From: Aditya Mahajan <adityam@umich.edu>
To: mailing list for ConTeXt users <ntg-context@ntg.nl>
Subject: Re: supp-ran.lua makes code unable to work in ConTeXt
Date: Fri, 1 May 2020 17:38:31 -0400 (EDT) [thread overview]
Message-ID: <nycvar.YAK.7.77.849.2005011734580.196463@nqv-guvaxcnq> (raw)
In-Reply-To: <6c7d66fc-848b-4c24-b78d-13932d052c41@xs4all.nl>
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On Fri, 1 May 2020, Hans Hagen wrote:
> On 5/1/2020 6:12 AM, Jairo A. del Rio wrote:
>> I've adapted the following code to make mazes in LuaLaTeX and ConTeXt:
>> https://www.rosettacode.org/wiki/Maze_generation#Lua
>>
>> I defined a modified version to make content visible to TeX and I saved in
>> a file named maze.lua:
>>
>> function make_maze_tex(w, h, m)
>> w = w or 16
>> h = h or 8
>>
>> local map = initialize_grid(w*2+1, h*2+1)
>>
>> function walk(x, y)
>> map[y][x] = false
>>
>> local d = { 1, 2, 3, 4 }
>> shuffle(d)
>> for i, dirnum in ipairs(d) do
>> local xx = x + dirs[dirnum].x
>> local yy = y + dirs[dirnum].y
>> if map[yy] and map[yy][xx] then
>> map[avg(y, yy)][avg(x, xx)] = false
>> walk(xx, yy)
>> end
>> end
>> end
>>
>> walk(math.random(1, w)*2, math.random(1, h)*2)
>>
>> ...ext/tex/texmf-context/tex/context/base/mkiv/supp-ran.lua:30: C stack
>> overflow
>> Why does it happen? I guess it has something to do with math.randomseed,
>> but I don't know how to avoid this error message.
> no, it's just lua running out of stack space so it depends on the binary
> (and als the initial random value)
But why is it running out of stack? Isn't the walk function tail recursive, in which case it should not cause a stack overflow (https://www.lua.org/pil/6.3.html).
Aditya
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next prev parent reply other threads:[~2020-05-01 21:38 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-01 4:12 Jairo A. del Rio
2020-05-01 13:21 ` Hans Hagen
2020-05-01 21:38 ` Aditya Mahajan [this message]
2020-05-01 22:25 ` Hans Hagen
2020-05-02 3:05 ` Aditya Mahajan
2020-05-02 3:17 ` Aditya Mahajan
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