在每个绘图的中心指定一个节点

Question

使用以下修改后的代码这个帖子

如何指定每个图形中心的节点，以便它们可以相对于彼此的中心进行绘制，而不是位置 (0,0)。

\documentclass{article}
\usepackage{tikz}
\tikzset{
  big triangle/.pic={
  \path[pic actions] (0,0) -- (2,0) -- (2,2) -- cycle;
  },
  medium triangle/.pic={
    \path[pic actions] (0,0)  -- (1,1) -- (2,0) -- cycle;  
  },
  square/.pic={
    \path[pic actions] (0,0) -- (1,0) -- (1,1) -- (0,1) -- cycle;
  },
  small triangle/.pic={
    \path[pic actions] (0,0) -- (1,0) -- (1,1) -- cycle;
  },
  parallelogram/.pic={
    \path[pic actions] (0,0) -- (1,0) -- (2,1) -- (1,1) -- cycle;
  }
  }
\tikzset{
  tangram solution/.style={
      fill=none,
    draw=red,
    line width=.1mm
  },   
  tangram/.style={
  transform shape,
    tangram solution
  }
}
\begin{document}
\hskip -2cm
\begin{tikzpicture}[scale=2]
\path (0,0) pic[tangram,rotate=0] {big triangle}
--++(0:2) pic[tangram,rotate=0] {parallelogram}
--++(0:1) pic[tangram,rotate=0] {small triangle}
--++(0:1) pic[tangram,rotate=0] {square}
--++(0:1) pic[tangram,rotate=0] {medium triangle}
;
\end{tikzpicture}
\end{document}

Answer 1

\path这里，每个中都添加了手动计算的坐标偏移pic。

\documentclass{article}
\usepackage{tikz}
\tikzset{
  big triangle/.pic={
    \path[pic actions, shift={(-4/3,-2/3)}] (0,0) -- (2,0) -- (2,2) -- cycle;
    \fill circle (1pt); % mark the "center", just for the test
  },
  medium triangle/.pic={
    \path[pic actions, shift={(-1,-1/3)}] (0,0)  -- (1,1) -- (2,0) -- cycle;  
    \fill circle (1pt);
  },
  square/.pic={
    \path[pic actions, shift={(-.5,-.5)}] (0,0) -- (1,0) -- (1,1) -- (0,1) -- cycle;
    \fill circle (1pt);
  },
  small triangle/.pic={
    \path[pic actions, shift={(-2/3,-1/3)}] (0,0) -- (1,0) -- (1,1) -- cycle;
    \fill circle (1pt);
  },
  parallelogram/.pic={
    \path[pic actions, shift={(-1,-.5)}] (0,0) -- (1,0) -- (2,1) -- (1,1) -- cycle;
    \fill circle (1pt);
  }
  }
\tikzset{
  tangram solution/.style={
      fill=none,
    draw=red,
    line width=.1mm
  },   
  tangram/.style={
  transform shape,
    tangram solution
  }
}
\begin{document}
\hskip -2cm
\begin{tikzpicture}[scale=2]
  \path (0,0) pic[tangram,rotate=0] {big triangle}
    -- ++(0:2) pic[tangram,rotate=0] {parallelogram}
    -- ++(0:1) pic[tangram,rotate=0] {small triangle}
    -- ++(0:1) pic[tangram,rotate=0] {square}
    -- ++(0:1) pic[tangram,rotate=0] {medium triangle};
\end{tikzpicture}
\end{document}