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6 |
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7 | import { Geometry } from '../core/Geometry.js';
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8 | import { BufferGeometry } from '../core/BufferGeometry.js';
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9 | import { Float32BufferAttribute } from '../core/BufferAttribute.js';
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10 | import { Vector3 } from '../math/Vector3.js';
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11 |
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12 |
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13 |
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14 | function SphereGeometry( radius, widthSegments, heightSegments, phiStart, phiLength, thetaStart, thetaLength ) {
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15 |
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16 | Geometry.call( this );
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17 |
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18 | this.type = 'SphereGeometry';
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19 |
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20 | this.parameters = {
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21 | radius: radius,
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22 | widthSegments: widthSegments,
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23 | heightSegments: heightSegments,
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24 | phiStart: phiStart,
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25 | phiLength: phiLength,
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26 | thetaStart: thetaStart,
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27 | thetaLength: thetaLength
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28 | };
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29 |
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30 | this.fromBufferGeometry( new SphereBufferGeometry( radius, widthSegments, heightSegments, phiStart, phiLength, thetaStart, thetaLength ) );
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31 | this.mergeVertices();
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32 |
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33 | }
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34 |
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35 | SphereGeometry.prototype = Object.create( Geometry.prototype );
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36 | SphereGeometry.prototype.constructor = SphereGeometry;
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37 |
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38 |
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39 |
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40 | function SphereBufferGeometry( radius, widthSegments, heightSegments, phiStart, phiLength, thetaStart, thetaLength ) {
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41 |
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42 | BufferGeometry.call( this );
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43 |
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44 | this.type = 'SphereBufferGeometry';
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45 |
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46 | this.parameters = {
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47 | radius: radius,
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48 | widthSegments: widthSegments,
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49 | heightSegments: heightSegments,
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50 | phiStart: phiStart,
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51 | phiLength: phiLength,
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52 | thetaStart: thetaStart,
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53 | thetaLength: thetaLength
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54 | };
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55 |
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56 | radius = radius || 1;
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57 |
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58 | widthSegments = Math.max( 3, Math.floor( widthSegments ) || 8 );
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59 | heightSegments = Math.max( 2, Math.floor( heightSegments ) || 6 );
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60 |
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61 | phiStart = phiStart !== undefined ? phiStart : 0;
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62 | phiLength = phiLength !== undefined ? phiLength : Math.PI * 2;
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63 |
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64 | thetaStart = thetaStart !== undefined ? thetaStart : 0;
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65 | thetaLength = thetaLength !== undefined ? thetaLength : Math.PI;
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66 |
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67 | var thetaEnd = thetaStart + thetaLength;
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68 |
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69 | var ix, iy;
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70 |
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71 | var index = 0;
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72 | var grid = [];
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73 |
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74 | var vertex = new Vector3();
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75 | var normal = new Vector3();
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76 |
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77 |
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78 |
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79 | var indices = [];
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80 | var vertices = [];
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81 | var normals = [];
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82 | var uvs = [];
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83 |
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84 |
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85 |
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86 | for ( iy = 0; iy <= heightSegments; iy ++ ) {
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87 |
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88 | var verticesRow = [];
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89 |
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90 | var v = iy / heightSegments;
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91 |
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92 | for ( ix = 0; ix <= widthSegments; ix ++ ) {
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93 |
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94 | var u = ix / widthSegments;
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95 |
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96 |
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97 |
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98 | vertex.x = - radius * Math.cos( phiStart + u * phiLength ) * Math.sin( thetaStart + v * thetaLength );
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99 | vertex.y = radius * Math.cos( thetaStart + v * thetaLength );
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100 | vertex.z = radius * Math.sin( phiStart + u * phiLength ) * Math.sin( thetaStart + v * thetaLength );
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101 |
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102 | vertices.push( vertex.x, vertex.y, vertex.z );
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103 |
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104 |
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105 |
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106 | normal.set( vertex.x, vertex.y, vertex.z ).normalize();
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107 | normals.push( normal.x, normal.y, normal.z );
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108 |
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109 |
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110 |
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111 | uvs.push( u, 1 - v );
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112 |
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113 | verticesRow.push( index ++ );
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114 |
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115 | }
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116 |
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117 | grid.push( verticesRow );
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118 |
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119 | }
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120 |
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121 |
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122 |
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123 | for ( iy = 0; iy < heightSegments; iy ++ ) {
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124 |
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125 | for ( ix = 0; ix < widthSegments; ix ++ ) {
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126 |
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127 | var a = grid[ iy ][ ix + 1 ];
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128 | var b = grid[ iy ][ ix ];
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129 | var c = grid[ iy + 1 ][ ix ];
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130 | var d = grid[ iy + 1 ][ ix + 1 ];
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131 |
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132 | if ( iy !== 0 || thetaStart > 0 ) indices.push( a, b, d );
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133 | if ( iy !== heightSegments - 1 || thetaEnd < Math.PI ) indices.push( b, c, d );
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134 |
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135 | }
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136 |
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137 | }
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138 |
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139 |
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140 |
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141 | this.setIndex( indices );
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142 | this.addAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
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143 | this.addAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );
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144 | this.addAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );
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145 |
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146 | }
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147 |
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148 | SphereBufferGeometry.prototype = Object.create( BufferGeometry.prototype );
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149 | SphereBufferGeometry.prototype.constructor = SphereBufferGeometry;
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150 |
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151 |
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152 | export { SphereGeometry, SphereBufferGeometry };
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