The -r switch

• Refines a previously generated triangulation.
• The triangulation is read from a .node and an .ele file. If -p is also used, a .poly file is read and used to constrain segments in the triangulation. If -a is used (with no number following), an .area file is read and used to impose area constraints on the triangulation.
• The iteration number of the new triangulation is one greater than that of the old triangulation.