例如，在边上使用距离样式属性时，
\tikzstyle{flowloop} = [out=-150, in=-30, looseness=0.8, loop, distance=7*\limw]
或者
\tikzstyle{flowloop} = [out=-150,in=-30,looseness=0.8,distance=9*\limw]
我的边缘周围有过多的空白。我尝试使用 clip 和“用作边界框”，但无济于事。有没有关于如何删除它或首先不让它出现的建议？我不得不求助于使用与 TeXLive 捆绑在一起的“pdfcrop”来摆脱它。
请参阅所附代码和图片以了解我的意思。您会注意到，在我的两个底部循环的左侧和右侧有一个循环宽度的空白。
\def\limw{0.050\textwidth}
\setlength{\tabcolsep}{1pt}
\renewcommand{\arraystretch}{0.3}
\def\bug{\includegraphics[width=\limw]{graphics/icons/kbugbuster}}
\def\suser{\includegraphics[width=\limw]{graphics/icons/system-users}}
\def\hat{\includegraphics[width=\limw]{graphics/icons/applications-engineering}}
\def\patch{\includegraphics[width=\limw]{graphics/icons/text-x-patch}}
\def\source{\includegraphics[width=\limw]{graphics/icons/text-x-objchdr}}
\def\debf{\includegraphics[width=\limw]{graphics/icons/application-x-deb}}
\def\litim{%
\bug
\hat
\suser
\patch
\source
}
\def\litimt{%
\begin{tabular}{c c}
\bug & \hat \\
\suser & \patch\\
\source &
\end{tabular}
}
\def\litimp{%
\begin{tabular}{c c}
\bug & \hat\\
\suser & \patch\\
\source & \debf
\end{tabular}
}
% Define a few styles and constants
\def\blockdist{8.0*\limw}
\def\logosize{3.2em}
\tikzstyle{projects} = [draw, fill=orange!30, text width=5em,
text centered, minimum height=\logosize+0.6em,
node distance=0.5*\blockdist and \blockdist]
\tikzstyle{ecosystem} = [projects, text width=6em, fill=blue!30,
minimum height=12em, rounded corners, draw=black,dashed,
node distance=\blockdist and \blockdist]
\tikzstyle{label} = [text width=6em, text centered,
node distance=0.1*\blockdist and 0.1*\blockdist]
%\tikzstyle{flowloop} = [out=-150, in=-30, looseness=0.8, loop, distance=7*\limw]
\tikzstyle{flowloop} = [out=-150, in=-30,looseness=0.8,distance=9*\limw]%distance=8*\limw]
\pgfdeclarelayer{background2}
\pgfdeclarelayer{background1}
\pgfdeclarelayer{foreground}
\pgfsetlayers{background2,background1,main,foreground}
\begin{tikzpicture}
\node (debian) [projects] {\includegraphics[height=\logosize]{graphics/logos/DebianLogo}};
\node (derivs) [projects, node distance=5*\limw, below=of debian] {Debian derivatives};
\node (decos label) [label,below=of derivs] {Debian ecosystem};
\node (kde) [projects, above=of debian]
{\includegraphics[height=\logosize]{graphics/logos/KDELogo}};
\node(gcc) [projects, right=of kde]
{\includegraphics[height=\logosize]{graphics/logos/GCCLogo}};
\path ($ (kde)!.5!(gcc) $) node (upstr label) [label] {Upstream projects};
\node (fedora) [projects, right=of debian]
{\includegraphics[height=\logosize]{graphics/logos/FedoraLogo}};
\node (OpenBSD) [projects, right=of derivs]
{\includegraphics[height=\logosize]{graphics/logos/GentooLogo}};
\node (oecos label) [label,below=of OpenBSD] {Other ecosystems};
\begin{pgfonlayer}{background1}
\node (oecos) [ecosystem, fit={(fedora) (OpenBSD) (oecos label)}] {};
\node (decos) [ecosystem, fit={(decos label) (debian) (derivs)}] { };
\end{pgfonlayer}
\path ($ (oecos.south)!.5!(decos.south) $)+(0,-3em) node [label] (FOSS label) {FOSS Ecosystem};
\begin{pgfonlayer}{background1}
\end{pgfonlayer}
\begin{pgfonlayer}{background1}
\node (upstreams) [ecosystem,fit={(kde) (upstr label) (gcc)},minimum
height=4em] {};
\end{pgfonlayer}
\path [draw, <->] (debian) -- node {\litimp} (derivs);
\path [draw, <->] (decos.east) -- node[above] {\litim} (oecos.west);
\path [draw, <->] (decos.north |- upstreams.south) -- node {\litimt} (decos.north);
\path [draw, <->] (oecos.north |- upstreams.south) -- node {\litimt} (oecos.north);
\path [draw, ->] (decos.270) edge[flowloop]
node [pos=0.25] (lbugl) {\bug}
node [pos=0.35] {\hat}
node [pos=0.45] {\suser}
node [pos=0.55] (lpatch) {\patch}
node [pos=0.65] {\source}
node [pos=0.75] {\debf}
(decos.270);
\path [draw, ->] (oecos.270) edge[flowloop]
node [pos=0.25] {\bug}
node [pos=0.375] {\hat}
node [pos=0.50] {\suser}
node [pos=0.625] (lpatch) {\patch}
node [pos=0.75] (lsource) {\source}
(oecos.270);
\path [draw, ->] (upstreams.270) edge[flowloop]
node [pos=0.25] {\bug}
node [pos=0.375] {\hat}
node [pos=0.50] {\suser}
node [pos=0.625] {\patch}
node [pos=0.75] {\source}
(upstreams.270);
\begin{pgfonlayer}{background2}
\path[use as bounding box,clip] node (foss)
[ecosystem,fill=blue!50,fit=(oecos) (decos) (lpatch) (lbugl) (lsource)
(FOSS label) (upstreams)] {};
\end{pgfonlayer}
\clip (foss.north east) rectangle (foss.south west);
\end{tikzpicture}
参见下图来了解空白：
答案1
如果你将该overlay选项添加到图片中，边界框将设置为 0x0，从而消除空白。你可以通过将图片放入以下位置来亲自证明这一点\fbox：
\fbox{\begin{tikzpicture}[overlay]
...
\end{tikzpicture}}
要重新建立边界框，我认为路径上的“用作边界框”选项可以做到这一点。