Figure 4 presents a screenshot of the desktop of a decision maker participating in a collaborative session as described in the example of Section 2. We describe a scenario of how the user gets to this display.
The decision maker starts a Java and VRML enabled Web-browser and follows a link pointing to a DIVA server. The resulting HTML file will setup the user environment. First, the user has to log in, making available her name and network address, and after that she can choose from one or more sessions to join. Once the user enters a session, she will be assigned a role and then gets a default or enforced perspective. The VRML world showing her view is embedded in the Web page. Two Java applets will contain the session interface and the collaboration interface (these are not shown in the screenshot).
With a push on a button she is able to request a remote control, which will arrive at her environment (assuming that she is allowed to do so). Once the remote control arrives in the form of a mobile object, this object pops up a remote control user interface on the display. The user is then able to control the simulation that is associated with the remote control. In Figure 4 the remote control can be used to run, stop and reset the simulation. In addition, the speed of the simulation as well as three parameters can be changed. Changes to the simulation will accordingly appear in the visualization in the browser window.