终端叶节点圆

Question

这是一个后续问题这。

代码：

\documentclass[12pt]{article}
\usepackage{istgame}
\usepackage{tikz}
\usetikzlibrary{shapes,arrows.meta, positioning}

\begin{document}    
    \begin{center}
        \begin{istgame}
            \setistNewNodeStyle{max}
            [regular polygon, regular polygon sides = 3]{1.5cm}
            \setistNewNodeStyle{min}
            [regular polygon, regular polygon sides = 3, shape border rotate = 180]{1.5cm}
            \setistNewNodeStyle{chance}
            [circle]{1.2cm}
            %\xtShowTerminalNodes[box node, minimum size = 1cm]
            \def\distFactor{20};
            \xtdistance{\distFactor mm}{4*\distFactor mm}
            \setxtarrowtips[blue, thick]
            \istroot(0)[max]<center, blue>{1.5}
            \istb[blue, ->-] \istb \endist
            \xtdistance{\distFactor mm}{2*\distFactor mm}
            \istroot(1)(0-1)[chance]<center, purple>{1.5}
            \istb{0.5}[al] \istb{0.5}[ar] \endist
            \istroot(2)(0-2)[chance]<center, purple>{$\leq 1$}
            \istb{0.5}[al] \istb{0.5}[ar] \endist
            \xtdistance{\distFactor mm}{\distFactor mm}
            \istroot(3)(1-1)[min]<center, red>{2}
            \istb{}{2} \istb{}{5000}[[circle, draw, yshift = 2pt, minimum size = 0.75cm] below] \endist
            \istroot(4)(1-2)[min]<center, red>{1}
            \istb{}{1} \istb{}{100}[[circle, draw, yshift = 2pt, minimum size = 0.75cm] below] \endist
            \istroot(5)(2-1)[min]<center, red>{0}
            \istb{}{0} \istb{}{2}[[circle, draw, yshift = 2pt, minimum size = 0.75cm] below] \endist
            \istroot(6)(2-2)[min]
            \istb{}{-1}[[circle, draw, yshift = 2pt, minimum size = 0.75cm] below] \istb{}{0}[[circle, draw, yshift = 2pt, minimum size = 0.75cm] below] \endist
        \end{istgame}
    \end{center}
\end{document}

输出：

minimum size是解决方案的一部分，但是有没有办法将终端值与最大圆内的值对齐？（请注意，为了获得此输出，终端值列出不正确）

Answer 1

其中一种方法是使用\xtShowEndPoints后跟xtShowTerminalNodes：

\documentclass[12pt,border=2pt]{standalone}
\usepackage{istgame}
%\usepackage{tikz}
%\usetikzlibrary{shapes,arrows.meta, positioning}

\begin{document}    

\begin{istgame}
\setistNewNodeStyle{max}
  [regular polygon, regular polygon sides = 3]{1.5cm}
\setistNewNodeStyle{min}
  [regular polygon, regular polygon sides = 3, shape border rotate = 180]{1.5cm}
\setistNewNodeStyle{chance}
  [circle]{1.2cm}
\def\distFactor{20};
\xtdistance{\distFactor mm}{4*\distFactor mm}
\setxtarrowtips[blue, thick]
\istroot(0)[max]<center, blue>{1.5}
  \istb[blue, ->-] 
  \istb 
  \endist
\xtdistance{\distFactor mm}{2*\distFactor mm}
\istroot(1)(0-1)[chance]<center, purple>{1.5}
  \istb{0.5}[al] 
  \istb{0.5}[ar] 
  \endist
\istroot(2)(0-2)[chance]<center, purple>{$\leq 1$}
  \istb{0.5}[al] 
  \istb{0.5}[ar] 
  \endist
%% terminal nodes with or without circles (TRICK!!)
\xtShowEndPoints[circle,draw,minimum size=1.1cm] % comes before \xtShowTerminalNodes
\xtShowTerminalNodes[circle,draw=none,minimum size=1.1cm]
\xtdistance{\distFactor mm}{\distFactor mm}
\istroot(3)(1-1)[min]<center, red>{2}
  \istbt{}{2}[center]   %
  \istb{}{5000}[center] 
  \endist
\istroot(4)(1-2)[min]<center, red>{1}
  \istbt{}{1}[center]   %
  \istb{}{100}[center] 
  \endist
\istroot(5)(2-1)[min]<center, red>{0}
  \istbt{}{0}[center]   %
  \istb{}{2}[center] 
  \endist
\istroot(6)(2-2)[min]
  \istb{}{-1}[center] 
  \istb{}{0}[center] 
  \endist
\end{istgame}

\end{document}