threex
Version:
Game Extensions for three.js http://www.threejsgames.com/extensions/
107 lines (59 loc) • 2.17 kB
JavaScript
/**
* @author mrdoob / http://mrdoob.com/
*/
THREE.OBJExporter = function () {};
THREE.OBJExporter.prototype = {
constructor: THREE.OBJExporter,
parse: function ( geometry ) {
console.log( geometry );
var output = '';
for ( var i = 0, l = geometry.vertices.length; i < l; i ++ ) {
var vertex = geometry.vertices[ i ];
output += 'v ' + vertex.x + ' ' + vertex.y + ' ' + vertex.z + '\n';
}
// uvs
for ( var i = 0, l = geometry.faceVertexUvs[ 0 ].length; i < l; i ++ ) {
var vertexUvs = geometry.faceVertexUvs[ 0 ][ i ];
for ( var j = 0; j < vertexUvs.length; j ++ ) {
var uv = vertexUvs[ j ];
output += 'vt ' + uv.x + ' ' + uv.y + '\n';
}
}
// normals
for ( var i = 0, l = geometry.faces.length; i < l; i ++ ) {
var normals = geometry.faces[ i ].vertexNormals;
for ( var j = 0; j < normals.length; j ++ ) {
var normal = normals[ j ];
output += 'vn ' + normal.x + ' ' + normal.y + ' ' + normal.z + '\n';
}
}
// map
var count = 1; // OBJ values start by 1
var map = [ count ];
for ( var i = 0, l = geometry.faces.length; i < l; i ++ ) {
var face = geometry.faces[ i ];
if ( face instanceof THREE.Face3 ) {
count += 3;
} else if ( face instanceof THREE.Face4 ) {
count += 4;
}
map.push( count );
}
// faces
for ( var i = 0, l = geometry.faces.length; i < l; i ++ ) {
var face = geometry.faces[ i ];
output += 'f ';
if ( face instanceof THREE.Face3 ) {
output += ( face.a + 1 ) + '/' + ( map[ i ] ) + '/' + ( map[ i ] ) + ' ';
output += ( face.b + 1 ) + '/' + ( map[ i ] + 1 ) + '/' + ( map[ i ] + 1 ) + ' ';
output += ( face.c + 1 ) + '/' + ( map[ i ] + 2 ) + '/' + ( map[ i ] + 2 ) + '\n';
} else if ( face instanceof THREE.Face4 ) {
output += ( face.a + 1 ) + '/' + ( map[ i ] ) + '/' + ( map[ i ] ) + ' ';
output += ( face.b + 1 ) + '/' + ( map[ i ] + 1 ) + '/' + ( map[ i ] + 1 ) + ' ';
output += ( face.c + 1 ) + '/' + ( map[ i ] + 2 ) + '/' + ( map[ i ] + 2 ) + ' ';
output += ( face.d + 1 ) + '/' + ( map[ i ] + 3 ) + '/' + ( map[ i ] + 3 ) + '\n';
}
}
return output;
}
}