[134] | 1 | /** |
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| 2 | * @author Eberhard Graether / http://egraether.com/ |
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| 3 | * @author Mark Lundin / http://mark-lundin.com |
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| 4 | */ |
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| 5 | |
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| 6 | THREE.TrackballControls = function ( object, domElement ) { |
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| 7 | |
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| 8 | var _this = this; |
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| 9 | var STATE = { NONE: -1, ROTATE: 0, ZOOM: 1, PAN: 2, TOUCH_ROTATE: 3, TOUCH_ZOOM: 4, TOUCH_PAN: 5 }; |
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| 10 | |
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| 11 | this.object = object; |
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| 12 | this.domElement = ( domElement !== undefined ) ? domElement : document; |
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| 13 | |
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| 14 | // API |
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| 15 | |
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| 16 | this.enabled = true; |
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| 17 | |
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| 18 | this.screen = { left: 0, top: 0, width: 0, height: 0 }; |
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| 19 | |
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| 20 | this.rotateSpeed = 1.0; |
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| 21 | this.zoomSpeed = 1.2; |
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| 22 | this.panSpeed = 0.3; |
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| 23 | |
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| 24 | this.noRotate = false; |
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| 25 | this.noZoom = false; |
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| 26 | this.noPan = false; |
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| 27 | this.noRoll = false; |
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| 28 | |
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| 29 | this.staticMoving = false; |
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| 30 | this.dynamicDampingFactor = 0.2; |
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| 31 | |
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| 32 | this.minDistance = 0; |
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| 33 | this.maxDistance = Infinity; |
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| 34 | |
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| 35 | this.keys = [ 65 /*A*/, 83 /*S*/, 68 /*D*/ ]; |
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| 36 | |
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| 37 | // internals |
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| 38 | |
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| 39 | this.target = new THREE.Vector3(); |
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| 40 | |
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| 41 | var lastPosition = new THREE.Vector3(); |
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| 42 | |
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| 43 | var _state = STATE.NONE, |
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| 44 | _prevState = STATE.NONE, |
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| 45 | |
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| 46 | _eye = new THREE.Vector3(), |
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| 47 | |
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| 48 | _rotateStart = new THREE.Vector3(), |
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| 49 | _rotateEnd = new THREE.Vector3(), |
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| 50 | |
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| 51 | _zoomStart = new THREE.Vector2(), |
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| 52 | _zoomEnd = new THREE.Vector2(), |
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| 53 | |
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| 54 | _touchZoomDistanceStart = 0, |
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| 55 | _touchZoomDistanceEnd = 0, |
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| 56 | |
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| 57 | _panStart = new THREE.Vector2(), |
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| 58 | _panEnd = new THREE.Vector2(); |
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| 59 | |
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| 60 | // for reset |
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| 61 | |
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| 62 | this.target0 = this.target.clone(); |
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| 63 | this.position0 = this.object.position.clone(); |
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| 64 | this.up0 = this.object.up.clone(); |
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| 65 | |
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| 66 | // events |
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| 67 | |
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| 68 | var changeEvent = { type: 'change' }; |
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| 69 | var startEvent = { type: 'start'}; |
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| 70 | var endEvent = { type: 'end'}; |
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| 71 | |
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| 72 | |
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| 73 | // methods |
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| 74 | |
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| 75 | this.handleResize = function () { |
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| 76 | |
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| 77 | if ( this.domElement === document ) { |
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| 78 | |
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| 79 | this.screen.left = 0; |
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| 80 | this.screen.top = 0; |
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| 81 | this.screen.width = window.innerWidth; |
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| 82 | this.screen.height = window.innerHeight; |
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| 83 | |
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| 84 | } else { |
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| 85 | |
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| 86 | this.screen = this.domElement.getBoundingClientRect(); |
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| 87 | // adjustments come from similar code in the jquery offset() function |
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| 88 | var d = this.domElement.ownerDocument.documentElement |
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| 89 | this.screen.left += window.pageXOffset - d.clientLeft |
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| 90 | this.screen.top += window.pageYOffset - d.clientTop |
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| 91 | |
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| 92 | } |
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| 93 | |
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| 94 | }; |
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| 95 | |
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| 96 | this.handleEvent = function ( event ) { |
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| 97 | |
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| 98 | if ( typeof this[ event.type ] == 'function' ) { |
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| 99 | |
