A Visualization System for Hexahedral Mesh Quality Study

TL;DR

A new 3D hex mesh visual analysis system that emphasizes poor-quality areas with an aggregated glyph, highlights overlapping elements, and provides detailed boundary error inspection in three forms is introduced.

Abstract

In this paper, we introduce a new 3D hex mesh visual analysis system that emphasizes poor-quality areas with an aggregated glyph, highlights overlapping elements, and provides detailed boundary error inspection in three forms. By supporting multi-level analysis through multiple views, our system effectively evaluates various mesh models and compares the performance of mesh generation and optimization algorithms for hexahedral meshes.

Figures (9)

• Figure 1: Visualization of the quality of a warrior hex-mesh livesu2016skeleton using the quality filtering by the HexaLab bracci2019hexalab (a), focus+context volume rendering neuhauser2021interactive (b), and our glyph-based method (c), respectively. Our method highlights places with bad-quality elements. The larger the glyphs are, the worse the element quality is.
• Figure 2: The aggregated glyphs (b) reduce the clutter of non-aggregated glyphs (a).
• Figure 3: Two different overlapping situations may arise (2D illustration): (a) overlapping vertices caused by degenerated edges, (b) overlapping quads caused by one vertex falling inside another quad. Existing visualization (left image of each pair) cannot effectively highlight the overlapping in either case. In contrast, we use arrow(s) to intuitively direct the viewers toward places with overlap (right image of each pair).
• Figure 4: The multi-view interface of our system for the level-of-detail inspection of mesh element quality.
• Figure 5: A multi-view interface for the boundary error visualization of a hand hex-meshing.