[28897] | 1 | /**
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| 2 | * @author mrdoob / http://mrdoob.com/
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| 3 | * @author WestLangley / http://github.com/WestLangley
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| 4 | */
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| 5 |
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| 6 | THREE.VertexTangentsHelper = function ( object, size, hex, linewidth ) {
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| 7 |
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| 8 | this.object = object;
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| 9 |
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| 10 | this.size = ( size !== undefined ) ? size : 1;
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| 11 |
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| 12 | var color = ( hex !== undefined ) ? hex : 0x0000ff;
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| 13 |
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| 14 | var width = ( linewidth !== undefined ) ? linewidth : 1;
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| 15 |
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| 16 | var geometry = new THREE.Geometry();
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| 17 |
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| 18 | var vertices = object.geometry.vertices;
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| 19 |
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| 20 | var faces = object.geometry.faces;
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| 21 |
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| 22 | for ( var i = 0, l = faces.length; i < l; i ++ ) {
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| 23 |
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| 24 | var face = faces[ i ];
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| 25 |
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| 26 | for ( var j = 0, jl = face.vertexTangents.length; j < jl; j ++ ) {
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| 27 |
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| 28 | geometry.vertices.push( new THREE.Vector3() );
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| 29 | geometry.vertices.push( new THREE.Vector3() );
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| 30 |
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| 31 | }
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| 32 |
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| 33 | }
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| 34 |
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| 35 | THREE.Line.call( this, geometry, new THREE.LineBasicMaterial( { color: color, linewidth: width } ), THREE.LinePieces );
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| 36 |
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| 37 | this.matrixAutoUpdate = false;
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| 38 |
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| 39 | this.update();
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| 40 |
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| 41 | };
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| 42 |
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| 43 | THREE.VertexTangentsHelper.prototype = Object.create( THREE.Line.prototype );
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| 44 |
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| 45 | THREE.VertexTangentsHelper.prototype.update = ( function ( object ) {
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| 46 |
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| 47 | var v1 = new THREE.Vector3();
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| 48 |
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| 49 | return function( object ) {
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| 50 |
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| 51 | var keys = [ 'a', 'b', 'c', 'd' ];
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| 52 |
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| 53 | this.object.updateMatrixWorld( true );
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| 54 |
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| 55 | var vertices = this.geometry.vertices;
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| 56 |
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| 57 | var verts = this.object.geometry.vertices;
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| 58 |
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| 59 | var faces = this.object.geometry.faces;
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| 60 |
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| 61 | var worldMatrix = this.object.matrixWorld;
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| 62 |
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| 63 | var idx = 0;
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| 64 |
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| 65 | for ( var i = 0, l = faces.length; i < l; i ++ ) {
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| 66 |
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| 67 | var face = faces[ i ];
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| 68 |
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| 69 | for ( var j = 0, jl = face.vertexTangents.length; j < jl; j ++ ) {
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| 70 |
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| 71 | var vertexId = face[ keys[ j ] ];
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| 72 | var vertex = verts[ vertexId ];
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| 73 |
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| 74 | var tangent = face.vertexTangents[ j ];
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| 75 |
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| 76 | vertices[ idx ].copy( vertex ).applyMatrix4( worldMatrix );
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| 77 |
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| 78 | v1.copy( tangent ).transformDirection( worldMatrix ).multiplyScalar( this.size );
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| 79 |
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| 80 | v1.add( vertices[ idx ] );
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| 81 | idx = idx + 1;
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| 82 |
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| 83 | vertices[ idx ].copy( v1 );
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| 84 | idx = idx + 1;
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| 85 |
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| 86 | }
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| 87 |
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| 88 | }
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| 89 |
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| 90 | this.geometry.verticesNeedUpdate = true;
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| 91 |
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| 92 | return this;
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| 93 |
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| 94 | }
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| 95 |
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| 96 | }());
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