Flow diagam and 3D diagrams tikz

Question

I am trying to get to this :

I have tried this:

%CONFIGURACIÓN DEL DOCUMENTO Y HOJA
\documentclass[tikz,border=3.14pt]{standalone}
\usetikzlibrary{3d,decorations.text,shapes.arrows,positioning,fit,backgrounds}
\tikzset{pics/fake box/.style args={% #1=color, #2=x dimension, #3=y dimension, #4=z dimension
#1 with dimensions #2 and #3 and #4}{
code={
\draw[gray,ultra thin,fill=#1]  (0,0,0) coordinate(-front-bottom-left) to
++ (0,#3,0) coordinate(-front-top-right) --++
(#2,0,0) coordinate(-front-top-right) --++ (0,-#3,0) 
coordinate(-front-bottom-right) -- cycle;
\draw[gray,ultra thin,fill=#1] (0,#3,0)  --++ 
 (0,0,#4) coordinate(-back-top-left) --++ (#2,0,0) 
 coordinate(-back-top-right) --++ (0,0,-#4)  -- cycle;
\draw[gray,ultra thin,fill=#1!80!black] (#2,0,0) --++ (0,0,#4) coordinate(-back-bottom-right)
--++ (0,#3,0) --++ (0,0,-#4) -- cycle;
\path[gray,decorate,decoration={text effects along path,text={texth}}] (#2/2,{2+(#3-2)/2},0) -- (#2/2,0,0);
}
}}
% from https://tex.stackexchange.com/a/52856/121799
\tikzset{circle dotted/.style={dash pattern=on .05mm off 2mm,
                                         line cap=round}}
\begin{document}
%CONFIGURACIÓN DEL ENCABEZADO
%DESDE AQUÍ SE ESCRIBE TODO EL CONTENIDO
% \begin{abstract}
% Solution to Homework
% \end{abstract}
\begin{tikzpicture}[x={(1,0)},y={(0,1)},z={({cos(60)},{sin(60)})},
font=\sffamily\small,scale=2,roundnode/.style={circle, draw=green!60, fill=green!5, very thick, minimum size=7mm},
squarednode/.style={rectangle, draw=gray!60, fill=white!5, very thick, minimum size=7mm}, roundnode/.style={circle, draw=green!60, fill=purple!10, very thick, minimum size=7mm},  ]
\node[roundnode ] at (0.1 ,0.2,0)   (data) {$text $};
\node[squarednode ] at (0.1 ,0.9,0 )   (next4) {$text3$};
\node[squarednode ] at (0.4,0.65,0.7 )   (next2) {$text$};
\node[squarednode ] at (0.1 ,-0.5,0)   (next) {$text$};
\draw[->,very thick] (next) -- (data) ;
\draw[->,very thick] (next2) -- (next4) ;
\draw[->,very thick] (next4) -- (data) ;
%\node[draw,single arrow] at (0.7 ,0.5,0) {Text};
\foreach \X [count=\Y] in {1.6,1.4,1.2}
{
\draw pic (box1-\Y) at (\Y,-\X/2,0) {fake box=white!70!green with dimensions 0.2 and {2\X} and 1\X};
}
\end{tikzpicture}
\end{document}

which gives this:

The shape of the rectangle in the latex is fine as is. But how could I get the whole diagram as in the first image.

Next:

1. make text on rectangle different
2. reduce spaces between rectangle
3. add the big outer circle

Thanks

Answer 1

To place vertical text on some path using the decorations.text library inside a \foreach loop where the text is given as one of the loop's arguments is not trivial, because you first need to expand the argument that contains the text. So, you need to do something like:

\foreach \l [count=\i] in {Text, TEXt} {
    \edef\textpath{
        \noexpand%
        \path[decorate, decoration={
            text effects along path, text={\l}, text align=center
        }] (\i,2) -- (\i,-2);
    }\textpath
}

The following approach shows how you could use this inside your drawing. Also, it shows how to use the fit library in combination with pics:

