write_geo_unst_data3_rank1_R4P Function

   function write_geo_unst_data3_rank1_R4P(self, np, nc, x, y, z) result(error)
   !< Write mesh with **UnstructuredGrid** topology (data 3, rank 1, R4P).
   class(xml_writer_abstract), intent(inout) :: self  !< Writer.
   integer(I4P),               intent(in)    :: np    !< Number of points.
   integer(I4P),               intent(in)    :: nc    !< Number of cells.
   real(R4P),                  intent(in)    :: x(1:) !< X coordinates.
   real(R4P),                  intent(in)    :: y(1:) !< Y coordinates.
   real(R4P),                  intent(in)    :: z(1:) !< Z coordinates.
   integer(I4P)                              :: error !< Error status.

   if ((np/=size(x, dim=1)).or.(np/=size(y, dim=1)).or.(np/=size(z, dim=1))) 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_unst_data3_rank1_R4P