View-Based Animation

ABSTRACT We present a technique for animating objects that is based on the concept of viewpoint rather than on time. Object properties are computed as a function of the viewpoint. The viewpoint, in turn, is controlled manually or is programmed to change as a function of time. This allows objects in a flythrough or zooming interface to be animated selectively. The speed of the animation is controlled by the viewer, and the animation can be run forwards or backwards and can be stopped, started and stepped by manipulating the view controls. This technique is not intended to replace timebased animation, but is rather to be used in special cases or in conjunction with time-based animation

Technical Report: TeraGrid eXtreme Digital Campus Cyberinfrastructure and Campus Bridging Requirements Elicitation Meeting

In an effort to systematically investigate requirements for TeraGrid XD, the XROADS collaboration held during 2009 a series of requirements elicitation meetings (REM) with small groups of stakeholders. This report summarizes the conduct of and results from a requirements elicitation meeting on the topics of campus bridging and campus cyberinfrastructure. The meeting’s goal was to develop a clearer and more functional definition of what the next phase of the TeraGrid should do to be a resource broadly useful to and used by university and college campuses throughout the US.This report depends very much on the prior involvement of several XROADS partners in the TeraGrid, which has been funded in part by the NSF via the following grant awards: 0504086, 0503697, and 0742145 to the University of Chicago; 0451237 and 0504075 to Indiana University; and 0122272, 0332113, 0451566, 0503944, 0910847 to the University of California San Diego