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/**

* @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

/*global THREE, console */

// This set of controls performs orbiting, dollying (zooming), and panning. It maintains

// the "up" direction as +Y, unlike the TrackballControls. Touch on tablet and phones is

// supported.

// Orbit - left mouse / touch: one finger move

// Zoom - middle mouse, or mousewheel / touch: two finger spread or squish

// Pan - right mouse, or arrow keys / touch: three finter swipe

// This is a drop-in replacement for (most) TrackballControls used in examples.

// That is, include this js file and wherever you see:

// controls = new THREE.TrackballControls( camera );

// controls.target.z = 150;

// Simple substitute "OrbitControls" and the control should work as-is.

THREE.OrbitControls = function ( object, domElement ) {

this.object = object;

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

// API

// Set to false to disable this control

this.enabled = true;

this.center = new THREE.Vector3();

// "target" sets the location of focus, where the control orbits around

// and where it pans with respect to.

this.target = new THREE.Vector3();

this.userZoom = true;

// center is old, deprecated; use "target" instead

this.userZoomSpeed = 1.0;

this.center = this.target;

this.userRotate = true;

// This option actually enables dollying in and out; left as "zoom" for

this.userRotateSpeed = 1.0;

// backwards compatibility

this.noZoom = false;

this.zoomSpeed = 1.0;

this.userPan = true;

// Limits to how far you can dolly in and out

this.userPanSpeed = 2.0;

this.minDistance = 0;

this.maxDistance = Infinity;

// Set to true to disable this control

this.noRotate = false;

this.rotateSpeed = 1.0;

// Set to true to disable this control

this.noPan = false;

this.keyPanSpeed = 7.0; // pixels moved per arrow key push

// Set to true to automatically rotate around the target

this.autoRotate = false;

this.autoRotateSpeed = 2.0; // 30 seconds per round when fps is 60

// 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

this.minDistance = 0;

// Set to true to disable use of the keys

this.maxDistance = Infinity;

this.noKeys = false;

// 65 /*A*/, 83 /*S*/, 68 /*D*/

// The four arrow keys

this.keys = { LEFT: 37, UP: 38, RIGHT: 39, BOTTOM: 40, ROTATE: 65, ZOOM: 83, PAN: 68 };

this.keys = { LEFT: 37, UP: 38, RIGHT: 39, BOTTOM: 40 };

////////////

// internals

var scope = this;

var EPS = 0.000001;

var PIXELS_PER_ROUND = 1800;

var rotateStart = new THREE.Vector2();

var rotateEnd = new THREE.Vector2();

var rotateDelta = new THREE.Vector2();

var zoomStart = new THREE.Vector2();

var panStart = new THREE.Vector2();

var zoomEnd = new THREE.Vector2();

var panEnd = new THREE.Vector2();

var zoomDelta = new THREE.Vector2();

var panDelta = new THREE.Vector2();

var panOffset = new THREE.Vector3();

var offset = new THREE.Vector3();

var dollyStart = new THREE.Vector2();

var dollyEnd = new THREE.Vector2();

var dollyDelta = new THREE.Vector2();

var phiDelta = 0;

var thetaDelta = 0;

var scale = 1;

var pan = new THREE.Vector3();

var lastPosition = new THREE.Vector3();

var lastQuaternion = new THREE.Quaternion();

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

var STATE = { NONE : -1, ROTATE : 0, DOLLY : 1, PAN : 2, TOUCH_ROTATE : 3, TOUCH_DOLLY : 4, TOUCH_PAN : 5 };

var state = STATE.NONE;

// for reset

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

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

// 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();

// events

var changeEvent = { type: 'change' };

var startEvent = { type: 'start'};

var endEvent = { type: 'end'};

this.rotateLeft = function ( angle ) {

if ( angle === undefined ) {

angle = getAutoRotationAngle();

}

thetaDelta -= angle;

};

this.rotateRight = function ( angle ) {

if ( angle === undefined ) {

Text moved with changes to lines 224-228 (90.3% similarity)

angle = getAutoRotationAngle();

}

thetaDelta += angle;

};

this.rotateUp = function ( angle ) {

if ( angle === undefined ) {

angle = getAutoRotationAngle();

}

phiDelta -= angle;

};

this.rotateDown = function ( angle ) {

// pass in distance in world space to move left

this.panLeft = function ( distance ) {

if ( angle === undefined ) {

var te = this.object.matrix.elements;

angle = getAutoRotationAngle();

// get X column of matrix

panOffset.set( te[ 0 ], te[ 1 ], te[ 2 ] );

panOffset.multiplyScalar( - distance );

pan.add( panOffset );

}

};

phiDelta += angle;

// pass in distance in world space to move up

this.panUp = function ( distance ) {

var te = this.object.matrix.elements;

// get Y column of matrix

panOffset.set( te[ 4 ], te[ 5 ], te[ 6 ] );

panOffset.multiplyScalar( distance );

pan.add( panOffset );

};

