Merge pull request #18483 from WestLangley/dev_camera_controls

CameraControls: consolidate OrbitControls, MapControls, and TrackballControls

examples/js/controls/CameraControls.js

@@ -0,0 +1,1245 @@
+/**
+ * @author qiao / https://github.com/qiao
+ * @author mrdoob / http://mrdoob.com
+ * @author alteredq / http://alteredqualia.com/
+ * @author WestLangley / http://github.com/WestLangley
+ * @author erich666 / http://erichaines.com
+ * @author ScieCode / http://github.com/sciecode
+ */
+
+THREE.CameraControls = function ( object, domElement ) {
+
+	if ( domElement === undefined ) console.warn( 'THREE.CameraControls: The second parameter "domElement" is now mandatory.' );
+	if ( domElement === document ) console.error( 'THREE.CameraControls: "document" should not be used as the target "domElement". Please use "renderer.domElement" instead.' );
+
+	this.object = object;
+	this.domElement = domElement;
+
+	// Set to false to disable this control
+	this.enabled = true;
+
+	// "target" sets the location of focus, where the object orbits around
+	this.target = new THREE.Vector3();
+
+	// Set to true to enable trackball behavior
+	this.trackball = false;
+
+	// How far you can dolly in and out ( PerspectiveCamera only )
+	this.minDistance = 0;
+	this.maxDistance = Infinity;
+
+	// How far you can zoom in and out ( OrthographicCamera only )
+	this.minZoom = 0;
+	this.maxZoom = Infinity;
+
+	// How far you can orbit vertically, upper and lower limits.
+	// Range is 0 to Math.PI radians.
+	this.minPolarAngle = 0; // radians
+	this.maxPolarAngle = Math.PI; // radians
+
+	// How far you can orbit horizontally, upper and lower limits.
+	// If set, must be a sub-interval of the interval [ - Math.PI, Math.PI ].
+	this.minAzimuthAngle = - Infinity; // radians
+	this.maxAzimuthAngle = Infinity; // radians
+
+	// Set to true to enable damping (inertia)
+	// If damping is enabled, you must call controls.update() in your animation loop
+	this.enableDamping = false;
+	this.dampingFactor = 0.05;
+
+	// This option enables dollying in and out; property named as "zoom" for backwards compatibility
+	// Set to false to disable zooming
+	this.enableZoom = true;
+	this.zoomSpeed = 1.0;
+
+	// Set to false to disable rotating
+	this.enableRotate = true;
+	this.rotateSpeed = 1.0;
+
+	// Set to false to disable panning
+	this.enablePan = true;
+	this.panSpeed = 1.0;
+	this.screenSpacePanning = false; // if true, pan in screen-space
+	this.keyPanSpeed = 7.0;	// pixels moved per arrow key push
+
+	// Set to true to automatically rotate around the target
+	// If auto-rotate is enabled, you must call controls.update() in your animation loop
+	// auto-rotate is not supported for trackball behavior
+	this.autoRotate = false;
+	this.autoRotateSpeed = 2.0; // 30 seconds per round when fps is 60
+
+	// Set to false to disable use of the keys
+	this.enableKeys = true;
+
+	// The four arrow keys
+	this.keys = { LEFT: 37, UP: 38, RIGHT: 39, BOTTOM: 40 };
+
+	// Mouse buttons
+	this.mouseButtons = { LEFT: THREE.MOUSE.ROTATE, MIDDLE: THREE.MOUSE.DOLLY, RIGHT: THREE.MOUSE.PAN };
+
+	// Touch fingers
+	this.touches = { ONE: THREE.TOUCH.ROTATE, TWO: THREE.TOUCH.DOLLY_PAN };
+
+	// for reset
+	this.target0 = this.target.clone();
+	this.position0 = this.object.position.clone();
+	this.quaternion0 = this.object.quaternion.clone();
+	this.zoom0 = this.object.zoom;
+
+	//
+	// public methods
+	//
+
+	this.getPolarAngle = function () {
+
+		return spherical.phi;
+
+	};
+
+	this.getAzimuthalAngle = function () {
+
+		return spherical.theta;
+
+	};
+
+	this.saveState = function () {
+
+		scope.target0.copy( scope.target );
+		scope.position0.copy( scope.object.position );
+		scope.quaternion0.copy( scope.object.quaternion );
+		scope.zoom0 = scope.object.zoom;
+
+	};
+
+	this.reset = function () {
+
+		scope.target.copy( scope.target0 );
+		scope.object.position.copy( scope.position0 );
+		scope.object.quaternion.copy( scope.quaternion0 );
+		scope.object.zoom = scope.zoom0;
+
+		scope.object.updateProjectionMatrix();
+		scope.dispatchEvent( changeEvent );
+
+		scope.update();
+
+		state = STATE.NONE;
+
+	};
+
+	// this method is exposed, but perhaps it would be better if we can make it private...
+	this.update = function () {
+
+		var offset = new THREE.Vector3();
+
+		// so camera.up is the orbit axis
+		var quat = new THREE.Quaternion().setFromUnitVectors( object.up, new THREE.Vector3( 0, 1, 0 ) );
+		var quatInverse = quat.clone().inverse();
+
+		var lastPosition = new THREE.Vector3();
+		var lastQuaternion = new THREE.Quaternion();
+
+		var q = new THREE.Quaternion();
+		var vec = new THREE.Vector3();
+
+		return function update() {
+
+			var position = scope.object.position;
+
+			offset.copy( position ).sub( scope.target );
+
+			if ( scope.trackball ) {
+
+				// rotate around screen-space y-axis
+
+				if ( sphericalDelta.theta ) {
+
+					vec.set( 0, 1, 0 ).applyQuaternion( scope.object.quaternion );
+
+					var factor = ( scope.enableDamping ) ? scope.dampingFactor : 1;
+
+					q.setFromAxisAngle( vec, sphericalDelta.theta * factor );
+
+					scope.object.quaternion.premultiply( q );
+					offset.applyQuaternion( q );
+
+				}
+
+				// rotate around screen-space x-axis
+
+				if ( sphericalDelta.phi ) {
+
+					vec.set( 1, 0, 0 ).applyQuaternion( scope.object.quaternion );
+
+					var factor = ( scope.enableDamping ) ? scope.dampingFactor : 1;
+
+					q.setFromAxisAngle( vec, sphericalDelta.phi * factor );
+
+					scope.object.quaternion.premultiply( q );
+					offset.applyQuaternion( q );
+
+				}
+
+				offset.multiplyScalar( scale );
+				offset.clampLength( scope.minDistance, scope.maxDistance );
+
+			} else {
+
+				// rotate offset to "y-axis-is-up" space
+				offset.applyQuaternion( quat );
+
+				if ( scope.autoRotate && state === STATE.NONE ) {
+
+					rotateLeft( getAutoRotationAngle() );
+
+				}
+
+				spherical.setFromVector3( offset );
+
+				if ( scope.enableDamping ) {
+
+					spherical.theta += sphericalDelta.theta * scope.dampingFactor;
+					spherical.phi += sphericalDelta.phi * scope.dampingFactor;
+
+				} else {
+
+					spherical.theta += sphericalDelta.theta;
+					spherical.phi += sphericalDelta.phi;
+
+				}
+
+				// restrict theta to be between desired limits
+				spherical.theta = Math.max( scope.minAzimuthAngle, Math.min( scope.maxAzimuthAngle, spherical.theta ) );
+
+				// restrict phi to be between desired limits
+				spherical.phi = Math.max( scope.minPolarAngle, Math.min( scope.maxPolarAngle, spherical.phi ) );
+
+				spherical.makeSafe();
+
+				spherical.radius *= scale;
+
+				// restrict radius to be between desired limits
+				spherical.radius = Math.max( scope.minDistance, Math.min( scope.maxDistance, spherical.radius ) );
+
+				offset.setFromSpherical( spherical );
+
+				// rotate offset back to "camera-up-vector-is-up" space
+				offset.applyQuaternion( quatInverse );
+
+			}
+
+			// move target to panned location
+
+			if ( scope.enableDamping === true ) {
+
+				scope.target.addScaledVector( panOffset, scope.dampingFactor );
+
