three-js
Version:
JavaScript 3D library and its addons
407 lines (244 loc) • 8.71 kB
JavaScript
module.exports = function( THREE ){
/**
* @author mrdoob / http://mrdoob.com/
*/
THREE.OBJLoader = function ( manager ) {
this.manager = ( manager !== undefined ) ? manager : THREE.DefaultLoadingManager;
this.materials = null;
};
THREE.OBJLoader.prototype = {
constructor: THREE.OBJLoader,
load: function ( url, onLoad, onProgress, onError ) {
var scope = this;
var loader = new THREE.XHRLoader( scope.manager );
loader.setPath( this.path );
loader.load( url, function ( text ) {
onLoad( scope.parse( text ) );
}, onProgress, onError );
},
setPath: function ( value ) {
this.path = value;
},
setMaterials: function ( materials ) {
this.materials = materials;
},
parse: function ( text ) {
console.time( 'OBJLoader' );
var objects = [];
var object;
var foundObjects = false;
var vertices = [];
var normals = [];
var uvs = [];
function addObject( name ) {
var geometry = {
vertices: [],
normals: [],
uvs: []
};
var material = {
name: '',
smooth: true
};
object = {
name: name,
geometry: geometry,
material: material
};
objects.push( object );
}
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 ) {
object.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 ) {
object.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 ) {
object.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 );
}
}
}
addObject( '' );
// v float float float
var vertex_pattern = /^v\s+([\d|\.|\+|\-|e|E]+)\s+([\d|\.|\+|\-|e|E]+)\s+([\d|\.|\+|\-|e|E]+)/;
// vn float float float
var normal_pattern = /^vn\s+([\d|\.|\+|\-|e|E]+)\s+([\d|\.|\+|\-|e|E]+)\s+([\d|\.|\+|\-|e|E]+)/;
// vt float float
var uv_pattern = /^vt\s+([\d|\.|\+|\-|e|E]+)\s+([\d|\.|\+|\-|e|E]+)/;
// f vertex vertex vertex ...
var face_pattern1 = /^f\s+(-?\d+)\s+(-?\d+)\s+(-?\d+)(?:\s+(-?\d+))?/;
// f vertex/uv vertex/uv vertex/uv ...
var face_pattern2 = /^f\s+((-?\d+)\/(-?\d+))\s+((-?\d+)\/(-?\d+))\s+((-?\d+)\/(-?\d+))(?:\s+((-?\d+)\/(-?\d+)))?/;
// f vertex/uv/normal vertex/uv/normal vertex/uv/normal ...
var face_pattern3 = /^f\s+((-?\d+)\/(-?\d+)\/(-?\d+))\s+((-?\d+)\/(-?\d+)\/(-?\d+))\s+((-?\d+)\/(-?\d+)\/(-?\d+))(?:\s+((-?\d+)\/(-?\d+)\/(-?\d+)))?/;
// f vertex//normal vertex//normal vertex//normal ...
var face_pattern4 = /^f\s+((-?\d+)\/\/(-?\d+))\s+((-?\d+)\/\/(-?\d+))\s+((-?\d+)\/\/(-?\d+))(?:\s+((-?\d+)\/\/(-?\d+)))?/;
var object_pattern = /^[og]\s+(.+)/;
var smoothing_pattern = /^s\s+(\d+|on|off)/;
//
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 ( ( result = object_pattern.exec( line ) ) !== null ) {
// o object_name
// or
// g group_name
var name = result[ 1 ].trim();
if ( foundObjects === false ) {
foundObjects = true;
object.name = name;
} else {
addObject( name );
}
} else if ( /^usemtl /.test( line ) ) {
// material
object.material.name = line.substring( 7 ).trim();
} else if ( /^mtllib /.test( line ) ) {
// mtl file
} else if ( ( result = smoothing_pattern.exec( line ) ) !== null ) {
// smooth shading
object.material.smooth = result[ 1 ] === "1" || result[ 1 ] === "on";
} else {
throw new Error( "Unexpected line: " + line );
}
}
var container = new THREE.Group();
for ( var i = 0, l = objects.length; i < l; i ++ ) {
object = objects[ i ];
var 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 ) );
} else {
buffergeometry.computeVertexNormals();
}
if ( geometry.uvs.length > 0 ) {
buffergeometry.addAttribute( 'uv', new THREE.BufferAttribute( new Float32Array( geometry.uvs ), 2 ) );
}
var material;
if ( this.materials !== null ) {
material = this.materials.create( object.material.name );
}
if ( !material ) {
material = new THREE.MeshPhongMaterial();
material.name = object.material.name;
}
material.shading = object.material.smooth ? THREE.SmoothShading : THREE.FlatShading;
var mesh = new THREE.Mesh( buffergeometry, material );
mesh.name = object.name;
container.add( mesh );
}
console.timeEnd( 'OBJLoader' );
return container;
}
};
};