topical media & game development
mobile-query-three-vendor-three.js-loaders-OBJLoader.js / js
author: mrdoob / mrdoob.com/
THREE.OBJLoader = function () {
THREE.EventDispatcher.call( this );
};
THREE.OBJLoader.prototype = {
constructor: THREE.OBJLoader,
load: function ( url, callback ) {
var scope = this;
var request = new XMLHttpRequest();
request.addEventListener( 'load', function ( event ) {
var hierarchy = scope.parse( event.target.responseText );
scope.dispatchEvent( { type: 'load', content: hierarchy } );
if ( callback ) callback( hierarchy );
}, false );
request.addEventListener( 'progress', function ( event ) {
scope.dispatchEvent( { type: 'progress', loaded: event.loaded, total: event.total } );
}, false );
request.addEventListener( 'error', function () {
scope.dispatchEvent( { type: 'error', message: 'Couldn\'t load URL [' + url + ']' } );
}, false );
request.open( 'GET', url, true );
request.send( null );
},
parse: function ( data ) {
// fixes
data = data.replace( /\ \\\r\n/g, '' ); // rhino adds ' \\r\n' some times.
//
function vector( x, y, z ) {
return new THREE.Vector3( x, y, z );
}
function uv( u, v ) {
return new THREE.Vector2( u, v );
}
function face3( a, b, c, normals ) {
return new THREE.Face3( a, b, c, normals );
}
function face4( a, b, c, d, normals ) {
return new THREE.Face4( a, b, c, d, normals );
}
function meshN( meshName, materialName ) {
if ( geometry.vertices.length > 0 ) {
geometry.mergeVertices();
geometry.computeCentroids();
geometry.computeFaceNormals();
geometry.computeBoundingSphere();
object.add( mesh );
geometry = new THREE.Geometry();
mesh = new THREE.Mesh( geometry, material );
verticesCount = 0;
}
if ( meshName !== undefined ) mesh.name = meshName;
if ( materialName !== undefined ) {
material = new THREE.MeshLambertMaterial();
material.name = materialName;
mesh.material = material;
}
}
var group = new THREE.Object3D();
var object = group;
var geometry = new THREE.Geometry();
var material = new THREE.MeshLambertMaterial();
var mesh = new THREE.Mesh( geometry, material );
var vertices = [];
var verticesCount = 0;
var normals = [];
var uvs = [];
// v float float float
var vertex_pattern = /v( +[\d|\.|\+|\-|e]+)( [\d|\.|\+|\-|e]+)( [\d|\.|\+|\-|e]+)/;
// vn float float float
var normal_pattern = /vn( +[\d|\.|\+|\-|e]+)( [\d|\.|\+|\-|e]+)( [\d|\.|\+|\-|e]+)/;
// vt float float
var uv_pattern = /vt( +[\d|\.|\+|\-|e]+)( [\d|\.|\+|\-|e]+)/;
// f vertex vertex vertex ...
var face_pattern1 = /f( +[\d]+)( [\d]+)( [\d]+)( [\d]+)?/;
// f vertex/uv vertex/uv vertex/uv ...
var face_pattern2 = /f( +([\d]+)\/([\d]+))( ([\d]+)\/([\d]+))( ([\d]+)\/([\d]+))( ([\d]+)\/([\d]+))?/;
// f vertex/uv/normal vertex/uv/normal vertex/uv/normal ...
var face_pattern3 = /f( +([\d]+)\/([\d]+)\/([\d]+))( ([\d]+)\/([\d]+)\/([\d]+))( ([\d]+)\/([\d]+)\/([\d]+))( ([\d]+)\/([\d]+)\/([\d]+))?/;
// f vertex//normal vertex//normal vertex//normal ...