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| 100 | this[ event.type ]( event ); |
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| 101 | |
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| 102 | } |
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| 103 | |
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| 104 | }; |
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| 105 | |
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| 106 | this.getMouseOnScreen = function ( pageX, pageY, vector ) { |
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| 107 | |
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| 108 | return vector.set( |
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| 109 | ( pageX - _this.screen.left ) / _this.screen.width, |
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| 110 | ( pageY - _this.screen.top ) / _this.screen.height |
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| 111 | ); |
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| 112 | |
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| 113 | }; |
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| 114 | |
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| 115 | this.getMouseProjectionOnBall = (function(){ |
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| 116 | |
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| 117 | var objectUp = new THREE.Vector3(), |
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| 118 | mouseOnBall = new THREE.Vector3(); |
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| 119 | |
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| 120 | |
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| 121 | return function ( pageX, pageY, projection ) { |
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| 122 | |
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| 123 | mouseOnBall.set( |
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| 124 | ( pageX - _this.screen.width * 0.5 - _this.screen.left ) / (_this.screen.width*.5), |
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| 125 | ( _this.screen.height * 0.5 + _this.screen.top - pageY ) / (_this.screen.height*.5), |
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| 126 | 0.0 |
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| 127 | ); |
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| 128 | |
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| 129 | var length = mouseOnBall.length(); |
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| 130 | |
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| 131 | if ( _this.noRoll ) { |
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| 132 | |
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| 133 | if ( length < Math.SQRT1_2 ) { |
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| 134 | |
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| 135 | mouseOnBall.z = Math.sqrt( 1.0 - length*length ); |
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| 136 | |
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| 137 | } else { |
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| 138 | |
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| 139 | mouseOnBall.z = .5 / length; |
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| 140 | |
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| 141 | } |
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| 142 | |
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| 143 | } else if ( length > 1.0 ) { |
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| 144 | |
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| 145 | mouseOnBall.normalize(); |
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| 146 | |
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| 147 | } else { |
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| 148 | |
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| 149 | mouseOnBall.z = Math.sqrt( 1.0 - length * length ); |
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| 150 | |
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| 151 | } |
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| 152 | |
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| 153 | _eye.copy( _this.object.position ).sub( _this.target ); |
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| 154 | |
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| 155 | projection.copy( _this.object.up ).setLength( mouseOnBall.y ) |
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| 156 | projection.add( objectUp.copy( _this.object.up ).cross( _eye ).setLength( mouseOnBall.x ) ); |
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| 157 | projection.add( _eye.setLength( mouseOnBall.z ) ); |
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| 158 | |
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| 159 | return projection; |
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| 160 | } |
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| 161 | |
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| 162 | }()); |
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| 163 | |
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| 164 | this.rotateCamera = (function(){ |
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| 165 | |
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| 166 | var axis = new THREE.Vector3(), |
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| 167 | quaternion = new THREE.Quaternion(); |
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| 168 | |
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| 169 | |
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| 170 | return function () { |
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| 171 | |
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| 172 | var angle = Math.acos( _rotateStart.dot( _rotateEnd ) / _rotateStart.length() / _rotateEnd.length() ); |
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| 173 | |
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| 174 | if ( angle ) { |
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| 175 | |
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| 176 | axis.crossVectors( _rotateStart, _rotateEnd ).normalize(); |
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| 177 | |
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| 178 | angle *= _this.rotateSpeed; |
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| 179 | |
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| 180 | quaternion.setFromAxisAngle( axis, -angle ); |
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| 181 | |
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| 182 | _eye.applyQuaternion( quaternion ); |
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| 183 | _this.object.up.applyQuaternion( quaternion ); |
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| 184 | |
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| 185 | _rotateEnd.applyQuaternion( quaternion ); |
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| 186 | |
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| 187 | if ( _this.staticMoving ) { |
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| 188 | |
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| 189 | _rotateStart.copy( _rotateEnd ); |
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| 190 | |
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| 191 | } else { |
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| 192 | |
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| 193 | quaternion.setFromAxisAngle( axis, angle * ( _this.dynamicDampingFactor - 1.0 ) ); |
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| 194 | _rotateStart.applyQuaternion( quaternion ); |
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| 195 | |
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| 196 | } |
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| 197 | |
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| 198 | } |
