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Hi Yi, The answer for your problem is much like the answer to John Yao. You need to use the Irregular3DSet constructor that takes a Delaunay argument, where you can construct a DelaunayCustom for a 2-d topology. Good luck, Bill ---------------------------------------------------------- Bill Hibbard, SSEC, 1225 W. Dayton St., Madison, WI 53706 hibbard@xxxxxxxxxxxxxxxxx 608-263-4427 fax: 608-263-6738 http://www.ssec.wisc.edu/~billh/vis.html
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