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Re: [cgal-discuss] Question about 2D alpha shapes


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  • From: Benoît Presles <>
  • To:
  • Subject: Re: [cgal-discuss] Question about 2D alpha shapes
  • Date: Tue, 14 Sep 2010 12:57:44 +0200

Actually, I understood why I got this results.

Thank you very much for your help,
Best regards,
Ben_P


Le 08/09/2010 13:56, Benoît Presles a écrit :
Hello everybody,

I compute the alpha shape (general mode) with alpha=0.111042939486815 of
the following 5 points:
0.790880293797096 0.313575592400366
0.903452349266412 0.970194553605220
0.519092678031009 0.236693624191607
0.392561838340948 0.739773369058428
0.995335700744040 0.349753091900525

Here is the segments I get (cf. "PointsImage.jpg"):
0.9035 0.9702 0.7909 0.3136
0.7909 0.3136 0.9953 0.3498
0.5191 0.2367 0.7909 0.3136
0.3926 0.7398 0.5191 0.2367
0.9035 0.9702 0.3926 0.7398
0.7909 0.3136 0.3926 0.7398
0.9953 0.3498 0.9035 0.9702

With such a value of alpha I don't understand why I get the segments
0.7909 0.3136 0.3926 0.7398
and
0.9035 0.9702 0.7909 0.3136


Thank you very much for your help,
Best Regards,
Ben_P




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