TikZ:包围图形的阴影区域

TikZ: shaded area enveloping a graph

我需要绘制一个包围图形的阴影区域,如下例所示。我正在寻找自动化程序和更令人满意的结果。与示例相比,我需要更平滑的边缘和更规则的顶点(圆)和区域边界之间的距离。

在 TikZ 中绘制任意形状非常耗时,我怀疑一个聪明的技巧可能会完成这项工作,比如创建以每个顶点为中心的大重叠区域。有什么建议吗?

这里是一个最小的工作 LaTeX 代码,用于生成必须被包围的图形:

\documentclass[tikz]{standalone}
\usepackage{tikz}
\begin{document}

    \tikzstyle{vertex}=[circle,draw=black,thick]

    \begin{tikzpicture}
        \foreach \pos/\name in {{(0,1)/1}, {(1,1)/2}, {(0,0)/3}, {(1,0)/4}, {(2,0)/5}, {(1,-.7)/6}}
            \node[vertex] (\name) at \pos {};
            
        \foreach \one/\two in {{1/2}, {1/3}, {1/4}, {1/6}, {2/3}, {2/4}, {2/5}, {3/6}, {4/6}, {4/5}}
            \draw[thick] (\one) -- (\two);
    \end{tikzpicture}

\end{document}

您可以将您的节点与带有刻度线的多边形连接起来:

\documentclass[border=2mm]{standalone}
\usepackage{tikz}

\usetikzlibrary{backgrounds}

\begin{document}

    \tikzset{vertex/.style={circle,draw=black,thick}}

    \begin{tikzpicture}
        \foreach \pos/\name in {{(0,1)/1}, {(1,1)/2}, {(0,0)/3}, {(1,0)/4}, {(2,0)/5}, {(1,-.7)/6}}
            \node[vertex] (\name) at \pos {};
            
        \foreach \one/\two in {{1/2}, {1/3}, {1/4}, {1/6}, {2/3}, {2/4}, {2/5}, {3/6}, {4/6}, {4/5}}
            \draw[thick] (\one) -- (\two);
            
        
       \begin{scope}[on background layer]   
          \filldraw[lightgray,line width=20pt,rounded corners=5pt] (1.center) --  (2.center) --  (5.center) --  (4.center) --  (6.center) --  (3.center) -- cycle;
        \end{scope}
    \end{tikzpicture}

\end{document}