Abstract
The GEOM module is part of the AMAPmod software and consists of a 3D objects description language. Based on the MTG model, this language provides a simple and flexible mechanism to describe a hierarchical 3D scene as a collection of objects arranged into a graph structure, called Scene Graph. In addition to this module, AMAPmod includes a Viewer, which allow the user to examine the scenes he has created and to export them into various 3D file formats. This way it is possible to perform additional operations on the scenes such as ray tracing, walk through, hemispherical snapshots and so on. Although, this language has been designed to be used by non specialist and do not require strong backgrounds in 3D computer graphics, it is recommended to consult books introducing basic concepts on 3D graphics to have a better understanding. This document contains the following chapters: * The chapter 1 explains how to represent 3D scenes using AMAPmod. * The chapter 2 forms a reference to the GEOM's file formats. * The chapter 3 forms a reference to the objects available within the GEOM module.