# Acoular 21.05 documentation

## RectGrid3D

«  RectGrid   ::   grids   ::   ImportGrid  »

# RectGrid3D¶

class acoular.grids.RectGrid3D

Provides a cartesian 3D grid for the beamforming results.

The grid has cubic or nearly cubic cells. It is defined by lower and upper x-, y- and z-limits.

z_min = Float(-1.0, …

The lower z-limit that defines the grid, defaults to -1.

z_max = Float(1.0, …

The upper z-limit that defines the grid, defaults to 1.

nzsteps = Property( …

Number of grid points along x-axis, readonly.

increment = Property(desc="step size")

The cell side length for the grid. This can either be a scalar (same increments in all 3 dimensions) or a (3,) array of floats with respective increments in x,y, and z-direction (in m). Defaults to 0.1.

index(x, y, z)

Queries the indices for a grid point near a certain co-ordinate.

This can be used to query results or co-ordinates at/near a certain co-ordinate.

Parameters
x, y, zfloat

The co-ordinates for which the indices is queried.

Returns
3-tuple of integers

The indices that give the grid point nearest to the given x, y, z co-ordinates from an array with the same shape as the grid.

indices(x1, y1, z1, x2, y2, z2)

Queries the indices for a subdomain in the grid.

Allows box-shaped subdomains. This can be used to mask or to query results from a certain sector or subdomain.

Parameters
x1, y1, z1, x2, y2, z2float

A box-shaped sector is assumed that is given by two corners (x1,y1,z1) and (x2,y2,z2).

Returns
3-tuple of numpy slice objects

The indices that can be used to mask/select the grid subdomain from an array with the same shape as the grid.

«  RectGrid   ::   grids   ::   ImportGrid  »