Extracting feature lines from 3D unstructured grids
Kwan‐Liu Ma, Victoria Interrante · 1997
This paper discusses techniques for extracting feature lines from three-dimensional unstructured grids. Our twin objectives are to facilitate the interactive manipulation of these typically very large and dense meshes, and to clarify the visualization of the solution data that accompanies them. We describe the perceptual importance of specific viewpoint-dependent and view-independent features, discuss the relative advantages and disadvantages of several alternative algorithms for identifying these features (taking into consideration both local and global criteria), and demonstrate the results of these methods on a variety of different data sets. 1. INTRODUCTION The three-dimensional unstructured grids used for the numerical simulation of 3D flow are generally very large in size and irregular in both shape and resolution. Even the simplest renderings of many of these meshes can be timeconsuming to generate on an average desktop workstation, and once an image is produced it can be dif...