+			} else {
+
+				scope.target.add( panOffset );
+
+			}
+
+			position.copy( scope.target ).add( offset );
+
+			if ( scope.trackball === false ) {
+
+				scope.object.lookAt( scope.target );
+
+			}
+
+			if ( scope.enableDamping === true ) {
+
+				sphericalDelta.theta *= ( 1 - scope.dampingFactor );
+				sphericalDelta.phi *= ( 1 - scope.dampingFactor );
+
+				panOffset.multiplyScalar( 1 - scope.dampingFactor );
+
+			} else {
+
+				sphericalDelta.set( 0, 0, 0 );
+
+				panOffset.set( 0, 0, 0 );
+
+			}
+
+			scale = 1;
+
+			// update condition is:
+			// min(camera displacement, camera rotation in radians)^2 > EPS
+			// using small-angle approximation cos(x/2) = 1 - x^2 / 8
+
+			if ( zoomChanged ||
+				lastPosition.distanceToSquared( scope.object.position ) > EPS ||
+				8 * ( 1 - lastQuaternion.dot( scope.object.quaternion ) ) > EPS ) {
+
+				scope.dispatchEvent( changeEvent );
+
+				lastPosition.copy( scope.object.position );
+				lastQuaternion.copy( scope.object.quaternion );
+				zoomChanged = false;
+
+				return true;
+
+			}
+
+			return false;
+
+		};
+
+	}();
+
+	this.dispose = function () {
+
+		scope.domElement.removeEventListener( 'contextmenu', onContextMenu, false );
+		scope.domElement.removeEventListener( 'mousedown', onMouseDown, false );
+		scope.domElement.removeEventListener( 'wheel', onMouseWheel, false );
+
+		scope.domElement.removeEventListener( 'touchstart', onTouchStart, false );
+		scope.domElement.removeEventListener( 'touchend', onTouchEnd, false );
+		scope.domElement.removeEventListener( 'touchmove', onTouchMove, false );
+
+		document.removeEventListener( 'mousemove', onMouseMove, false );
+		document.removeEventListener( 'mouseup', onMouseUp, false );
+
+		scope.domElement.removeEventListener( 'keydown', onKeyDown, false );
+
+		//scope.dispatchEvent( { type: 'dispose' } ); // should this be added here?
+
+	};
+
+	//
+	// internals
+	//
+
+	var scope = this;
+
+	var changeEvent = { type: 'change' };
+	var startEvent = { type: 'start' };
+	var endEvent = { type: 'end' };
+
+	var STATE = {
+		NONE: - 1,
+		ROTATE: 0,
+		DOLLY: 1,
+		PAN: 2,
+		TOUCH_ROTATE: 3,
+		TOUCH_PAN: 4,
+		TOUCH_DOLLY_PAN: 5,
+		TOUCH_DOLLY_ROTATE: 6
+	};
+
+	var state = STATE.NONE;
+
+	var EPS = 0.000001;
+
+	// current position in spherical coordinates
+	var spherical = new THREE.Spherical();
+	var sphericalDelta = new THREE.Spherical();
+
+	var scale = 1;
+	var panOffset = new THREE.Vector3();
+	var zoomChanged = false;
+
+	var rotateStart = new THREE.Vector2();
+	var rotateEnd = new THREE.Vector2();
+	var rotateDelta = new THREE.Vector2();
+
+	var panStart = new THREE.Vector2();
+	var panEnd = new THREE.Vector2();
+	var panDelta = new THREE.Vector2();
+
+	var dollyStart = new THREE.Vector2();
+	var dollyEnd = new THREE.Vector2();
+	var dollyDelta = new THREE.Vector2();
+
+	function getAutoRotationAngle() {
+
+		return 2 * Math.PI / 60 / 60 * scope.autoRotateSpeed;
+
+	}
+
+	function getZoomScale() {
+
+		return Math.pow( 0.95, scope.zoomSpeed );
+
+	}
+
+	function rotateLeft( angle ) {
+
+		sphericalDelta.theta -= angle;
+
+	}
+
+	function rotateUp( angle ) {
+
+		sphericalDelta.phi -= angle;
+
+	}
+
+	var panLeft = function () {
+
+		var v = new THREE.Vector3();
+
+		return function panLeft( distance, objectMatrix ) {
+
+			v.setFromMatrixColumn( objectMatrix, 0 ); // get X column of objectMatrix
+			v.multiplyScalar( - distance );
+
+			panOffset.add( v );
+
+		};
+
+	}();
+
+	var panUp = function () {
+
+		var v = new THREE.Vector3();
+
+		return function panUp( distance, objectMatrix ) {
+
+			if ( scope.screenSpacePanning === true ) {
+
+				v.setFromMatrixColumn( objectMatrix, 1 );
+
+			} else {
+
+				v.setFromMatrixColumn( objectMatrix, 0 );
+				v.crossVectors( scope.object.up, v );
+
+			}
+
+			v.multiplyScalar( distance );
+
+			panOffset.add( v );
+
+		};
+
+	}();
+
+	// deltaX and deltaY are in pixels; right and down are positive
+	var pan = function () {
+
+		var offset = new THREE.Vector3();
+
+		return function pan( deltaX, deltaY ) {
+
+			var element = scope.domElement;
+
+			if ( scope.object.isPerspectiveCamera ) {
+
+				// perspective
+				var position = scope.object.position;
+				offset.copy( position ).sub( scope.target );
+				var targetDistance = offset.length();
+
+				// half of the fov is center to top of screen
+				targetDistance *= Math.tan( ( scope.object.fov / 2 ) * Math.PI / 180.0 );
+
+				// we use only clientHeight here so aspect ratio does not distort speed
+				panLeft( 2 * deltaX * targetDistance / element.clientHeight, scope.object.matrix );
+				panUp( 2 * deltaY * targetDistance / element.clientHeight, scope.object.matrix );
+
+			} else if ( scope.object.isOrthographicCamera ) {
+
+				// orthographic
+				panLeft( deltaX * ( scope.object.right - scope.object.left ) / scope.object.zoom / element.clientWidth, scope.object.matrix );
+				panUp( deltaY * ( scope.object.top - scope.object.bottom ) / scope.object.zoom / element.clientHeight, scope.object.matrix );
+
+			} else {
+
+				// camera neither orthographic nor perspective
+				console.warn( 'WARNING: CameraControls.js encountered an unknown camera type - pan disabled.' );
+				scope.enablePan = false;
+
+			}
+
+		};
+
+	}();
+
+	function dollyIn( dollyScale ) {
+
+		if ( scope.object.isPerspectiveCamera ) {
+
+			scale /= dollyScale;
+
+		} else if ( scope.object.isOrthographicCamera ) {
+
+			scope.object.zoom = Math.max( scope.minZoom, Math.min( scope.maxZoom, scope.object.zoom * dollyScale ) );
+			scope.object.updateProjectionMatrix();
+			zoomChanged = true;
+
+		} else {
+
+			console.warn( 'WARNING: CameraControls.js encountered an unknown camera type - dolly/zoom disabled.' );
+			scope.enableZoom = false;
+
+		}
+
+	}
+
+	function dollyOut( dollyScale ) {
+
+		if ( scope.object.isPerspectiveCamera ) {
+
+			scale *= dollyScale;
+
+		} else if ( scope.object.isOrthographicCamera ) {
+
+			scope.object.zoom = Math.max( scope.minZoom, Math.min( scope.maxZoom, scope.object.zoom / dollyScale ) );
+			scope.object.updateProjectionMatrix();
+			zoomChanged = true;
+
+		} else {
+
+			console.warn( 'WARNING: CameraControls.js encountered an unknown camera type - dolly/zoom disabled.' );
+			scope.enableZoom = false;
+
+		}
+
+	}
+
+	//
+	// event callbacks - update the object state
+	//
+
+	function handleMouseDownRotate( event ) {
+
+		rotateStart.set( event.clientX, event.clientY );
+
+	}
+
+	function handleMouseDownDolly( event ) {
+
+		dollyStart.set( event.clientX, event.clientY );
+
+	}
+
+	function handleMouseDownPan( event ) {
+
+		panStart.set( event.clientX, event.clientY );
+
+	}
+
+	function handleMouseMoveRotate( event ) {
+
+		rotateEnd.set( event.clientX, event.clientY );
+
+		rotateDelta.subVectors( rotateEnd, rotateStart ).multiplyScalar( scope.rotateSpeed );
+
+		var element = scope.domElement;
+
+		rotateLeft( 2 * Math.PI * rotateDelta.x / element.clientHeight ); // yes, height
+
+		rotateUp( 2 * Math.PI * rotateDelta.y / element.clientHeight );
+
+		rotateStart.copy( rotateEnd );
+
+		scope.update();
