_this.object.up.copy( _this.up0 );

_eye.subVectors( _this.object.position, _this.target );

_this.object.lookAt( _this.target );

_this.dispatchEvent( changeEvent );

lastPosition.copy( _this.object.position );

};

// listeners

function keydown( event ) {

if ( _this.enabled === false ) return;

window.removeEventListener( 'keydown', keydown );

_prevState = _state;

if ( _state !== STATE.NONE ) {

return;

} else if ( event.keyCode === _this.keys[ STATE.ROTATE ] && ! _this.noRotate ) {

_state = STATE.ROTATE;

} else if ( event.keyCode === _this.keys[ STATE.ZOOM ] && ! _this.noZoom ) {

_state = STATE.ZOOM;

} else if ( event.keyCode === _this.keys[ STATE.PAN ] && ! _this.noPan ) {

_state = STATE.PAN;

}

function keyup( event ) {

if ( _this.enabled === false ) return;

_state = _prevState;

window.addEventListener( 'keydown', keydown, false );

}

function mousedown( event ) {

if ( _this.enabled === false ) return;

event.preventDefault();
		event.stopPropagation();

if ( _state === STATE.NONE ) {

_state = event.button;

}

if ( _state === STATE.ROTATE && ! _this.noRotate ) {

_moveCurr.copy( getMouseOnCircle( event.pageX, event.pageY ) );
			_movePrev.copy( _moveCurr );

} else if ( _state === STATE.ZOOM && ! _this.noZoom ) {

_zoomStart.copy( getMouseOnScreen( event.pageX, event.pageY ) );
			_zoomEnd.copy( _zoomStart );

} else if ( _state === STATE.PAN && ! _this.noPan ) {

_panStart.copy( getMouseOnScreen( event.pageX, event.pageY ) );
			_panEnd.copy( _panStart );

}

document.addEventListener( 'mousemove', mousemove, false );
		document.addEventListener( 'mouseup', mouseup, false );

_this.dispatchEvent( startEvent );

}

function mousemove( event ) {

if ( _this.enabled === false ) return;

event.preventDefault();
		event.stopPropagation();

if ( _state === STATE.ROTATE && ! _this.noRotate ) {

_movePrev.copy( _moveCurr );
			_moveCurr.copy( getMouseOnCircle( event.pageX, event.pageY ) );

} else if ( _state === STATE.ZOOM && ! _this.noZoom ) {

_zoomEnd.copy( getMouseOnScreen( event.pageX, event.pageY ) );

} else if ( _state === STATE.PAN && ! _this.noPan ) {

_panEnd.copy( getMouseOnScreen( event.pageX, event.pageY ) );

}

function mouseup( event ) {

if ( _this.enabled === false ) return;

event.preventDefault();
		event.stopPropagation();

_state = STATE.NONE;

document.removeEventListener( 'mousemove', mousemove );
		document.removeEventListener( 'mouseup', mouseup );
		_this.dispatchEvent( endEvent );

}

function mousewheel( event ) {

if ( _this.enabled === false ) return;

if ( _this.noZoom === true ) return;

event.preventDefault();
		event.stopPropagation();

switch ( event.deltaMode ) {

case 2:
				// Zoom in pages
				_zoomStart.y -= event.deltaY * 0.025;
				break;

case 1:
				// Zoom in lines
				_zoomStart.y -= event.deltaY * 0.01;
				break;

default:
				// undefined, 0, assume pixels
				_zoomStart.y -= event.deltaY * 0.00025;
				break;

}

_this.dispatchEvent( startEvent );
		_this.dispatchEvent( endEvent );

