Setting the extents for OverlappingAMR data set

Hello all,

I am writing a parallel reader for our in house AMR data. I am close, but I have some confusion with the request information routine and it’s requirement for “UPDATE_EXTENT” portion.

I am a bit confused what to put for the 6 numbers i_lo, j_lo,k_lo, i_hi, j_hi, k_hi since an overlapping AMR data set has a lot of Uniform Grids defined by AMR boxes. I understand the extents for each of the grids that make up an vtkOverlappingAMR data set, but how do I define only one?

Thanks in advance,