+
+	}
+
+	function handleMouseMoveDolly( event ) {
+
+		dollyEnd.set( event.clientX, event.clientY );
+
+		dollyDelta.subVectors( dollyEnd, dollyStart );
+
+		if ( dollyDelta.y > 0 ) {
+
+			dollyIn( getZoomScale() );
+
+		} else if ( dollyDelta.y < 0 ) {
+
+			dollyOut( getZoomScale() );
+
+		}
+
+		dollyStart.copy( dollyEnd );
+
+		scope.update();
+
+	}
+
+	function handleMouseMovePan( event ) {
+
+		panEnd.set( event.clientX, event.clientY );
+
+		panDelta.subVectors( panEnd, panStart ).multiplyScalar( scope.panSpeed );
+
+		pan( panDelta.x, panDelta.y );
+
+		panStart.copy( panEnd );
+
+		scope.update();
+
+	}
+
+	function handleMouseUp( /*event*/ ) {
+
+		// no-op
+
+	}
+
+	function handleMouseWheel( event ) {
+
+		if ( event.deltaY < 0 ) {
+
+			dollyOut( getZoomScale() );
+
+		} else if ( event.deltaY > 0 ) {
+
+			dollyIn( getZoomScale() );
+
+		}
+
+		scope.update();
+
+	}
+
+	function handleKeyDown( event ) {
+
+		var needsUpdate = false;
+
+		switch ( event.keyCode ) {
+
+			case scope.keys.UP:
+				pan( 0, scope.keyPanSpeed );
+				needsUpdate = true;
+				break;
+
+			case scope.keys.BOTTOM:
+				pan( 0, - scope.keyPanSpeed );
+				needsUpdate = true;
+				break;
+
+			case scope.keys.LEFT:
+				pan( scope.keyPanSpeed, 0 );
+				needsUpdate = true;
+				break;
+
+			case scope.keys.RIGHT:
+				pan( - scope.keyPanSpeed, 0 );
+				needsUpdate = true;
+				break;
+
+		}
+
+		if ( needsUpdate ) {
+
+			// prevent the browser from scrolling on cursor keys
+			event.preventDefault();
+
+			scope.update();
+
+		}
+
+
+	}
+
+	function handleTouchStartRotate( event ) {
+
+		if ( event.touches.length == 1 ) {
+
+			rotateStart.set( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY );
+
+		} else {
+
+			var x = 0.5 * ( event.touches[ 0 ].pageX + event.touches[ 1 ].pageX );
+			var y = 0.5 * ( event.touches[ 0 ].pageY + event.touches[ 1 ].pageY );
+
+			rotateStart.set( x, y );
+
+		}
+
+	}
+
+	function handleTouchStartPan( event ) {
+
+		if ( event.touches.length == 1 ) {
+
+			panStart.set( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY );
+
+		} else {
+
+			var x = 0.5 * ( event.touches[ 0 ].pageX + event.touches[ 1 ].pageX );
+			var y = 0.5 * ( event.touches[ 0 ].pageY + event.touches[ 1 ].pageY );
+
+			panStart.set( x, y );
+
+		}
+
+	}
+
+	function handleTouchStartDolly( event ) {
+
+		var dx = event.touches[ 0 ].pageX - event.touches[ 1 ].pageX;
+		var dy = event.touches[ 0 ].pageY - event.touches[ 1 ].pageY;
+
+		var distance = Math.sqrt( dx * dx + dy * dy );
+
+		dollyStart.set( 0, distance );
+
+	}
+
+	function handleTouchStartDollyPan( event ) {
+
+		if ( scope.enableZoom ) handleTouchStartDolly( event );
+
+		if ( scope.enablePan ) handleTouchStartPan( event );
+
+	}
+
+	function handleTouchStartDollyRotate( event ) {
+
+		if ( scope.enableZoom ) handleTouchStartDolly( event );
+
+		if ( scope.enableRotate ) handleTouchStartRotate( event );
+
+	}
+
+	function handleTouchMoveRotate( event ) {
+
+		if ( event.touches.length == 1 ) {
+
+			rotateEnd.set( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY );
+
+		} else {
+
+			var x = 0.5 * ( event.touches[ 0 ].pageX + event.touches[ 1 ].pageX );
+			var y = 0.5 * ( event.touches[ 0 ].pageY + event.touches[ 1 ].pageY );
+
+			rotateEnd.set( x, y );
+
+		}
+
+		rotateDelta.subVectors( rotateEnd, rotateStart ).multiplyScalar( scope.rotateSpeed );
+
+		var element = scope.domElement;
+
+		rotateLeft( 2 * Math.PI * rotateDelta.x / element.clientHeight ); // yes, height
+
+		rotateUp( 2 * Math.PI * rotateDelta.y / element.clientHeight );
+
+		rotateStart.copy( rotateEnd );
+
+	}
+
+	function handleTouchMovePan( event ) {
+
+		if ( event.touches.length == 1 ) {
+
+			panEnd.set( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY );
+
+		} else {
+
+			var x = 0.5 * ( event.touches[ 0 ].pageX + event.touches[ 1 ].pageX );
+			var y = 0.5 * ( event.touches[ 0 ].pageY + event.touches[ 1 ].pageY );
+
+			panEnd.set( x, y );
+
+		}
+
+		panDelta.subVectors( panEnd, panStart ).multiplyScalar( scope.panSpeed );
+
+		pan( panDelta.x, panDelta.y );
+
+		panStart.copy( panEnd );
+
+	}
+
+	function handleTouchMoveDolly( event ) {
+
+		var dx = event.touches[ 0 ].pageX - event.touches[ 1 ].pageX;
+		var dy = event.touches[ 0 ].pageY - event.touches[ 1 ].pageY;
+
+		var distance = Math.sqrt( dx * dx + dy * dy );
+
+		dollyEnd.set( 0, distance );
+
+		dollyDelta.set( 0, Math.pow( dollyEnd.y / dollyStart.y, scope.zoomSpeed ) );
+
+		dollyIn( dollyDelta.y );
+
+		dollyStart.copy( dollyEnd );
+
+	}
+
+	function handleTouchMoveDollyPan( event ) {
+
+		if ( scope.enableZoom ) handleTouchMoveDolly( event );
+
+		if ( scope.enablePan ) handleTouchMovePan( event );
+
+	}
+
+	function handleTouchMoveDollyRotate( event ) {
+
+		if ( scope.enableZoom ) handleTouchMoveDolly( event );
+
+		if ( scope.enableRotate ) handleTouchMoveRotate( event );
+
+	}
+
+	function handleTouchEnd( /*event*/ ) {
+
+		// no-op
+
+	}
+
+	//
+	// event handlers - FSM: listen for events and reset state
+	//
+
+	function onMouseDown( event ) {
+
+		if ( scope.enabled === false ) return;
+
+		// Prevent the browser from scrolling.
+
+		event.preventDefault();
+
+		// Manually set the focus since calling preventDefault above
+		// prevents the browser from setting it automatically.
+
+		scope.domElement.focus ? scope.domElement.focus() : window.focus();
+
+		var mouseAction;
+
+		switch ( event.button ) {
+
+			case 0:
+
+				mouseAction = scope.mouseButtons.LEFT;
+				break;
+
+			case 1:
+
+				mouseAction = scope.mouseButtons.MIDDLE;
+				break;
+
+			case 2:
+
+				mouseAction = scope.mouseButtons.RIGHT;
+				break;
+
+			default:
+
+				mouseAction = - 1;
+
+		}
+
+		switch ( mouseAction ) {
+
+			case THREE.MOUSE.DOLLY:
+
+				if ( scope.enableZoom === false ) return;
+
+				handleMouseDownDolly( event );
+
+				state = STATE.DOLLY;
+
+				break;
+
+			case THREE.MOUSE.ROTATE:
+
+				if ( event.ctrlKey || event.metaKey || event.shiftKey ) {
+
+					if ( scope.enablePan === false ) return;
+
+					handleMouseDownPan( event );
+
+					state = STATE.PAN;
+
+				} else {
+
+					if ( scope.enableRotate === false ) return;
+
+					handleMouseDownRotate( event );
+
+					state = STATE.ROTATE;
+
+				}
+
+				break;
+
+			case THREE.MOUSE.PAN:
+
+				if ( event.ctrlKey || event.metaKey || event.shiftKey ) {
+
+					if ( scope.enableRotate === false ) return;
+
+					handleMouseDownRotate( event );
+
+					state = STATE.ROTATE;
+
+				} else {
+
+					if ( scope.enablePan === false ) return;
+
+					handleMouseDownPan( event );
+
+					state = STATE.PAN;
+
+				}
+
+				break;
+
+			default:
+
+				state = STATE.NONE;
+
+		}
+
+		if ( state !== STATE.NONE ) {
+
+			document.addEventListener( 'mousemove', onMouseMove, false );
+			document.addEventListener( 'mouseup', onMouseUp, false );
+
+			scope.dispatchEvent( startEvent );
+
+		}
+
+	}
+
+	function onMouseMove( event ) {
+
+		if ( scope.enabled === false ) return;
+
+		event.preventDefault();
+
+		switch ( state ) {
+
+			case STATE.ROTATE:
+
