KeepCol

class marxs.simulator.KeepCol(colname)

Bases: object

Object that records the value of one column after each simulation step.

KeepCol is meant to be used with the preprocess_steps or postprocess_steps parameters of Sequence. It will make a copy of one column in the photon table before or after each processing step and keep this copy in its data attribute.

Parameters

colnamestring

name of column

Attributes

datalist

List of saved data. This will be empty initially.

Methods Summary

__call__(photons)	Call self as a function.
format_positions([atol])	Format saved position columns as a single array.

Methods Documentation

__call__(photons)

Call self as a function.

format_positions(atol=None)

Format saved position columns as a single array.

KeepCol keeps the value of a column (e.g. the photon position) at every step of the simulation. This function reformats that list of columns for use graphical display programs. Note that format_positions will only work for columns that store data in homogeneous coordinates, for all other cases, simply call numpy.asanyarray on your KeepCol object.

Parameters

atolfloat or None

Sometimes several consecutive elements record identical photon positions in keepcol. Those are removed from the output to speed up rendering in 3D programs. atol sets the limit up to which two positions are considered identical. See np.allclose for a detailed description of atol. Set to None to skip this step.

Returns

posnp.array

Array of shape (N, n, 3), where N is the number of photons and n the number of unique photon positions in euclidean coordinates.