// pass in x,y of change desired in pixel space,

// right and down are positive

this.pan = function ( deltaX, deltaY ) {

this.zoomIn = function ( zoomScale ) {

var element = scope.domElement === document ? scope.domElement.body : scope.domElement;

if ( zoomScale === undefined ) {

if ( scope.object.fov !== undefined ) {

zoomScale = getZoomScale();

// perspective

var position = scope.object.position;

var offset = position.clone().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 actually don't use screenWidth, since perspective camera is fixed to screen height

scope.panLeft( 2 * deltaX * targetDistance / element.clientHeight );

scope.panUp( 2 * deltaY * targetDistance / element.clientHeight );

} else if ( scope.object.top !== undefined ) {

// orthographic

scope.panLeft( deltaX * (scope.object.right - scope.object.left) / element.clientWidth );

scope.panUp( deltaY * (scope.object.top - scope.object.bottom) / element.clientHeight );

} else {

// camera neither orthographic or perspective

console.warn( 'WARNING: OrbitControls.js encountered an unknown camera type - pan disabled.' );

}

scale /= zoomScale;

};

this.zoomOut = function ( zoomScale ) {

this.dollyIn = function ( dollyScale ) {

if ( zoomScale === undefined ) {

if ( dollyScale === undefined ) {

zoomScale = getZoomScale();

dollyScale = getZoomScale();

}

scale *= zoomScale;

scale /= dollyScale;

};

this.pan = function ( distance ) {

this.dollyOut = function ( dollyScale ) {

distance.transformDirection( this.object.matrix );

if ( dollyScale === undefined ) {

distance.multiplyScalar( scope.userPanSpeed );

Text moved with changes from lines 85-89 (90.3% similarity)

this.object.position.add( distance );

dollyScale = getZoomScale();

this.center.add( distance );

}

scale *= dollyScale;

};

this.update = function () {

var position = this.object.position;

var offset = position.clone().sub( this.center );

offset.copy( position ).sub( this.target );

// rotate offset to "y-axis-is-up" space

offset.applyQuaternion( quat );

// angle from z-axis around y-axis

var theta = Math.atan2( offset.x, offset.z );

// angle from y-axis

var phi = Math.atan2( Math.sqrt( offset.x * offset.x + offset.z * offset.z ), offset.y );

if ( this.autoRotate ) {

this.rotateLeft( getAutoRotationAngle() );

}

theta += thetaDelta;

phi += phiDelta;

// restrict phi to be between desired limits

phi = Math.max( this.minPolarAngle, Math.min( this.maxPolarAngle, phi ) );

// restrict phi to be betwee EPS and PI-EPS

phi = Math.max( EPS, Math.min( Math.PI - EPS, phi ) );

var radius = offset.length() * scale;

// restrict radius to be between desired limits

radius = Math.max( this.minDistance, Math.min( this.maxDistance, radius ) );

// move target to panned location

this.target.add( pan );

offset.x = radius * Math.sin( phi ) * Math.sin( theta );

offset.y = radius * Math.cos( phi );

offset.z = radius * Math.sin( phi ) * Math.cos( theta );

position.copy( this.center ).add( offset );

// rotate offset back to "camera-up-vector-is-up" space

offset.applyQuaternion( quatInverse );

this.object.lookAt( this.center );

position.copy( this.target ).add( offset );

this.object.lookAt( this.target );

thetaDelta = 0;

phiDelta = 0;

scale = 1;

pan.set( 0, 0, 0 );

if ( lastPosition.distanceTo( this.object.position ) > 0 ) {

// update condition is:

// min(camera displacement, camera rotation in radians)^2 > EPS

// using small-angle approximation cos(x/2) = 1 - x^2 / 8

if ( lastPosition.distanceToSquared( this.object.position ) > EPS

|| 8 * (1 - lastQuaternion.dot(this.object.quaternion)) > EPS ) {

this.dispatchEvent( changeEvent );

lastPosition.copy( this.object.position );

lastQuaternion.copy (this.object.quaternion );

}

};

this.reset = function () {

state = STATE.NONE;

this.target.copy( this.target0 );

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

this.update();

};

function getAutoRotationAngle() {

return 2 * Math.PI / 60 / 60 * scope.autoRotateSpeed;

}

function getZoomScale() {

return Math.pow( 0.95, scope.userZoomSpeed );

return Math.pow( 0.95, scope.zoomSpeed );

}

function onMouseDown( event ) {

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

if ( scope.userRotate === false ) return;

event.preventDefault();

if ( state === STATE.NONE )

if ( event.button === 0 ) {

{

if ( scope.noRotate === true ) return;

if ( event.button === 0 )

state = STATE.ROTATE;

if ( event.button === 1 )

state = STATE.ZOOM;

if ( event.button === 2 )

state = STATE.PAN;

}

if ( state === STATE.ROTATE ) {

//state = STATE.ROTATE;

state = STATE.ROTATE;

rotateStart.set( event.clientX, event.clientY );