+				if ( scope.enableRotate === false ) return;
+
+				handleMouseMoveRotate( event );
+
+				break;
+
+			case STATE.DOLLY:
+
+				if ( scope.enableZoom === false ) return;
+
+				handleMouseMoveDolly( event );
+
+				break;
+
+			case STATE.PAN:
+
+				if ( scope.enablePan === false ) return;
+
+				handleMouseMovePan( event );
+
+				break;
+
+		}
+
+	}
+
+	function onMouseUp( event ) {
+
+		if ( scope.enabled === false ) return;
+
+		handleMouseUp( event );
+
+		document.removeEventListener( 'mousemove', onMouseMove, false );
+		document.removeEventListener( 'mouseup', onMouseUp, false );
+
+		scope.dispatchEvent( endEvent );
+
+		state = STATE.NONE;
+
+	}
+
+	function onMouseWheel( event ) {
+
+		if ( scope.enabled === false || scope.enableZoom === false || ( state !== STATE.NONE && state !== STATE.ROTATE ) ) return;
+
+		event.preventDefault();
+		event.stopPropagation();
+
+		scope.dispatchEvent( startEvent );
+
+		handleMouseWheel( event );
+
+		scope.dispatchEvent( endEvent );
+
+	}
+
+	function onKeyDown( event ) {
+
+		if ( scope.enabled === false || scope.enableKeys === false || scope.enablePan === false ) return;
+
+		handleKeyDown( event );
+
+	}
+
+	function onTouchStart( event ) {
+
+		if ( scope.enabled === false ) return;
+
+		event.preventDefault();
+
+		switch ( event.touches.length ) {
+
+			case 1:
+
+				switch ( scope.touches.ONE ) {
+
+					case THREE.TOUCH.ROTATE:
+
+						if ( scope.enableRotate === false ) return;
+
+						handleTouchStartRotate( event );
+
+						state = STATE.TOUCH_ROTATE;
+
+						break;
+
+					case THREE.TOUCH.PAN:
+
+						if ( scope.enablePan === false ) return;
+
+						handleTouchStartPan( event );
+
+						state = STATE.TOUCH_PAN;
+
+						break;
+
+					default:
+
+						state = STATE.NONE;
+
+				}
+
+				break;
+
+			case 2:
+
+				switch ( scope.touches.TWO ) {
+
+					case THREE.TOUCH.DOLLY_PAN:
+
+						if ( scope.enableZoom === false && scope.enablePan === false ) return;
+
+						handleTouchStartDollyPan( event );
+
+						state = STATE.TOUCH_DOLLY_PAN;
+
+						break;
+
+					case THREE.TOUCH.DOLLY_ROTATE:
+
+						if ( scope.enableZoom === false && scope.enableRotate === false ) return;
+
+						handleTouchStartDollyRotate( event );
+
+						state = STATE.TOUCH_DOLLY_ROTATE;
+
+						break;
+
+					default:
+
+						state = STATE.NONE;
+
+				}
+
+				break;
+
+			default:
+
+				state = STATE.NONE;
+
+		}
+
+		if ( state !== STATE.NONE ) {
+
+			scope.dispatchEvent( startEvent );
+
+		}
+
+	}
+
+	function onTouchMove( event ) {
+
+		if ( scope.enabled === false ) return;
+
+		event.preventDefault();
+		event.stopPropagation();
+
+		switch ( state ) {
+
+			case STATE.TOUCH_ROTATE:
+
+				if ( scope.enableRotate === false ) return;
+
+				handleTouchMoveRotate( event );
+
+				scope.update();
+
+				break;
+
+			case STATE.TOUCH_PAN:
+
+				if ( scope.enablePan === false ) return;
+
+				handleTouchMovePan( event );
+
+				scope.update();
+
+				break;
+
+			case STATE.TOUCH_DOLLY_PAN:
+
+				if ( scope.enableZoom === false && scope.enablePan === false ) return;
+
+				handleTouchMoveDollyPan( event );
+
+				scope.update();
+
+				break;
+
+			case STATE.TOUCH_DOLLY_ROTATE:
+
+				if ( scope.enableZoom === false && scope.enableRotate === false ) return;
+
+				handleTouchMoveDollyRotate( event );
+
+				scope.update();
+
+				break;
+
+			default:
+
+				state = STATE.NONE;
+
+		}
+
+	}
+
+	function onTouchEnd( event ) {
+
+		if ( scope.enabled === false ) return;
+
+		handleTouchEnd( event );
+
+		scope.dispatchEvent( endEvent );
+
+		state = STATE.NONE;
+
+	}
+
+	function onContextMenu( event ) {
+
+		if ( scope.enabled === false ) return;
+
+		event.preventDefault();
+
+	}
+
+	//
+
+	scope.domElement.addEventListener( 'contextmenu', onContextMenu, false );
+
+	scope.domElement.addEventListener( 'mousedown', onMouseDown, false );
+	scope.domElement.addEventListener( 'wheel', onMouseWheel, false );
+
+	scope.domElement.addEventListener( 'touchstart', onTouchStart, false );
+	scope.domElement.addEventListener( 'touchend', onTouchEnd, false );
+	scope.domElement.addEventListener( 'touchmove', onTouchMove, false );
+
+	scope.domElement.addEventListener( 'keydown', onKeyDown, false );
+
+	// make sure element can receive keys.
+
+	if ( scope.domElement.tabIndex === - 1 ) {
+
+		scope.domElement.tabIndex = 0;
+
+	}
+
+	// force an update at start
+
+	this.object.lookAt( scope.target );
+	this.update();
+	this.saveState();
+
+};
+
+THREE.CameraControls.prototype = Object.create( THREE.EventDispatcher.prototype );
+THREE.CameraControls.prototype.constructor = THREE.CameraControls;
+
+
+// OrbitControls maintains the "up" direction, camera.up (+Y by default).
+//
+//    Orbit - left mouse / touch: one-finger move
+//    Zoom - middle mouse, or mousewheel / touch: two-finger spread or squish
+//    Pan - right mouse, or left mouse + ctrl/meta/shiftKey, or arrow keys / touch: two-finger move
+
+THREE.OrbitControls = function ( object, domElement ) {
+
+	THREE.CameraControls.call( this, object, domElement );
+
+	this.mouseButtons.LEFT = THREE.MOUSE.ROTATE;
+	this.mouseButtons.RIGHT = THREE.MOUSE.PAN;
+
+	this.touches.ONE = THREE.TOUCH.ROTATE;
+	this.touches.TWO = THREE.TOUCH.DOLLY_PAN;
+
+};
+
+THREE.OrbitControls.prototype = Object.create( THREE.EventDispatcher.prototype );
+THREE.OrbitControls.prototype.constructor = THREE.OrbitControls;
+
+
+// MapControls maintains the "up" direction, camera.up (+Y by default)
+//
+//    Orbit - right mouse, or left mouse + ctrl/meta/shiftKey / touch: two-finger rotate
+//    Zoom - middle mouse, or mousewheel / touch: two-finger spread or squish
+//    Pan - left mouse, or left right + ctrl/meta/shiftKey, or arrow keys / touch: one-finger move
+
+
+THREE.MapControls = function ( object, domElement ) {
+
+	THREE.CameraControls.call( this, object, domElement );
+
+	this.mouseButtons.LEFT = THREE.MOUSE.PAN;
+	this.mouseButtons.RIGHT = THREE.MOUSE.ROTATE;
+
+	this.touches.ONE = THREE.TOUCH.PAN;
+	this.touches.TWO = THREE.TOUCH.DOLLY_ROTATE;
+
+};
+
+THREE.MapControls.prototype = Object.create( THREE.EventDispatcher.prototype );
+THREE.MapControls.prototype.constructor = THREE.MapControls;
+
+
+// TrackballControls allows the camera to rotate over the polls and does not maintain camera.up
+//
+//    Orbit - left mouse / touch: one-finger move
+//    Zoom - middle mouse, or mousewheel / touch: two-finger spread or squish
+//    Pan - right mouse, or left mouse + ctrl/meta/shiftKey, or arrow keys / touch: two-finger move
+
+THREE.TrackballControls = function ( object, domElement ) {
+
+	THREE.CameraControls.call( this, object, domElement );
+
+	this.trackball = true;
+	this.screenSpacePanning = true;
+	this.autoRotate = false;
+
+	this.mouseButtons.LEFT = THREE.MOUSE.ROTATE;
+	this.mouseButtons.RIGHT = THREE.MOUSE.PAN;
+
+	this.touches.ONE = THREE.TOUCH.ROTATE;
+	this.touches.TWO = THREE.TOUCH.DOLLY_PAN;
+
+};
+
+THREE.TrackballControls.prototype = Object.create( THREE.EventDispatcher.prototype );
+THREE.TrackballControls.prototype.constructor = THREE.TrackballControls;
+

