mbr_2_obj

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  using System; using System.IO; using System.Linq; using System.Text; using System.Collections; 
  using System.Collections.Generic; using System.Text.RegularExpressions; using System.Globalization; 
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sealed class Test
{
    static uint vertexCount; 
    static uint faceCount;

    public static void Main()
    {
        SearchOption SOAD = SearchOption.AllDirectories;
        string[] filesName = Directory.GetFiles(Directory.GetCurrentDirectory(), "*.mbr",  SOAD); 
        System.Threading.Thread.CurrentThread.CurrentCulture = new CultureInfo("en-US");

        foreach (var fileIn in filesName)
        {
						using (BinaryReader br = new BinaryReader(File.Open(fileIn, FileMode.Open)))
						{
                    br.ReadUInt16();

                    int submesh_count = br.ReadInt32(); 
                    
                    for (int o = 0; o < submesh_count; o++)
                    {

								using (StreamWriter sw = new StreamWriter(fileIn + o + ".obj"))
								{
								    O3dModel o3d = new O3dModel();

                        ushort type = br.ReadUInt16();

                        for(int i = 0; i < 2; i++) br.ReadBytes(48);

                        for(int i = 0; i < 27; i++) br.ReadSingle();
                        
                        vertexCount = br.ReadUInt32(); 
                        faceCount   = br.ReadUInt32(); 

                        for(int i = 0; i < vertexCount; i++) 
                        {
                            o3d_vertex newv = new o3d_vertex();
                            newv.x = br.ReadSingle();
                            newv.y = br.ReadSingle();
                            newv.z = br.ReadSingle();
                            o3d.vertexes.Add(newv);
                        }

                        for(int i = 0; i < faceCount; i++) 
                        {
                            o3d_face newf = new o3d_face();
                            br.ReadByte();br.ReadByte();br.ReadByte();br.ReadByte();
                            br.ReadSingle();br.ReadSingle();br.ReadSingle();br.ReadSingle();
                            br.ReadSingle();br.ReadSingle();br.ReadSingle();br.ReadSingle();
                            for (int ii = 0; ii < 4; ii++) 
                            {
                                newf.index[ii] = br.ReadUInt16();
                                //Console.Write(newf.index[ii] + " ");
                            } //Console.WriteLine();
                            o3d.faces.Add(newf); 
                            br.ReadUInt16();br.ReadUInt16();br.ReadUInt16();
                        }

                        for(int i = 0; i < vertexCount; i++) br.ReadUInt32(); 

                        if (type == 2)
                        {
                            int count_float = br.ReadInt32(); 

                            if (count_float > 0)
                            {
                                for(int i = 0; i < count_float; i++) 
                                {
                                    o3d_face newf = new o3d_face();
                                    br.ReadByte();br.ReadByte();br.ReadByte();br.ReadByte();
                                    br.ReadSingle();br.ReadSingle();br.ReadSingle();br.ReadSingle();
                                    br.ReadSingle();br.ReadSingle();br.ReadSingle();br.ReadSingle();
                                    for (int ii = 0; ii < 4; ii++) 
                                    {
                                        newf.index[ii] = br.ReadUInt16();
                                        //Console.Write(newf.index[ii] + " ");
                                    } //Console.WriteLine();
                                    //o3d.faces.Add(newf); // это грани ? слишком много 65***
                                    br.ReadUInt16();br.ReadUInt16();br.ReadUInt16();
                                }
                                
                                for(int i = 0; i < count_float; i++) 
                                for(int iii = 0; iii < 5; iii++) br.ReadUInt16();
                            }
                              for(int i = 0; i < 6; i++) br.ReadSingle();
                        }

// ======================================================== 

                    foreach (var v in o3d.vertexes)
                    sw.WriteLine("v " + v.x + " " + v.y + " " + v.z);

                    var enumerator = o3d.faces.GetEnumerator();

                    foreach (var v in o3d.faces)
                    {
                        if (v.index[0] == 65535 || v.index[1] == 65535 || v.index[2] == 65535 ) enumerator.MoveNext();
                        sw.WriteLine("f " + (v.index[0]+1) + " " + (v.index[1]+1) + " " + (v.index[2]+1));
                        if (v.index[3] != 65535) sw.WriteLine("f " + (v.index[0]+1) + " " + (v.index[2]+1) + " " + (v.index[3]+1));
                    }
                    
                    
                }
                }
            }
        } // foreach (var file in filesName)
    } // public static void Main()
} // sealed class Test {

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public class O3dModel
{
    public List<o3d_vertex> vertexes = new List<o3d_vertex>();
    public List<o3d_face>   faces = new List<o3d_face>();
}

// ======================================================== 

public class o3d_vertex 
{
  public float x, y, z; // Model vertex position (XYZ)
}

// ======================================================== 
 
public class o3d_face // грань/полигон (треугольник или четырехугольник)
{
  public ushort[] index = new ushort[4];
}