FindCurvePath has a problem
- To: mathgroup at smc.vnet.net
- Subject: [mg127364] FindCurvePath has a problem
- From: Ralph Dratman <ralph.dratman at gmail.com>
- Date: Fri, 20 Jul 2012 03:50:32 -0400 (EDT)
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The following input to FindCurvePath produces the output shown below it: FindCurvePath[{{278,141},{279,141},{279,142},{279,143},{280,143},{280,144}, {280,145},{280,146},{281,147},{281,148},{281,149},{281,150},{282,150},{282, 151},{282,152},{283,151},{283,152},{283,153},{284,153},{284,154},{285,155}, {286,155},{286,156},{287,156},{287,157},{288,157},{289,156},{290,156},{290, 157},{291,156},{291,157},{292,156},{292,157},{293,156},{293,157},{294,156}, {294,157},{295,156},{295,157},{296,156},{296,157},{297,156},{297,157},{298, 155},{298,156},{299,155},{299,156},{300,155},{301,154},{301,155},{302,153}, {302,154},{303,152},{303,153},{304,150},{304,151},{304,152},{305,149},{305, 150},{306,146},{306,147},(*{306,148},{306,149},{307,144},{307,145},{307,146 },{308,141},{308,142},{308,143},{308,144},{309,139},{309,140},{309,141},{31 0,138},{310,139},{311,136},{311,137},{311,138},{312,135},{312,136},{313,134 },{313,135},*){314,133},{314,134}}] FindCurvePath::ntri: The data generates an inconsistent triangulation. You can perturb the data to make it valid. >> Fail If you restore the commented-out list elements (beginning with (*{306,148}...), then evaluate, you get an apparently never-ending silent hangup, which is of course far worse than an error message. I have not yet tried to "perturb" anything to work around the problem. Clearly the function needs to check its arguments before wandering off into lala land. Ralph Dratman
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- From: Oliver Ruebenkoenig <ruebenko@wolfram.com>
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