1 | /**
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2 | * @author jonobr1 / http://jonobr1.com
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3 | *
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4 | * Creates a one-sided polygonal geometry from a path shape. Similar to
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5 | * ExtrudeGeometry.
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6 | *
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7 | * parameters = {
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8 | *
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9 | * curveSegments: <int>, // number of points on the curves. NOT USED AT THE MOMENT.
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10 | *
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11 | * material: <int> // material index for front and back faces
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12 | * uvGenerator: <Object> // object that provides UV generator functions
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13 | *
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14 | * }
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15 | **/
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16 |
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17 | THREE.ShapeGeometry = function ( shapes, options ) {
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18 |
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19 | THREE.Geometry.call( this );
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20 |
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21 | if ( shapes instanceof Array === false ) shapes = [ shapes ];
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22 |
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23 | this.shapebb = shapes[ shapes.length - 1 ].getBoundingBox();
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24 |
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25 | this.addShapeList( shapes, options );
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26 |
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27 | this.computeCentroids();
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28 | this.computeFaceNormals();
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29 |
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30 | };
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31 |
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32 | THREE.ShapeGeometry.prototype = Object.create( THREE.Geometry.prototype );
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33 |
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34 | /**
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35 | * Add an array of shapes to THREE.ShapeGeometry.
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36 | */
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37 | THREE.ShapeGeometry.prototype.addShapeList = function ( shapes, options ) {
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38 |
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39 | for ( var i = 0, l = shapes.length; i < l; i++ ) {
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40 |
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41 | this.addShape( shapes[ i ], options );
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42 |
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43 | }
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44 |
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45 | return this;
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46 |
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47 | };
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48 |
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49 | /**
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50 | * Adds a shape to THREE.ShapeGeometry, based on THREE.ExtrudeGeometry.
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51 | */
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52 | THREE.ShapeGeometry.prototype.addShape = function ( shape, options ) {
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53 |
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54 | if ( options === undefined ) options = {};
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55 | var curveSegments = options.curveSegments !== undefined ? options.curveSegments : 12;
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56 |
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57 | var material = options.material;
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58 | var uvgen = options.UVGenerator === undefined ? THREE.ExtrudeGeometry.WorldUVGenerator : options.UVGenerator;
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59 |
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60 | var shapebb = this.shapebb;
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61 |
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62 | //
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63 |
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64 | var i, l, hole, s;
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65 |
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66 | var shapesOffset = this.vertices.length;
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67 | var shapePoints = shape.extractPoints( curveSegments );
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68 |
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69 | var vertices = shapePoints.shape;
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70 | var holes = shapePoints.holes;
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71 |
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72 | var reverse = !THREE.Shape.Utils.isClockWise( vertices );
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73 |
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74 | if ( reverse ) {
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75 |
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76 | vertices = vertices.reverse();
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77 |
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78 | // Maybe we should also check if holes are in the opposite direction, just to be safe...
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79 |
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80 | for ( i = 0, l = holes.length; i < l; i++ ) {
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81 |
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82 | hole = holes[ i ];
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83 |
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84 | if ( THREE.Shape.Utils.isClockWise( hole ) ) {
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85 |
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86 | holes[ i ] = hole.reverse();
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87 |
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88 | }
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89 |
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90 | }
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91 |
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92 | reverse = false;
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93 |
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94 | }
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95 |
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96 | var faces = THREE.Shape.Utils.triangulateShape( vertices, holes );
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97 |
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98 | // Vertices
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99 |
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100 | var contour = vertices;
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101 |
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102 | for ( i = 0, l = holes.length; i < l; i++ ) {
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103 |
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104 | hole = holes[ i ];
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105 | vertices = vertices.concat( hole );
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106 |
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107 | }
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108 |
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109 | //
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110 |
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111 | var vert, vlen = vertices.length;
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112 | var face, flen = faces.length;
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113 | var cont, clen = contour.length;
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114 |
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115 | for ( i = 0; i < vlen; i++ ) {
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116 |
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117 | vert = vertices[ i ];
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118 |
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119 | this.vertices.push( new THREE.Vector3( vert.x, vert.y, 0 ) );
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120 |
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121 | }
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122 |
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123 | for ( i = 0; i < flen; i++ ) {
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124 |
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125 | face = faces[ i ];
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126 |
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127 | var a = face[ 0 ] + shapesOffset;
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128 | var b = face[ 1 ] + shapesOffset;
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129 | var c = face[ 2 ] + shapesOffset;
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130 |
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131 | this.faces.push( new THREE.Face3( a, b, c, null, null, material ) );
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132 | this.faceVertexUvs[ 0 ].push( uvgen.generateBottomUV( this, shape, options, a, b, c ) );
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133 |
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134 | }
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135 |
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136 | };
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