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6 |
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7 | THREE.CSS3DObject = function ( element ) {
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8 |
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9 | THREE.Object3D.call( this );
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10 |
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11 | this.element = element;
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12 | this.element.style.position = 'absolute';
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13 | this.element.style.pointerEvents = 'auto';
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14 |
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15 | this.addEventListener( 'removed', function () {
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16 |
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17 | this.traverse( function ( object ) {
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18 |
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19 | if ( object.element instanceof Element && object.element.parentNode !== null ) {
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20 |
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21 | object.element.parentNode.removeChild( object.element );
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22 |
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23 | }
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24 |
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25 | } );
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26 |
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27 | } );
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28 |
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29 | };
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30 |
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31 | THREE.CSS3DObject.prototype = Object.create( THREE.Object3D.prototype );
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32 | THREE.CSS3DObject.prototype.constructor = THREE.CSS3DObject;
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33 |
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34 | THREE.CSS3DSprite = function ( element ) {
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35 |
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36 | THREE.CSS3DObject.call( this, element );
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37 |
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38 | };
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39 |
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40 | THREE.CSS3DSprite.prototype = Object.create( THREE.CSS3DObject.prototype );
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41 | THREE.CSS3DSprite.prototype.constructor = THREE.CSS3DSprite;
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42 |
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43 |
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44 |
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45 | THREE.CSS3DRenderer = function () {
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46 |
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47 | var _width, _height;
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48 | var _widthHalf, _heightHalf;
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49 |
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50 | var matrix = new THREE.Matrix4();
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51 |
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52 | var cache = {
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53 | camera: { fov: 0, style: '' },
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54 | objects: new WeakMap()
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55 | };
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56 |
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57 | var domElement = document.createElement( 'div' );
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58 | domElement.style.overflow = 'hidden';
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59 |
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60 | this.domElement = domElement;
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61 |
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62 | var cameraElement = document.createElement( 'div' );
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63 |
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64 | cameraElement.style.WebkitTransformStyle = 'preserve-3d';
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65 | cameraElement.style.transformStyle = 'preserve-3d';
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66 | cameraElement.style.pointerEvents = 'none';
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67 |
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68 | domElement.appendChild( cameraElement );
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69 |
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70 | var isIE = /Trident/i.test( navigator.userAgent );
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71 |
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72 | this.getSize = function () {
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73 |
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74 | return {
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75 | width: _width,
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76 | height: _height
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77 | };
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78 |
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79 | };
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80 |
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81 | this.setSize = function ( width, height ) {
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82 |
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83 | _width = width;
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84 | _height = height;
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85 | _widthHalf = _width / 2;
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86 | _heightHalf = _height / 2;
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87 |
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88 | domElement.style.width = width + 'px';
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89 | domElement.style.height = height + 'px';
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90 |
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91 | cameraElement.style.width = width + 'px';
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92 | cameraElement.style.height = height + 'px';
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93 |
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94 | };
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95 |
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96 | function epsilon( value ) {
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97 |
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98 | return Math.abs( value ) < 1e-10 ? 0 : value;
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99 |
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100 | }
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101 |
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102 | function getCameraCSSMatrix( matrix ) {
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103 |
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104 | var elements = matrix.elements;
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105 |
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106 | return 'matrix3d(' +
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107 | epsilon( elements[ 0 ] ) + ',' +
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108 | epsilon( - elements[ 1 ] ) + ',' +
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109 | epsilon( elements[ 2 ] ) + ',' +
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110 | epsilon( elements[ 3 ] ) + ',' +
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111 | epsilon( elements[ 4 ] ) + ',' +
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112 | epsilon( - elements[ 5 ] ) + ',' +
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113 | epsilon( elements[ 6 ] ) + ',' +
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114 | epsilon( elements[ 7 ] ) + ',' +
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115 | epsilon( elements[ 8 ] ) + ',' +
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116 | epsilon( - elements[ 9 ] ) + ',' +
