Introduction

This section provides an overview over all GammaLib modules and their C++ classes, with particular emphasis on the relation between the classes and their basic functionalities. It describes the purpose of all C++ classes and their primary usage, as well as their underlying arithmetics. However, we do not provide a detailed description of the interface and the inner workings of each C++ class. This information is provided in the reference documentation, which can be found online at http://cta.irap.omp.eu/gammalib/doxygen/, or which can be installed locally on your machine.

Each GammaLib module is presented in a dedicated section, following the overview shown in this figure from the top-left to the bottom right. Instrument specific modules are described in a dedicated chapter (see Instrument modules). All C++ classes of a module and their relations are illustrated using a UML diagram.

To explain how to read such a diagram, we show an example for five fictive classes in the figure below. Our example shows a container class that contains an arbitrary number of elements which are realized by an abstract base class. Names of abstract base classes are indicated in italic to highlight the fact that such classes can not be instantiated. The possible number of elements that may be held by the container (in this case any number) is indicated by the cardinality 0..* situated next to the abstract base class. Our example shows also two derived classes that inherit from the abstract base class. The second derived class is associated with a single element of some other class, indicated by the cardinality 1 next to the class. This other class is not part of the actual module, and is thus shown in grey with a dotted boundary.

UML usage