Akababa's profile - activity

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2022-09-16 17:38:43 +0200	received badge	● Popular Question (source)
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2017-07-07 15:40:01 +0200	answered a question	frozenset error when plotting polytopes: bug? I noticed that if you use Polyhedron(ngon.vertices_list()).plot() instead, it usually works.
2017-06-29 04:48:40 +0200	commented answer	Animate rotating polytope Thanks? Btw where can I find a list of all plot arguments?
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2017-06-27 10:55:06 +0200	asked a question	Animate rotating polytope Hello, I'm trying to save an animation of a rotating polytope as a gif. So far the best I have is this: `n=49 t = (2pi/n).n() M=matrix([[cos(t),0,sin(t)],[0,1,0],[-sin(t),0,cos(t)]]) p=polytopes.cube() vl = [v[:3] for v in p.vertices()] sf = [p] for i in range(n): vl = [Mv for v in vl] sf.append(Polyhedron(vl)) s=animate(sf) s.gif(savefile="an.gif")` which outputs this: https://media.giphy.com/media/3o7bufpi3S8f1dnlNm/giphy.gif (image description) media.giphy.com/media/3o7bufpi3S8f1dnlNm/giphy.gif (Sorry, I need more karma to post links) My questions: 1. how can I get the axes to stay constant so it looks more like a rotating object? 2. Is there a faster/cleaner way to do this?
2017-06-14 22:12:49 +0200	commented question	Polyhedron.volume() ZeroDivisionError For some reason this site won't let me format the first code block
2017-06-14 02:52:55 +0200	asked a question	Polyhedron.volume() ZeroDivisionError Let us consider the following function `def vol(c): S = [g * c for g in G] return Polyhedron(S).volume() vol(vector([1.1,0.1,1]))` Here, G is the list of rotation matrices in SO(3) corresponding to the octahedral symmetry group. However when I try to run this code it gives a ZeroDivisionError. Can I do anything to fix it? It seems to work for all integer vectors but fails on most random RDF vectors. Code to generate G: G = [ matrix( ((0, 0, -1), (-1, 0, 0), (0, 1, 0)) ), matrix( ((-1, 0, 0), (0, 0, 1), (0, 1, 0)) ), matrix( ((0, 1, 0), (0, 0, -1), (-1, 0, 0)) ), matrix( ((-1, 0, 0), (0, 0, -1), (0, -1, 0)) ), matrix( ((0, 0, 1), (1, 0, 0), (0, 1, 0)) ), matrix( ((1, 0, 0), (0, -1, 0), (0, 0, -1)) ), matrix( ((0, 0, 1), (-1, 0, 0), (0, -1, 0)) ), matrix( ((1, 0, 0), (0, 1, 0), (0, 0, 1)) ), matrix( ((0, 1, 0), (0, 0, 1), (1, 0, 0)) ), matrix( ((0, -1, 0), (0, 0, -1), (1, 0, 0)) ), matrix( ((0, -1, 0), (0, 0, 1), (-1, 0, 0)) ), matrix( ((0, 0, -1), (0, -1, 0), (-1, 0, 0)) ), matrix( ((0, 1, 0), (1, 0, 0), (0, 0, -1)) ), matrix( ((0, -1, 0), (-1, 0, 0), (0, 0, -1)) ), matrix( ((0, 0, -1), (1, 0, 0), (0, -1, 0)) ), matrix( ((-1, 0, 0), (0, -1, 0), (0, 0, 1)) ), matrix( ((1, 0, 0), (0, 0, -1), (0, 1, 0)) ), matrix( ((0, 0, 1), (0, 1, 0), (-1, 0, 0)) ), matrix( ((0, 1, 0), (-1, 0, 0), (0, 0, 1)) ), matrix( ((-1, 0, 0), (0, 1, 0), (0, 0, -1)) ), matrix( ((0, -1, 0), (1, 0, 0), (0, 0, 1)) ), matrix( ((1, 0, 0), (0, 0, 1), (0, -1, 0)) ), matrix( ((0, 0, 1), (0, -1, 0), (1, 0, 0)) ), matrix( ((0, 0, -1), (0, 1, 0), (1, 0, 0)) ) ]