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Issue No. 06 - November/December (2010 vol. 16)
ISSN: 1077-2626
pp: 1458-1467
Jürgen Waser , VRVis Vienna
Raphael Fuchs , ETH Zürich
Hrvoje Ribicic , VRVis Vienna
Benjamin Schindler , ETH Zürich
Günther Blöschl , TU Vienna
Eduard Gröller , TU Vienna
In this paper we present World Lines as a novel interactive visualization that provides complete control over multiple heterogeneous simulation runs. In many application areas, decisions can only be made by exploring alternative scenarios. The goal of the suggested approach is to support users in this decision making process. In this setting, the data domain is extended to a set of alternative worlds where only one outcome will actually happen. World Lines integrate simulation, visualization and computational steering into a single unified system that is capable of dealing with the extended solution space. World Lines represent simulation runs as causally connected tracks that share a common time axis. This setup enables users to interfere and add new information quickly. A World Line is introduced as a visual combination of user events and their effects in order to present a possible future. To quickly find the most attractive outcome, we suggest World Lines as the governing component in a system of multiple linked views and a simulation component. World Lines employ linking and brushing to enable comparative visual analysis of multiple simulations in linked views. Analysis results can be mapped to various visual variables that World Lines provide in order to highlight the most compelling solutions. To demonstrate this technique we present a flooding scenario and show the usefulness of the integrated approach to support informed decision making.
Problem solving environment, decision making, simulation steering, parallel worlds, CFD, smoothed particle hydrodynamics

E. Gröller, R. Fuchs, J. Waser, B. Schindler, G. Blöschl and H. Ribicic, "World Lines," in IEEE Transactions on Visualization & Computer Graphics, vol. 16, no. , pp. 1458-1467, 2010.
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