}

function touchstart( event ) {

if ( _this.enabled === false ) return;

switch ( event.touches.length ) {

case 1:
				_state = STATE.TOUCH_ROTATE;
				_moveCurr.copy( getMouseOnCircle( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY ) );
				_movePrev.copy( _moveCurr );
				break;

default: // 2 or more
				_state = STATE.TOUCH_ZOOM_PAN;
				var dx = event.touches[ 0 ].pageX - event.touches[ 1 ].pageX;
				var dy = event.touches[ 0 ].pageY - event.touches[ 1 ].pageY;
				_touchZoomDistanceEnd = _touchZoomDistanceStart = Math.sqrt( dx * dx + dy * dy );

var x = ( event.touches[ 0 ].pageX + event.touches[ 1 ].pageX ) / 2;
				var y = ( event.touches[ 0 ].pageY + event.touches[ 1 ].pageY ) / 2;
				_panStart.copy( getMouseOnScreen( x, y ) );
				_panEnd.copy( _panStart );
				break;

}

_this.dispatchEvent( startEvent );

}

function touchmove( event ) {

if ( _this.enabled === false ) return;

event.preventDefault();
		event.stopPropagation();

switch ( event.touches.length ) {

case 1:
				_movePrev.copy( _moveCurr );
				_moveCurr.copy( getMouseOnCircle( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY ) );
				break;

default: // 2 or more
				var dx = event.touches[ 0 ].pageX - event.touches[ 1 ].pageX;
				var dy = event.touches[ 0 ].pageY - event.touches[ 1 ].pageY;
				_touchZoomDistanceEnd = Math.sqrt( dx * dx + dy * dy );

var x = ( event.touches[ 0 ].pageX + event.touches[ 1 ].pageX ) / 2;
				var y = ( event.touches[ 0 ].pageY + event.touches[ 1 ].pageY ) / 2;
				_panEnd.copy( getMouseOnScreen( x, y ) );
				break;

}

function touchend( event ) {

if ( _this.enabled === false ) return;

switch ( event.touches.length ) {

case 0:
				_state = STATE.NONE;
				break;

case 1:
				_state = STATE.TOUCH_ROTATE;
				_moveCurr.copy( getMouseOnCircle( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY ) );
				_movePrev.copy( _moveCurr );
				break;

}

_this.dispatchEvent( endEvent );

}

function contextmenu( event ) {

if ( _this.enabled === false ) return;

event.preventDefault();

}

this.dispose = function () {

this.domElement.removeEventListener( 'contextmenu', contextmenu, false );
		this.domElement.removeEventListener( 'mousedown', mousedown, false );
		this.domElement.removeEventListener( 'wheel', mousewheel, false );

this.domElement.removeEventListener( 'touchstart', touchstart, false );
		this.domElement.removeEventListener( 'touchend', touchend, false );
		this.domElement.removeEventListener( 'touchmove', touchmove, false );

document.removeEventListener( 'mousemove', mousemove, false );
		document.removeEventListener( 'mouseup', mouseup, false );

window.removeEventListener( 'keydown', keydown, false );
		window.removeEventListener( 'keyup', keyup, false );

};

this.domElement.addEventListener( 'contextmenu', contextmenu, false );
	this.domElement.addEventListener( 'mousedown', mousedown, false );
	this.domElement.addEventListener( 'wheel', mousewheel, false );

this.domElement.addEventListener( 'touchstart', touchstart, false );
	this.domElement.addEventListener( 'touchend', touchend, false );
	this.domElement.addEventListener( 'touchmove', touchmove, false );

window.addEventListener( 'keydown', keydown, false );
	window.addEventListener( 'keyup', keyup, false );

this.handleResize();

// force an update at start
	this.update();

};

THREE.TrackballControls.prototype = Object.create( THREE.EventDispatcher.prototype );
THREE.TrackballControls.prototype.constructor = THREE.TrackballControls;

Texto modificado

Abrir archivo

THREE.TrackballControls = function ( object, domElement ) {

var _this = this;
	var STATE = { NONE: - 1, ROTATE: 0, ZOOM: 1, PAN: 2, TOUCH_ROTATE: 3, TOUCH_ZOOM_PAN: 4 };

this.object = object;
	this.domElement = ( domElement !== undefined ) ? domElement : document;

