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OBJLoader.js
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OBJLoader.js
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/**
* @author mrdoob / http://mrdoob.com/
*/
THREE.OBJLoader = function ( manager ) {
this.manager = ( manager !== undefined ) ? manager : THREE.DefaultLoadingManager;
};
THREE.OBJLoader.prototype = {
constructor: THREE.OBJLoader,
load: function ( url, onLoad, onProgress, onError ) {
var scope = this;
var loader = new THREE.XHRLoader( scope.manager );
loader.setCrossOrigin( this.crossOrigin );
loader.load( url, function ( text ) {
onLoad( scope.parse( text ) );
}, onProgress, onError );
},
parse: function ( text ) {
console.time( 'OBJLoader' );
var object, objects = [];
var geometry, material;
function parseVertexIndex( value ) {
var index = parseInt( value );
return ( index >= 0 ? index - 1 : index + vertices.length / 3 ) * 3;
}
function parseNormalIndex( value ) {
var index = parseInt( value );
return ( index >= 0 ? index - 1 : index + normals.length / 3 ) * 3;
}
function parseUVIndex( value ) {
var index = parseInt( value );
return ( index >= 0 ? index - 1 : index + uvs.length / 2 ) * 2;
}
function addVertex( a, b, c ) {
geometry.vertices.push(
vertices[ a ], vertices[ a + 1 ], vertices[ a + 2 ],
vertices[ b ], vertices[ b + 1 ], vertices[ b + 2 ],
vertices[ c ], vertices[ c + 1 ], vertices[ c + 2 ]
);
}
function addNormal( a, b, c ) {
geometry.normals.push(
normals[ a ], normals[ a + 1 ], normals[ a + 2 ],
normals[ b ], normals[ b + 1 ], normals[ b + 2 ],
normals[ c ], normals[ c + 1 ], normals[ c + 2 ]
);
}
function addUV( a, b, c ) {
geometry.uvs.push(
uvs[ a ], uvs[ a + 1 ],
uvs[ b ], uvs[ b + 1 ],
uvs[ c ], uvs[ c + 1 ]
);
}
function addFace( a, b, c, d, ua, ub, uc, ud, na, nb, nc, nd ) {
var ia = parseVertexIndex( a );
var ib = parseVertexIndex( b );
var ic = parseVertexIndex( c );
var id;
if ( d === undefined ) {
addVertex( ia, ib, ic );
} else {
id = parseVertexIndex( d );
addVertex( ia, ib, id );
addVertex( ib, ic, id );
}
if ( ua !== undefined ) {
ia = parseUVIndex( ua );
ib = parseUVIndex( ub );
ic = parseUVIndex( uc );
if ( d === undefined ) {
addUV( ia, ib, ic );
} else {
id = parseUVIndex( ud );
addUV( ia, ib, id );
addUV( ib, ic, id );
}
}
if ( na !== undefined ) {
ia = parseNormalIndex( na );
ib = parseNormalIndex( nb );
ic = parseNormalIndex( nc );
if ( d === undefined ) {
addNormal( ia, ib, ic );
} else {
id = parseNormalIndex( nd );
addNormal( ia, ib, id );
addNormal( ib, ic, id );
}
}
}
// create mesh if no objects in text
if ( /^o /gm.test( text ) === false ) {
geometry = {
vertices: [],
normals: [],
uvs: []
};
material = {
name: ''
};
object = {
name: '',
geometry: geometry,
material: material
};
objects.push( object );
}
var vertices = [];
var normals = [];
var uvs = [];
// v float float float
var vertex_pattern = /v( +[\d|\.|\+|\-|e|E]+)( +[\d|\.|\+|\-|e|E]+)( +[\d|\.|\+|\-|e|E]+)/;
// vn float float float
var normal_pattern = /vn( +[\d|\.|\+|\-|e|E]+)( +[\d|\.|\+|\-|e|E]+)( +[\d|\.|\+|\-|e|E]+)/;
// vt float float
var uv_pattern = /vt( +[\d|\.|\+|\-|e|E]+)( +[\d|\.|\+|\-|e|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 = text.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(
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(
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(
parseFloat( result[ 1 ] ),
parseFloat( result[ 2 ] )
);
} else if ( ( result = face_pattern1.exec( line ) ) !== null ) {
// ["f 1 2 3", "1", "2", "3", undefined]
addFace(
result[ 1 ], result[ 2 ], result[ 3 ], result[ 4 ]
);
} 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]
addFace(
result[ 2 ], result[ 5 ], result[ 8 ], result[ 11 ],
result[ 3 ], result[ 6 ], result[ 9 ], result[ 12 ]
);
} 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]
addFace(
result[ 2 ], result[ 6 ], result[ 10 ], result[ 14 ],
result[ 3 ], result[ 7 ], result[ 11 ], result[ 15 ],
result[ 4 ], result[ 8 ], result[ 12 ], result[ 16 ]
);
} 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]
addFace(
result[ 2 ], result[ 5 ], result[ 8 ], result[ 11 ],
undefined, undefined, undefined, undefined,
result[ 3 ], result[ 6 ], result[ 9 ], result[ 12 ]
);
} else if ( /^o /.test( line ) ) {
geometry = {
vertices: [],
normals: [],
uvs: []
};
material = {
name: ''
};
object = {
name: line.substring( 2 ).trim(),
geometry: geometry,
material: material
};
objects.push( object )
} else if ( /^g /.test( line ) ) {
// group
} else if ( /^usemtl /.test( line ) ) {
// material
material.name = 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 );
}
}
var container = new THREE.Object3D();
for ( var i = 0, l = objects.length; i < l; i ++ ) {
object = objects[ i ];
geometry = object.geometry;
var buffergeometry = new THREE.BufferGeometry();
buffergeometry.addAttribute( 'position', new THREE.BufferAttribute( new Float32Array( geometry.vertices ), 3 ) );
if ( geometry.normals.length > 0 ) {
buffergeometry.addAttribute( 'normal', new THREE.BufferAttribute( new Float32Array( geometry.normals ), 3 ) );
}
if ( geometry.uvs.length > 0 ) {
buffergeometry.addAttribute( 'uv', new THREE.BufferAttribute( new Float32Array( geometry.uvs ), 2 ) );
}
material = new THREE.MeshLambertMaterial();
material.name = object.material.name;
var mesh = new THREE.Mesh( buffergeometry, material );
mesh.name = object.name;
container.add( mesh );
}
console.timeEnd( 'OBJLoader' );
return container;
}
};

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