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contouring data on a triangular grid [message #45566]

Wed, 21 September 2005 07:14

Phony Account
Messages: 14
Registered: May 2005

Junior Member

Hello group,

I have simulation data obtained on a triangular grid from an external
application that I would like to contour.

I would rather avoid gridding procedures (triangulate, trigrid),
because it will reduce the accuracy of the contours in high gradient
areas. The triangular grid is rather non-uniform, reflecting these
high gradient areas, and I would not want to throw away this data using
a uniform rectangular grid.

I am ready to dig in and write a brute force (specialized to my 2D
geometry) routine that will find the beginning of a contour at one
edge, and using the connectivity data from triangulate, follow it to
its end.

Has anyone done something like this already? Or any other pointers and
suggestions?

Many Thanks,

Mirko

PS. This newsgroup is not such a big time saver. I followed a link to
David F's site, and spent many enjoyable minutes reading about his
polar bear adventures :-)

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