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TetSplat: Real-time Rendering and Volume Clipping of Large Unstructured Tetrahedral Meshes

Museth, Ken and Lombeyda, Santiago (2004) TetSplat: Real-time Rendering and Volume Clipping of Large Unstructured Tetrahedral Meshes. In: IEEE Visualization, 10-15 October 2004, Austin, Texas, USA. (Unpublished)

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We present a novel approach to interactive visualization and exploration of large unstructured tetrahedral meshes. These massive 3D meshes are used in mission-critical CFD and structural mechanics simulations, and typically sample multiple field values on several millions of unstructured grid points. Our method relies on the pre-processing of the tetrahedral mesh to partition it into non-convex boundaries and internal fragments that are subsequently encoded into compressed multi-resolution data representations. These compact hierarchical data structures are then adaptively rendered and probed in real-time on a commodity PC. Our point-based rendering algorithm, which is inspired by QSplat, employs a simple but highly efficient splatting technique that guarantees interactive frame-rates regardless of the size of the input mesh and the available rendering hardware. It furthermore allows for real-time probing of the volumetric data-set through constructive solid geometry operations as well as interactive editing of color transfer functions for an arbitrary number of field values. Thus, the presented visualization technique allows end-users for the first time to interactively render and explore very large unstructured tetrahedral meshes on relatively inexpensive hardware.

Item Type:Conference or Workshop Item (Paper)
Group:Center for Advanced Computing Research
Subject Keywords:computer graphics, picture/image generation-display, computational geometry and object modeling, constructive solid geometry, computational geometry and object modeling, curve, surface, solid, and object representations, graphics data structures and data types
Record Number:CaltechCACR:2004.221
Persistent URL:
Usage Policy:You are granted permission for individual, educational, research and non-commercial reproduction, distribution, display and performance of this work in any format.
ID Code:28218
Deposited By: Imported from CaltechCACR
Deposited On:10 Feb 2006
Last Modified:03 Oct 2019 03:30

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