} else if ( state === STATE.ZOOM ) {

} else if ( event.button === 1 ) {

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

//state = STATE.ZOOM;

state = STATE.DOLLY;

zoomStart.set( event.clientX, event.clientY );

dollyStart.set( event.clientX, event.clientY );

} else if ( state === STATE.PAN ) {

} else if ( event.button === 2 ) {

if ( scope.noPan === true ) return;

//state = STATE.PAN;

state = STATE.PAN;

panStart.set( event.clientX, event.clientY );

}

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

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

scope.dispatchEvent( startEvent );

}

function onMouseMove( event ) {

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

event.preventDefault();

var element = scope.domElement === document ? scope.domElement.body : scope.domElement;

if ( state === STATE.ROTATE ) {

if ( scope.noRotate === true ) return;

rotateEnd.set( event.clientX, event.clientY );

rotateDelta.subVectors( rotateEnd, rotateStart );

scope.rotateLeft( 2 * Math.PI * rotateDelta.x / PIXELS_PER_ROUND * scope.userRotateSpeed );

// rotating across whole screen goes 360 degrees around

scope.rotateUp( 2 * Math.PI * rotateDelta.y / PIXELS_PER_ROUND * scope.userRotateSpeed );

scope.rotateLeft( 2 * Math.PI * rotateDelta.x / element.clientWidth * scope.rotateSpeed );

// rotating up and down along whole screen attempts to go 360, but limited to 180

scope.rotateUp( 2 * Math.PI * rotateDelta.y / element.clientHeight * scope.rotateSpeed );

rotateStart.copy( rotateEnd );

} else if ( state === STATE.ZOOM ) {

} else if ( state === STATE.DOLLY ) {

zoomEnd.set( event.clientX, event.clientY );

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

zoomDelta.subVectors( zoomEnd, zoomStart );

if ( zoomDelta.y > 0 ) {

dollyEnd.set( event.clientX, event.clientY );

dollyDelta.subVectors( dollyEnd, dollyStart );

scope.zoomIn();

if ( dollyDelta.y > 0 ) {

scope.dollyIn();

} else {

scope.zoomOut();

scope.dollyOut();

}

zoomStart.copy( zoomEnd );

dollyStart.copy( dollyEnd );

} else if ( state === STATE.PAN ) {

var movementX = event.movementX || event.mozMovementX || event.webkitMovementX || 0;

if ( scope.noPan === true ) return;

var movementY = event.movementY || event.mozMovementY || event.webkitMovementY || 0;

scope.pan( new THREE.Vector3( - movementX, movementY, 0 ) );

panEnd.set( event.clientX, event.clientY );

panDelta.subVectors( panEnd, panStart );

scope.pan( panDelta.x, panDelta.y );

panStart.copy( panEnd );

}

scope.update();

}

function onMouseUp( event ) {

function onMouseUp( /* event */ ) {

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

if ( scope.userRotate === false ) return;

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

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

scope.dispatchEvent( endEvent );

state = STATE.NONE;

}

function onMouseWheel( event ) {

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

if ( scope.enabled === false || scope.noZoom === true ) return;

if ( scope.userZoom === false ) return;

event.preventDefault();

event.stopPropagation();

var delta = 0;

if ( event.wheelDelta ) { // WebKit / Opera / Explorer 9

if ( event.wheelDelta !== undefined ) { // WebKit / Opera / Explorer 9

delta = event.wheelDelta;

} else if ( event.detail ) { // Firefox

} else if ( event.detail !== undefined ) { // Firefox

delta = - event.detail;

}

if ( delta > 0 ) {

scope.zoomOut();

scope.dollyOut();

} else {

scope.zoomIn();

scope.dollyIn();

}

scope.update();

scope.dispatchEvent( startEvent );

scope.dispatchEvent( endEvent );

}

function onKeyDown( event ) {

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

if ( scope.enabled === false || scope.noKeys === true || scope.noPan === true ) return;

if ( scope.userPan === false ) return;

switch ( event.keyCode ) {

/*case scope.keys.UP:

case scope.keys.UP:

scope.pan( new THREE.Vector3( 0, 1, 0 ) );

scope.pan( 0, scope.keyPanSpeed );

scope.update();

break;

case scope.keys.BOTTOM:

scope.pan( new THREE.Vector3( 0, - 1, 0 ) );

scope.pan( 0, - scope.keyPanSpeed );

scope.update();

break;

case scope.keys.LEFT:

scope.pan( new THREE.Vector3( - 1, 0, 0 ) );

scope.pan( scope.keyPanSpeed, 0 );

scope.update();

break;

case scope.keys.RIGHT:

scope.pan( new THREE.Vector3( 1, 0, 0 ) );

scope.pan( - scope.keyPanSpeed, 0 );

scope.update();

break;

case scope.keys.ROTATE:

}

state = STATE.ROTATE;

