NDLI: On the Visualization of Time-Varying Structured Grids Using a 3D Warp Texture

Content Provider	IEEE Xplore Digital Library
Author	Yuan Chen Cohen, J. Kumar, S.
Copyright Year	2004
Description	Author affiliation: Johns Hopkins University (Yuan Chen)
Abstract	We present a novel scheme to interactively visualize time-varying scalar fields defined on a structured grid. The underlying approach is to maximize the use of current graphics hardware by using 3D texture mapping. This approach commonly suffers from an expensive voxelization of each time-step as well as from large size of the voxel array approximating each step. Hence, in our scheme, instead of explicitly voxelizing each scalar field, we directly store each time-step as a three dimensional texture in its native form. We create the function that warps a voxel grid into the given structured grid. At rendering time, we reconstruct the function at each pixel using hardware-based trilinear interpolation. The resulting coordinates allow us to compute the scalar value at this pixel using a second texture lookup. For fixed grids, the function remains constant across time-steps and only the scalar field table needs to be re-loaded as a texture. Our new approach achieves excellent performance with relatively low texture memory requirements and low approximation error.
File Size	217266
File Format	PDF
ISBN	0780387880
DOI	10.1109/VISUAL.2004.74
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-10-10
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Grid computing Extrapolation Mesh generation Interpolation Lattices Data visualization Approximation algorithms Sampling methods Error analysis Root mean square
Content Type	Text
Resource Type	Article

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