pism::LocalInterpCtx Class Reference

#include <LocalInterpCtx.hh>

Public Member Functions
	LocalInterpCtx (const grid::InputGridInfo &input_grid, const Grid &internal_grid, InterpolationType type)
	LocalInterpCtx (const grid::InputGridInfo &input_grid, const Grid &internal_grid, const std::vector< double > &z_internal, InterpolationType type)
	Construct a local interpolation context. More...
int	buffer_size () const

Public Attributes
std::array< int, 4 >	start
std::array< int, 4 >	count
std::shared_ptr< Interpolation >	x
std::shared_ptr< Interpolation >	y
std::shared_ptr< Interpolation >	z

Detailed Description

The "local interpolation context" describes the processor's part of the source NetCDF file (for regridding).

The local interpolation context contains the details of how the processor's block of the new computational domain fits into the domain of the netCDF file. Note that each vertical column of the grid is owned by exactly one processor.

For any particular dimension, we have a new computational domain \([a,b]\) with spacing \(h\) so there are \(n = (b - a) / h\) interior cells, indexed by \(\{i_0, \dots, i_n\}\). The local processor owns a range \(\{i_m, \dots, i_{m'}\}\). Suppose the netCDF file has domain \([A,B]\), spacing \(H\), and \(N = (B - A) / H\) cells. In order to interpolate onto these points, we need the indices \(\{I_m, \dots, I_{m'}\}\) of the netCDF file so that

\[ [x(i_m), x(i_{m'})] \quad \text{is a subset of} \quad [x(I_m), x(I_{m'})] \]

The arrays start and count have 4 integer entries, corresponding to the dimensions t, x, y, z(zb).

Definition at line 54 of file LocalInterpCtx.hh.

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The documentation for this class was generated from the following files:

• src/util/io/LocalInterpCtx.hh
• src/util/io/LocalInterpCtx.cc