Common Interactive Behavior In The Vrml Multi-user Environment

With the wide use of WWW, more and more people have realized that the development of WWW based on HTML is not perfect, especially on the support to multimedia. Because of the fast development of Virtual Reality, Computer Graphics and technology of web, three-dimensional space is also being imported into the Internet. As a result, web no longer centered on page. Now, web is an interactive, 3D, vivid world. This is the second-generation Web technology. And the core is the Virtual Reality Modeling Language (VRML). So the development of 3D environment on Internet in which people can interact is the main research aspect in computer application and development.In this passage, I first introduce the demand and primary technology in a prototyping system based on multi-user VRML virtual space. This system is developed by ourselves. In this part, mainly describe the history, present status, brief design technology of VRML and support by EAI kit in java to VRML.Then we discuss the main design technology in multi-user VRML virtual space in detail including CSCW (Computer-Supported Cooperative work), architecture in cooperative work environment, construct users' communication packet, interactive appreciable technology, concurrent control, TCP/IP protocol and so on. We also research the architecture of the multi-user environment.In the following part, we discuss the most important part of the program (communicating mechanism, construction of the virtual environment).Using the technology we have mentioned above, we have successfully developed the archetypal architecture of multi-user VRML virtual space.