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6 | import { Geometry } from '../core/Geometry.js';
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7 | import { BufferGeometry } from '../core/BufferGeometry.js';
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8 | import { Float32BufferAttribute } from '../core/BufferAttribute.js';
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9 |
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10 |
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11 |
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12 | function PlaneGeometry( width, height, widthSegments, heightSegments ) {
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13 |
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14 | Geometry.call( this );
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15 |
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16 | this.type = 'PlaneGeometry';
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17 |
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18 | this.parameters = {
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19 | width: width,
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20 | height: height,
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21 | widthSegments: widthSegments,
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22 | heightSegments: heightSegments
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23 | };
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24 |
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25 | this.fromBufferGeometry( new PlaneBufferGeometry( width, height, widthSegments, heightSegments ) );
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26 | this.mergeVertices();
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27 |
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28 | }
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29 |
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30 | PlaneGeometry.prototype = Object.create( Geometry.prototype );
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31 | PlaneGeometry.prototype.constructor = PlaneGeometry;
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32 |
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33 |
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34 |
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35 | function PlaneBufferGeometry( width, height, widthSegments, heightSegments ) {
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36 |
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37 | BufferGeometry.call( this );
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38 |
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39 | this.type = 'PlaneBufferGeometry';
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40 |
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41 | this.parameters = {
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42 | width: width,
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43 | height: height,
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44 | widthSegments: widthSegments,
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45 | heightSegments: heightSegments
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46 | };
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47 |
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48 | width = width || 1;
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49 | height = height || 1;
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50 |
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51 | var width_half = width / 2;
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52 | var height_half = height / 2;
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53 |
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54 | var gridX = Math.floor( widthSegments ) || 1;
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55 | var gridY = Math.floor( heightSegments ) || 1;
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56 |
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57 | var gridX1 = gridX + 1;
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58 | var gridY1 = gridY + 1;
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59 |
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60 | var segment_width = width / gridX;
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61 | var segment_height = height / gridY;
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62 |
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63 | var ix, iy;
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64 |
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65 |
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66 |
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67 | var indices = [];
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68 | var vertices = [];
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69 | var normals = [];
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70 | var uvs = [];
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71 |
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72 |
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73 |
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74 | for ( iy = 0; iy < gridY1; iy ++ ) {
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75 |
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76 | var y = iy * segment_height - height_half;
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77 |
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78 | for ( ix = 0; ix < gridX1; ix ++ ) {
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79 |
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80 | var x = ix * segment_width - width_half;
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81 |
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82 | vertices.push( x, - y, 0 );
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83 |
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84 | normals.push( 0, 0, 1 );
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85 |
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86 | uvs.push( ix / gridX );
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87 | uvs.push( 1 - ( iy / gridY ) );
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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 |
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93 |
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94 |
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95 | for ( iy = 0; iy < gridY; iy ++ ) {
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96 |
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97 | for ( ix = 0; ix < gridX; ix ++ ) {
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98 |
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99 | var a = ix + gridX1 * iy;
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100 | var b = ix + gridX1 * ( iy + 1 );
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101 | var c = ( ix + 1 ) + gridX1 * ( iy + 1 );
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102 | var d = ( ix + 1 ) + gridX1 * iy;
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103 |
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104 |
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105 |
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106 | indices.push( a, b, d );
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107 | indices.push( b, c, d );
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108 |
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109 | }
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110 |
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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.setIndex( indices );
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116 | this.addAttribute( 'position', new Float32BufferAttribute( vertices, 3 ) );
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117 | this.addAttribute( 'normal', new Float32BufferAttribute( normals, 3 ) );
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118 | this.addAttribute( 'uv', new Float32BufferAttribute( uvs, 2 ) );
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119 |
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120 | }
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121 |
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122 | PlaneBufferGeometry.prototype = Object.create( BufferGeometry.prototype );
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123 | PlaneBufferGeometry.prototype.constructor = PlaneBufferGeometry;
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124 |
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125 |
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126 | export { PlaneGeometry, PlaneBufferGeometry };
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