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117 | epsilon( elements[ 10 ] ) + ',' +
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118 | epsilon( elements[ 11 ] ) + ',' +
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119 | epsilon( elements[ 12 ] ) + ',' +
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120 | epsilon( - elements[ 13 ] ) + ',' +
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121 | epsilon( elements[ 14 ] ) + ',' +
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122 | epsilon( elements[ 15 ] ) +
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123 | ')';
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124 |
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125 | }
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126 |
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127 | function getObjectCSSMatrix( matrix, cameraCSSMatrix ) {
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128 |
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129 | var elements = matrix.elements;
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130 | var matrix3d = 'matrix3d(' +
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131 | epsilon( elements[ 0 ] ) + ',' +
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132 | epsilon( elements[ 1 ] ) + ',' +
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133 | epsilon( elements[ 2 ] ) + ',' +
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134 | epsilon( elements[ 3 ] ) + ',' +
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135 | epsilon( - elements[ 4 ] ) + ',' +
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136 | epsilon( - elements[ 5 ] ) + ',' +
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137 | epsilon( - elements[ 6 ] ) + ',' +
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138 | epsilon( - elements[ 7 ] ) + ',' +
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139 | epsilon( elements[ 8 ] ) + ',' +
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140 | epsilon( elements[ 9 ] ) + ',' +
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141 | epsilon( elements[ 10 ] ) + ',' +
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142 | epsilon( elements[ 11 ] ) + ',' +
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143 | epsilon( elements[ 12 ] ) + ',' +
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144 | epsilon( elements[ 13 ] ) + ',' +
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145 | epsilon( elements[ 14 ] ) + ',' +
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146 | epsilon( elements[ 15 ] ) +
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147 | ')';
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148 |
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149 | if ( isIE ) {
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150 |
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151 | return 'translate(-50%,-50%)' +
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152 | 'translate(' + _widthHalf + 'px,' + _heightHalf + 'px)' +
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153 | cameraCSSMatrix +
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154 | matrix3d;
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155 |
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156 | }
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157 |
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158 | return 'translate(-50%,-50%)' + matrix3d;
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159 |
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160 | }
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161 |
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162 | function renderObject( object, camera, cameraCSSMatrix ) {
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163 |
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164 | if ( object instanceof THREE.CSS3DObject ) {
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165 |
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166 | var style;
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167 |
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168 | if ( object instanceof THREE.CSS3DSprite ) {
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169 |
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170 |
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171 |
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172 | matrix.copy( camera.matrixWorldInverse );
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173 | matrix.transpose();
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174 | matrix.copyPosition( object.matrixWorld );
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175 | matrix.scale( object.scale );
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176 |
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177 | matrix.elements[ 3 ] = 0;
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178 | matrix.elements[ 7 ] = 0;
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179 | matrix.elements[ 11 ] = 0;
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180 | matrix.elements[ 15 ] = 1;
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181 |
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182 | style = getObjectCSSMatrix( matrix, cameraCSSMatrix );
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183 |
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184 | } else {
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185 |
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186 | style = getObjectCSSMatrix( object.matrixWorld, cameraCSSMatrix );
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187 |
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188 | }
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189 |
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190 | var element = object.element;
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191 | var cachedObject = cache.objects.get( object );
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192 |
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193 | if ( cachedObject === undefined || cachedObject.style !== style ) {
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194 |
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195 | element.style.WebkitTransform = style;
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196 | element.style.transform = style;
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197 |
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198 | var objectData = { style: style };
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199 |
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200 | if ( isIE ) {
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201 |
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202 | objectData.distanceToCameraSquared = getDistanceToSquared( camera, object );
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203 |
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204 | }
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205 |
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206 | cache.objects.set( object, objectData );
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207 |
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208 | }
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209 |
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210 | if ( element.parentNode !== cameraElement ) {
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211 |
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212 | cameraElement.appendChild( element );
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213 |
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214 | }
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215 |
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216 | }
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217 |
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218 | for ( var i = 0, l = object.children.length; i < l; i ++ ) {
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219 |
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220 | renderObject( object.children[ i ], camera, cameraCSSMatrix );
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221 |
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222 | }
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223 |
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224 | }
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225 |
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226 | var getDistanceToSquared = function () {
