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James McCrae, Igor Mordatch, Michael Glueck, Azam Khan
ACM Symposium on Interactive 3D Graphics
Multiscale 3D Navigation (4:21 min.)
Video title (x:xx min.)
We present a comprehensive system for multiscale navigation of 3-dimensional scenes, and demonstrate our approach on multiscale datasets such as the Earth. Our system incorporates a novel imagebased environment representation which we refer to as the cubemap. Our cubemap allows consistent navigation at various scales, as well as real-time collision detection without pre-computation or prior knowledge of geometric structure. The cubemap is used to improve upon previous work on proximal object inspection (HoverCam), and we present an additional interaction technique for navigation which we call look-and-fly. We believe that our approach to the navigation of multiscale 3D environments offers greater flexibility and ease of use than mainstream applications such as Google Earth and Microsoft Virtual Earth, and we demonstrate our results with this system.
While advances in computing have empowered users to design and interact with objects in virtual three-dimensional space, little effort has been made to improve or facilitate interaction with the viewpoint. Once we begin to consider this problem, we find that it effectively spans a huge problem domain with many special cases. It touches on many of the fundamental difficulties in 3D interaction: being inside an object vs. being outside, how close is the viewpoint to the object, what is the user looking at and/or is interested in, egocentric vs. exocentric thinking, parallel vs. perspective viewing projections, multiscale and level-of-detail issues, what kind of data is being examined (abstract, incomplete, photoreal, engineering, CAD, entertainment, medical, simulation, etc.), and what is the user task (authoring, inspecting, etc.). Additional technical issues include correct handling of the clipping planes and floating-point precision problems. To help understand and address some of these issues, we have an ongoing research program to improve the state-of-the-art in 3D navigation.
Designing user interfaces for interacting with 3D data involves a number of factors that are not found in traditional 2D interfaces. In this project, we explore subtle yet critical aspects of 3D control and feedback. A number of research outcomes have been integrated into several Autodesk products and we continue to explore this complex area.
This project investigates the properties and qualities of multiscale datasets in an effort to gain critical insights needed, in user experience and understanding, to make progress in increasingly complex contexts.