examples/jsm/controls/CameraControls.js

@@ -0,0 +1,1257 @@
+/**
+ * @author qiao / https://github.com/qiao
+ * @author mrdoob / http://mrdoob.com
+ * @author alteredq / http://alteredqualia.com/
+ * @author WestLangley / http://github.com/WestLangley
+ * @author erich666 / http://erichaines.com
+ * @author ScieCode / http://github.com/sciecode
+ */
+
+import {
+	EventDispatcher,
+	MOUSE,
+	Quaternion,
+	Spherical,
+	TOUCH,
+	Vector2,
+	Vector3
+} from "../../../build/three.module.js";
+
+var CameraControls = function ( object, domElement ) {
+
+	if ( domElement === undefined ) console.warn( 'THREE.CameraControls: The second parameter "domElement" is now mandatory.' );
+	if ( domElement === document ) console.error( 'THREE.CameraControls: "document" should not be used as the target "domElement". Please use "renderer.domElement" instead.' );
+
+	this.object = object;
+	this.domElement = domElement;
+
+	// Set to false to disable this control
+	this.enabled = true;
+
+	// "target" sets the location of focus, where the object orbits around
+	this.target = new Vector3();
+
+	// Set to true to enable trackball behavior
+	this.trackball = false;
+
+	// How far you can dolly in and out ( PerspectiveCamera only )
+	this.minDistance = 0;
+	this.maxDistance = Infinity;
+
+	// How far you can zoom in and out ( OrthographicCamera only )
+	this.minZoom = 0;
+	this.maxZoom = Infinity;
+
+	// How far you can orbit vertically, upper and lower limits.
+	// Range is 0 to Math.PI radians.
+	this.minPolarAngle = 0; // radians
+	this.maxPolarAngle = Math.PI; // radians
+
+	// How far you can orbit horizontally, upper and lower limits.
+	// If set, must be a sub-interval of the interval [ - Math.PI, Math.PI ].
+	this.minAzimuthAngle = - Infinity; // radians
+	this.maxAzimuthAngle = Infinity; // radians
+
+	// Set to true to enable damping (inertia)
+	// If damping is enabled, you must call controls.update() in your animation loop
+	this.enableDamping = false;
+	this.dampingFactor = 0.05;
+
+	// This option enables dollying in and out; property named as "zoom" for backwards compatibility
+	// Set to false to disable zooming
+	this.enableZoom = true;
+	this.zoomSpeed = 1.0;
+
+	// Set to false to disable rotating
+	this.enableRotate = true;
+	this.rotateSpeed = 1.0;
+
+	// Set to false to disable panning
+	this.enablePan = true;
+	this.panSpeed = 1.0;
+	this.screenSpacePanning = false; // if true, pan in screen-space
+	this.keyPanSpeed = 7.0;	// pixels moved per arrow key push
+
+	// Set to true to automatically rotate around the target
+	// If auto-rotate is enabled, you must call controls.update() in your animation loop
+	// auto-rotate is not supported for trackball behavior
+	this.autoRotate = false;
+	this.autoRotateSpeed = 2.0; // 30 seconds per round when fps is 60
+
+	// Set to false to disable use of the keys
+	this.enableKeys = true;
+
+	// The four arrow keys
+	this.keys = { LEFT: 37, UP: 38, RIGHT: 39, BOTTOM: 40 };
+
+	// Mouse buttons
+	this.mouseButtons = { LEFT: MOUSE.ROTATE, MIDDLE: MOUSE.DOLLY, RIGHT: MOUSE.PAN };
+
+	// Touch fingers
+	this.touches = { ONE: TOUCH.ROTATE, TWO: TOUCH.DOLLY_PAN };
+
+	// for reset
+	this.target0 = this.target.clone();
+	this.position0 = this.object.position.clone();
+	this.quaternion0 = this.object.quaternion.clone();
+	this.zoom0 = this.object.zoom;
+
+	//
+	// public methods
+	//
+
+	this.getPolarAngle = function () {
+
+		return spherical.phi;
+
+	};
+
+	this.getAzimuthalAngle = function () {
+
+		return spherical.theta;
+
+	};
+
+	this.saveState = function () {
+
+		scope.target0.copy( scope.target );
+		scope.position0.copy( scope.object.position );
+		scope.quaternion0.copy( scope.object.quaternion );
+		scope.zoom0 = scope.object.zoom;
+
+	};
+
+	this.reset = function () {
+
+		scope.target.copy( scope.target0 );
+		scope.object.position.copy( scope.position0 );
+		scope.object.quaternion.copy( scope.quaternion0 );
+		scope.object.zoom = scope.zoom0;
+
+		scope.object.updateProjectionMatrix();
+		scope.dispatchEvent( changeEvent );
+
+		scope.update();
+
+		state = STATE.NONE;
+
+	};
+
+	// this method is exposed, but perhaps it would be better if we can make it private...
+	this.update = function () {
+
+		var offset = new Vector3();
+
+		// so camera.up is the orbit axis
+		var quat = new Quaternion().setFromUnitVectors( object.up, new Vector3( 0, 1, 0 ) );
+		var quatInverse = quat.clone().inverse();
+
+		var lastPosition = new Vector3();
+		var lastQuaternion = new Quaternion();
+
+		var q = new Quaternion();
+		var vec = new Vector3();
+
+		return function update() {
+
+			var position = scope.object.position;
+
+			offset.copy( position ).sub( scope.target );
+
+			if ( scope.trackball ) {
+
+				// rotate around screen-space y-axis
+
+				if ( sphericalDelta.theta ) {
+
+					vec.set( 0, 1, 0 ).applyQuaternion( scope.object.quaternion );
+
+					var factor = ( scope.enableDamping ) ? scope.dampingFactor : 1;
+
+					q.setFromAxisAngle( vec, sphericalDelta.theta * factor );
+
+					scope.object.quaternion.premultiply( q );
+					offset.applyQuaternion( q );
+
+				}
+
+				// rotate around screen-space x-axis
+
+				if ( sphericalDelta.phi ) {
+
+					vec.set( 1, 0, 0 ).applyQuaternion( scope.object.quaternion );
+
+					var factor = ( scope.enableDamping ) ? scope.dampingFactor : 1;
+
+					q.setFromAxisAngle( vec, sphericalDelta.phi * factor );
+
+					scope.object.quaternion.premultiply( q );
+					offset.applyQuaternion( q );
+
+				}
+
+				offset.multiplyScalar( scale );
+				offset.clampLength( scope.minDistance, scope.maxDistance );
+
+			} else {
+
+				// rotate offset to "y-axis-is-up" space
+				offset.applyQuaternion( quat );
+
+				if ( scope.autoRotate && state === STATE.NONE ) {
+
+					rotateLeft( getAutoRotationAngle() );
+
+				}
+
+				spherical.setFromVector3( offset );
+
+				if ( scope.enableDamping ) {
+
+					spherical.theta += sphericalDelta.theta * scope.dampingFactor;
+					spherical.phi += sphericalDelta.phi * scope.dampingFactor;
+
+				} else {
+
+					spherical.theta += sphericalDelta.theta;
+					spherical.phi += sphericalDelta.phi;
+
+				}
+
+				// restrict theta to be between desired limits
+				spherical.theta = Math.max( scope.minAzimuthAngle, Math.min( scope.maxAzimuthAngle, spherical.theta ) );
+
+				// restrict phi to be between desired limits
+				spherical.phi = Math.max( scope.minPolarAngle, Math.min( scope.maxPolarAngle, spherical.phi ) );
+
+				spherical.makeSafe();
+
+				spherical.radius *= scale;
+
+				// restrict radius to be between desired limits
+				spherical.radius = Math.max( scope.minDistance, Math.min( scope.maxDistance, spherical.radius ) );
+
+				offset.setFromSpherical( spherical );
+
+				// rotate offset back to "camera-up-vector-is-up" space
+				offset.applyQuaternion( quatInverse );
+
+			}
+
+			// move target to panned location
+
+			if ( scope.enableDamping === true ) {
+
+				scope.target.addScaledVector( panOffset, scope.dampingFactor );
+
+			} else {
+
+				scope.target.add( panOffset );
+
+			}
+
+			position.copy( scope.target ).add( offset );
+
+			if ( scope.trackball === false ) {
+
+				scope.object.lookAt( scope.target );
+
+			}
+
+			if ( scope.enableDamping === true ) {
+
+				sphericalDelta.theta *= ( 1 - scope.dampingFactor );
+				sphericalDelta.phi *= ( 1 - scope.dampingFactor );
+
+				panOffset.multiplyScalar( 1 - scope.dampingFactor );
+
+			} else {
+
+				sphericalDelta.set( 0, 0, 0 );
+
+				panOffset.set( 0, 0, 0 );
+
+			}
+
+			scale = 1;
+
+			// update condition is:
+			// min(camera displacement, camera rotation in radians)^2 > EPS
+			// using small-angle approximation cos(x/2) = 1 - x^2 / 8
+
+			if ( zoomChanged ||
+				lastPosition.distanceToSquared( scope.object.position ) > EPS ||
+				8 * ( 1 - lastQuaternion.dot( scope.object.quaternion ) ) > EPS ) {
+
+				scope.dispatchEvent( changeEvent );
+
+				lastPosition.copy( scope.object.position );
+				lastQuaternion.copy( scope.object.quaternion );
+				zoomChanged = false;
+
+				return true;
+
+			}
+
+			return false;
+
+		};
+
+	}();
+
+	this.dispose = function () {
+
+		scope.domElement.removeEventListener( 'contextmenu', onContextMenu, false );
+		scope.domElement.removeEventListener( 'mousedown', onMouseDown, false );
+		scope.domElement.removeEventListener( 'wheel', onMouseWheel, false );
+
+		scope.domElement.removeEventListener( 'touchstart', onTouchStart, false );
+		scope.domElement.removeEventListener( 'touchend', onTouchEnd, false );
+		scope.domElement.removeEventListener( 'touchmove', onTouchMove, false );
+
+		document.removeEventListener( 'mousemove', onMouseMove, false );
+		document.removeEventListener( 'mouseup', onMouseUp, false );
+
+		scope.domElement.removeEventListener( 'keydown', onKeyDown, false );
+
+		//scope.dispatchEvent( { type: 'dispose' } ); // should this be added here?
+
+	};
+
+	//
+	// internals
+	//
+
+	var scope = this;
+
+	var changeEvent = { type: 'change' };
+	var startEvent = { type: 'start' };
+	var endEvent = { type: 'end' };
+
+	var STATE = {
+		NONE: - 1,
+		ROTATE: 0,
+		DOLLY: 1,
+		PAN: 2,
+		TOUCH_ROTATE: 3,
+		TOUCH_PAN: 4,
+		TOUCH_DOLLY_PAN: 5,
+		TOUCH_DOLLY_ROTATE: 6
+	};
+
+	var state = STATE.NONE;
+
+	var EPS = 0.000001;
+
+	// current position in spherical coordinates
+	var spherical = new Spherical();
