e_facetarea">qh_compare_facetarea</a>
used by qsort() to order facets by area </li>
<li><a href="io.c#compare_facetvisit">qh_compare_facetvisit</a>
used by qsort() to order facets by visit ID or ID </li>
<li><a href="io.c#compare_nummerge">qh_compare_nummerge</a>
used by qsort() to order facets by number of merges </li>
<li><a href="io.c#detvnorm">qh_detvnorm</a> determine normal for Voronoi ridge </li>
<li><a href="io.c#detvridge">qh_detvridge</a> determine Voronoi
ridge for an input site
<li><a href="io.c