}

function touchstart( event ) {

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

switch ( event.touches.length ) {

case 1: // one-fingered touch: rotate

if ( scope.noRotate === true ) return;

state = STATE.TOUCH_ROTATE;

rotateStart.set( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY );

break;

case scope.keys.ZOOM:

state = STATE.ZOOM;

case 2: // two-fingered touch: dolly

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

state = STATE.TOUCH_DOLLY;

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 );

break;

case scope.keys.PAN:

state = STATE.PAN;

case 3: // three-fingered touch: pan

if ( scope.noPan === true ) return;

state = STATE.TOUCH_PAN;

panStart.set( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY );

break;

default:

state = STATE.NONE;

}

scope.dispatchEvent( startEvent );

}

function onKeyUp( event ) {

switch ( event.keyCode ) {

function touchmove( event ) {

case scope.keys.ROTATE:

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

case scope.keys.ZOOM:

case scope.keys.PAN:

event.preventDefault();

event.stopPropagation();

var element = scope.domElement === document ? scope.domElement.body : scope.domElement;

switch ( event.touches.length ) {

case 1: // one-fingered touch: rotate

if ( scope.noRotate === true ) return;

if ( state !== STATE.TOUCH_ROTATE ) return;

rotateEnd.set( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY );

rotateDelta.subVectors( rotateEnd, rotateStart );

// rotating across whole screen goes 360 degrees around

scope.rotateLeft( 2 * Math.PI * rotateDelta.x / element.clientWidth * scope.rotateSpeed );

// rotating up and down along whole screen attempts to go 360, but limited to 180

scope.rotateUp( 2 * Math.PI * rotateDelta.y / element.clientHeight * scope.rotateSpeed );

rotateStart.copy( rotateEnd );

scope.update();

break;

case 2: // two-fingered touch: dolly

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

if ( state !== STATE.TOUCH_DOLLY ) return;

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.subVectors( dollyEnd, dollyStart );

if ( dollyDelta.y > 0 ) {

scope.dollyOut();

} else {

scope.dollyIn();

}

dollyStart.copy( dollyEnd );

scope.update();

break;

case 3: // three-fingered touch: pan

if ( scope.noPan === true ) return;

if ( state !== STATE.TOUCH_PAN ) return;

panEnd.set( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY );

panDelta.subVectors( panEnd, panStart );

scope.pan( panDelta.x, panDelta.y );

panStart.copy( panEnd );

scope.update();

break;

default:

state = STATE.NONE;

break;

}

function touchend( /* event */ ) {

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

scope.dispatchEvent( endEvent );

state = STATE.NONE;

}

this.domElement.addEventListener( 'contextmenu', function ( event ) { event.preventDefault(); }, false );

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

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

this.domElement.addEventListener( 'DOMMouseScroll', onMouseWheel, false ); // firefox

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

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

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

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

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

// force an update at start

this.update();

};

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

已保存差异

原始文本

打开文件

/**
 * @author qiao / https://github.com/qiao
 * @author mrdoob / http://mrdoob.com
 * @author alteredq / http://alteredqualia.com/
 * @author WestLangley / http://github.com/WestLangley
 */

THREE.OrbitControls = function ( object, domElement ) {

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

// API

this.enabled = true;

this.center = new THREE.Vector3();

this.userZoom = true;
	this.userZoomSpeed = 1.0;

this.userRotate = true;
	this.userRotateSpeed = 1.0;

this.userPan = true;
	this.userPanSpeed = 2.0;

this.autoRotate = false;
	this.autoRotateSpeed = 2.0; // 30 seconds per round when fps is 60

this.minPolarAngle = 0; // radians
	this.maxPolarAngle = Math.PI; // radians

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

// 65 /*A*/, 83 /*S*/, 68 /*D*/
	this.keys = { LEFT: 37, UP: 38, RIGHT: 39, BOTTOM: 40, ROTATE: 65, ZOOM: 83, PAN: 68 };

// internals

var scope = this;

var EPS = 0.000001;
	var PIXELS_PER_ROUND = 1800;

var rotateStart = new THREE.Vector2();
	var rotateEnd = new THREE.Vector2();
	var rotateDelta = new THREE.Vector2();

var zoomStart = new THREE.Vector2();
	var zoomEnd = new THREE.Vector2();
	var zoomDelta = new THREE.Vector2();

var phiDelta = 0;
	var thetaDelta = 0;
	var scale = 1;

var lastPosition = new THREE.Vector3();

var STATE = { NONE: -1, ROTATE: 0, ZOOM: 1, PAN: 2 };
	var state = STATE.NONE;

// events

var changeEvent = { type: 'change' };

this.rotateLeft = function ( angle ) {

if ( angle === undefined ) {

angle = getAutoRotationAngle();

}

thetaDelta -= angle;

};

this.rotateRight = function ( angle ) {

if ( angle === undefined ) {

angle = getAutoRotationAngle();

}

thetaDelta += angle;

};

this.rotateUp = function ( angle ) {

if ( angle === undefined ) {

angle = getAutoRotationAngle();

