我在围棋棋盘上画棋子新加坡金融管理局坐标(我只能通过人们在这个问题) 像这样\drawStoneFromSgfCoords{ab}
。
但是,每个图表可能有许多石头,因此,再有一个像这样的宏也是很实用的:(\drawStonesFromSgfCoords{{black, ab}, {white, cd}}
颜色通常会交替出现,但有时有一个黑色坐标列表,然后是白色坐标列表更为实用)。
这是我现在正在尝试的,尽管它不起作用(我的意思是,它确实有效,只是不使用新的宏):
\documentclass{article}
\usepackage{tikz}
% From [this answer by @DavidCarlisle](https://tex.stackexchange.com/a/708876/64441).
\newcommand\notwhite{black}
\newcommand\notblack{white}
% From [this answer by @DavidCarlisle](https://tex.stackexchange.com/a/708893/64441).
\ExplSyntaxOn
\cs_generate_variant:Nn \int_from_alph:n {e}
\newcommand\stringToCoordX[1]{
\int_from_alph:e{\use_i:nn#1}
}
\newcommand\stringToCoordY[1]{
~\int_from_alph:e{\use_ii:nn#1}
}
\ExplSyntaxOff
\newcommand{\drawStoneFromSgfCoords}[2]{
\pgfmathsetmacro{\x}{\stringToCoordX{#2} - 1}
\pgfmathsetmacro{\y}{\stringToCoordY{#2} - 1}
\draw[draw = \UseName{not#1}, fill = #1, line width = 0.1mm]
(\x * 10cm / 18, \y * 10cm / 18)
circle [radius = 0.2575cm];
node[color = white] {1};
}
% Example usage: `drawStonesFromSgfCoords{{black, ab}, {white, cd}}`
\newcommand{\drawStonesFromSgfCoords}[1]{
\foreach \coords in {#1}{
\drawStoneFromSgfCoords{{\coords}[0]}{{\coords}[1]}
}
}
\begin{document}
\begin{tikzpicture}
\pgfmathsetmacro{\step}{10 / 18}
\draw[step=\step] (0, 0) grid (10, 10);
\drawStoneFromSgfCoords{black}{ab}
\drawStoneFromSgfCoords{white}{cd}
% \drawStonesFromSgfCoords{{black, ab}, {white, cd}}
\end{tikzpicture}
\end{document}
访问或传递数组(在循环内)的正确方法是什么?
(我使用 PGF 是\foreach
因为这是我所了解的。)
答案1
我认为,通过这里的 expl 工具处理嵌套clist
(逗号分隔的列表)是一个更好的主意,因为那里已经存在处理此类列表的工具:
\documentclass{article}
\usepackage{tikz}
% From [this answer by @DavidCarlisle](https://tex.stackexchange.com/a/708876/64441).
\newcommand\notwhite{black}
\newcommand\notblack{white}
% From [this answer by @DavidCarlisle](https://tex.stackexchange.com/a/708893/64441).
\ExplSyntaxOn
\cs_generate_variant:Nn \int_from_alph:n {e}
\NewExpandableDocumentCommand{\stringToCoordX}{ m }{
\int_from_alph:e { \use_i:nn #1 }
}
\NewExpandableDocumentCommand{\stringToCoordY}{ m }{
\int_from_alph:e { \use_ii:nn #1 }
}
\ExplSyntaxOff
\newcommand{\drawStoneFromSgfCoords}[2]{
\pgfmathsetmacro{\x}{\stringToCoordX{#2} - 1}
\pgfmathsetmacro{\y}{\stringToCoordY{#2} - 1}
\draw[draw = \UseName{not#1}, fill = #1, line width = 0.1mm]
(\x * 10cm / 18, \y * 10cm / 18)
circle [radius = 0.2575cm];
}
\ExplSyntaxOn
% Example usage: `drawStonesFromSgfCoords{{black, ab}, {white, cd}}`
\NewExpandableDocumentCommand{\drawStonesFromSgfCoords}{ m }{
\clist_set:Nn \l_tmpa_clist { #1 }
\clist_map_inline:Nn \l_tmpa_clist {
\clist_set:Nn \l_tmpb_clist { ##1 }
\clist_pop:NN \l_tmpb_clist \l_tmpa_tl
\clist_pop:NN \l_tmpb_clist \l_tmpb_tl
\exp_args:Noo \drawStoneFromSgfCoords { \l_tmpa_tl } { \l_tmpb_tl }
}
}
\ExplSyntaxOff
\begin{document}
\begin{tikzpicture}
\pgfmathsetmacro{\step}{10 / 18}
\draw[step=\step] (0, 0) grid (10, 10);
%\drawStoneFromSgfCoords{black}{ab}
%\drawStoneFromSgfCoords{white}{cd}
\drawStonesFromSgfCoords{{black, ab}, {white, cd}}
\end{tikzpicture}
\end{document}
关于所用命令的一些注释(可以在L3 接口 PDF):
\clist_set:Nn \l_tmpa_clist { #1 }
将clist
(逗号分隔列表)存储在令牌变量中,以使其可访问。在示例中,{{black, ab}, {white, cd}}
存储clist
在令牌变量中\l_tmpa_clist
。\clist_map_inline:Nn \l_tmpa_clist { ... }
循环遍历clist
(存储在 token 变量中)中的每个项目并执行花括号之间的代码。在代码示例中,当前项目通过#1
(访问##1
,因为它嵌套更深一层)。\clist_pop:NN \l_tmpb_clist \l_tmpa_tl
抓取 的第一项clist
并将其存储在标记变量 (l_tmpa_tl
) 中。然后从 中删除此项clist
。\exp_args:Noo \drawStoneFromSgfCoords { \l_tmpa_tl } { \l_tmpb_tl }
首先扩展两个标记变量并将结果作为参数插入\drawStoneFromSgfCoords
。
那么,让我们一步步看看如果我们说\drawStonesFromSgfCoords{{black, ab}, {white, cd}}
:
\NewExpandableDocumentCommand{\drawStonesFromSgfCoords}{ m }{
% store {{black, ab}, {white, cd}} in \l_tmpa_clist
\clist_set:Nn \l_tmpa_clist { #1 }
% loop over items in \l_tmpa_clist
\clist_map_inline:Nn \l_tmpa_clist {
% store {black, ab} in \l_tmpb_clist
\clist_set:Nn \l_tmpb_clist { ##1 }
% store black in \l_tmpa_tl and remove item from clist
\clist_pop:NN \l_tmpb_clist \l_tmpa_tl
% store ab in \l_tmpb_tl and remove item from clist
\clist_pop:NN \l_tmpb_clist \l_tmpb_tl
% expand \l_tmpa_tl and \l_tmpb_tl so that we get
% \drawStoneFromSgfCoords{black}{ab}
\exp_args:Noo \drawStoneFromSgfCoords { \l_tmpa_tl } { \l_tmpb_tl }
% repeat this loop for the next item in the clist in \l_tmpa_clist
}
}