合并路径，然后再将其复制

Question

您的路径太复杂，无法合并。由于实际显示的路径部分使用剪辑定义，因此合并路径的结果可能并不完全符合您的要求。关键是剪辑不是在构建路径时应用，而是在渲染路径时应用。因此，如果您保存一条路径以便稍后将其与另一条路径合并，则该剪辑在保存的路径中不会很明显。

因此，要利用该double键来实现您想要的效果，您需要定义路径而不是使用剪辑。但是一旦您这样做了，您很可能会发现，您可以简单地将要组合的路径放在一个\draw命令中，从而在定义时将它们组合起来。

另一种选择（我在评论中提到过）是简单地绘制两次图片，一次用粗黑线，一次用细白线。这相对简单 - 这是执行此操作的代码的修改。如您所见，它需要进行一些调整：我选择的线条粗细意味着您的剪辑应该略作修改。为此，我将代码分成两半，以便只有应该加倍的位才会加倍（当然，我可能错了）。

关于你的“奖励”问题，装饰路径的自动机似乎不能后退。因此，为了将字母挤在一起，必须阻止它向前移动太多。自动机所做的是：测量下一个字母，向前移动一半长度，排版字母，向前移动一半长度，可能增加额外的移位。额外的移位已经在 0pt，因此变化的空间在于移位。我所做的是放入一个代码来修改它，以便它向前移动X乘以其长度。这可能不是正确的方法，但却是最简单的方法。

代码如下：

\documentclass[11pt]{article}
%\url{http://tex.stackexchange.com/q/67746/86}
\usepackage{tikz}
\usetikzlibrary{decorations.text,decorations.shapes,calc}

\usepackage{fontspec,xltxtra,xunicode}
\defaultfontfeatures{Mapping=tex-text}
\setromanfont[Mapping=tex-text]{Calibri}


\tikzset{
  reverseclip/.style={
    insert path={(current page.north east) --
      (current page.south east) --
      (current page.south west) --
      (current page.north west) --
      (current page.north east)}
  }
}

\thispagestyle{empty}

% Andrew Stacey's workaround for the foreach bug
\makeatletter

\def\tikz@clear@foreach{%
\let\pgffor@beginhook=\pgfutil@empty
\let\pgffor@endhook=\pgfutil@empty
\let\pgffor@afterhook=\pgfutil@empty
}

\def\tikz@plot@expression(#1){%
  \edef\tikz@plot@data{\noexpand\tikz@clear@foreach\noexpand\pgfplotfunction{\expandafter\noexpand\tikz@plot@var}{\tikz@plot@samplesat}}%
  \expandafter\def\expandafter\tikz@plot@data\expandafter{\tikz@plot@data{\tikz@scan@one@point\pgfutil@firstofone(#1)}}%
  \tikz@@@plot%
}

\pgfkeys{
  /pgf/decoration/squeeze text/.code={%
    \expandafter\g@addto@macro\csname pgf@decorate@@text along path@after typeset@options\endcsname{,width=+#1\wd\pgf@lib@dec@text@box}%
    \expandafter\g@addto@macro\csname pgf@decorate@@text along path@before typeset@options\endcsname{,width=+#1\wd\pgf@lib@dec@text@box}%
  }
}


% #1 number of teeths
% #2 radius intern
% #3 radius extern
% #4 angle from start to end of the first arc
% #5 angle to decale the second arc from the first 

\newcommand{\gear}[5]{%
\draw[rotate=-4] (0:#2)
\foreach \i in {1,...,#1} {%
  {[rotate=(\i-1)*360/#1] -- (0:#2)  arc (0:#4:#2) {
             -- (#4+#5:#3)  arc (#4+#5:360/#1-#5:#3)}}
} -- cycle;}


\newcommand{\drawlogo}[1]{%
\begin{tikzpicture}[remember picture,overlay,bronze/.style={#1}]
\useasboundingbox (-3,-2.5) rectangle (4,2.5); 
\begin{pgfinterruptboundingbox} % To make sure our clipping path does not mess up the placement of the picture
% The small disk at center will stay white (first inverse clip selection)
\path[clip] circle (0.715) -- cycle [reverseclip]; 
\end{pgfinterruptboundingbox}

% Both curves that cut the gear
\draw[bronze] (175:1.33) .. controls +(-5:2) and +(186:0.2) .. (6:2);
\draw[bronze] (185:1.33) .. controls +(-5:2) and +(186:0.2) .. (-9:2);

\begin{pgfinterruptboundingbox}
% The arrow will cover the gear (second inverse clip selection)
\path[clip] (175:1.25) arc (175:185:1.25) .. controls +(-5:2) and +(186:0.2) .. (-7.47:2.1) arc (-7.47:5.1:2.1) .. controls +(186:0.2) and +(-5:2) .. (175:1.33) -- cycle [reverseclip];
\end{pgfinterruptboundingbox}

% The gear, and the smallest circle
%\gear{14}{1.05}{1.25}{10.5}{2}
\draw[bronze] circle (0.75);

% Thick circles with the text
\draw[bronze] circle (1.33) circle (2);
%\draw[decorate,decoration={shape sep=5mm,text along path,raise=1.5mm,text={|\fontsize{16.5}{16.5}\selectfont|PROLOGIN 2013||}}] (172:1.33) arc (172:8:1.33);

% Arrow tips
\draw[bronze] (10.5:2) .. controls +(-5:0.3) and +(185:0.3) .. (6:3.8) .. controls +(0,-0.2) and +(0.2,0) .. (-20:2);

% Beginning of arrow
\draw[bronze] (168:2) .. controls +(190:0.36) and +(175:0.36) .. (175:2);
\draw[bronze] (162:2) .. controls +(190:0.7) and +(175:0.7) .. (180:2);

\end{tikzpicture}%
}
\newcommand{\decoratelogo}{%
\begin{tikzpicture}[remember picture,overlay]
\useasboundingbox (-3,-2.5) rectangle (4,2.5); 
\begin{pgfinterruptboundingbox} % To make sure our clipping path does not mess up the placement of the picture
% The small disk at center will stay white (first inverse clip selection)
\path[clip] circle (0.715) -- cycle [reverseclip]; 
% The arrow will cover the gear (second inverse clip selection)
\path[clip] (175:1.25) arc (175:185:1.25) .. controls +(-5:2) and +(186:0.2) .. (-7.47:2.1) arc (-7.47:5.1:2.1) .. controls +(186:0.2) and +(-5:2) .. (175:1.33) -- cycle [reverseclip];
\end{pgfinterruptboundingbox}

% The gear
\gear{14}{1.05}{1.25}{10.5}{2}

\draw[decorate,decoration={shape sep=5mm,text along path,squeeze text=.4,raise=1.5mm,text={|\fontsize{16.5}{16.5}\selectfont|PROLOGIN 2013 ||}}] (172:1.33) arc (172:8:1.33);

\end{tikzpicture}%
}

\begin{document}
\drawlogo{line width=6pt,black}%
\drawlogo{line width=2pt,white}%
\decoratelogo
\end{document}

（其他细微修改：将定义移至之前\begin{document}并更改\tikzstyle为\tikzset）

结果：

双线标志

我意识到这并没有完全回答你关于组合路径的问题。如果你真的想通过组合路径来实现这一点，那么正如我上面所说，你需要改变你定义图片的方式。所以如果你想要一个使用组合路径的解决方案，找出重新定义并相应地编辑问题。

我希望我所做的能够帮助您完成绘图的下一步。

Answer 1