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| 199 | } |
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| 200 | |
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| 201 | }()); |
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| 202 | |
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| 203 | this.zoomCamera = function () { |
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| 204 | |
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| 205 | if ( _state === STATE.TOUCH_ZOOM ) { |
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| 206 | |
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| 207 | var factor = _touchZoomDistanceStart / _touchZoomDistanceEnd; |
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| 208 | _touchZoomDistanceStart = _touchZoomDistanceEnd; |
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| 209 | _eye.multiplyScalar( factor ); |
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| 210 | |
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| 211 | } else { |
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| 212 | |
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| 213 | var factor = 1.0 + ( _zoomEnd.y - _zoomStart.y ) * _this.zoomSpeed; |
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| 214 | |
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| 215 | if ( factor !== 1.0 && factor > 0.0 ) { |
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| 216 | |
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| 217 | _eye.multiplyScalar( factor ); |
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| 218 | |
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| 219 | if ( _this.staticMoving ) { |
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| 220 | |
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| 221 | _zoomStart.copy( _zoomEnd ); |
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| 222 | |
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| 223 | } else { |
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| 224 | |
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| 225 | _zoomStart.y += ( _zoomEnd.y - _zoomStart.y ) * this.dynamicDampingFactor; |
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| 226 | |
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| 227 | } |
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| 228 | |
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| 229 | } |
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| 230 | |
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| 231 | } |
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| 232 | |
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| 233 | }; |
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| 234 | |
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| 235 | this.panCamera = (function(){ |
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| 236 | |
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| 237 | var mouseChange = new THREE.Vector2(), |
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| 238 | objectUp = new THREE.Vector3(), |
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| 239 | pan = new THREE.Vector3(); |
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| 240 | |
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| 241 | return function () { |
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| 242 | |
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| 243 | mouseChange.copy( _panEnd ).sub( _panStart ); |
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| 244 | |
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| 245 | if ( mouseChange.lengthSq() ) { |
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| 246 | |
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| 247 | mouseChange.multiplyScalar( _eye.length() * _this.panSpeed ); |
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| 248 | |
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| 249 | pan.copy( _eye ).cross( _this.object.up ).setLength( mouseChange.x ); |
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| 250 | pan.add( objectUp.copy( _this.object.up ).setLength( mouseChange.y ) ); |
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| 251 | |
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| 252 | _this.object.position.add( pan ); |
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| 253 | _this.target.add( pan ); |
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| 254 | |
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| 255 | if ( _this.staticMoving ) { |
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| 256 | |
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| 257 | _panStart.copy( _panEnd ); |
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| 258 | |
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| 259 | } else { |
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| 260 | |
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| 261 | _panStart.add( mouseChange.subVectors( _panEnd, _panStart ).multiplyScalar( _this.dynamicDampingFactor ) ); |
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| 262 | |
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| 263 | } |
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| 264 | |
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| 265 | } |
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| 266 | } |
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| 267 | |
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| 268 | }()); |
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| 269 | |
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| 270 | this.checkDistances = function () { |
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| 271 | |
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| 272 | if ( !_this.noZoom || !_this.noPan ) { |
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| 273 | |
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| 274 | if ( _eye.lengthSq() > _this.maxDistance * _this.maxDistance ) { |
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| 275 | |
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| 276 | _this.object.position.addVectors( _this.target, _eye.setLength( _this.maxDistance ) ); |
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| 277 | |
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| 278 | } |
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| 279 | |
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| 280 | if ( _eye.lengthSq() < _this.minDistance * _this.minDistance ) { |
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| 281 | |
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| 282 | _this.object.position.addVectors( _this.target, _eye.setLength( _this.minDistance ) ); |
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| 283 | |
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| 284 | } |
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| 285 | |
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| 286 | } |
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| 287 | |
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| 288 | }; |
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| 289 | |
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| 290 | this.update = function () { |
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| 291 | |
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| 292 | _eye.subVectors( _this.object.position, _this.target ); |
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| 293 | |
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| 294 | if ( !_this.noRotate ) { |
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| 295 | |
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| 296 | _this.rotateCamera(); |
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| 297 | |
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| 298 | } |
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| 299 | |