var face_pattern4 = /f( +([\d]+)\/\/([\d]+))( ([\d]+)\/\/([\d]+))( ([\d]+)\/\/([\d]+))( ([\d]+)\/\/([\d]+))?/;
//
var lines = data.split( "\n" );
for ( var i = 0; i < lines.length; i ++ ) {
var line = lines[ i ];
line = line.trim();
var result;
if ( line.length === 0 || line.charAt( 0 ) === '#' ) {
continue;
} else if ( ( result = vertex_pattern.exec( line ) ) !== null ) {
// ["v 1.0 2.0 3.0", "1.0", "2.0", "3.0"]
vertices.push( vector(
parseFloat( result[ 1 ] ),
parseFloat( result[ 2 ] ),
parseFloat( result[ 3 ] )
) );
} else if ( ( result = normal_pattern.exec( line ) ) !== null ) {
// ["vn 1.0 2.0 3.0", "1.0", "2.0", "3.0"]
normals.push( vector(
parseFloat( result[ 1 ] ),
parseFloat( result[ 2 ] ),
parseFloat( result[ 3 ] )
) );
} else if ( ( result = uv_pattern.exec( line ) ) !== null ) {
// ["vt 0.1 0.2", "0.1", "0.2"]
uvs.push( uv(
parseFloat( result[ 1 ] ),
parseFloat( result[ 2 ] )
) );
} else if ( ( result = face_pattern1.exec( line ) ) !== null ) {
// ["f 1 2 3", "1", "2", "3", undefined]
if ( result[ 4 ] === undefined ) {
geometry.vertices.push(
vertices[ parseInt( result[ 1 ] ) - 1 ],
vertices[ parseInt( result[ 2 ] ) - 1 ],
vertices[ parseInt( result[ 3 ] ) - 1 ]
);
geometry.faces.push( face3(
verticesCount ++,
verticesCount ++,
verticesCount ++
) );
} else {
geometry.vertices.push(
vertices[ parseInt( result[ 1 ] ) - 1 ],
vertices[ parseInt( result[ 2 ] ) - 1 ],
vertices[ parseInt( result[ 3 ] ) - 1 ],
vertices[ parseInt( result[ 4 ] ) - 1 ]
);
geometry.faces.push( face4(
verticesCount ++,
verticesCount ++,
verticesCount ++,
verticesCount ++
) );
}
} else if ( ( result = face_pattern2.exec( line ) ) !== null ) {
// ["f 1/1 2/2 3/3", " 1/1", "1", "1", " 2/2", "2", "2", " 3/3", "3", "3", undefined, undefined, undefined]
if ( result[ 10 ] === undefined ) {
geometry.vertices.push(
vertices[ parseInt( result[ 2 ] ) - 1 ],
vertices[ parseInt( result[ 5 ] ) - 1 ],
vertices[ parseInt( result[ 8 ] ) - 1 ]
);
geometry.faces.push( face3(
verticesCount ++,
verticesCount ++,
verticesCount ++
) );
geometry.faceVertexUvs[ 0 ].push( [
uvs[ parseInt( result[ 3 ] ) - 1 ],
uvs[ parseInt( result[ 6 ] ) - 1 ],
uvs[ parseInt( result[ 9 ] ) - 1 ]
] );
} else {
geometry.vertices.push(
vertices[ parseInt( result[ 2 ] ) - 1 ],
vertices[ parseInt( result[ 5 ] ) - 1 ],
vertices[ parseInt( result[ 8 ] ) - 1 ],
vertices[ parseInt( result[ 11 ] ) - 1 ]
);
geometry.faces.push( face4(
verticesCount ++,
verticesCount ++,
verticesCount ++,
verticesCount ++
) );
geometry.faceVertexUvs[ 0 ].push( [
uvs[ parseInt( result[ 3 ] ) - 1 ],
uvs[ parseInt( result[ 6 ] ) - 1 ],
uvs[ parseInt( result[ 9 ] ) - 1 ],
uvs[ parseInt( result[ 12 ] ) - 1 ]
] );
}
} else if ( ( result = face_pattern3.exec( line ) ) !== null ) {
// ["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]
if ( result[ 13 ] === undefined ) {
geometry.vertices.push(
