Re: 2D vectors
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- Subject: Re: 2D vectors
- From: Luiz Henrique de Figueiredo <lhf@...>
- Date: 2014年6月11日 08:53:21 -0300
> On Wed, Jun 11, 2014 at 9:32 AM, Lars Ruoff <lars.ruoff@gmail.com> wrote:
> > is there any library or facility in Lua for working with 2D euclidean
> > vectors?
>
> There's a C extension module for 3D vectors, called lv3
>
> http://www.tecgraf.puc-rio.br/~lhf/ftp/lua/
>
> It's specifically intended as a 'learning aid', so this could be a
> useful starting point.
To use it under 5.2, you need to remove v3.lua and change lv3.c:
diff orig/lv3.c ./lv3.c
18,19c18
< if (luaL_checkudata(L,i,MYTYPE)==NULL) luaL_typerror(L,i,MYTYPE);
< return lua_touserdata(L,i);
---
> return luaL_checkudata(L,i,MYTYPE);
76c75
< static const luaL_reg R[] =
---
> static const luaL_Reg R[] =
87c86
< luaL_openlib(L,NULL,R,0);
---
> luaL_setfuncs(L,R,0);