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| 300 | if ( !_this.noZoom ) { |
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| 301 | |
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| 302 | _this.zoomCamera(); |
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| 303 | |
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| 304 | } |
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| 305 | |
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| 306 | if ( !_this.noPan ) { |
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| 307 | |
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| 308 | _this.panCamera(); |
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| 309 | |
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| 310 | } |
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| 311 | |
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| 312 | _this.object.position.addVectors( _this.target, _eye ); |
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| 313 | |
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| 314 | _this.checkDistances(); |
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| 315 | |
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| 316 | _this.object.lookAt( _this.target ); |
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| 317 | |
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| 318 | if ( lastPosition.distanceToSquared( _this.object.position ) > 0 ) { |
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| 319 | |
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| 320 | _this.dispatchEvent( changeEvent ); |
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| 321 | |
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| 322 | lastPosition.copy( _this.object.position ); |
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| 323 | |
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| 324 | } |
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| 325 | |
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| 326 | }; |
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| 327 | |
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| 328 | this.reset = function () { |
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| 329 | |
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| 330 | _state = STATE.NONE; |
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| 331 | _prevState = STATE.NONE; |
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| 332 | |
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| 333 | _this.target.copy( _this.target0 ); |
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| 334 | _this.object.position.copy( _this.position0 ); |
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| 335 | _this.object.up.copy( _this.up0 ); |
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| 336 | |
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| 337 | _eye.subVectors( _this.object.position, _this.target ); |
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| 338 | |
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| 339 | _this.object.lookAt( _this.target ); |
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| 340 | |
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| 341 | _this.dispatchEvent( changeEvent ); |
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| 342 | |
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| 343 | lastPosition.copy( _this.object.position ); |
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| 344 | |
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| 345 | }; |
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| 346 | |
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| 347 | // listeners |
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| 348 | |
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| 349 | function keydown( event ) { |
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| 350 | |
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| 351 | if ( _this.enabled === false ) return; |
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| 352 | |
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| 353 | window.removeEventListener( 'keydown', keydown ); |
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| 354 | |
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| 355 | _prevState = _state; |
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| 356 | |
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| 357 | if ( _state !== STATE.NONE ) { |
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| 358 | |
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| 359 | return; |
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| 360 | |
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| 361 | } else if ( event.keyCode === _this.keys[ STATE.ROTATE ] && !_this.noRotate ) { |
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| 362 | |
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| 363 | _state = STATE.ROTATE; |
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| 364 | |
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| 365 | } else if ( event.keyCode === _this.keys[ STATE.ZOOM ] && !_this.noZoom ) { |
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| 366 | |
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| 367 | _state = STATE.ZOOM; |
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| 368 | |
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| 369 | } else if ( event.keyCode === _this.keys[ STATE.PAN ] && !_this.noPan ) { |
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| 370 | |
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| 371 | _state = STATE.PAN; |
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| 372 | |
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| 373 | } |
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| 374 | |
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| 375 | } |
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| 376 | |
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| 377 | function keyup( event ) { |
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| 378 | |
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| 379 | if ( _this.enabled === false ) return; |
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| 380 | |
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| 381 | _state = _prevState; |
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| 382 | |
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| 383 | window.addEventListener( 'keydown', keydown, false ); |
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| 384 | |
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| 385 | } |
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| 386 | |
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| 387 | function mousedown( event ) { |
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| 388 | |
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| 389 | if ( _this.enabled === false ) return; |
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| 390 | |
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| 391 | event.preventDefault(); |
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| 392 | event.stopPropagation(); |
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| 393 | |
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| 394 | if ( _state === STATE.NONE ) { |
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| 395 | |
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| 396 | _state = event.button; |
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| 397 | |
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| 398 | } |
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| 399 | |
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| 400 | if ( _state === STATE.ROTATE && !_this.noRotate ) { |
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| 401 | |
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| 402 | _this.getMouseProjectionOnBall( event.pageX, event.pageY, _rotateStart ); |
