   How to read the 3D chart data with directX?
  I am reading a open source project, and I found there is a function which read 3D data(let's say a character) from obj file, and draw it . the source code:    List<Vertex3f> verts=new List<Vertex3f>();   List<Vertex3f> norms=new List<Vertex3f>();   Groups=new List<ToothGroup>();   //ArrayList ALf=new ArrayList();//faces always part of a group   List<Face> faces=new List<Face>();   MemoryStream stream=new MemoryStream(buffer);   using(StreamReader sr = new StreamReader(stream)){  String line;  Vertex3f vertex;  string[] items;  string[] subitems;  Face face;  ToothGroup group=null;  while((line = sr.ReadLine()) != null) { if(line.StartsWith("#")//comment|| line.StartsWith("mtllib")//material library.  We build our own.|| line.StartsWith("usemtl")//use material|| line.StartsWith("o")) {//object. There's only one object continue; } if(line.StartsWith("v ")) {//vertexitems=line.Split(new char[] { ' ' });vertex=new Vertex3f();//float[3];if(flipHorizontally) {    vertex.X=-Convert.ToSingle(items[1],CultureInfo.InvariantCulture);}else {    vertex.X=Convert.ToSingle(items[1],CultureInfo.InvariantCulture);}vertex.Y=Convert.ToSingle(items[2],CultureInfo.InvariantCulture);vertex.Z=Convert.ToSingle(items[3],CultureInfo.InvariantCulture);verts.Add(vertex);continue; }And why it need to read the data manually in directX? As far as I know, in XDA programming, we just need to call a function a load the resource.Is this because it is in DirectX, there is no function to read resource? If yes, then how to prepare the 3D resource ? in XDA we just need to use other software draw the 3D picture and then export. but what should I do in DirectX?   