330 lines
7.3 KiB
JavaScript
330 lines
7.3 KiB
JavaScript
/**
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* @author mrdoob / http://mrdoob.com/
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*/
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THREE.OBJLoader = function ( manager ) {
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this.manager = ( manager !== undefined ) ? manager : THREE.DefaultLoadingManager;
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};
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THREE.OBJLoader.prototype = {
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constructor: THREE.OBJLoader,
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load: function ( url, onLoad, onProgress, onError ) {
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var scope = this;
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var loader = new THREE.XHRLoader( scope.manager );
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loader.setCrossOrigin( this.crossOrigin );
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loader.load( url, function ( text ) {
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onLoad( scope.parse( text ) );
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} );
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},
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parse: function ( text ) {
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function vector( x, y, z ) {
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return new THREE.Vector3( parseFloat( x ), parseFloat( y ), parseFloat( z ) );
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}
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function uv( u, v ) {
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return new THREE.Vector2( parseFloat( u ), parseFloat( v ) );
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}
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function face3( a, b, c, normals ) {
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return new THREE.Face3( a, b, c, normals );
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}
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var object = new THREE.Object3D();
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var geometry, material, mesh;
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function parseVertexIndex( index ) {
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index = parseInt( index );
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return index >= 0 ? index - 1 : index + vertices.length;
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}
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function parseNormalIndex( index ) {
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index = parseInt( index );
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return index >= 0 ? index - 1 : index + normals.length;
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}
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function parseUVIndex( index ) {
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index = parseInt( index );
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return index >= 0 ? index - 1 : index + uvs.length;
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}
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function add_face( a, b, c, normals_inds ) {
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if ( normals_inds === undefined ) {
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geometry.faces.push( face3(
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vertices[ parseVertexIndex( a ) ] - 1,
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vertices[ parseVertexIndex( b ) ] - 1,
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vertices[ parseVertexIndex( c ) ] - 1
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) );
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} else {
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geometry.faces.push( face3(
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vertices[ parseVertexIndex( a ) ] - 1,
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vertices[ parseVertexIndex( b ) ] - 1,
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vertices[ parseVertexIndex( c ) ] - 1,
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[
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normals[ parseNormalIndex( normals_inds[ 0 ] ) ].clone(),
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normals[ parseNormalIndex( normals_inds[ 1 ] ) ].clone(),
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normals[ parseNormalIndex( normals_inds[ 2 ] ) ].clone()
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]
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) );
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}
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}
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function add_uvs( a, b, c ) {
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geometry.faceVertexUvs[ 0 ].push( [
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uvs[ parseUVIndex( a ) ].clone(),
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uvs[ parseUVIndex( b ) ].clone(),
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uvs[ parseUVIndex( c ) ].clone()
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] );
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}
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function handle_face_line(faces, uvs, normals_inds) {
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if ( faces[ 3 ] === undefined ) {
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add_face( faces[ 0 ], faces[ 1 ], faces[ 2 ], normals_inds );
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if ( uvs !== undefined && uvs.length > 0 ) {
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add_uvs( uvs[ 0 ], uvs[ 1 ], uvs[ 2 ] );
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}
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} else {
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if ( normals_inds !== undefined && normals_inds.length > 0 ) {
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add_face( faces[ 0 ], faces[ 1 ], faces[ 3 ], [ normals_inds[ 0 ], normals_inds[ 1 ], normals_inds[ 3 ] ] );
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add_face( faces[ 1 ], faces[ 2 ], faces[ 3 ], [ normals_inds[ 1 ], normals_inds[ 2 ], normals_inds[ 3 ] ] );
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} else {
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add_face( faces[ 0 ], faces[ 1 ], faces[ 3 ] );
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add_face( faces[ 1 ], faces[ 2 ], faces[ 3 ] );
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}
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if ( uvs !== undefined && uvs.length > 0 ) {
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add_uvs( uvs[ 0 ], uvs[ 1 ], uvs[ 3 ] );
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add_uvs( uvs[ 1 ], uvs[ 2 ], uvs[ 3 ] );
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}
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}
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}
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// create mesh if no objects in text
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if ( /^o /gm.test( text ) === false ) {
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geometry = new THREE.Geometry();
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material = new THREE.MeshLambertMaterial();
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mesh = new THREE.Mesh( geometry, material );
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object.add( mesh );
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}
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var vertices = [];
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var normals = [];
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var uvs = [];
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// v float float float
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var vertex_pattern = /v( +[\d|\.|\+|\-|e]+)( +[\d|\.|\+|\-|e]+)( +[\d|\.|\+|\-|e]+)/;
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// vn float float float
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var normal_pattern = /vn( +[\d|\.|\+|\-|e]+)( +[\d|\.|\+|\-|e]+)( +[\d|\.|\+|\-|e]+)/;
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// vt float float
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var uv_pattern = /vt( +[\d|\.|\+|\-|e]+)( +[\d|\.|\+|\-|e]+)/;
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// f vertex vertex vertex ...
