Here is a list of all documented files with brief descriptions:

[detail level 123]

include
viewshed
abstractlos.h
abstractviewshed.h
abstractviewshedalgorithm.h
cellevent.h
celleventposition.h
constants.h
enums.h
inverselos.h
inverseviewshed.h
los.h
losevaluator.h
losimportantvalues.h
losnode.h
point.h
rasterposition.h
threadtasks.h
viewshed.h
viewshed_export.h
viewshedtypes.h
viewshedutils.h
viewshedvalues.h
visibility.h
visibilityalgorithms.h
visibilityangledifferencetoglobalhorizon.h
visibilityangledifferencetolocalhorizon.h
visibilityboolean.h
visibilitydistanceglobalhorizon.h
visibilitydistancelocalhorizon.h
visibilityelevationdifference.h
visibilityelevationdifferencetoglobalhorizon.h
visibilityelevationdifferencetolocalhorizon.h
visibilityfuzzy.h
visibilityhorizons.h
visibilityhorizonscount.h
visibilityslopetoviewangle.h
visibilityviewangle.h