An object-oriented architecture for development of integrated CAD systems is proposed and discussed. Combining “entity-relationship” paradigm and an original object-oriented approach to design, modeling and visualization, the architecture offers flexibility, extensibility and reusability enough to integrate different-purpose components and to develop complete CAD systems in essentially differen...

Graphic Design is the process of creating graphics to meet specific commercial needs based on knowledge of layout principles and esthetic concepts. This is usually an iterative trial and error process which requires a lot of time even for expert designers. This expert knowledge can be modelled, represented and used by a computer to perform design activities. This paper describes a novel approac...

The current production model for 3D scenes, inherited from the early years of computer graphics, prevents a real collaboration among the subjects involved and, as a consequence, the full exploitation of the new potentialities of the 3D media. In this scenario the content expert is only a consultant of the 3d modeler, who is directly responsible for designing the interaction model. In complex 3D...