+	var sphericalDelta = new Spherical();
+
+	var scale = 1;
+	var panOffset = new Vector3();
+	var zoomChanged = false;
+
+	var rotateStart = new Vector2();
+	var rotateEnd = new Vector2();
+	var rotateDelta = new Vector2();
+
+	var panStart = new Vector2();
+	var panEnd = new Vector2();
+	var panDelta = new Vector2();
+
+	var dollyStart = new Vector2();
+	var dollyEnd = new Vector2();
+	var dollyDelta = new Vector2();
+
+	function getAutoRotationAngle() {
+
+		return 2 * Math.PI / 60 / 60 * scope.autoRotateSpeed;
+
+	}
+
+	function getZoomScale() {
+
+		return Math.pow( 0.95, scope.zoomSpeed );
+
+	}
+
+	function rotateLeft( angle ) {
+
+		sphericalDelta.theta -= angle;
+
+	}
+
+	function rotateUp( angle ) {
+
+		sphericalDelta.phi -= angle;
+
+	}
+
+	var panLeft = function () {
+
+		var v = new Vector3();
+
+		return function panLeft( distance, objectMatrix ) {
+
+			v.setFromMatrixColumn( objectMatrix, 0 ); // get X column of objectMatrix
+			v.multiplyScalar( - distance );
+
+			panOffset.add( v );
+
+		};
+
+	}();
+
+	var panUp = function () {
+
+		var v = new Vector3();
+
+		return function panUp( distance, objectMatrix ) {
+
+			if ( scope.screenSpacePanning === true ) {
+
+				v.setFromMatrixColumn( objectMatrix, 1 );
+
+			} else {
+
+				v.setFromMatrixColumn( objectMatrix, 0 );
+				v.crossVectors( scope.object.up, v );
+
+			}
+
+			v.multiplyScalar( distance );
+
+			panOffset.add( v );
+
+		};
+
+	}();
+
+	// deltaX and deltaY are in pixels; right and down are positive
+	var pan = function () {
+
+		var offset = new Vector3();
+
+		return function pan( deltaX, deltaY ) {
+
+			var element = scope.domElement;
+
+			if ( scope.object.isPerspectiveCamera ) {
+
+				// perspective
+				var position = scope.object.position;
+				offset.copy( position ).sub( scope.target );
+				var targetDistance = offset.length();
+
+				// half of the fov is center to top of screen
+				targetDistance *= Math.tan( ( scope.object.fov / 2 ) * Math.PI / 180.0 );
+
+				// we use only clientHeight here so aspect ratio does not distort speed
+				panLeft( 2 * deltaX * targetDistance / element.clientHeight, scope.object.matrix );
+				panUp( 2 * deltaY * targetDistance / element.clientHeight, scope.object.matrix );
+
+			} else if ( scope.object.isOrthographicCamera ) {
+
+				// orthographic
+				panLeft( deltaX * ( scope.object.right - scope.object.left ) / scope.object.zoom / element.clientWidth, scope.object.matrix );
+				panUp( deltaY * ( scope.object.top - scope.object.bottom ) / scope.object.zoom / element.clientHeight, scope.object.matrix );
+
+			} else {
+
+				// camera neither orthographic nor perspective
+				console.warn( 'WARNING: CameraControls.js encountered an unknown camera type - pan disabled.' );
+				scope.enablePan = false;
+
+			}
+
+		};
+
+	}();
+
+	function dollyIn( dollyScale ) {
+
+		if ( scope.object.isPerspectiveCamera ) {
+
+			scale /= dollyScale;
+
+		} else if ( scope.object.isOrthographicCamera ) {
+
+			scope.object.zoom = Math.max( scope.minZoom, Math.min( scope.maxZoom, scope.object.zoom * dollyScale ) );
+			scope.object.updateProjectionMatrix();
+			zoomChanged = true;
+
+		} else {
+
+			console.warn( 'WARNING: CameraControls.js encountered an unknown camera type - dolly/zoom disabled.' );
+			scope.enableZoom = false;
+
+		}
+
+	}
+
+	function dollyOut( dollyScale ) {
+
+		if ( scope.object.isPerspectiveCamera ) {
+
+			scale *= dollyScale;
+
+		} else if ( scope.object.isOrthographicCamera ) {
+
+			scope.object.zoom = Math.max( scope.minZoom, Math.min( scope.maxZoom, scope.object.zoom / dollyScale ) );
+			scope.object.updateProjectionMatrix();
+			zoomChanged = true;
+
+		} else {
+
+			console.warn( 'WARNING: CameraControls.js encountered an unknown camera type - dolly/zoom disabled.' );
+			scope.enableZoom = false;
+
+		}
+
+	}
+
+	//
+	// event callbacks - update the object state
+	//
+
+	function handleMouseDownRotate( event ) {
+
+		rotateStart.set( event.clientX, event.clientY );
+
+	}
+
+	function handleMouseDownDolly( event ) {
+
+		dollyStart.set( event.clientX, event.clientY );
+
+	}
+
+	function handleMouseDownPan( event ) {
+
+		panStart.set( event.clientX, event.clientY );
+
+	}
+
+	function handleMouseMoveRotate( event ) {
+
+		rotateEnd.set( event.clientX, event.clientY );
+
+		rotateDelta.subVectors( rotateEnd, rotateStart ).multiplyScalar( scope.rotateSpeed );
+
+		var element = scope.domElement;
+
+		rotateLeft( 2 * Math.PI * rotateDelta.x / element.clientHeight ); // yes, height
+
+		rotateUp( 2 * Math.PI * rotateDelta.y / element.clientHeight );
+
+		rotateStart.copy( rotateEnd );
+
+		scope.update();
+
+	}
+
+	function handleMouseMoveDolly( event ) {
+
+		dollyEnd.set( event.clientX, event.clientY );
+
+		dollyDelta.subVectors( dollyEnd, dollyStart );
+
+		if ( dollyDelta.y > 0 ) {
+
+			dollyIn( getZoomScale() );
+
+		} else if ( dollyDelta.y < 0 ) {
+
+			dollyOut( getZoomScale() );
+
+		}
+
+		dollyStart.copy( dollyEnd );
+
+		scope.update();
+
+	}
+
+	function handleMouseMovePan( event ) {
+
+		panEnd.set( event.clientX, event.clientY );
+
+		panDelta.subVectors( panEnd, panStart ).multiplyScalar( scope.panSpeed );
+
+		pan( panDelta.x, panDelta.y );
+
+		panStart.copy( panEnd );
+
+		scope.update();
+
+	}
+
+	function handleMouseUp( /*event*/ ) {
+
+		// no-op
+
+	}
+
+	function handleMouseWheel( event ) {
+
+		if ( event.deltaY < 0 ) {
+
+			dollyOut( getZoomScale() );
+
+		} else if ( event.deltaY > 0 ) {
+
+			dollyIn( getZoomScale() );
+
+		}
+
+		scope.update();
+
+	}
+
+	function handleKeyDown( event ) {
+
+		var needsUpdate = false;
+
+		switch ( event.keyCode ) {
+
+			case scope.keys.UP:
+				pan( 0, scope.keyPanSpeed );
+				needsUpdate = true;
+				break;
+
+			case scope.keys.BOTTOM:
+				pan( 0, - scope.keyPanSpeed );
+				needsUpdate = true;
+				break;
+
+			case scope.keys.LEFT:
+				pan( scope.keyPanSpeed, 0 );
+				needsUpdate = true;
+				break;
+
+			case scope.keys.RIGHT:
+				pan( - scope.keyPanSpeed, 0 );
+				needsUpdate = true;
+				break;
+
+		}
+
+		if ( needsUpdate ) {
+
+			// prevent the browser from scrolling on cursor keys
+			event.preventDefault();
+
+			scope.update();
+
+		}
+
+
+	}
+
+	function handleTouchStartRotate( event ) {
+
+		if ( event.touches.length == 1 ) {
+
+			rotateStart.set( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY );
+
+		} else {
+
+			var x = 0.5 * ( event.touches[ 0 ].pageX + event.touches[ 1 ].pageX );
+			var y = 0.5 * ( event.touches[ 0 ].pageY + event.touches[ 1 ].pageY );
+
+			rotateStart.set( x, y );
+
+		}
+
+	}
+
+	function handleTouchStartPan( event ) {
+
+		if ( event.touches.length == 1 ) {
+
+			panStart.set( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY );
+
+		} else {
+
+			var x = 0.5 * ( event.touches[ 0 ].pageX + event.touches[ 1 ].pageX );
+			var y = 0.5 * ( event.touches[ 0 ].pageY + event.touches[ 1 ].pageY );
+
+			panStart.set( x, y );
+
+		}
+
+	}
+
+	function handleTouchStartDolly( event ) {
+
+		var dx = event.touches[ 0 ].pageX - event.touches[ 1 ].pageX;
+		var dy = event.touches[ 0 ].pageY - event.touches[ 1 ].pageY;
+
+		var distance = Math.sqrt( dx * dx + dy * dy );
+
+		dollyStart.set( 0, distance );
+
+	}
+
+	function handleTouchStartDollyPan( event ) {
+
+		if ( scope.enableZoom ) handleTouchStartDolly( event );
+
+		if ( scope.enablePan ) handleTouchStartPan( event );
+
+	}
+
+	function handleTouchStartDollyRotate( event ) {
+
+		if ( scope.enableZoom ) handleTouchStartDolly( event );
+
+		if ( scope.enableRotate ) handleTouchStartRotate( event );
+
+	}
+
+	function handleTouchMoveRotate( event ) {
+
+		if ( event.touches.length == 1 ) {
+
+			rotateEnd.set( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY );
+
+		} else {
+
+			var x = 0.5 * ( event.touches[ 0 ].pageX + event.touches[ 1 ].pageX );
+			var y = 0.5 * ( event.touches[ 0 ].pageY + event.touches[ 1 ].pageY );
+
+			rotateEnd.set( x, y );
+
+		}
+
+		rotateDelta.subVectors( rotateEnd, rotateStart ).multiplyScalar( scope.rotateSpeed );
+
+		var element = scope.domElement;
+
+		rotateLeft( 2 * Math.PI * rotateDelta.x / element.clientHeight ); // yes, height
+
+		rotateUp( 2 * Math.PI * rotateDelta.y / element.clientHeight );
+
+		rotateStart.copy( rotateEnd );
+
+	}
+
+	function handleTouchMovePan( event ) {
+
+		if ( event.touches.length == 1 ) {
+
+			panEnd.set( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY );
+
+		} else {
+
+			var x = 0.5 * ( event.touches[ 0 ].pageX + event.touches[ 1 ].pageX );
+			var y = 0.5 * ( event.touches[ 0 ].pageY + event.touches[ 1 ].pageY );
+
+			panEnd.set( x, y );
+
+		}
+
+		panDelta.subVectors( panEnd, panStart ).multiplyScalar( scope.panSpeed );
+
+		pan( panDelta.x, panDelta.y );
+
+		panStart.copy( panEnd );
+
+	}
+
+	function handleTouchMoveDolly( event ) {
+
+		var dx = event.touches[ 0 ].pageX - event.touches[ 1 ].pageX;
+		var dy = event.touches[ 0 ].pageY - event.touches[ 1 ].pageY;
+
+		var distance = Math.sqrt( dx * dx + dy * dy );
+
+		dollyEnd.set( 0, distance );
+
+		dollyDelta.set( 0, Math.pow( dollyEnd.y / dollyStart.y, scope.zoomSpeed ) );
+
+		dollyIn( dollyDelta.y );
+
+		dollyStart.copy( dollyEnd );
+
+	}
+
+	function handleTouchMoveDollyPan( event ) {
+
+		if ( scope.enableZoom ) handleTouchMoveDolly( event );
+