// API

this.enabled = true;

this.screen = { left: 0, top: 0, width: 0, height: 0 };

this.rotateSpeed = 0.66;
	this.zoomSpeed = 1.2;
	this.panSpeed = 0.2;

this.noRotate = false;
	this.noZoom = true;
	this.noPan = false;

this.staticMoving = false;
	this.dynamicDampingFactor = 0.2;

this.minDistance = 0;
	this.maxDistance = Infinity;

this.keys = [ 65 /*A*/, 83 /*S*/, 68 /*D*/ ];

// internals

this.target = new THREE.Vector3();

var EPS = 0.000001;

var lastPosition = new THREE.Vector3();

var _state = STATE.ROTATE,
		_prevState = STATE.NONE,

_eye = new THREE.Vector3(),

_movePrev = new THREE.Vector2(),
		_moveCurr = new THREE.Vector2(),

_lastAxis = new THREE.Vector3(),
		_lastAngle = 0,

_zoomStart = new THREE.Vector2(),
		_zoomEnd = new THREE.Vector2(),

_touchZoomDistanceStart = 0,
		_touchZoomDistanceEnd = 0,

_panStart = new THREE.Vector2(),
		_panEnd = new THREE.Vector2();

// for reset

this.target0 = this.target.clone();
	this.position0 = this.object.position.clone();
	this.up0 = this.object.up.clone();

// events

var changeEvent = { type: 'change' };
	var startEvent = { type: 'start' };
	var endEvent = { type: 'end' };

// methods

this.handleResize = function () {

if ( this.domElement === document ) {

this.screen.left = 0;
			this.screen.top = 0;
			this.screen.width = window.innerWidth;
			this.screen.height = window.innerHeight;

} else {

}

};

this.handleEvent = function ( event ) {

if ( typeof this[ event.type ] == 'function' ) {

this[ event.type ]( event );

}

};

var getMouseOnScreen = ( function () {

var vector = new THREE.Vector2();

return function getMouseOnScreen( pageX, pageY ) {

vector.set(
				( pageX - _this.screen.left ) / _this.screen.width,
				( pageY - _this.screen.top ) / _this.screen.height
			);

return vector;

};

}() );

var getMouseOnCircle = ( function () {

var vector = new THREE.Vector2();

return function getMouseOnCircle( pageX, pageY ) {

return vector;

};

}() );

this.rotateCamera = ( function () {

return function rotateCamera() {

moveDirection.set( _moveCurr.x - _movePrev.x, _moveCurr.y - _movePrev.y, 0 );
			angle = moveDirection.length();

if ( angle ) {

_eye.copy( _this.object.position ).sub( _this.target );

eyeDirection.copy( _eye ).normalize();
				objectUpDirection.copy( _this.object.up ).normalize();
				objectSidewaysDirection.crossVectors( objectUpDirection, eyeDirection ).normalize();

objectUpDirection.setLength( _moveCurr.y - _movePrev.y );
				objectSidewaysDirection.setLength( _moveCurr.x - _movePrev.x );

moveDirection.copy( objectUpDirection.add( objectSidewaysDirection ) );

axis.crossVectors( moveDirection, _eye ).normalize();

angle *= _this.rotateSpeed;
				quaternion.setFromAxisAngle( axis, angle );

_eye.applyQuaternion( quaternion );
				_this.object.up.applyQuaternion( quaternion );

_lastAxis.copy( axis );
				_lastAngle = angle;

} else if ( ! _this.staticMoving && _lastAngle ) {

}

_movePrev.copy( _moveCurr );

};

}() );

this.zoomCamera = function () {

var factor;

if ( _state === STATE.TOUCH_ZOOM_PAN ) {

factor = _touchZoomDistanceStart / _touchZoomDistanceEnd;
			_touchZoomDistanceStart = _touchZoomDistanceEnd;
			_eye.multiplyScalar( factor );

} else {

factor = 1.0 + ( _zoomEnd.y - _zoomStart.y ) * _this.zoomSpeed;

if ( factor !== 1.0 && factor > 0.0 ) {

_eye.multiplyScalar( factor );

}

if ( _this.staticMoving ) {

_zoomStart.copy( _zoomEnd );