}

phiDelta -= angle;

};

this.rotateDown = function ( angle ) {

if ( angle === undefined ) {

angle = getAutoRotationAngle();

}

phiDelta += angle;

};

this.zoomIn = function ( zoomScale ) {

if ( zoomScale === undefined ) {

zoomScale = getZoomScale();

}

scale /= zoomScale;

};

this.zoomOut = function ( zoomScale ) {

if ( zoomScale === undefined ) {

zoomScale = getZoomScale();

}

scale *= zoomScale;

};

this.pan = function ( distance ) {

distance.transformDirection( this.object.matrix );
		distance.multiplyScalar( scope.userPanSpeed );

this.object.position.add( distance );
		this.center.add( distance );

};

this.update = function () {

var position = this.object.position;
		var offset = position.clone().sub( this.center );

// angle from z-axis around y-axis

var theta = Math.atan2( offset.x, offset.z );

// angle from y-axis

var phi = Math.atan2( Math.sqrt( offset.x * offset.x + offset.z * offset.z ), offset.y );

if ( this.autoRotate ) {

this.rotateLeft( getAutoRotationAngle() );

}

theta += thetaDelta;
		phi += phiDelta;

// restrict phi to be between desired limits
		phi = Math.max( this.minPolarAngle, Math.min( this.maxPolarAngle, phi ) );

// restrict phi to be betwee EPS and PI-EPS
		phi = Math.max( EPS, Math.min( Math.PI - EPS, phi ) );

var radius = offset.length() * scale;

// restrict radius to be between desired limits
		radius = Math.max( this.minDistance, Math.min( this.maxDistance, radius ) );

offset.x = radius * Math.sin( phi ) * Math.sin( theta );
		offset.y = radius * Math.cos( phi );
		offset.z = radius * Math.sin( phi ) * Math.cos( theta );

position.copy( this.center ).add( offset );

this.object.lookAt( this.center );

thetaDelta = 0;
		phiDelta = 0;
		scale = 1;

if ( lastPosition.distanceTo( this.object.position ) > 0 ) {

this.dispatchEvent( changeEvent );

lastPosition.copy( this.object.position );

}

};

function getAutoRotationAngle() {

return 2 * Math.PI / 60 / 60 * scope.autoRotateSpeed;

}

function getZoomScale() {

return Math.pow( 0.95, scope.userZoomSpeed );

}

function onMouseDown( event ) {

if ( scope.enabled === false ) return;
		if ( scope.userRotate === false ) return;

event.preventDefault();

if ( state === STATE.NONE )
		{
			if ( event.button === 0 )
				state = STATE.ROTATE;
			if ( event.button === 1 )
				state = STATE.ZOOM;
			if ( event.button === 2 )
				state = STATE.PAN;
		}
		
		
		if ( state === STATE.ROTATE ) {

//state = STATE.ROTATE;

rotateStart.set( event.clientX, event.clientY );

} else if ( state === STATE.ZOOM ) {

//state = STATE.ZOOM;

zoomStart.set( event.clientX, event.clientY );

} else if ( state === STATE.PAN ) {

//state = STATE.PAN;

}

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

}

function onMouseMove( event ) {

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

event.preventDefault();

if ( state === STATE.ROTATE ) {

rotateEnd.set( event.clientX, event.clientY );
			rotateDelta.subVectors( rotateEnd, rotateStart );

scope.rotateLeft( 2 * Math.PI * rotateDelta.x / PIXELS_PER_ROUND * scope.userRotateSpeed );
			scope.rotateUp( 2 * Math.PI * rotateDelta.y / PIXELS_PER_ROUND * scope.userRotateSpeed );

rotateStart.copy( rotateEnd );

} else if ( state === STATE.ZOOM ) {

zoomEnd.set( event.clientX, event.clientY );
			zoomDelta.subVectors( zoomEnd, zoomStart );

if ( zoomDelta.y > 0 ) {

scope.zoomIn();

} else {

scope.zoomOut();

}

zoomStart.copy( zoomEnd );

} else if ( state === STATE.PAN ) {

var movementX = event.movementX || event.mozMovementX || event.webkitMovementX || 0;
			var movementY = event.movementY || event.mozMovementY || event.webkitMovementY || 0;

scope.pan( new THREE.Vector3( - movementX, movementY, 0 ) );

}

function onMouseUp( event ) {

if ( scope.enabled === false ) return;
		if ( scope.userRotate === false ) return;

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

state = STATE.NONE;

}

function onMouseWheel( event ) {

if ( scope.enabled === false ) return;
		if ( scope.userZoom === false ) return;

var delta = 0;

if ( event.wheelDelta ) { // WebKit / Opera / Explorer 9

delta = event.wheelDelta;

} else if ( event.detail ) { // Firefox

delta = - event.detail;

}

if ( delta > 0 ) {

scope.zoomOut();

} else {

scope.zoomIn();