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var face_pattern1 = /f( +-?\d+)( +-?\d+)( +-?\d+)( +-?\d+)?/;
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// f vertex/uv vertex/uv vertex/uv ...
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var face_pattern2 = /f( +(-?\d+)\/(-?\d+))( +(-?\d+)\/(-?\d+))( +(-?\d+)\/(-?\d+))( +(-?\d+)\/(-?\d+))?/;
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// f vertex/uv/normal vertex/uv/normal vertex/uv/normal ...
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var face_pattern3 = /f( +(-?\d+)\/(-?\d+)\/(-?\d+))( +(-?\d+)\/(-?\d+)\/(-?\d+))( +(-?\d+)\/(-?\d+)\/(-?\d+))( +(-?\d+)\/(-?\d+)\/(-?\d+))?/;
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// f vertex//normal vertex//normal vertex//normal ...
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var face_pattern4 = /f( +(-?\d+)\/\/(-?\d+))( +(-?\d+)\/\/(-?\d+))( +(-?\d+)\/\/(-?\d+))( +(-?\d+)\/\/(-?\d+))?/
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// fixes
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text = text.replace( /\\\r?\n/g, '' ); // handles line continuations \
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var lines = text.split( '\n' );
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for ( var i = 0; i < lines.length; i ++ ) {
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var line = lines[ i ];
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line = line.trim();
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var result;
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if ( line.length === 0 || line.charAt( 0 ) === '#' ) {
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continue;
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} else if ( ( result = vertex_pattern.exec( line ) ) !== null ) {
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// ["v 1.0 2.0 3.0", "1.0", "2.0", "3.0"]
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vertices.push(
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geometry.vertices.push(
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vector(
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result[ 1 ], result[ 2 ], result[ 3 ]
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)
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)
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);
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} else if ( ( result = normal_pattern.exec( line ) ) !== null ) {
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// ["vn 1.0 2.0 3.0", "1.0", "2.0", "3.0"]
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normals.push(
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vector(
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result[ 1 ], result[ 2 ], result[ 3 ]
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)
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);
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} else if ( ( result = uv_pattern.exec( line ) ) !== null ) {
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// ["vt 0.1 0.2", "0.1", "0.2"]
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uvs.push(
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uv(
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result[ 1 ], result[ 2 ]
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)
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);
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} else if ( ( result = face_pattern1.exec( line ) ) !== null ) {
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// ["f 1 2 3", "1", "2", "3", undefined]
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handle_face_line(
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[ result[ 1 ], result[ 2 ], result[ 3 ], result[ 4 ] ]
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);
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} else if ( ( result = face_pattern2.exec( line ) ) !== null ) {
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// ["f 1/1 2/2 3/3", " 1/1", "1", "1", " 2/2", "2", "2", " 3/3", "3", "3", undefined, undefined, undefined]
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handle_face_line(
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[ result[ 2 ], result[ 5 ], result[ 8 ], result[ 11 ] ], //faces
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[ result[ 3 ], result[ 6 ], result[ 9 ], result[ 12 ] ] //uv
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);
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} else if ( ( result = face_pattern3.exec( line ) ) !== null ) {
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// ["f 1/1/1 2/2/2 3/3/3", " 1/1/1", "1", "1", "1", " 2/2/2", "2", "2", "2", " 3/3/3", "3", "3", "3", undefined, undefined, undefined, undefined]
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handle_face_line(
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[ result[ 2 ], result[ 6 ], result[ 10 ], result[ 14 ] ], //faces
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[ result[ 3 ], result[ 7 ], result[ 11 ], result[ 15 ] ], //uv
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[ result[ 4 ], result[ 8 ], result[ 12 ], result[ 16 ] ] //normal
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);
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} else if ( ( result = face_pattern4.exec( line ) ) !== null ) {
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// ["f 1//1 2//2 3//3", " 1//1", "1", "1", " 2//2", "2", "2", " 3//3", "3", "3", undefined, undefined, undefined]
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handle_face_line(
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[ result[ 2 ], result[ 5 ], result[ 8 ], result[ 11 ] ], //faces
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[ ], //uv
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[ result[ 3 ], result[ 6 ], result[ 9 ], result[ 12 ] ] //normal
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);
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} else if ( /^o /.test( line ) ) {
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geometry = new THREE.Geometry();
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material = new THREE.MeshLambertMaterial();
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mesh = new THREE.Mesh( geometry, material );
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mesh.name = line.substring( 2 ).trim();
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object.add( mesh );
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} else if ( /^g /.test( line ) ) {
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// group
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} else if ( /^usemtl /.test( line ) ) {
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// material
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material.name = line.substring( 7 ).trim();
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} else if ( /^mtllib /.test( line ) ) {
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// mtl file
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} else if ( /^s /.test( line ) ) {
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// smooth shading
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} else {
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// console.log( "THREE.OBJLoader: Unhandled line " + line );
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}
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}
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var children = object.children;
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for ( var i = 0, l = children.length; i < l; i ++ ) {
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var geometry = children[ i ].geometry;
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geometry.computeFaceNormals();
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geometry.computeBoundingSphere();
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}
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return object;
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}
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};
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