} else {

_zoomStart.y += ( _zoomEnd.y - _zoomStart.y ) * this.dynamicDampingFactor;

}

};

this.panCamera = ( function () {

var mouseChange = new THREE.Vector2(),
			objectUp = new THREE.Vector3(),
			pan = new THREE.Vector3();

return function panCamera() {

mouseChange.copy( _panEnd ).sub( _panStart );

if ( mouseChange.lengthSq() ) {

mouseChange.multiplyScalar( _eye.length() * _this.panSpeed );

pan.copy( _eye ).cross( _this.object.up ).setLength( mouseChange.x );
				pan.add( objectUp.copy( _this.object.up ).setLength( mouseChange.y ) );

_this.object.position.add( pan );
				_this.target.add( pan );

if ( _this.staticMoving ) {

_panStart.copy( _panEnd );

} else {

_panStart.add( mouseChange.subVectors( _panEnd, _panStart ).multiplyScalar( _this.dynamicDampingFactor ) );

}

};

}() );

this.checkDistances = function () {

if ( ! _this.noZoom || ! _this.noPan ) {

if ( _eye.lengthSq() > _this.maxDistance * _this.maxDistance ) {

_this.object.position.addVectors( _this.target, _eye.setLength( _this.maxDistance ) );
				_zoomStart.copy( _zoomEnd );

}

if ( _eye.lengthSq() < _this.minDistance * _this.minDistance ) {

_this.object.position.addVectors( _this.target, _eye.setLength( _this.minDistance ) );
				_zoomStart.copy( _zoomEnd );

}

};

this.update = function () {

_eye.subVectors( _this.object.position, _this.target );

if ( ! _this.noRotate ) {

_this.rotateCamera();

}

if ( ! _this.noZoom ) {

_this.zoomCamera();

}

if ( ! _this.noPan ) {

_this.panCamera();

}

_this.object.position.addVectors( _this.target, _eye );

_this.checkDistances();

_this.object.lookAt( _this.target );

if ( lastPosition.distanceToSquared( _this.object.position ) > EPS ) {

_this.dispatchEvent( changeEvent );

lastPosition.copy( _this.object.position );

}

};

this.reset = function () {

_state = STATE.NONE;
		_prevState = STATE.NONE;

_this.target.copy( _this.target0 );
		_this.object.position.copy( _this.position0 );
		_this.object.up.copy( _this.up0 );

_eye.subVectors( _this.object.position, _this.target );

_this.object.lookAt( _this.target );

_this.dispatchEvent( changeEvent );

lastPosition.copy( _this.object.position );

};

// listeners

function keydown( event ) {

if ( _this.enabled === false ) return;

window.removeEventListener( 'keydown', keydown );

_prevState = _state;

if ( _state !== STATE.NONE ) {

return;

} else if ( event.keyCode === _this.keys[ STATE.ROTATE ] && ! _this.noRotate ) {

_state = STATE.ROTATE;

} else if ( event.keyCode === _this.keys[ STATE.ZOOM ] && ! _this.noZoom ) {

_state = STATE.ZOOM;

} else if ( event.keyCode === _this.keys[ STATE.PAN ] && ! _this.noPan ) {

_state = STATE.PAN;

}

function keyup( event ) {

if ( _this.enabled === false ) return;

_state = _prevState;

window.addEventListener( 'keydown', keydown, false );

}

function mousedown( event ) {

if ( _this.enabled === false ) return;

event.preventDefault();
		event.stopPropagation();

if ( _state === STATE.NONE ) {

_state = event.button;

}

if ( _state === STATE.ROTATE && ! _this.noRotate ) {

_moveCurr.copy( getMouseOnCircle( event.pageX, event.pageY ) );
			_movePrev.copy( _moveCurr );

} else if ( _state === STATE.ZOOM && ! _this.noZoom ) {

_zoomStart.copy( getMouseOnScreen( event.pageX, event.pageY ) );
			_zoomEnd.copy( _zoomStart );

} else if ( _state === STATE.PAN && ! _this.noPan ) {

_panStart.copy( getMouseOnScreen( event.pageX, event.pageY ) );
			_panEnd.copy( _panStart );