}

function onKeyDown( event ) {

if ( scope.enabled === false ) return;
		if ( scope.userPan === false ) return;

switch ( event.keyCode ) {

/*case scope.keys.UP:
				scope.pan( new THREE.Vector3( 0, 1, 0 ) );
				break;
			case scope.keys.BOTTOM:
				scope.pan( new THREE.Vector3( 0, - 1, 0 ) );
				break;
			case scope.keys.LEFT:
				scope.pan( new THREE.Vector3( - 1, 0, 0 ) );
				break;
			case scope.keys.RIGHT:
				scope.pan( new THREE.Vector3( 1, 0, 0 ) );
				break;
			*/
			case scope.keys.ROTATE:
				state = STATE.ROTATE;
				break;
			case scope.keys.ZOOM:
				state = STATE.ZOOM;
				break;
			case scope.keys.PAN:
				state = STATE.PAN;
				break;
				
		}

}
	
	function onKeyUp( event ) {

switch ( event.keyCode ) {

case scope.keys.ROTATE:
			case scope.keys.ZOOM:
			case scope.keys.PAN:
				state = STATE.NONE;
				break;
		}

}

this.domElement.addEventListener( 'contextmenu', function ( event ) { event.preventDefault(); }, false );
	this.domElement.addEventListener( 'mousedown', onMouseDown, false );
	this.domElement.addEventListener( 'mousewheel', onMouseWheel, false );
	this.domElement.addEventListener( 'DOMMouseScroll', onMouseWheel, false ); // firefox
	window.addEventListener( 'keydown', onKeyDown, false );
	window.addEventListener( 'keyup', onKeyUp, false );

};

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

更改后文本

打开文件

/**
 * @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
 */
/*global THREE, console */

// This set of controls performs orbiting, dollying (zooming), and panning. It maintains
// the "up" direction as +Y, unlike the TrackballControls. Touch on tablet and phones is
// supported.
//
//    Orbit - left mouse / touch: one finger move
//    Zoom - middle mouse, or mousewheel / touch: two finger spread or squish
//    Pan - right mouse, or arrow keys / touch: three finter swipe
//
// This is a drop-in replacement for (most) TrackballControls used in examples.
// That is, include this js file and wherever you see:
//    	controls = new THREE.TrackballControls( camera );
//      controls.target.z = 150;
// Simple substitute "OrbitControls" and the control should work as-is.

THREE.OrbitControls = function ( object, domElement ) {

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

// API

// Set to false to disable this control
	this.enabled = true;

// "target" sets the location of focus, where the control orbits around
	// and where it pans with respect to.
	this.target = new THREE.Vector3();

// center is old, deprecated; use "target" instead
	this.center = this.target;

// This option actually enables dollying in and out; left as "zoom" for
	// backwards compatibility
	this.noZoom = false;
	this.zoomSpeed = 1.0;

// Limits to how far you can dolly in and out
	this.minDistance = 0;
	this.maxDistance = Infinity;

// Set to true to disable this control
	this.noRotate = false;
	this.rotateSpeed = 1.0;

// Set to true to disable this control
	this.noPan = false;
	this.keyPanSpeed = 7.0;	// pixels moved per arrow key push

// Set to true to automatically rotate around the target
	this.autoRotate = false;
	this.autoRotateSpeed = 2.0; // 30 seconds per round when fps is 60

// 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

// Set to true to disable use of the keys
	this.noKeys = false;

// The four arrow keys
	this.keys = { LEFT: 37, UP: 38, RIGHT: 39, BOTTOM: 40 };

////////////
	// internals

var scope = this;

var EPS = 0.000001;

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 panOffset = new THREE.Vector3();

var offset = new THREE.Vector3();

var dollyStart = new THREE.Vector2();
	var dollyEnd = new THREE.Vector2();
	var dollyDelta = new THREE.Vector2();

var phiDelta = 0;
	var thetaDelta = 0;
	var scale = 1;
	var pan = new THREE.Vector3();

var lastPosition = new THREE.Vector3();
	var lastQuaternion = new THREE.Quaternion();

var STATE = { NONE : -1, ROTATE : 0, DOLLY : 1, PAN : 2, TOUCH_ROTATE : 3, TOUCH_DOLLY : 4, TOUCH_PAN : 5 };

var state = STATE.NONE;

// for reset

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

// 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();

// events

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

this.rotateLeft = function ( angle ) {

if ( angle === undefined ) {

angle = getAutoRotationAngle();

}

thetaDelta -= angle;

};

this.rotateUp = function ( angle ) {

if ( angle === undefined ) {

angle = getAutoRotationAngle();

}

phiDelta -= angle;

};

// pass in distance in world space to move left
	this.panLeft = function ( distance ) {

var te = this.object.matrix.elements;

// get X column of matrix
		panOffset.set( te[ 0 ], te[ 1 ], te[ 2 ] );
		panOffset.multiplyScalar( - distance );
		
		pan.add( panOffset );

};

// pass in distance in world space to move up
	this.panUp = function ( distance ) {

var te = this.object.matrix.elements;