vertices[ parseInt( result[ 2 ] ) - 1 ],
vertices[ parseInt( result[ 6 ] ) - 1 ],
vertices[ parseInt( result[ 10 ] ) - 1 ]
);
geometry.faces.push( face3(
verticesCount ++,
verticesCount ++,
verticesCount ++,
[
normals[ parseInt( result[ 4 ] ) - 1 ],
normals[ parseInt( result[ 8 ] ) - 1 ],
normals[ parseInt( result[ 12 ] ) - 1 ]
]
) );
geometry.faceVertexUvs[ 0 ].push( [
uvs[ parseInt( result[ 3 ] ) - 1 ],
uvs[ parseInt( result[ 7 ] ) - 1 ],
uvs[ parseInt( result[ 11 ] ) - 1 ]
] );
} else {
geometry.vertices.push(
vertices[ parseInt( result[ 2 ] ) - 1 ],
vertices[ parseInt( result[ 6 ] ) - 1 ],
vertices[ parseInt( result[ 10 ] ) - 1 ],
vertices[ parseInt( result[ 14 ] ) - 1 ]
);
geometry.faces.push( face4(
verticesCount ++,
verticesCount ++,
verticesCount ++,
verticesCount ++,
[
normals[ parseInt( result[ 4 ] ) - 1 ],
normals[ parseInt( result[ 8 ] ) - 1 ],
normals[ parseInt( result[ 12 ] ) - 1 ],
normals[ parseInt( result[ 16 ] ) - 1 ]
]
) );
geometry.faceVertexUvs[ 0 ].push( [
uvs[ parseInt( result[ 3 ] ) - 1 ],
uvs[ parseInt( result[ 7 ] ) - 1 ],
uvs[ parseInt( result[ 11 ] ) - 1 ],
uvs[ parseInt( result[ 15 ] ) - 1 ]
] );
}
} else if ( ( result = face_pattern4.exec( line ) ) !== null ) {
// ["f 1//1 2//2 3//3", " 1//1", "1", "1", " 2//2", "2", "2", " 3//3", "3", "3", undefined, undefined, undefined]
if ( result[ 10 ] === undefined ) {
geometry.vertices.push(
vertices[ parseInt( result[ 2 ] ) - 1 ],
vertices[ parseInt( result[ 5 ] ) - 1 ],
vertices[ parseInt( result[ 8 ] ) - 1 ]
);
geometry.faces.push( face3(
verticesCount ++,
verticesCount ++,
verticesCount ++,
[
normals[ parseInt( result[ 3 ] ) - 1 ],
normals[ parseInt( result[ 6 ] ) - 1 ],
normals[ parseInt( result[ 9 ] ) - 1 ]
]
) );
} else {
geometry.vertices.push(
vertices[ parseInt( result[ 2 ] ) - 1 ],
vertices[ parseInt( result[ 5 ] ) - 1 ],
vertices[ parseInt( result[ 8 ] ) - 1 ],
vertices[ parseInt( result[ 11 ] ) - 1 ]
);
geometry.faces.push( face4(
verticesCount ++,
verticesCount ++,
verticesCount ++,
verticesCount ++,
[
normals[ parseInt( result[ 3 ] ) - 1 ],
normals[ parseInt( result[ 6 ] ) - 1 ],
normals[ parseInt( result[ 9 ] ) - 1 ],
normals[ parseInt( result[ 12 ] ) - 1 ]
]
) );
}
} else if ( /^o /.test( line ) ) {
// object
object = new THREE.Object3D();
object.name = line.substring( 2 ).trim();
group.add( object );
} else if ( /^g /.test( line ) ) {
// group
meshN( line.substring( 2 ).trim(), undefined );
} else if ( /^usemtl /.test( line ) ) {
// material
meshN( undefined, line.substring( 7 ).trim() );
} else if ( /^mtllib /.test( line ) ) {
// mtl file
} else if ( /^s /.test( line ) ) {
// smooth shading
} else {
// console.log( "THREE.OBJLoader: Unhandled line " + line );
}
}
// add the last group
meshN( undefined, undefined );
return group;
}
}
(C) Æliens
04/09/2009
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