mirror of
https://github.com/Doodle3D/Doodle3D-Slicer.git
synced 2024-11-17 03:27:57 +01:00
366 lines
8.2 KiB
JavaScript
366 lines
8.2 KiB
JavaScript
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/**
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* Loads a Wavefront .obj file with materials
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*
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* @author mrdoob / http://mrdoob.com/
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* @author angelxuanchang
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*/
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THREE.OBJMTLLoader = function ( manager ) {
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this.manager = ( manager !== undefined ) ? manager : THREE.DefaultLoadingManager;
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};
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THREE.OBJMTLLoader.prototype = {
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constructor: THREE.OBJMTLLoader,
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load: function ( url, mtlurl, onLoad, onProgress, onError ) {
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var scope = this;
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var mtlLoader = new THREE.MTLLoader( url.substr( 0, url.lastIndexOf( "/" ) + 1 ) );
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mtlLoader.crossOrigin = scope.crossOrigin;
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mtlLoader.load( mtlurl, function ( materials ) {
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var materialsCreator = materials;
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materialsCreator.preload();
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var loader = new THREE.XHRLoader( scope.manager );
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loader.setCrossOrigin( scope.crossOrigin );
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loader.load( url, function ( text ) {
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var object = scope.parse( text );
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object.traverse( function ( object ) {
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if ( object instanceof THREE.Mesh ) {
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if ( object.material.name ) {
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var material = materialsCreator.create( object.material.name );
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if ( material ) object.material = material;
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}
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}
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} );
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onLoad( object );
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}, onProgress, onError );
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}, onProgress, onError );
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},
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/**
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* Parses loaded .obj file
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* @param data - content of .obj file
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* @param mtllibCallback - callback to handle mtllib declaration (optional)
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* @return {THREE.Object3D} - Object3D (with default material)
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*/
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parse: function ( data, mtllibCallback ) {
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function vector( x, y, z ) {
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return new THREE.Vector3( x, y, z );
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}
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function uv( u, v ) {
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return new THREE.Vector2( u, 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 face_offset = 0;
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function meshN( meshName, materialName ) {
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if ( vertices.length > 0 ) {
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geometry.vertices = vertices;
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geometry.mergeVertices();
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geometry.computeFaceNormals();
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geometry.computeBoundingSphere();
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object.add( mesh );
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geometry = new THREE.Geometry();
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mesh = new THREE.Mesh( geometry, material );
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}
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if ( meshName !== undefined ) mesh.name = meshName;
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if ( materialName !== undefined ) {
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material = new THREE.MeshLambertMaterial();
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material.name = materialName;
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mesh.material = material;
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}
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}
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var group = new THREE.Group();
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var object = group;
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var geometry = new THREE.Geometry();
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var material = new THREE.MeshLambertMaterial();
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var mesh = new THREE.Mesh( geometry, material );
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var vertices = [];
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var normals = [];
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var uvs = [];
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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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parseInt( a ) - (face_offset + 1),
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parseInt( b ) - (face_offset + 1),
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parseInt( c ) - (face_offset + 1)
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) );
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} else {
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geometry.faces.push( face3(
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parseInt( a ) - (face_offset + 1),
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parseInt( b ) - (face_offset + 1),
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parseInt( c ) - (face_offset + 1),
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[
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normals[ parseInt( normals_inds[ 0 ] ) - 1 ].clone(),
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normals[ parseInt( normals_inds[ 1 ] ) - 1 ].clone(),
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normals[ parseInt( normals_inds[ 2 ] ) - 1 ].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[ parseInt( a ) - 1 ].clone(),
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uvs[ parseInt( b ) - 1 ].clone(),
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uvs[ parseInt( c ) - 1 ].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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// 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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//
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var lines = data.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( vector(
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parseFloat( result[ 1 ] ),
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parseFloat( result[ 2 ] ),
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parseFloat( result[ 3 ] )
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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( vector(
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parseFloat( result[ 1 ] ),
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parseFloat( result[ 2 ] ),
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parseFloat( result[ 3 ] )
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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( uv(
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parseFloat( result[ 1 ] ),
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parseFloat( result[ 2 ] )
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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([ result[ 1 ], result[ 2 ], result[ 3 ], result[ 4 ] ]);
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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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// object
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meshN();
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face_offset = face_offset + vertices.length;
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vertices = [];
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object = new THREE.Object3D();
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object.name = line.substring( 2 ).trim();
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group.add( object );
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} else if ( /^g /.test( line ) ) {
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// group
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meshN( line.substring( 2 ).trim(), undefined );
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} else if ( /^usemtl /.test( line ) ) {
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// material
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meshN( undefined, line.substring( 7 ).trim() );
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} else if ( /^mtllib /.test( line ) ) {
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// mtl file
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if ( mtllibCallback ) {
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var mtlfile = line.substring( 7 );
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mtlfile = mtlfile.trim();
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mtllibCallback( mtlfile );
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}
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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.OBJMTLLoader: Unhandled line " + line );
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}
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}
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//Add last object
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meshN(undefined, undefined);
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return group;
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}
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};
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THREE.EventDispatcher.prototype.apply( THREE.OBJMTLLoader.prototype );
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