+		if ( scope.enablePan ) handleTouchMovePan( event );
+
+	}
+
+	function handleTouchMoveDollyRotate( event ) {
+
+		if ( scope.enableZoom ) handleTouchMoveDolly( event );
+
+		if ( scope.enableRotate ) handleTouchMoveRotate( event );
+
+	}
+
+	function handleTouchEnd( /*event*/ ) {
+
+		// no-op
+
+	}
+
+	//
+	// event handlers - FSM: listen for events and reset state
+	//
+
+	function onMouseDown( event ) {
+
+		if ( scope.enabled === false ) return;
+
+		// Prevent the browser from scrolling.
+
+		event.preventDefault();
+
+		// Manually set the focus since calling preventDefault above
+		// prevents the browser from setting it automatically.
+
+		scope.domElement.focus ? scope.domElement.focus() : window.focus();
+
+		var mouseAction;
+
+		switch ( event.button ) {
+
+			case 0:
+
+				mouseAction = scope.mouseButtons.LEFT;
+				break;
+
+			case 1:
+
+				mouseAction = scope.mouseButtons.MIDDLE;
+				break;
+
+			case 2:
+
+				mouseAction = scope.mouseButtons.RIGHT;
+				break;
+
+			default:
+
+				mouseAction = - 1;
+
+		}
+
+		switch ( mouseAction ) {
+
+			case MOUSE.DOLLY:
+
+				if ( scope.enableZoom === false ) return;
+
+				handleMouseDownDolly( event );
+
+				state = STATE.DOLLY;
+
+				break;
+
+			case MOUSE.ROTATE:
+
+				if ( event.ctrlKey || event.metaKey || event.shiftKey ) {
+
+					if ( scope.enablePan === false ) return;
+
+					handleMouseDownPan( event );
+
+					state = STATE.PAN;
+
+				} else {
+
+					if ( scope.enableRotate === false ) return;
+
+					handleMouseDownRotate( event );
+
+					state = STATE.ROTATE;
+
+				}
+
+				break;
+
+			case MOUSE.PAN:
+
+				if ( event.ctrlKey || event.metaKey || event.shiftKey ) {
+
+					if ( scope.enableRotate === false ) return;
+
+					handleMouseDownRotate( event );
+
+					state = STATE.ROTATE;
+
+				} else {
+
+					if ( scope.enablePan === false ) return;
+
+					handleMouseDownPan( event );
+
+					state = STATE.PAN;
+
+				}
+
+				break;
+
+			default:
+
+				state = STATE.NONE;
+
+		}
+
+		if ( state !== STATE.NONE ) {
+
+			document.addEventListener( 'mousemove', onMouseMove, false );
+			document.addEventListener( 'mouseup', onMouseUp, false );
+
+			scope.dispatchEvent( startEvent );
+
+		}
+
+	}
+
+	function onMouseMove( event ) {
+
+		if ( scope.enabled === false ) return;
+
+		event.preventDefault();
+
+		switch ( state ) {
+
+			case STATE.ROTATE:
+
+				if ( scope.enableRotate === false ) return;
+
+				handleMouseMoveRotate( event );
+
+				break;
+
+			case STATE.DOLLY:
+
+				if ( scope.enableZoom === false ) return;
+
+				handleMouseMoveDolly( event );
+
+				break;
+
+			case STATE.PAN:
+
+				if ( scope.enablePan === false ) return;
+
+				handleMouseMovePan( event );
+
+				break;
+
+		}
+
+	}
+
+	function onMouseUp( event ) {
+
+		if ( scope.enabled === false ) return;
+
+		handleMouseUp( event );
+
+		document.removeEventListener( 'mousemove', onMouseMove, false );
+		document.removeEventListener( 'mouseup', onMouseUp, false );
+
+		scope.dispatchEvent( endEvent );
+
+		state = STATE.NONE;
+
+	}
+
+	function onMouseWheel( event ) {
+
+		if ( scope.enabled === false || scope.enableZoom === false || ( state !== STATE.NONE && state !== STATE.ROTATE ) ) return;
+
+		event.preventDefault();
+		event.stopPropagation();
+
+		scope.dispatchEvent( startEvent );
+
+		handleMouseWheel( event );
+
+		scope.dispatchEvent( endEvent );
+
+	}
+
+	function onKeyDown( event ) {
+
+		if ( scope.enabled === false || scope.enableKeys === false || scope.enablePan === false ) return;
+
+		handleKeyDown( event );
+
+	}
+
+	function onTouchStart( event ) {
+
+		if ( scope.enabled === false ) return;
+
+		event.preventDefault();
+
+		switch ( event.touches.length ) {
+
+			case 1:
+
+				switch ( scope.touches.ONE ) {
+
+					case TOUCH.ROTATE:
+
+						if ( scope.enableRotate === false ) return;
+
+						handleTouchStartRotate( event );
+
+						state = STATE.TOUCH_ROTATE;
+
+						break;
+
+					case TOUCH.PAN:
+
+						if ( scope.enablePan === false ) return;
+
+						handleTouchStartPan( event );
+
+						state = STATE.TOUCH_PAN;
+
+						break;
+
+					default:
+
+						state = STATE.NONE;
+
+				}
+
+				break;
+
+			case 2:
+
+				switch ( scope.touches.TWO ) {
+
+					case TOUCH.DOLLY_PAN:
+
+						if ( scope.enableZoom === false && scope.enablePan === false ) return;
+
+						handleTouchStartDollyPan( event );
+
+						state = STATE.TOUCH_DOLLY_PAN;
+
+						break;
+
+					case TOUCH.DOLLY_ROTATE:
+
+						if ( scope.enableZoom === false && scope.enableRotate === false ) return;
+
+						handleTouchStartDollyRotate( event );
+
+						state = STATE.TOUCH_DOLLY_ROTATE;
+
+						break;
+
+					default:
+
+						state = STATE.NONE;
+
+				}
+
+				break;
+
+			default:
+
+				state = STATE.NONE;
+
+		}
+
+		if ( state !== STATE.NONE ) {
+
+			scope.dispatchEvent( startEvent );
+
+		}
+
+	}
+
+	function onTouchMove( event ) {
+
+		if ( scope.enabled === false ) return;
+
+		event.preventDefault();
+		event.stopPropagation();
+
+		switch ( state ) {
+
+			case STATE.TOUCH_ROTATE:
+
+				if ( scope.enableRotate === false ) return;
+
+				handleTouchMoveRotate( event );
+
+				scope.update();
+
+				break;
+
+			case STATE.TOUCH_PAN:
+
+				if ( scope.enablePan === false ) return;
+
+				handleTouchMovePan( event );
+
+				scope.update();
+
+				break;
+
+			case STATE.TOUCH_DOLLY_PAN:
+
+				if ( scope.enableZoom === false && scope.enablePan === false ) return;
+
+				handleTouchMoveDollyPan( event );
+
+				scope.update();
+
+				break;
+
+			case STATE.TOUCH_DOLLY_ROTATE:
+
+				if ( scope.enableZoom === false && scope.enableRotate === false ) return;
+
+				handleTouchMoveDollyRotate( event );
+
+				scope.update();
+
+				break;
+
+			default:
+
+				state = STATE.NONE;
+
+		}
+
+	}
+
+	function onTouchEnd( event ) {
+
+		if ( scope.enabled === false ) return;
+
+		handleTouchEnd( event );
+
+		scope.dispatchEvent( endEvent );
+
+		state = STATE.NONE;
+
+	}
+
+	function onContextMenu( event ) {
+
+		if ( scope.enabled === false ) return;
+
+		event.preventDefault();
+
+	}
+
+	//
+
+	scope.domElement.addEventListener( 'contextmenu', onContextMenu, false );
+
+	scope.domElement.addEventListener( 'mousedown', onMouseDown, false );
+	scope.domElement.addEventListener( 'wheel', onMouseWheel, false );
+
+	scope.domElement.addEventListener( 'touchstart', onTouchStart, false );
+	scope.domElement.addEventListener( 'touchend', onTouchEnd, false );
+	scope.domElement.addEventListener( 'touchmove', onTouchMove, false );
+
+	scope.domElement.addEventListener( 'keydown', onKeyDown, false );
+
+	// make sure element can receive keys.
+
+	if ( scope.domElement.tabIndex === - 1 ) {
+
+		scope.domElement.tabIndex = 0;
+
+	}
+
+	// force an update at start
+
+	this.object.lookAt( scope.target );
+	this.update();
+	this.saveState();
+
+};
+
+CameraControls.prototype = Object.create( EventDispatcher.prototype );
+CameraControls.prototype.constructor = CameraControls;
+
+
+// OrbitControls maintains the "up" direction, camera.up (+Y by default).
+//
+//    Orbit - left mouse / touch: one-finger move
+//    Zoom - middle mouse, or mousewheel / touch: two-finger spread or squish
+//    Pan - right mouse, or left mouse + ctrl/meta/shiftKey, or arrow keys / touch: two-finger move
+
+var OrbitControls = function ( object, domElement ) {
+
+	CameraControls.call( this, object, domElement );
+
+	this.mouseButtons.LEFT = MOUSE.ROTATE;
+	this.mouseButtons.RIGHT = MOUSE.PAN;
+
+	this.touches.ONE = TOUCH.ROTATE;
+	this.touches.TWO = TOUCH.DOLLY_PAN;
+
+};
+
+OrbitControls.prototype = Object.create( EventDispatcher.prototype );
+OrbitControls.prototype.constructor = OrbitControls;
+
+
+// MapControls maintains the "up" direction, camera.up (+Y by default)
+//
+//    Orbit - right mouse, or left mouse + ctrl/meta/shiftKey / touch: two-finger rotate
+//    Zoom - middle mouse, or mousewheel / touch: two-finger spread or squish
+//    Pan - left mouse, or left right + ctrl/meta/shiftKey, or arrow keys / touch: one-finger move
+
+
+var MapControls = function ( object, domElement ) {
+
+	CameraControls.call( this, object, domElement );
+
+	this.mouseButtons.LEFT = MOUSE.PAN;
+	this.mouseButtons.RIGHT = MOUSE.ROTATE;
+
+	this.touches.ONE = TOUCH.PAN;
+	this.touches.TWO = TOUCH.DOLLY_ROTATE;
+
+};
+
+MapControls.prototype = Object.create( EventDispatcher.prototype );
+MapControls.prototype.constructor = MapControls;
+
+
+// TrackballControls allows the camera to rotate over the polls and does not maintain camera.up
+//
+//    Orbit - left mouse / touch: one-finger move
+//    Zoom - middle mouse, or mousewheel / touch: two-finger spread or squish
+//    Pan - right mouse, or left mouse + ctrl/meta/shiftKey, or arrow keys / touch: two-finger move
+
+var TrackballControls = function ( object, domElement ) {
+
+	CameraControls.call( this, object, domElement );
+
+	this.trackball = true;
+	this.screenSpacePanning = true;
+	this.autoRotate = false;
+
+	this.mouseButtons.LEFT = MOUSE.ROTATE;
+	this.mouseButtons.RIGHT = MOUSE.PAN;
+
+	this.touches.ONE = TOUCH.ROTATE;
+	this.touches.TWO = TOUCH.DOLLY_PAN;
+
+};
+
+TrackballControls.prototype = Object.create( EventDispatcher.prototype );
+TrackballControls.prototype.constructor = TrackballControls;
+
+
+export { CameraControls, OrbitControls, MapControls, TrackballControls };

