In the VR Modeler, an architectural building is represented
as a set of different model representations. Various
representations can be found in [Bauer et al. 2002]
and [Klaus et al. 2002]. Our approach deals with the
following three types of model representations: marker
points, marker lines and 3D point clouds. This ordering
also reflects the complexity of the geometric primitives.
The following sections give a detailed description of the
mentioned representation types.