diff --git a/BMapBindings/BMapSharp/BMapSharp/BMapWrapper.cs b/BMapBindings/BMapSharp/BMapSharp/BMapWrapper.cs
index be32901..60d25f2 100644
--- a/BMapBindings/BMapSharp/BMapSharp/BMapWrapper.cs
+++ b/BMapBindings/BMapSharp/BMapSharp/BMapWrapper.cs
@@ -1,5 +1,4 @@
 using System;
-using System.Reflection.Metadata.Ecma335;
 using System.Runtime.InteropServices;
 using BMapSharp.VirtoolsTypes;
 
@@ -23,6 +22,9 @@ namespace BMapSharp.BMapWrapper {
     }
 
     public static class Utils {
+
+        #region Constant Values
+
         /// <summary>The representation of invalid raw pointer.</summary>
         internal static readonly IntPtr INVALID_PTR = IntPtr.Zero;
         /// <summary>The representation of invalid CK_ID.</summary>
@@ -35,10 +37,54 @@ namespace BMapSharp.BMapWrapper {
             Console.WriteLine(msg);
         }
 
+        #endregion
+
+        #region Help Functions
+
+        private static void StructAssigner<T>(IntPtr pstruct, uint count, IEnumerable<T> iem) {
+            var stride = Marshal.SizeOf<T>();
+            var itor = iem.GetEnumerator();
+            for (uint i = 0; i < count; ++i) {
+                BMapException.ThrowIfFailed(itor.MoveNext());
+                Marshal.StructureToPtr<T>(itor.Current, pstruct, false);
+                pstruct += stride;
+            }
+        }
+        internal static void VxVector3Assigner(IntPtr pstruct, uint count, IEnumerable<VxVector3> iem)
+            => StructAssigner<VxVector3>(pstruct, count, iem);
+        internal static void VxVector2Assigner(IntPtr pstruct, uint count, IEnumerable<VxVector2> iem)
+            => StructAssigner<VxVector2>(pstruct, count, iem);
+        internal static void CKFaceIndicesAssigner(IntPtr pstruct, uint count, IEnumerable<CKFaceIndices> iem)
+            => StructAssigner<CKFaceIndices>(pstruct, count, iem);
+        internal static void CKShortFaceIndicesAssigner(IntPtr pstruct, uint count, IEnumerable<CKShortFaceIndices> iem)
+            => StructAssigner<CKShortFaceIndices>(pstruct, count, iem); // TODO: There is a padding bug!!!
+        
+        private static IEnumerable<T> StructIterator<T>(IntPtr pstruct, uint count) {
+            var stride = Marshal.SizeOf<T>();
+            for (uint i = 0; i < count; ++i) {
+                yield return Marshal.PtrToStructure<T>(pstruct);
+                pstruct += stride;
+            }
+        }
+        internal static IEnumerable<VxVector3> VxVector3Iterator(IntPtr pstruct, uint count)
+            => StructIterator<VxVector3>(pstruct, count);
+        internal static IEnumerable<VxVector2> VxVector2Iterator(IntPtr pstruct, uint count)
+            => StructIterator<VxVector2>(pstruct, count);
+        internal static IEnumerable<CKFaceIndices> CKFaceIndicesIterator(IntPtr pstruct, uint count)
+            => StructIterator<CKFaceIndices>(pstruct, count);
+        internal static IEnumerable<CKShortFaceIndices> CKShortFaceIndicesIterator(IntPtr pstruct, uint count)
+            => StructIterator<CKShortFaceIndices>(pstruct, count); // TODO: There is a padding bug!!!
+
+        #endregion
+
+        #region End User Exposed
+
         private static readonly BMapGuard Singleton = new BMapGuard();
         public static bool IsBMapAvailable() {
             return !Singleton.IsInvalid;
         }
+
+        #endregion
     }
 
     public abstract class AbstractPointer : SafeHandle {
@@ -49,8 +95,8 @@ namespace BMapSharp.BMapWrapper {
         public override bool IsInvalid => this.handle == Utils.INVALID_PTR;
         protected override bool ReleaseHandle() => throw new NotImplementedException();
 
-        protected bool isValid() => this.handle != Utils.INVALID_PTR;
-        protected IntPtr getPointer() => this.handle;
+        internal bool isValid() => this.handle != Utils.INVALID_PTR;
+        internal IntPtr getPointer() => this.handle;
 
         // protected AbstractPointer(IntPtr raw_pointer) : base(raw_pointer, true) {}
 
@@ -87,10 +133,8 @@ namespace BMapSharp.BMapWrapper {
         // #endregion
 
         #region Misc
-
         public override int GetHashCode() => this.handle.GetHashCode();
         public override string ToString() => this.handle.ToString();
-
         #endregion
     }
 