// get Y column of matrix
		panOffset.set( te[ 4 ], te[ 5 ], te[ 6 ] );
		panOffset.multiplyScalar( distance );
		
		pan.add( panOffset );

};
	
	// pass in x,y of change desired in pixel space,
	// right and down are positive
	this.pan = function ( deltaX, deltaY ) {

var element = scope.domElement === document ? scope.domElement.body : scope.domElement;

if ( scope.object.fov !== undefined ) {

// perspective
			var position = scope.object.position;
			var offset = position.clone().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 actually don't use screenWidth, since perspective camera is fixed to screen height
			scope.panLeft( 2 * deltaX * targetDistance / element.clientHeight );
			scope.panUp( 2 * deltaY * targetDistance / element.clientHeight );

} else if ( scope.object.top !== undefined ) {

// orthographic
			scope.panLeft( deltaX * (scope.object.right - scope.object.left) / element.clientWidth );
			scope.panUp( deltaY * (scope.object.top - scope.object.bottom) / element.clientHeight );

} else {

// camera neither orthographic or perspective
			console.warn( 'WARNING: OrbitControls.js encountered an unknown camera type - pan disabled.' );

}

};

this.dollyIn = function ( dollyScale ) {

if ( dollyScale === undefined ) {

dollyScale = getZoomScale();

}

scale /= dollyScale;

};

this.dollyOut = function ( dollyScale ) {

if ( dollyScale === undefined ) {

dollyScale = getZoomScale();

}

scale *= dollyScale;

};

this.update = function () {

var position = this.object.position;

offset.copy( position ).sub( this.target );

// rotate offset to "y-axis-is-up" space
		offset.applyQuaternion( quat );

// angle from z-axis around y-axis

var theta = Math.atan2( offset.x, offset.z );

// angle from y-axis

var phi = Math.atan2( Math.sqrt( offset.x * offset.x + offset.z * offset.z ), offset.y );

if ( this.autoRotate ) {

this.rotateLeft( getAutoRotationAngle() );

}

theta += thetaDelta;
		phi += phiDelta;

// restrict phi to be between desired limits
		phi = Math.max( this.minPolarAngle, Math.min( this.maxPolarAngle, phi ) );

// restrict phi to be betwee EPS and PI-EPS
		phi = Math.max( EPS, Math.min( Math.PI - EPS, phi ) );

var radius = offset.length() * scale;

// restrict radius to be between desired limits
		radius = Math.max( this.minDistance, Math.min( this.maxDistance, radius ) );
		
		// move target to panned location
		this.target.add( pan );

offset.x = radius * Math.sin( phi ) * Math.sin( theta );
		offset.y = radius * Math.cos( phi );
		offset.z = radius * Math.sin( phi ) * Math.cos( theta );

// rotate offset back to "camera-up-vector-is-up" space
		offset.applyQuaternion( quatInverse );

position.copy( this.target ).add( offset );

this.object.lookAt( this.target );

thetaDelta = 0;
		phiDelta = 0;
		scale = 1;
		pan.set( 0, 0, 0 );

// update condition is:
		// min(camera displacement, camera rotation in radians)^2 > EPS
		// using small-angle approximation cos(x/2) = 1 - x^2 / 8

if ( lastPosition.distanceToSquared( this.object.position ) > EPS
		    || 8 * (1 - lastQuaternion.dot(this.object.quaternion)) > EPS ) {

this.dispatchEvent( changeEvent );

lastPosition.copy( this.object.position );
			lastQuaternion.copy (this.object.quaternion );

}

};

this.reset = function () {

state = STATE.NONE;

this.target.copy( this.target0 );
		this.object.position.copy( this.position0 );

this.update();

};

function getAutoRotationAngle() {

return 2 * Math.PI / 60 / 60 * scope.autoRotateSpeed;

}

function getZoomScale() {

return Math.pow( 0.95, scope.zoomSpeed );

}

function onMouseDown( event ) {

if ( scope.enabled === false ) return;
		event.preventDefault();

if ( event.button === 0 ) {
			if ( scope.noRotate === true ) return;

state = STATE.ROTATE;

rotateStart.set( event.clientX, event.clientY );

} else if ( event.button === 1 ) {
			if ( scope.noZoom === true ) return;

state = STATE.DOLLY;

dollyStart.set( event.clientX, event.clientY );

} else if ( event.button === 2 ) {
			if ( scope.noPan === true ) return;

state = STATE.PAN;

panStart.set( event.clientX, event.clientY );

}

document.addEventListener( 'mousemove', onMouseMove, false );
		document.addEventListener( 'mouseup', onMouseUp, false );
		scope.dispatchEvent( startEvent );

}

function onMouseMove( event ) {

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

event.preventDefault();

var element = scope.domElement === document ? scope.domElement.body : scope.domElement;

if ( state === STATE.ROTATE ) {

if ( scope.noRotate === true ) return;

rotateEnd.set( event.clientX, event.clientY );
			rotateDelta.subVectors( rotateEnd, rotateStart );