examples/misc_controls_map.html

@@ -28,7 +28,7 @@
 
 			import { GUI } from './jsm/libs/dat.gui.module.js';
 
-			import { MapControls } from './jsm/controls/OrbitControls.js';
+			import { MapControls } from './jsm/controls/CameraControls.js';
 
 			var camera, controls, scene, renderer;
 

examples/misc_controls_orbit.html

@@ -26,7 +26,7 @@
 
 			import * as THREE from '../build/three.module.js';
 
-			import { OrbitControls } from './jsm/controls/OrbitControls.js';
+			import { OrbitControls } from './jsm/controls/CameraControls.js';
 
 			var camera, controls, scene, renderer;
 

examples/misc_controls_trackball.html

@@ -18,8 +18,7 @@
 
 	<body>
 		<div id="info">
-			<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> - trackball controls<br />
-			MOVE mouse &amp; press LEFT/A: rotate, MIDDLE/S: zoom, RIGHT/D: pan
+			<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> - trackball controls
 		</div>
 
 		<script type="module">
@@ -29,9 +28,9 @@
 			import Stats from './jsm/libs/stats.module.js';
 			import { GUI } from './jsm/libs/dat.gui.module.js';
 
-			import { TrackballControls } from './jsm/controls/TrackballControls.js';
+			import { TrackballControls } from './jsm/controls/CameraControls.js';
 
-			var perspectiveCamera, orthographicCamera, controls, scene, renderer, stats;
+			var camera, perspectiveCamera, orthographicCamera, controls, scene, renderer, stats;
 
 			var params = {
 				orthographicCamera: false
@@ -52,6 +51,8 @@
 				orthographicCamera = new THREE.OrthographicCamera( frustumSize * aspect / - 2, frustumSize * aspect / 2, frustumSize / 2, frustumSize / - 2, 1, 1000 );
 				orthographicCamera.position.z = 500;
 
+				camera = perspectiveCamera;
+
 				// world
 
 				scene = new THREE.Scene();
@@ -103,7 +104,9 @@
 
 					controls.dispose();
 
-					createControls( value ? orthographicCamera : perspectiveCamera );
+					camera = ( value ) ? orthographicCamera : perspectiveCamera;
+
+					createControls( camera );
 
 				} );
 
@@ -119,11 +122,11 @@
 
 				controls = new TrackballControls( camera, renderer.domElement );
 
-				controls.rotateSpeed = 1.0;
-				controls.zoomSpeed = 1.2;
-				controls.panSpeed = 0.8;
-
-				controls.keys = [ 65, 83, 68 ];
+				controls.enableDamping = true;
+				controls.minDistance = 100;
+				controls.maxDistance = 1000;
+				controls.minZoom = 0.5;
+				controls.maxZoom = 2;
 
 			}
 
@@ -150,7 +153,7 @@
 
 				requestAnimationFrame( animate );
 
-				controls.update();
+				controls.update(); // required because damping is enabled
 
 				stats.update();
 
@@ -160,8 +163,6 @@
 
 			function render() {
 
-				var camera = ( params.orthographicCamera ) ? orthographicCamera : perspectiveCamera;
-
 				renderer.render( scene, camera );
 
 			}

utils/modularize.js

@@ -25,6 +25,7 @@ var files = [
 	{ path: 'controls/OrbitControls.js', dependencies: [], ignoreList: [] },
 	{ path: 'controls/PointerLockControls.js', dependencies: [], ignoreList: [] },
 	{ path: 'controls/TrackballControls.js', dependencies: [], ignoreList: [] },
+	{ path: 'controls/CameraControls.js', dependencies: [], ignoreList: [] },
 	{ path: 'controls/TransformControls.js', dependencies: [], ignoreList: [] },
 
 	{ path: 'curves/CurveExtras.js', dependencies: [], ignoreList: [] },