在 chemfig 中用单键连接楔形物

Question

有没有办法以“平滑的方式”连接 chemfig 中具有单键的楔子？

\documentclass{article}
\usepackage{chemfig}

\begin{document}
    \setchemfig{angle increment=30, bond join = true}
    \chemfig{-[-1](-[1])<[-3]-[-1]}
\end{document}

分发：

是否可以通过以下方式修剪单键处的楔形：

Answer 1

我并不是这方面的专家pgf，tikz但我找到了一个（部分）解决方案。使用修改chemfig默认值setchemfig会产生以下结果：

\documentclass{article}
\usepackage{chemfig}
\begin{document}
    \setchemfig{
         atom sep=15pt,
         cram width=3.0pt,
         cram dash width=0.75pt,
         cram dash sep=2.0pt
         bond offset=0.75pt
         bond style={line width=0.75pt}
    }
    \chemfig{-[::-30](-[::60])<[::-60]-[::60]}
\end{document}

我使用usetikzlibrary{decorations}创建自定义 Cram 键，基于@pisoir 的回答如何使用 chemfig 将双键的一部分加粗？。

\documentclass{article}
\usepackage{chemfig}
\usetikzlibrary{decorations}

\pgfdeclaredecoration{crambond1side}{initial}{%
    \state{initial}[width=\pgfdecoratedpathlength]{%
        \pgfsetfillcolor{black}
        \pgfpathlineto{\pgfpoint{0pt}{0.3pt}}
        \pgfpathlineto{\pgfpoint{1.10*\pgfdecoratedpathlength}{2pt}}
        \pgfpathlineto{\pgfpoint{0.96*\pgfdecoratedpathlength}{-2pt}}
        \pgfpathlineto{\pgfpoint{0pt}{-0.3pt}}
        \pgfusepath{fill}
    }
}
\tikzset{CramRight/.style={decorate, decoration=crambond1side}}
\tikzset{CramLeft/.style={decorate, decoration={crambond1side, mirror}}}

\pgfdeclaredecoration{crambond2sides}{initial}{%
    \state{initial}[width=\pgfdecoratedpathlength]{%
        \pgfsetfillcolor{black}
        \pgfpathlineto{\pgfpoint{0pt}{0.3pt}}
        \pgfpathlineto{\pgfpoint{1.10*\pgfdecoratedpathlength}{2pt}}
        \pgfpathlineto{\pgfpoint{\pgfdecoratedpathlength}{0pt}}
        \pgfpathlineto{\pgfpoint{1.10*\pgfdecoratedpathlength}{-2pt}}
        \pgfpathlineto{\pgfpoint{0pt}{-0.3pt}}
        \pgfusepath{fill}
    }
}
\tikzset{Cram2Sides/.style={decorate, decoration=crambond2sides}}

\begin{document}
    \setchemfig{
        atom sep=15pt,
        cram width=3.0pt, cram dash width=0.75pt, cram dash sep=2.0pt,
        bond offset=0.75pt,
        bond style={line width=0.75pt}
    }
    \chemfig{-[::-30](-[::+60])-[::-60,,,,CramLeft]-[::-60]}\quad
    \chemfig{-[::-30](-[::+60])-[::-60,,,,CramRight]-[::+60]}\quad
    \chemfig{-[::-30](-[::+60])-[::-60,,,,Cram2Sides](-[::-60])-[::60]}\quad
\end{document}

最终结果

Answer 2

这可能不是理想的解决方案，但经过一些调整后，您可能会得到与您想要的结果类似的结果。请注意，我已将 、 和 参数添加cram width到line width您shorten的代码中。

\documentclass{article}
\usepackage{chemfig}

\begin{document}
    \setchemfig{angle increment=30, bond join = true, cram width = 2.4pt}
    \chemfig{-[-1](-[1])<[-3]-[-1,,,,line width=1.5pt, shorten <=-1pt]}
\end{document}

结果是：