Upload New File

lib/TrackballControls.js

+/**
+ * @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;