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| 403 | _rotateEnd.copy(_rotateStart) |
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| 404 | |
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| 405 | } else if ( _state === STATE.ZOOM && !_this.noZoom ) { |
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| 406 | |
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| 407 | _this.getMouseOnScreen( event.pageX, event.pageY, _zoomStart ); |
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| 408 | _zoomEnd.copy(_zoomStart); |
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| 409 | |
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| 410 | } else if ( _state === STATE.PAN && !_this.noPan ) { |
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| 411 | |
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| 412 | _this.getMouseOnScreen( event.pageX, event.pageY, _panStart ); |
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| 413 | _panEnd.copy(_panStart) |
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| 414 | |
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| 415 | } |
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| 416 | |
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| 417 | document.addEventListener( 'mousemove', mousemove, false ); |
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| 418 | document.addEventListener( 'mouseup', mouseup, false ); |
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| 419 | _this.dispatchEvent( startEvent ); |
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| 420 | |
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| 421 | |
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| 422 | } |
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| 423 | |
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| 424 | function mousemove( event ) { |
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| 425 | |
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| 426 | if ( _this.enabled === false ) return; |
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| 427 | |
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| 428 | event.preventDefault(); |
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| 429 | event.stopPropagation(); |
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| 430 | |
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| 431 | if ( _state === STATE.ROTATE && !_this.noRotate ) { |
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| 432 | |
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| 433 | _this.getMouseProjectionOnBall( event.pageX, event.pageY, _rotateEnd ); |
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| 434 | |
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| 435 | } else if ( _state === STATE.ZOOM && !_this.noZoom ) { |
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| 436 | |
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| 437 | _this.getMouseOnScreen( event.pageX, event.pageY, _zoomEnd ); |
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| 438 | |
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| 439 | } else if ( _state === STATE.PAN && !_this.noPan ) { |
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| 440 | |
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| 441 | _this.getMouseOnScreen( event.pageX, event.pageY, _panEnd ); |
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| 442 | |
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| 443 | } |
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| 444 | |
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| 445 | } |
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| 446 | |
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| 447 | function mouseup( event ) { |
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| 448 | |
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| 449 | if ( _this.enabled === false ) return; |
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| 450 | |
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| 451 | event.preventDefault(); |
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| 452 | event.stopPropagation(); |
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| 453 | |
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| 454 | _state = STATE.NONE; |
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| 455 | |
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| 456 | document.removeEventListener( 'mousemove', mousemove ); |
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| 457 | document.removeEventListener( 'mouseup', mouseup ); |
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| 458 | _this.dispatchEvent( endEvent ); |
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| 459 | |
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| 460 | } |
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| 461 | |
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| 462 | function mousewheel( event ) { |
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| 463 | |
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| 464 | if ( _this.enabled === false ) return; |
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| 465 | |
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| 466 | event.preventDefault(); |
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| 467 | event.stopPropagation(); |
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| 468 | |
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| 469 | var delta = 0; |
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| 470 | |
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| 471 | if ( event.wheelDelta ) { // WebKit / Opera / Explorer 9 |
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| 472 | |
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| 473 | delta = event.wheelDelta / 40; |
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| 474 | |
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| 475 | } else if ( event.detail ) { // Firefox |
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| 476 | |
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| 477 | delta = - event.detail / 3; |
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| 478 | |
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| 479 | } |
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| 480 | |
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| 481 | _zoomStart.y += delta * 0.01; |
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| 482 | _this.dispatchEvent( startEvent ); |
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| 483 | _this.dispatchEvent( endEvent ); |
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| 484 | |
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| 485 | } |
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| 486 | |
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| 487 | function touchstart( event ) { |
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| 488 | |
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| 489 | if ( _this.enabled === false ) return; |
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| 490 | |
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| 491 | switch ( event.touches.length ) { |
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| 492 | |
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| 493 | case 1: |
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| 494 | _state = STATE.TOUCH_ROTATE; |
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| 495 | _rotateEnd.copy( _this.getMouseProjectionOnBall( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY, _rotateStart )); |
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| 496 | break; |
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| 497 | |
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| 498 | case 2: |
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| 499 | _state = STATE.TOUCH_ZOOM; |
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| 500 | var dx = event.touches[ 0 ].pageX - event.touches[ 1 ].pageX; |