}

//document.addEventListener( 'mousemove', mousemove, false );
		//document.addEventListener( 'mouseup', mouseup, false );

_this.dispatchEvent( startEvent );

}

function mousemove( event ) {

if ( _this.enabled === false ) return;

event.preventDefault();
		event.stopPropagation();

if ( _state === STATE.ROTATE && ! _this.noRotate ) {

_movePrev.copy( _moveCurr );
			_moveCurr.copy( getMouseOnCircle( event.pageX, event.pageY ) );

} else if ( _state === STATE.ZOOM && ! _this.noZoom ) {

_zoomEnd.copy( getMouseOnScreen( event.pageX, event.pageY ) );

} else if ( _state === STATE.PAN && ! _this.noPan ) {

_panEnd.copy( getMouseOnScreen( event.pageX, event.pageY ) );

}

function mouseup( event ) {

if ( _this.enabled === false ) return;

event.preventDefault();
		event.stopPropagation();

//_state = STATE.NONE;

//document.removeEventListener( 'mousemove', mousemove );
		//document.removeEventListener( 'mouseup', mouseup );
		_this.dispatchEvent( endEvent );

}

function mousewheel( event ) {

if ( _this.enabled === false ) return;

if ( _this.noZoom === true ) return;

event.preventDefault();
		event.stopPropagation();

switch ( event.deltaMode ) {

case 2:
				// Zoom in pages
				_zoomStart.y -= event.deltaY * 0.025;
				break;

case 1:
				// Zoom in lines
				_zoomStart.y -= event.deltaY * 0.01;
				break;

default:
				// undefined, 0, assume pixels
				_zoomStart.y -= event.deltaY * 0.00025;
				break;

}

_this.dispatchEvent( startEvent );
		_this.dispatchEvent( endEvent );

}

function touchstart( event ) {

if ( _this.enabled === false ) return;

switch ( event.touches.length ) {

case 1:
				_state = STATE.TOUCH_ROTATE;
				_moveCurr.copy( getMouseOnCircle( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY ) );
				_movePrev.copy( _moveCurr );
				break;

}

_this.dispatchEvent( startEvent );

}

function touchmove( event ) {

if ( _this.enabled === false ) return;

event.preventDefault();
		event.stopPropagation();

switch ( event.touches.length ) {

case 1:
				_movePrev.copy( _moveCurr );
				_moveCurr.copy( getMouseOnCircle( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY ) );
				break;

var x = ( event.touches[ 0 ].pageX + event.touches[ 1 ].pageX ) / 2;
				var y = ( event.touches[ 0 ].pageY + event.touches[ 1 ].pageY ) / 2;
				_panEnd.copy( getMouseOnScreen( x, y ) );
				break;

}

function touchend( event ) {

if ( _this.enabled === false ) return;

switch ( event.touches.length ) {

case 0:
				_state = STATE.NONE;
				break;

case 1:
				_state = STATE.TOUCH_ROTATE;
				_moveCurr.copy( getMouseOnCircle( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY ) );
				_movePrev.copy( _moveCurr );
				break;

}

_this.dispatchEvent( endEvent );

}

function contextmenu( event ) {

if ( _this.enabled === false ) return;

event.preventDefault();

}

this.dispose = function () {

document.removeEventListener( 'mousemove', mousemove, false );
		document.removeEventListener( 'mouseup', mouseup, false );

window.removeEventListener( 'keydown', keydown, false );
		window.removeEventListener( 'keyup', keyup, false );

};

window.addEventListener( 'keydown', keydown, false );
	window.addEventListener( 'keyup', keyup, false );

this.handleResize();

// force an update at start
	this.update();

document.addEventListener( 'mousemove', mousemove, false );
	document.addEventListener( 'mouseup', mouseup, false );

};

THREE.TrackballControls.prototype = Object.create( THREE.EventDispatcher.prototype );
THREE.TrackballControls.prototype.constructor = THREE.TrackballControls;

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