Avango 1.0.3

Data distribution is achieved by transparent replication of a shared scene graph among the participating processes of a distributed application. A sophisticated group communication system is used to guarantee state consistency even in the presence of late joining and leaving processes. The familiar dataflow graph found in modern stand-alone 3D-application toolkits extends nicely to the distributed case. Many toolkits for the development of stand-alone VE applications exist today. They provide the programmer with a high-level interface to represent complex geometry in a scene graph and to render that scene graph. The programmer is shielded from the details of dealing with low-level graphics and system APIs, and can concentrate on the development of the application itself. AVANGO provides programmers with the concept of a shared scene-graph, accessible from all processes forming a distributed application. Each process owns a local copy of the scene graph and the contained state information, which is kept synchronized. Our object-oriented framework allows the creation of application specific classes, which inherit these distribution properties. Furthermore, the shared scene-graph is augmented with a distributed dataflow graph. This provides the same evaluation characteristics in distributed applications as in stand-alone applications, and effectively supports the development of distributed interactive applications. In contrast to similar systems like Repo-3D (MacIntyre:1998) we focus on high-end, real-time, virtual environments like CAVEs (Cruz-Neira:1993:SSP) and Workbenches (HKP:Krueger94,HKP:Krueger95), therefore the development is based on SGI Performer (Rohlf:1994:IPH). With AVANGO, we provide a framework that combines the familiar programming model of existing stand-alone toolkits with built-in support for data distribution that is almost transparent to the application developer..

Requirements:	No special requirements
Platforms:	Linux
Keyword:	Application,  Assembler Tools,  Avango,  Development,  Distributed,  Framework,  Graph,  Programming,  Scene,  Scene Graph
Users rating:	0/10