I.2.1 The CoordSys object

A CoordSys object corresponds to a coordinate system. CoordSys objects are generally created in a DataBase when a model is imported.

Besides the data corresponding to the definition of the coordinate system, the CoordSys object also contains a definition of the coordinate system wrt the most basic coordinate system “0”. The corresponding member data are used by functions like the Result methods of modification of reference coordinate systems to perform the transformations of components (sections I.4.6.7 and I.4.6.8). Practically those functions work in two steps:

1.

The components of the Result object are expressed wrt the basic coordinate system “0”.

2.

Then, the components are expressed wrt the new coordinate system.

The definition of the corresponding member data is done by calling the method “updateDefWrt0” (section I.2.2.3).