// rotating across whole screen goes 360 degrees around
			scope.rotateLeft( 2 * Math.PI * rotateDelta.x / element.clientWidth * scope.rotateSpeed );

// rotating up and down along whole screen attempts to go 360, but limited to 180
			scope.rotateUp( 2 * Math.PI * rotateDelta.y / element.clientHeight * scope.rotateSpeed );

rotateStart.copy( rotateEnd );

} else if ( state === STATE.DOLLY ) {

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

dollyEnd.set( event.clientX, event.clientY );
			dollyDelta.subVectors( dollyEnd, dollyStart );

if ( dollyDelta.y > 0 ) {

scope.dollyIn();

} else {

scope.dollyOut();

}

dollyStart.copy( dollyEnd );

} else if ( state === STATE.PAN ) {

if ( scope.noPan === true ) return;

panEnd.set( event.clientX, event.clientY );
			panDelta.subVectors( panEnd, panStart );
			
			scope.pan( panDelta.x, panDelta.y );

panStart.copy( panEnd );

}

scope.update();

}

function onMouseUp( /* event */ ) {

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

document.removeEventListener( 'mousemove', onMouseMove, false );
		document.removeEventListener( 'mouseup', onMouseUp, false );
		scope.dispatchEvent( endEvent );
		state = STATE.NONE;

}

function onMouseWheel( event ) {

if ( scope.enabled === false || scope.noZoom === true ) return;

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

var delta = 0;

if ( event.wheelDelta !== undefined ) { // WebKit / Opera / Explorer 9

delta = event.wheelDelta;

} else if ( event.detail !== undefined ) { // Firefox

delta = - event.detail;

}

if ( delta > 0 ) {

scope.dollyOut();

} else {

scope.dollyIn();

}

scope.update();
		scope.dispatchEvent( startEvent );
		scope.dispatchEvent( endEvent );

}

function onKeyDown( event ) {

if ( scope.enabled === false || scope.noKeys === true || scope.noPan === true ) return;
		
		switch ( event.keyCode ) {

case scope.keys.UP:
				scope.pan( 0, scope.keyPanSpeed );
				scope.update();
				break;

case scope.keys.BOTTOM:
				scope.pan( 0, - scope.keyPanSpeed );
				scope.update();
				break;

case scope.keys.LEFT:
				scope.pan( scope.keyPanSpeed, 0 );
				scope.update();
				break;

case scope.keys.RIGHT:
				scope.pan( - scope.keyPanSpeed, 0 );
				scope.update();
				break;

}

function touchstart( event ) {

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

switch ( event.touches.length ) {

case 1:	// one-fingered touch: rotate

if ( scope.noRotate === true ) return;

state = STATE.TOUCH_ROTATE;

rotateStart.set( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY );
				break;

case 2:	// two-fingered touch: dolly

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

state = STATE.TOUCH_DOLLY;

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 );
				break;

case 3: // three-fingered touch: pan

if ( scope.noPan === true ) return;

state = STATE.TOUCH_PAN;

panStart.set( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY );
				break;

default:

state = STATE.NONE;

}

scope.dispatchEvent( startEvent );

}

function touchmove( event ) {

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

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

var element = scope.domElement === document ? scope.domElement.body : scope.domElement;

switch ( event.touches.length ) {

case 1: // one-fingered touch: rotate

if ( scope.noRotate === true ) return;
				if ( state !== STATE.TOUCH_ROTATE ) return;

rotateEnd.set( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY );
				rotateDelta.subVectors( rotateEnd, rotateStart );

// rotating across whole screen goes 360 degrees around
				scope.rotateLeft( 2 * Math.PI * rotateDelta.x / element.clientWidth * scope.rotateSpeed );
				// rotating up and down along whole screen attempts to go 360, but limited to 180
				scope.rotateUp( 2 * Math.PI * rotateDelta.y / element.clientHeight * scope.rotateSpeed );

rotateStart.copy( rotateEnd );

scope.update();
				break;

case 2: // two-fingered touch: dolly

if ( scope.noZoom === true ) return;
				if ( state !== STATE.TOUCH_DOLLY ) return;

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.subVectors( dollyEnd, dollyStart );

if ( dollyDelta.y > 0 ) {

scope.dollyOut();

} else {

scope.dollyIn();

}

dollyStart.copy( dollyEnd );

scope.update();
				break;

case 3: // three-fingered touch: pan

if ( scope.noPan === true ) return;
				if ( state !== STATE.TOUCH_PAN ) return;

panEnd.set( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY );
				panDelta.subVectors( panEnd, panStart );
				
				scope.pan( panDelta.x, panDelta.y );

panStart.copy( panEnd );

scope.update();
				break;

default:

state = STATE.NONE;

}

function touchend( /* event */ ) {

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

scope.dispatchEvent( endEvent );
		state = STATE.NONE;

}

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

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

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

};

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