| 1 | /**
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| 2 | * @author oosmoxiecode
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| 3 | * @author mrdoob / http://mrdoob.com/
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| 4 | * based on http://code.google.com/p/away3d/source/browse/trunk/fp10/Away3DLite/src/away3dlite/primitives/Torus.as?r=2888
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| 5 | */
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| 6 |
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| 7 | THREE.TorusGeometry = function ( radius, tube, radialSegments, tubularSegments, arc ) {
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| 8 |
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| 9 | THREE.Geometry.call( this );
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| 10 |
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| 11 | var scope = this;
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| 12 |
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| 13 | this.radius = radius || 100;
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| 14 | this.tube = tube || 40;
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| 15 | this.radialSegments = radialSegments || 8;
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| 16 | this.tubularSegments = tubularSegments || 6;
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| 17 | this.arc = arc || Math.PI * 2;
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| 18 |
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| 19 | var center = new THREE.Vector3(), uvs = [], normals = [];
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| 20 |
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| 21 | for ( var j = 0; j <= this.radialSegments; j ++ ) {
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| 22 |
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| 23 | for ( var i = 0; i <= this.tubularSegments; i ++ ) {
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| 24 |
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| 25 | var u = i / this.tubularSegments * this.arc;
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| 26 | var v = j / this.radialSegments * Math.PI * 2;
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| 27 |
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| 28 | center.x = this.radius * Math.cos( u );
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| 29 | center.y = this.radius * Math.sin( u );
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| 30 |
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| 31 | var vertex = new THREE.Vector3();
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| 32 | vertex.x = ( this.radius + this.tube * Math.cos( v ) ) * Math.cos( u );
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| 33 | vertex.y = ( this.radius + this.tube * Math.cos( v ) ) * Math.sin( u );
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| 34 | vertex.z = this.tube * Math.sin( v );
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| 35 |
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| 36 | this.vertices.push( vertex );
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| 37 |
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| 38 | uvs.push( new THREE.Vector2( i / this.tubularSegments, j / this.radialSegments ) );
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| 39 | normals.push( vertex.clone().sub( center ).normalize() );
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| 40 |
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| 41 | }
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| 42 |
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| 43 | }
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| 44 |
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| 45 |
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| 46 | for ( var j = 1; j <= this.radialSegments; j ++ ) {
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| 47 |
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| 48 | for ( var i = 1; i <= this.tubularSegments; i ++ ) {
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| 49 |
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| 50 | var a = ( this.tubularSegments + 1 ) * j + i - 1;
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| 51 | var b = ( this.tubularSegments + 1 ) * ( j - 1 ) + i - 1;
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| 52 | var c = ( this.tubularSegments + 1 ) * ( j - 1 ) + i;
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| 53 | var d = ( this.tubularSegments + 1 ) * j + i;
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| 54 |
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| 55 | var face = new THREE.Face3( a, b, d, [ normals[ a ].clone(), normals[ b ].clone(), normals[ d ].clone() ] );
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| 56 | this.faces.push( face );
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| 57 | this.faceVertexUvs[ 0 ].push( [ uvs[ a ].clone(), uvs[ b ].clone(), uvs[ d ].clone() ] );
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| 58 |
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| 59 | face = new THREE.Face3( b, c, d, [ normals[ b ].clone(), normals[ c ].clone(), normals[ d ].clone() ] );
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| 60 | this.faces.push( face );
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| 61 | this.faceVertexUvs[ 0 ].push( [ uvs[ b ].clone(), uvs[ c ].clone(), uvs[ d ].clone() ] );
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| 62 |
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| 63 | }
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| 64 |
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| 65 | }
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| 66 |
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| 67 | this.computeCentroids();
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| 68 | this.computeFaceNormals();
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| 69 |
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| 70 | };
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| 71 |
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| 72 | THREE.TorusGeometry.prototype = Object.create( THREE.Geometry.prototype );
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