@@ -105,9 +149,9 @@ namespace BMapSharp.BMapWrapper {
         protected override bool ReleaseHandle() => throw new NotImplementedException();
 
         private readonly uint m_CKID;
-        protected bool isValid() => this.handle != Utils.INVALID_PTR && m_CKID != Utils.INVALID_CKID;
-        protected IntPtr getPointer() => this.handle;
-        protected uint getCKID() => m_CKID;
+        internal bool isValid() => this.handle != Utils.INVALID_PTR && m_CKID != Utils.INVALID_CKID;
+        internal IntPtr getPointer() => this.handle;
+        internal uint getCKID() => m_CKID;
 
         // private uint m_CKID;
 
@@ -156,15 +200,11 @@ namespace BMapSharp.BMapWrapper {
         internal BMObject(IntPtr raw_pointer, uint ckid) : base(raw_pointer, ckid) { }
 
         public string GetName() {
-            BMapException.ThrowIfFailed(BMap.BMObject_GetName(
-                this.getPointer(), this.getCKID(), out string out_name
-            ));
+            BMapException.ThrowIfFailed(BMap.BMObject_GetName(getPointer(), getCKID(), out string out_name));
             return out_name;
         }
         public void SetName(string name) {
-            BMapException.ThrowIfFailed(BMap.BMObject_SetName(
-                this.getPointer(), this.getCKID(), name
-            ));
+            BMapException.ThrowIfFailed(BMap.BMObject_SetName(getPointer(), getCKID(), name));
         }
     }
 
@@ -182,10 +222,56 @@ namespace BMapSharp.BMapWrapper {
 
     public class BM3dObject : BMObject {
         internal BM3dObject(IntPtr raw_pointer, uint ckid) : base(raw_pointer, ckid) { }
+
+        public VxMatrix GetWorldMatrix() {
+            BMapException.ThrowIfFailed(BMap.BM3dObject_GetWorldMatrix(getPointer(), getCKID(), out VxMatrix out_mat));
+            return out_mat;
+        }
+
+        public void SetWorldMatrix(VxMatrix mat) {
+            BMapException.ThrowIfFailed(BMap.BM3dObject_SetWorldMatrix(getPointer(), getCKID(), mat));
+        }
+
+        public BMMesh GetCurrentMesh() {
+            BMapException.ThrowIfFailed(BMap.BM3dObject_GetCurrentMesh(getPointer(), getCKID(), out uint out_meshid));
+            if (out_meshid == Utils.INVALID_CKID) return null;
+            else return new BMMesh(getPointer(), out_meshid);
+        }
+
+        public void SetCurrentMesh(BMMesh mesh) {
+            uint meshid = (mesh is null) ? Utils.INVALID_CKID : mesh.getCKID();
+            BMapException.ThrowIfFailed(BMap.BM3dObject_SetCurrentMesh(getPointer(), getCKID(), meshid));
+        }
+
+        public bool GetVisibility() {
+            BMapException.ThrowIfFailed(BMap.BM3dObject_GetVisibility(getPointer(), getCKID(), out bool out_isVisible));
+            return out_isVisible;
+        }
+
+        public void SetVisibility(bool visb) {
+            BMapException.ThrowIfFailed(BMap.BM3dObject_SetVisibility(getPointer(), getCKID(), visb));
+        }
     }
 
     public class BMGroup : BMObject {
         internal BMGroup(IntPtr raw_pointer, uint ckid) : base(raw_pointer, ckid) { }
+
+        public void AddObject(BM3dObject member) {
+            BMapException.ThrowIfFailed(BMap.BMGroup_AddObject(getPointer(), getCKID(), member.getCKID()));
+        }
+
+        public uint GetObjectCount() {
+            BMapException.ThrowIfFailed(BMap.BMGroup_GetObjectCount(getPointer(), getCKID(), out uint out_count));
+            return out_count;
+        }
+
+        public IEnumerable<BM3dObject> GetObjects() {
+            var size = GetObjectCount();
+            for (uint i = 0; i < size; ++i) {
+                BMapException.ThrowIfFailed(BMap.BMGroup_GetObject(getPointer(), getCKID(), i, out uint out_objid));
+                yield return new BM3dObject(getPointer(), out_objid);
+            }
+        }
     }
 
     public sealed class BMFileReader : AbstractPointer {
@@ -272,4 +358,17 @@ namespace BMapSharp.BMapWrapper {
         public BMGroup CreateGroup() => createCKObject<BMGroup>(BMap.BMFile_CreateGroup, (bmf, id) => new BMGroup(bmf, id));
     }
 
