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节点阴影额外 } 错误

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节点阴影额外 } 错误

尝试将 pgf 手册标题页代码放入自己的区域。我已复制了 nodeshadowed 的标题页代码片段，但出现错误：\nodeshadowed 有一个额外的 }。我没有看到错误。此外，我似乎很难将代码放在这里（在 mwe 之后）。但我还是尝试了。感谢您的想法。

    \documentclass[fontsize=10pt]{scrartcl}

     \usepackage[utf8]{inputenc}
     \usepackage[T1]{fontenc}
     \usepackage{lmodern}
     \usepackage[margin=1cm,a5paper]{geometry}

      \usepackage{tikz}
      \usetikzlibrary{fadings}

       \usepackage[ngerman]{babel}


      \begin{document}
          \parbox[]{\textwidth}{%

            \begin{tikzpicture}[]
              \def\nodeshadowed[#1][#2]{
                     \node[scale=2,above,#1]{\global\setbox\mybox=\hbox{#2}\copy\mybox};
                     \node[scale=2,above,#1,yscale=-1,scope fading=south,opacity=0.4] {\box\mybox};
 }
               \nodeshadowed [at={(-4,4 )},yslant=0.05] {\Huge Meli};
                \end{tikzpicture}
      }%end parbox

     \end{document}

答案1

我不知道你为什么要做所有这些\mybox事情。如果你想这样做，你可能想要按照@Sebastiano的建议定义它，即 do \newsavebox\mybox。但我不明白这有什么用。

\documentclass[fontsize=10pt]{scrartcl}

\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{lmodern}
\usepackage[margin=1cm,a5paper]{geometry}

\usepackage{tikz}
\usetikzlibrary{fadings}


\newcommand{\nodeshadowed}[2][]{
               \node[scale=2,above,#1]{#2};
               \node[scale=2,above,#1,yscale=-1,scope fading=south,opacity=0.4] 
               {#2};
}
\begin{document}
    \parbox[]{\textwidth}{%

      \begin{tikzpicture}[]
         \nodeshadowed[at={(-4,4 )},yslant=0.05]{\Huge Meli};
          \end{tikzpicture}
}%end parbox

\end{document}

在此处输入图片描述

答案2

对 mwe 进行两处修正。

1) 声明 mybox (\newbox\mybox)。感谢@Sebastiano Corr.1

2) 考虑 Tikz 中 \def 的语法。见下文 Corr.2

所以它对我来说可以用 pdflatex 编译。不幸的是，我不知道如何在此处包含生成的 pdf。

\documentclass[fontsize=10pt]{scrartcl}

\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{lmodern}
\usepackage[margin=1cm,a5paper]{geometry}
\usepackage[a5,frame,center]{crop}

\usepackage{tikz}
\usetikzlibrary{fadings,lindenmayersystems}

\usepackage[ngerman]{babel}

\begin{document}
\centering
\newbox\mybox %necessary for use in following def. Corr.1
\parbox[]{\textwidth}{%
\begin{tikzpicture}[]
   \def\nodeshadowed[#1]#2;{%syntax error in first mwe, corrected. [ and ] and ; are part of def!
                            %cmp. pgf man. 301a p.82 for a def - example. Corr.2
      \node[scale=2,above,#1]{\global\setbox\mybox=\hbox{#2}\copy\mybox};
      \node[scale=2,above,#1,yscale=-1,scope fading=south,opacity=0.4] {\box\mybox};
   }%end of \def needs no ";".
   \draw[step=.5cm,help lines] (-6,-5.5) grid (6,5.5);

   \foreach \x in {-6,...,6}
       \draw (\x cm,1pt) -- (\x cm,-1pt) node[anchor=north] {$\x$};
   \foreach \y in {-5.5,...,5.5}
       \draw (1pt,\y cm) -- (-1pt,\y cm) node[anchor=east] {$\y$};
   \draw (1pt,0 cm) -- (-1pt,0 cm) node[anchor=east] {};

   \foreach \where in {-3.5cm,3.5cm} {%
       \nodeshadowed [at={(\where,0cm)}] 
          { \tikz
            \draw [green!20!black, 
                   rotate=90,
                   l-system={rule set={F -> FF-[-F+F]+[+F-F]},
                   axiom=F, 
                   order=4,%sets the number of iterations the L-System will perform 301a p.638
                   step=1pt,
                   randomize step percent=50, 
                   angle=30,
                   randomize angle percent=5}
                  ] 
                  l-system; 
          };%end nodeshadowed
   }%end foreach

  \nodeshadowed [at={(-5,3 )},yslant=0.05] {\huge Meli};%{ and } contains the two params defined above
  \nodeshadowed [at={( 0,3.3)}]{\huge \textcolor{green!50!black!50}{\&}};
  \nodeshadowed [at={( 5,3 )},yslant=-0.05] {\huge Imo};

\end{tikzpicture}
}%end parbox
\end{document}

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