write_geo_strg_data3_rank3_R4P Function

   function write_geo_strg_data3_rank3_R4P(self, n, x, y, z) result(error)
   !< Write mesh with **StructuredGrid** topology (data 3, rank 3, R4P).
   class(xml_writer_abstract), intent(inout) :: self        !< Writer.
   integer(I4P),               intent(in)    :: n           !< Number of nodes.
   real(R4P),                  intent(in)    :: x(1:,1:,1:) !< X coordinates.
   real(R4P),                  intent(in)    :: y(1:,1:,1:) !< Y coordinates.
   real(R4P),                  intent(in)    :: z(1:,1:,1:) !< Z coordinates.
   integer(I4P)                              :: error       !< Error status.

   if ((n/=size(x, dim=1)*size(x, dim=2)*size(x, dim=3)).or.&
       (n/=size(y, dim=1)*size(y, dim=2)*size(y, dim=3)).or.&
       (n/=size(z, dim=1)*size(z, dim=2)*size(z, dim=3))) then
      self%error = 1
      return
   endif
   call self%write_start_tag(name='Points')
   error = self%write_dataarray(data_name='Points', x=x, y=y, z=z)
   call self%write_end_tag(name='Points')
   error = self%error
   endfunction write_geo_strg_data3_rank3_R4P