Background color for tikzpicture

Question

I learned from this answer to put a background color behind existing floats without having to change the content of these existing floats.

\documentclass{article}
\makeatletter
\def\foo#1\normalcolor\vbox\bgroup#2!!{%
\def@xfloat ##1[##2]{#1%
 \normalcolor
      \hbox\bgroup{\color{yellow}\leaders\vrule\hskip\columnwidth\hskip-\columnwidth}%
      \vbox \bgroup\aftergroup\egroup
#2}}
\expandafter\foo@xfloat{#1}[#2]!!
\makeatother
\usepackage{color}
\begin{document}
\begin{figure}
a\b\c
\caption{yes no}
\end{figure}
one two three
\end{document}

But the method here doesn't work for images drawn by tikzpicture, and I wonder how to achieve the same effect for tikzpicture.

\documentclass{article}
\usepackage{tikz}
\begin{document}
\thispagestyle{empty}
\usetikzlibrary{calc}
\begin{tikzpicture}
\coordinate (center) at (3,3);
\coordinate (1) at (0,0);
\coordinate (2) at (5, .5);
\coordinate (3) at ($(center) +(30:2)$);
\coordinate (4) at ($(center) +(70:2)$);
\coordinate (5) at (0,6);
\draw[blue, dotted]
      let \p1 =  ($(3)-(center)$),
          \n0 = {veclen(\x1,\y1)}
      in (center) circle(\n0);
\filldraw[draw=black, fill=green, fill opacity=0.3]
   let \p1 = ($(3) - (center)$),
       \p2 = ($(4) - (center)$),
       \n0 = {veclen(\x1,\y1)},            % Radius
       \n1 = {atan(\y1/\x1)+180(\x1<0)},  % initial angle
       \n2 = {atan(\y2/\x2)+180(\x2<0)}   % Final angle
    in
    (1) -- (2) --  (3) arc(\n1:\n2:\n0)  -- (5)  -- cycle;
\foreach \dot in {1,2,3,4,5,center} {
  \fill (\dot) circle(2pt);
  \node[above] at (\dot) {\dot};
}
\end{tikzpicture}
\end{document}

Since I have a large number of files to work with, I would like the method to be more automated and not require me to manually insert many times. Looking forward to your answer！

Answer 1

It doesn't work because tikzpicture is not a float. If you wrap your tikzpicture in a \begin{figure}...\end{figure} float, and add the \makeatletter code, it works as your prior example.

\documentclass{article}
\usepackage{tikz}
\makeatletter
\def\foo#1\normalcolor\vbox\bgroup#2!!{%
\def@xfloat ##1[##2]{#1%
 \normalcolor
      \hbox\bgroup{\color{yellow}\leaders\vrule\hskip\columnwidth\hskip-\columnwidth}%
      \vbox \bgroup\aftergroup\egroup
#2}}
\expandafter\foo@xfloat{#1}[#2]!!
\makeatother
\begin{document}
\thispagestyle{empty}
\usetikzlibrary{calc}
\begin{figure}
\centering
\begin{tikzpicture}
\coordinate (center) at (3,3);
\coordinate (1) at (0,0);
\coordinate (2) at (5, .5);
\coordinate (3) at ($(center) +(30:2)$);
\coordinate (4) at ($(center) +(70:2)$);
\coordinate (5) at (0,6);
\draw[blue, dotted]
      let \p1 =  ($(3)-(center)$),
          \n0 = {veclen(\x1,\y1)}
      in (center) circle(\n0);
\filldraw[draw=black, fill=green, fill opacity=0.3]
   let \p1 = ($(3) - (center)$),
       \p2 = ($(4) - (center)$),
       \n0 = {veclen(\x1,\y1)},            % Radius
       \n1 = {atan(\y1/\x1)+180(\x1<0)},  % initial angle
       \n2 = {atan(\y2/\x2)+180(\x2<0)}   % Final angle
    in
    (1) -- (2) --  (3) arc(\n1:\n2:\n0)  -- (5)  -- cycle;
\foreach \dot in {1,2,3,4,5,center} {
  \fill (\dot) circle(2pt);
  \node[above] at (\dot) {\dot};
}
\end{tikzpicture}
\caption{A tikzpicture inside a float}
\end{figure}
\end{document}

Answer 2

If you want to color the background of a TikZ image you can use backgrounds library by specifying [background rectangle/.style={fill=yellow}, show background rectangle] as picture style, for example.

\documentclass[tikz, border=7mm]{standalone}
\usepackage{tikz}
\usetikzlibrary{calc, backgrounds}
\begin{document}
\begin{tikzpicture}[background rectangle/.style={fill=yellow}, show background rectangle]
    \coordinate (center) at (3,3);
    \coordinate (1) at (0,0);
    \coordinate (2) at (5, .5);
    \coordinate (3) at ($(center) +(30:2)$);
    \coordinate (4) at ($(center) +(70:2)$);
    \coordinate (5) at (0,6);
\draw[blue, dotted]
    let \p1 =  ($(3)-(center)$),
        \n0 = {veclen(\x1,\y1)}
    in (center) circle(\n0);


\filldraw[draw=black, fill=green, fill opacity=0.3]
   let \p1 = ($(3) - (center)$),
       \p2 = ($(4) - (center)$),
       \n0 = {veclen(\x1,\y1)},            % Radius
       \n1 = {atan(\y1/\x1)+180*(\x1<0)},  % initial angle
       \n2 = {atan(\y2/\x2)+180*(\x2<0)}   % Final angle
    in
    (1) -- (2) --  (3) arc(\n1:\n2:\n0)  -- (5)  -- cycle;

\foreach \dot in {1,2,3,4,5,center} {
    \fill (\dot) circle(2pt);
    \node[above right] at (\dot) {\dot};
}

\end{tikzpicture}
\end{document}