GVU Technical Report Number:
GIT-GVU-98-31
Title:
Third-Person Navigation of Whole-Planet Terrain in a Head-tracked
Stereoscopic Environment
Authors:
Zachary Wartell
William Ribarsky
Larry F. Hodges
Abstract:
Navigation and interaction in stereoscopic virtual environments with
head-tracking for very large data sets present several challenges beyond
those encountered with smaller or monoscopic data sets. First, zooming by
approaching or retreating from a target must be augmented by integrating
scale as a seventh degree of freedom. Second, in order to maintain good
stereoscopic imagery, the interface must: maintain stereo image pairs
that the user perceives as a single 3D image, minimize loss of perceived
depth since stereoscopic imagery cannot properly occlude the screen's
frame, provide maximum depth information, and place objects at distances
where they are best manipulated. Finally, the navigation interface must
work when the environment is displayed at any scale. This paper addresses
these problems for god's-eye-view or third person navigation of a
specific large-scale virtual environment: a high-resolution terrain
database covering an entire planet.
Keywords:
Virtual reality, virtual workbench, semi-immersive, navigation, stereoscopic
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