class MeshGeometry 
{

        std::vector<int>   mIdeces;
        std::vector<float> mVertices;
        std::vector<float> mUVs;
        std::vector<float> mMapNormals;
        std::vector<float> mMapTangets;

        Public:
    
         Vector3 GetVertices( const int &_index ) const 
         {
               return Vector3(  mVertices[_index] , 
                                mVertices[_index + 1] , 
                                mVertices[_index + 2]);
         }


         Vector3i GetTriangleIndex(const int &tri_index)
         {
                int i = 3 * tri_index;
              return Vector3i(mIdeces[i] ,
                              mIdeces[i + 1] ,
                              mIdeces[i + 2] );
         }


        /// и.т.д ...!

};

class MeshGeometry 
{

        std::vector<Vector3i> mTriIndexes;
        std::vector<Vector3>  mVertices;
        std::vector<Vector2>  mUVs;
        std::vector<Vector3>  mMapNormals;
        std::vector<Vector3>  mMapTangets;

        Public:
    
         Vector3 GetVertices( int _index ) const 
         {
               return Vector3(  mVertices[_index] , 
                                mVertices[_index + 1] , 
                                mVertices[_index + 2]);
         }

         Vector3i GetTriangleIndex(const int &tri_index)
         {
               return Vector3i(mTriIndexes[tri_index] );
         }


        /// и.т.д ...!

};

class MeshGeometry 
{
      struct Vertex 
      { 
          Vector3 v;
          Vector3 n, c;
          Vector2 uv;
          bool isHaveN, isHaveUV, isHaveC; 
      }
        std::vector<Vector3i> mTriIndexes;
        std::vector<Vertex>  mVertexes;

        Public:
    
         Vertex GetVertices( int _index ) const 
         {
               return mVertexes[_index];
         }

         Vector3i GetTriangleIndex(const int &tri_index)
         {
               return Vector3i(mTriIndexes[tri_index] );
         }


        /// и.т.д ...!

};