¿Cómo puedo hacer que el árbol del diagrama sea más perfecto?

Question

Quiero hacer este diagrama más perfecto en Beamer.

quiero ser parecido a este estilo

Alguien me puede ayudar

Usé esto para hacer este diagrama.

\forestset{
    L1/.style={fill=blue!20,},
    L2/.style={fill=blue!20,edge={black,line width=1pt}},
    L3/.style={fill=blue!20,edge={black,line width=1pt}},
    L4/.style={fill=blue!20,edge={black,line width=1pt}},
}


     \begin{forest}
     for tree={
        grow=0,reversed, % tree direction
        parent anchor=east,child anchor=west, % edge anchors
        edge={line cap=round},outer sep=+2pt, % edge/node connection
        rounded corners,minimum width=15mm,minimum height=8mm, % node shape
        l sep=18mm % level distance
     }
     [Association Scheme,L1
     [Bose and Nair,L2
     [1939,L3
     ]]
    [Bose and Shimamoto,L2
    [1952,L3
    ]]
     ]
    \end{forest}


\
   \begin{forest}
    for tree={
        grow=0,reversed, % tree direction
        parent anchor=east,child anchor=west, % edge anchors
        edge={line cap=round},outer sep=+2pt, % edge/node connection
        rounded corners,minimum width=15mm,minimum height=8mm, % node shape
        l sep=20mm % level distance
    }
    [Bose-Mesner algebra,L1
    [Bose  and Mesner,L2
    [1959,L3
    ]]
    ]
   \end{forest}

   \forestset{
    L1/.style={fill=blue!20,},
    L2/.style={fill=blue!20,edge={black,line width=1pt}},
    L3/.style={fill=blue!20,edge={black,line width=1pt}},
    L4/.style={fill=blue!20,edge={black,line width=1pt}},
   }
   \begin{forest}
    for tree={
        grow=0,reversed, % tree direction
        parent anchor=east,child anchor=west, % edge anchors
        edge={line cap=round},outer sep=+2pt, % edge/node connection
        rounded corners,minimum width=15mm,minimum height=8mm, % node shape
        l sep=20mm % level distance
    }
    [Coherent Configuration,L1
    [D. G. Higman,L2
    [1967,L3
    ]]
    ]
   \end{forest}

Answer 1

Si desea emular la estructura, debe explicar cómo el contenido de su diagrama debe asignarse a esa estructura. El bosque probablemente no sea una buena opción en ese caso.

Si desea que los nodos, las flechas, etc. se parezcan más a los de la imagen, puede intentar algo como esto:

\documentclass[dvipsnames,svgnames,x11names]{beamer}
\usepackage[edges]{forest}
\usetikzlibrary{shadows,arrows.meta}
\begin{document}
\forestset{
  my tree/.style={
    forked edges,
    for tree={
      grow'=0,
      fork sep=5mm,
      drop shadow,
      anchor=parent,
      edge={draw=DarkOrchid3, -Latex, thick},
      l sep'=7.5mm,
    },
    before typesetting nodes={
      tempcounta/.max={level()-1}{tree},
      for tree={
        top color/.wrap pgfmath arg={blue!##1!WildStrawberry!50}{((level()-1)/(tempcounta))*100)},
        bottom color/.wrap pgfmath arg={blue!##1!WildStrawberry}{((level()-1)/(tempcounta))*100)},
        draw/.wrap pgfmath arg={blue!##1!WildStrawberry}{((level()-1)/(tempcounta))*100)},
        text=white,
        tier/.wrap pgfmath arg={tier ##1}{level()},
        content/.wrap value={\strut ##1},
      }
    },
    where level=0{phantom}{},
  }
}

\begin{frame}
\begin{forest}
  my tree
  [
   [Association Scheme
   [Bose and Nair
   [1939
   ]]
  [Bose and Shimamoto
  [1952
  ]]
   ]
  [Bose-Mesner algebra
  [Bose  and Mesner
  [1959
  ]]
  ]
  [Coherent Configuration
  [D. G. Higman
  [1967
  ]]
  ]]
\end{forest}
\end{frame}

\end{document}