+    public sealed class BMMeshTrans : AbstractPointer {
+        private static IntPtr allocateHandle() {
+            BMapException.ThrowIfFailed(BMap.BMMeshTrans_New(out IntPtr out_trans));
+            return out_trans;
+        }
+        protected override bool ReleaseHandle() {
+            return BMap.BMMeshTrans_Delete(this.getPointer());
+        }
+        public BMMeshTrans() : base(allocateHandle()) { }
+
+
+    }
+
 }
diff --git a/BMapBindings/BMapSharp/BMapSharp/VirtoolsTypes.cs b/BMapBindings/BMapSharp/BMapSharp/VirtoolsTypes.cs
index 416fe0c..df4374a 100644
--- a/BMapBindings/BMapSharp/BMapSharp/VirtoolsTypes.cs
+++ b/BMapBindings/BMapSharp/BMapSharp/VirtoolsTypes.cs
@@ -166,6 +166,18 @@ namespace BMapSharp.VirtoolsTypes {
         }
     }
 
+    [StructLayout(LayoutKind.Sequential, Pack = 4, CharSet = CharSet.Ansi)]
+    public struct CKShortFaceIndices {
+        [MarshalAs(UnmanagedType.U2)]
+        public ushort I1, I2, I3;
+
+        public CKShortFaceIndices(ushort i1 = 0, ushort i2 = 0, ushort i3 = 0) {
+            I1 = i1;
+            I2 = i2;
+            I3 = i3;
+        }
+    }
+
     public enum CK_TEXTURE_SAVEOPTIONS : uint {
         CKTEXTURE_RAWDATA = 0,	/**< Save raw data inside file. The bitmap is saved in a raw 32 bit per pixel format.  */
         CKTEXTURE_EXTERNAL = 1,	/**< Store only the file name for the texture. The bitmap file must be present in the bitmap paths when loading the composition.  */
diff --git a/BMapBindings/BMapSharp/BMapSharpTestbench/Program.cs b/BMapBindings/BMapSharp/BMapSharpTestbench/Program.cs
index 7bd5376..e92efcf 100644
--- a/BMapBindings/BMapSharp/BMapSharpTestbench/Program.cs
+++ b/BMapBindings/BMapSharp/BMapSharpTestbench/Program.cs
@@ -23,30 +23,39 @@ namespace BMapSharpTestbench {
             string[] encodings = ["cp1252", "gb2312"];
 
             using (var reader = new BMapSharp.BMapWrapper.BMFileReader(file_name, temp_folder, texture_folder, encodings)) {
-                Console.WriteLine("===== Groups =====");
-                foreach (var gp in reader.GetGroups()) {
-                    Console.WriteLine(gp.GetName());
-                }
+                // Console.WriteLine("===== Groups =====");
+                // foreach (var gp in reader.GetGroups()) {
+                //     Console.WriteLine(gp.GetName());
+                //     foreach (var gp_item in gp.GetObjects()) {
+                //         Console.WriteLine($"\t{gp_item.GetName()}");
+                //     }
+                // }
 
                 Console.WriteLine("===== 3dObjects =====");
                 foreach (var obj in reader.Get3dObjects()) {
                     Console.WriteLine(obj.GetName());
+
+                    var current_mesh = obj.GetCurrentMesh();
+                    var mesh_name = current_mesh is null ? "<null>" : current_mesh.GetName();
+                    Console.WriteLine($"\tMesh: {mesh_name}");
+                    Console.WriteLine($"\tVisibility: {obj.GetVisibility()}");
+                    Console.WriteLine($"\tMatrix: {obj.GetWorldMatrix().ToManaged()}");
                 }
 
-                Console.WriteLine("===== Meshes =====");
-                foreach (var mesh in reader.GetMeshes()) {
-                    Console.WriteLine(mesh.GetName());
-                }
+                // Console.WriteLine("===== Meshes =====");
+                // foreach (var mesh in reader.GetMeshes()) {
+                //     Console.WriteLine(mesh.GetName());
+                // }
 
-                Console.WriteLine("===== Materials =====");
-                foreach (var mtl in reader.GetMaterials()) {
-                    Console.WriteLine(mtl.GetName());
-                }
+                // Console.WriteLine("===== Materials =====");
+                // foreach (var mtl in reader.GetMaterials()) {
+                //     Console.WriteLine(mtl.GetName());
+                // }
 
-                Console.WriteLine("===== Textures =====");
-                foreach (var tex in reader.GetTextures()) {
-                    Console.WriteLine(tex.GetName());
-                }
+                // Console.WriteLine("===== Textures =====");
+                // foreach (var tex in reader.GetTextures()) {
+                //     Console.WriteLine(tex.GetName());
+                // }
 
             }