Here are the classes, structs, unions and interfaces with brief descriptions:

[detail level 123]

Nviewshed
Nvisibilityalgorithm
CAngleDifferenceToGlobalHorizon
CAngleDifferenceToLocalHorizon
CBoolean
CDistanceGlobalHorizon
CDistanceLocalHorizon
CElevationDifference
CElevationDifferenceToGlobalHorizon
CElevationDifferenceToLocalHorizon
CFuzzyVisibility
CHorizons
CHorizonsCount
CLoSSlopeToViewAngle
CViewAngle
CAbstractLoS	Abstract class that represent line-of-sight (LoS). Consists of LoSNodes, view point and target point (both with potential offset from the surface)
CAbstractViewshed	Abstract class that represents viewshed calculation from this class specific implementations ( Viewshed and InverseViewshed) are derived. Class provides all the base functions for those algorithms, including implementation of plane sweep algorithm for viewshed according to Van Kreveld(1996) and Haverkort et al(2007), as implemented in GRASS GIS described by Toma et al. (2022)
CAbstractViewshedAlgorithm	Base class for all Viewshed Algorithms
CCellEvent	Class representing cell events for Van Kreveld's plane sweep algorithm. Stores cell position (row and column), type of event (Enter, Center, Exit), elevation of all three points associated with given cell, distance from important point (viewpoint or target point), horizontal angle from important point
CCellEventPosition	Simple tuple representing cell event position in term of row and col (as double)
CInverseLoS	Class that represents InverseLoS, that is LoS used in Inverse Viewshed calculation
CInverseViewshed
CLoS	Class that represents LoS for classic Viewshed calculation
CLoSEvaluator	Class that takes care of analysing AbstractLoS with respect to given AbstractViewshedAlgorithms, the result can be obtained from
CLoSImportantValues	Representation of important values and LoSNode indexes that can be extracted from LoS and are important for Visibility Algorithms
CLoSNode	Representation of single cell that creates a point on LoS
CPoint	Class that represents important point for viewshed - view point, or inverse viewshed - target point. The point is specified by cell position in raster coordinates, world coordinates, elevation at point, offset from elevation and cell size
CRasterPosition	Class to represent position on raster in term of row and column
CViewshed
CDataTriplet	Representation of triplet of data. First two values are doubles and third is boolean. Used to export LoS to CSV where the values are point's distance, elevation and whether the point is target point
CViewshedUtils	Class that contains mostly static helper functions
CViewshedValues	A simple class that stores results of visibility indices calculation (in form of vector of doubles) for specific cell
CVisibility	Class that provides static functions to assist with viewshed calculation
CAbstractLoS	Abstract class that represent line-of-sight (LoS). Consists of LoSNodes, view point and target point (both with potential offset from the surface)
CAbstractViewshed	Abstract class that represents viewshed calculation from this class specific implementations ( Viewshed and InverseViewshed) are derived. Class provides all the base functions for those algorithms, including implementation of plane sweep algorithm for viewshed according to Van Kreveld(1996) and Haverkort et al(2007), as implemented in GRASS GIS described by Toma et al. (2022)
CAbstractViewshedAlgorithm	Base class for all Viewshed Algorithms
CAngleDifferenceToGlobalHorizon
CAngleDifferenceToLocalHorizon
CBoolean
CCellEvent	Class representing cell events for Van Kreveld's plane sweep algorithm. Stores cell position (row and column), type of event (Enter, Center, Exit), elevation of all three points associated with given cell, distance from important point (viewpoint or target point), horizontal angle from important point
CCellEventPosition	Simple tuple representing cell event position in term of row and col (as double)
CDataTriplet	Representation of triplet of data. First two values are doubles and third is boolean. Used to export LoS to CSV where the values are point's distance, elevation and whether the point is target point
CDistanceGlobalHorizon
CDistanceLocalHorizon
CElevationDifference
CElevationDifferenceToGlobalHorizon
CElevationDifferenceToLocalHorizon
CFuzzyVisibility
CHorizons
CHorizonsCount
CInverseLoS	Class that represents InverseLoS, that is LoS used in Inverse Viewshed calculation
CInverseViewshed
CLoS	Class that represents LoS for classic Viewshed calculation
CLoSEvaluator	Class that takes care of analysing AbstractLoS with respect to given AbstractViewshedAlgorithms, the result can be obtained from
CLoSImportantValues	Representation of important values and LoSNode indexes that can be extracted from LoS and are important for Visibility Algorithms
CLoSNode	Representation of single cell that creates a point on LoS
CLoSSlopeToViewAngle
CPoint	Class that represents important point for viewshed - view point, or inverse viewshed - target point. The point is specified by cell position in raster coordinates, world coordinates, elevation at point, offset from elevation and cell size
CRasterPosition	Class to represent position on raster in term of row and column
CViewAngle
CViewshed
CViewshedUtils	Class that contains mostly static helper functions
CViewshedValues	A simple class that stores results of visibility indices calculation (in form of vector of doubles) for specific cell
CVisibility	Class that provides static functions to assist with viewshed calculation