Graphics Systems PHIGS and PHIGS+

The PHIGS (Programmer's Hierarchical Interactive Graphics System) is an international ISO standard of a functional interface between an application program and a configuration of graphical input and output devices. This interface contains basic functions for dynamic interactive 2D and 3D graphics on wide variety of graphics equippment

Creating virtual worlds using adapting XML

This paper deals with two aspects of virtual world creation – consistency of data and isolation of independent concepts. These concepts include among others 3D graphics rendering, physical simulation, audio processing, or user interaction. Current systems for virtual world creation focus more on concrete concepts and less on their independence thus limiting extensibility. They usually define static core functionality that quickly becomes outdated due to the fast development in computer industry. Adapting XML on the other hand focuses on extensibility, defining rules for cooperation (data sharing) and providing mechanisms for concept isolation. This makes it suitable as the base layer for extensible virtual world languages

Communication in componentized 3D graphics multimedia systems

This paper describes two aspects of architecture of componentized systems. First, properties of the basic building blocks (acquisition and presentation components) are discussed and their critical points are identified. Second, the communication between components in the system is analyzed. Different ways of communication and different communication scenarios are evaluated. The obtained results are useful when designing a new system, enlarging current systems or choosing a system for particular task. The area of 3D graphics and multimedia was the main source for examples in the paper and the whole paper is oriented on applying the described principles in this area