frozenset error when plotting polytopes: bug?

mf
161 ●5 ●11 ●20

5311 ●4 ●44 ●118

I am having trouble understanding an error I get, when i try the following:

ngon=polytopes.regular_polygon(122).dilation(18.1)
ngon.plot()

It says: KeyError: (frozenset([60]), frozenset([60])) The following works:

ngon=polytopes.regular_polygon(122).dilation(17.9)
ngon.plot()

What is going on? Is this a bug?

Comments

i can reproduce this. If it helps you for the moment ngon=polytopes.regular_polygon(122).dilation(181/10) works.

marv ( 2014-02-02 09:07:53 +0100 )edit

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Volker Braun
3301 ●11 ●30 ●75

We don't have an arbitrary precision polytopes, so sooner or later numerical errors in floating point numbers will give you the wrong answer.

Akababa
41 ●2 ●5

I noticed that if you use Polyhedron(ngon.vertices_list()).plot() instead, it usually works.

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