Parametryczne modelowanie wybranych powierzchni w programie OBIEKT 1.4

The computer program OBIEKT 1.4 (Object 1.4) is a new version of this program. The previous version (l 2) was presented in the paper [5]. In the actual version, the program was modernized specially in modeling of surfaces. There are three individual types of basic surfaces defined in the program: the surface type A, type.B, type C (fig. 2). On the base of these basic surfaces is possible to prepare parametric models f6,3, a] of difficult, complicated surfaces. This method is useful, for example, in designing of some architectural structures like buildings with irregular geometry of roofs (fig. 5, 6,7).