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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