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| 501 | var dy = event.touches[ 0 ].pageY - event.touches[ 1 ].pageY; |
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| 502 | _touchZoomDistanceEnd = _touchZoomDistanceStart = Math.sqrt( dx * dx + dy * dy ); |
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| 503 | break; |
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| 504 | |
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| 505 | case 3: |
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| 506 | _state = STATE.TOUCH_PAN; |
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| 507 | _panEnd.copy( _this.getMouseOnScreen( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY, _panStart )); |
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| 508 | break; |
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| 509 | |
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| 510 | default: |
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| 511 | _state = STATE.NONE; |
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| 512 | |
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| 513 | } |
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| 514 | _this.dispatchEvent( startEvent ); |
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| 515 | |
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| 516 | |
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| 517 | } |
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| 518 | |
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| 519 | function touchmove( event ) { |
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| 520 | |
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| 521 | if ( _this.enabled === false ) return; |
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| 522 | |
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| 523 | event.preventDefault(); |
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| 524 | event.stopPropagation(); |
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| 525 | |
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| 526 | switch ( event.touches.length ) { |
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| 527 | |
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| 528 | case 1: |
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| 529 | _this.getMouseProjectionOnBall( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY, _rotateEnd ); |
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| 530 | break; |
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| 531 | |
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| 532 | case 2: |
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| 533 | var dx = event.touches[ 0 ].pageX - event.touches[ 1 ].pageX; |
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| 534 | var dy = event.touches[ 0 ].pageY - event.touches[ 1 ].pageY; |
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| 535 | _touchZoomDistanceEnd = Math.sqrt( dx * dx + dy * dy ) |
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| 536 | break; |
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| 537 | |
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| 538 | case 3: |
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| 539 | _this.getMouseOnScreen( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY, _panEnd ); |
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| 540 | break; |
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| 541 | |
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| 542 | default: |
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| 543 | _state = STATE.NONE; |
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| 544 | |
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| 545 | } |
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| 546 | |
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| 547 | } |
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| 548 | |
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| 549 | function touchend( event ) { |
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| 550 | |
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| 551 | if ( _this.enabled === false ) return; |
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| 552 | |
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| 553 | switch ( event.touches.length ) { |
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| 554 | |
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| 555 | case 1: |
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| 556 | _rotateStart.copy( _this.getMouseProjectionOnBall( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY, _rotateEnd )); |
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| 557 | break; |
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| 558 | |
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| 559 | case 2: |
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| 560 | _touchZoomDistanceStart = _touchZoomDistanceEnd = 0; |
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| 561 | break; |
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| 562 | |
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| 563 | case 3: |
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| 564 | _panStart.copy( _this.getMouseOnScreen( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY, _panEnd )); |
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| 565 | break; |
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| 566 | |
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| 567 | } |
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| 568 | |
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| 569 | _state = STATE.NONE; |
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| 570 | _this.dispatchEvent( endEvent ); |
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| 571 | |
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| 572 | } |
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| 573 | |
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| 574 | this.domElement.addEventListener( 'contextmenu', function ( event ) { event.preventDefault(); }, false ); |
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| 575 | |
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| 576 | this.domElement.addEventListener( 'mousedown', mousedown, false ); |
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| 577 | |
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| 578 | this.domElement.addEventListener( 'mousewheel', mousewheel, false ); |
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| 579 | this.domElement.addEventListener( 'DOMMouseScroll', mousewheel, false ); // firefox |
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| 580 | |
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| 581 | this.domElement.addEventListener( 'touchstart', touchstart, false ); |
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| 582 | this.domElement.addEventListener( 'touchend', touchend, false ); |
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| 583 | this.domElement.addEventListener( 'touchmove', touchmove, false ); |
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| 584 | |
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| 585 | window.addEventListener( 'keydown', keydown, false ); |
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| 586 | window.addEventListener( 'keyup', keyup, false ); |
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| 587 | |
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| 588 | this.handleResize(); |
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| 589 | |
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| 590 | }; |
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| 591 | |
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| 592 | THREE.TrackballControls.prototype = Object.create( THREE.EventDispatcher.prototype ); |
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