Expose Scanner function to set beam quality to pyhelios

[lwiniwar]

We should expose the getter and setter for the number of subrays (actually, beamSampleQuality) to pyhelios. I am also wondering about the function Scanner.setNumRays(int) - is that not rather calculated from the beamSampleQuality? BeamQuality is something else than beamSampleQuality.

Please clarify these parameters and rename them if appropriate. Thanks!

[lwiniwar]

I see that there is a numRays property here: https://github.com/3dgeo-heidelberg/helios/blob/a122d6d7e8cafa70781681e7d8f895dff9add439/src/pybinds/PyHelios.cpp#L439

However, setting the number of rays directly should not be supported. Instead, the beamSampleQuality should be set, and the number of rays calculated from that.

[han16nah]

There is a scanner.fwfSettings.beamSampleQuality property. https://github.com/3dgeo-heidelberg/helios/blob/f1835c00c76cd1b81351c5347052812ede776bde/src/pybinds/PyHelios.cpp#L688-L692

Not sure, if this will also report the correct value if the beamSampleQuality is set in the FWFSettings of the survey XML or if it will always report the value configured for the scanner (in the scanner XML or the HELIOS++ default)