for(int i = 0; i <= numVerts  * numVerts * 2; i++)
            {
                //generate top vertices
                if (z < numVerts)
                {
                    if (x < numVerts)
                    {
                        vertices[i].Position.X = x + stepsize;
                        vertices[i].Position.Y = y;
                        vertices[i].Position.Z = z;
                    }
                    else
                    {
                        z = z + stepsize;
                        x = 0;
                    }
                }
            }