ABSTRACT
The name GECO is taken from the first letters of the words 'GEometric Construction'. It is a PC modeling software for the geometric description of objects in three-dimensional Euclidean space E3 by means of a special geometric language. It is possible to
• define one-, two-and three-dimensional objects,
• connect geometric objects by names (CSG-tree),
• compute boundaries of Boolean operations and convex hulls,
• store sequentially in terms of a hybrid representation and
• display geometric objects using hidden line algorithms.