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227 |
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228 | var a = new THREE.Vector3();
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229 | var b = new THREE.Vector3();
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230 |
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231 | return function ( object1, object2 ) {
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232 |
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233 | a.setFromMatrixPosition( object1.matrixWorld );
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234 | b.setFromMatrixPosition( object2.matrixWorld );
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235 |
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236 | return a.distanceToSquared( b );
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237 |
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238 | };
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239 |
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240 | }();
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241 |
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242 | function filterAndFlatten( scene ) {
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243 |
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244 | var result = [];
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245 |
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246 | scene.traverse( function ( object ) {
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247 |
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248 | if ( object instanceof THREE.CSS3DObject ) result.push( object );
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249 |
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250 | } );
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251 |
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252 | return result;
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253 |
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254 | }
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255 |
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256 | function zOrder( scene ) {
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257 |
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258 | var sorted = filterAndFlatten( scene ).sort( function ( a, b ) {
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259 |
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260 | var distanceA = cache.objects.get( a ).distanceToCameraSquared;
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261 | var distanceB = cache.objects.get( b ).distanceToCameraSquared;
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262 |
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263 | return distanceA - distanceB;
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264 |
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265 | } );
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266 |
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267 | var zMax = sorted.length;
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268 |
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269 | for ( var i = 0, l = sorted.length; i < l; i ++ ) {
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270 |
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271 | sorted[ i ].element.style.zIndex = zMax - i;
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272 |
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273 | }
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274 |
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275 | }
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276 |
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277 | this.render = function ( scene, camera ) {
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278 |
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279 | var fov = camera.projectionMatrix.elements[ 5 ] * _heightHalf;
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280 |
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281 | if ( cache.camera.fov !== fov ) {
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282 |
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283 | if ( camera.isPerspectiveCamera ) {
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284 |
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285 | domElement.style.WebkitPerspective = fov + 'px';
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286 | domElement.style.perspective = fov + 'px';
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287 |
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288 | } else {
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289 |
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290 | domElement.style.WebkitPerspective = '';
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291 | domElement.style.perspective = '';
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292 |
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293 | }
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294 |
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295 | cache.camera.fov = fov;
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296 |
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297 | }
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298 |
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299 | if ( scene.autoUpdate === true ) scene.updateMatrixWorld();
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300 | if ( camera.parent === null ) camera.updateMatrixWorld();
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301 |
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302 | if ( camera.isOrthographicCamera ) {
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303 |
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304 | var tx = - ( camera.right + camera.left ) / 2;
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305 | var ty = ( camera.top + camera.bottom ) / 2;
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306 |
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307 | }
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308 |
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309 | var cameraCSSMatrix = camera.isOrthographicCamera ?
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310 | 'scale(' + fov + ')' + 'translate(' + epsilon( tx ) + 'px,' + epsilon( ty ) + 'px)' + getCameraCSSMatrix( camera.matrixWorldInverse ) :
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311 | 'translateZ(' + fov + 'px)' + getCameraCSSMatrix( camera.matrixWorldInverse );
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312 |
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313 | var style = cameraCSSMatrix +
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314 | 'translate(' + _widthHalf + 'px,' + _heightHalf + 'px)';
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315 |
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316 | if ( cache.camera.style !== style && ! isIE ) {
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317 |
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318 | cameraElement.style.WebkitTransform = style;
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319 | cameraElement.style.transform = style;
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320 |
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321 | cache.camera.style = style;
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322 |
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323 | }
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324 |
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325 | renderObject( scene, camera, cameraCSSMatrix );
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326 |
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327 | if ( isIE ) {
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328 |
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329 |
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330 |
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331 |
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332 |
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333 | zOrder( scene );
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334 |
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335 | }
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336 |
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337 | };
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338 |
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339 | };
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