\documentclass[border=10pt]{standalone}
\usepackage{tikz}
\usetikzlibrary{decorations.text, decorations.markings, fit, arrows.meta}
% definition of some colors
\colorlet{mygreen1}{green!50!cyan!80!black}
\colorlet{mygreen2}{yellow!80!green!80!black!50}
\colorlet{myyellow}{yellow!50!black}
% definition of the cuboid pic
\tikzset{
    pics/regular cuboid/.style={
        code={
            \tikzset{regular cuboid/.cd, #1}
            \draw[regular cuboid/front]
                (0,0) 
                coordinate (-south west) rectangle 
                (\pgfkeysvalueof{/tikz/regular cuboid/width},
                 \pgfkeysvalueof{/tikz/regular cuboid/height})
                coordinate (-north east)
                node[regular cuboid/label] 
                    {\pgfkeysvalueof{/tikz/regular cuboid/label text}};
            \draw[regular cuboid/top]
                (0,\pgfkeysvalueof{/tikz/regular cuboid/height}) 
                coordinate (-north west) -- 
                ++(\pgfkeysvalueof{/tikz/regular cuboid/depth},
                   \pgfkeysvalueof{/tikz/regular cuboid/depth})
                coordinate (-far north west) --
                ++(\pgfkeysvalueof{/tikz/regular cuboid/width},0)
                coordinate (-far north east) -- 
                (-north east) -- 
                cycle;
            \draw[regular cuboid/side]
                (\pgfkeysvalueof{/tikz/regular cuboid/width},0) 
                coordinate (-south east) -- 
                ++(\pgfkeysvalueof{/tikz/regular cuboid/depth},
                   \pgfkeysvalueof{/tikz/regular cuboid/depth}) 
                coordinate (-far south east) --
                (-far north east) -- 
                (-north east) -- 
                cycle;
            \coordinate (-north) at 
                ({0.5\pgfkeysvalueof{/tikz/regular cuboid/width}},
                 \pgfkeysvalueof{/tikz/regular cuboid/height});
            \coordinate (-south) at 
                ({0.5\pgfkeysvalueof{/tikz/regular cuboid/width}},0);
            \coordinate (-east) at 
                (\pgfkeysvalueof{/tikz/regular cuboid/width},
                 {0.5\pgfkeysvalueof{/tikz/regular cuboid/height}});
            \coordinate (-west) at 
                (0,0.5\pgfkeysvalueof{/tikz/regular cuboid/height});
        }
    },
    regular cuboid/height/.initial={1},
    regular cuboid/width/.initial={1},
    regular cuboid/depth/.initial={0.5},
    regular cuboid/label text/.initial={},
    regular cuboid/front/.style={fill=black!10},
    regular cuboid/top/.style={fill=black!10},
    regular cuboid/side/.style={fill=black!20},
    regular cuboid/label/.style={midway}
}
\begin{document}
\begin{tikzpicture}
% create the row of pics
\coordinate (box 0-south west) at (0,0);
\foreach \h/\f/\d/\l [count=\i] in {
    3cm/yellow!20/mygreen1/Text,
    3cm/yellow!20/mygreen1/TEXt,
    2.9cm/blue!20/black/Text,
    2.5cm/yellow!20/mygreen1/Text,
    2.4cm/yellow!20/mygreen1/Text,
    2.3cm/blue!10/black/Text,
    2cm/yellow!20/mygreen1/Text
} {
    % create the cuboid
    \pgfmathtruncatemacro{\lasti}{\i-1}
    \pic (box \i) at ([xshift=1.25cm]box \lasti-south west) {
        regular cuboid={
            front/.style={draw=\d,fill=\f},
            top/.style={draw=\d,fill=\f},
            side/.style={draw=\d,fill=\f!black!20},
            height={\h},
            width={0.65cm},
            depth={0.25cm}
        }
    };
    % add the vertical label
    \edef\labelpath{
        \noexpand%
        \path[decorate, decoration={
            text effects along path, text={\l}, text align=center
        }] (box \i-north) -- (box \i-south);
    }\labelpath
}
% add the last cuboid with horizontal label
\pic (box 8) at ([xshift=1.25cm]box 7-south west) {
    regular cuboid={
        front/.style={fill=mygreen2},
        top/.style={fill=mygreen2},
        side/.style={fill=mygreen2!80!black},
        width={1.33cm},
        depth={0.25cm},
        label text={Text}
    }
};
% add the surrounding frame with arrow heads
\node[draw, thick, rounded corners=0.5cm, inner xsep=0.5cm, inner ysep=1cm,
    fit={(box 1-south west) ([yshift=0.5cm]box 1-far north west) (box 8-far north east)},
    postaction={decorate, decoration={markings, 
        mark={at position 7.5cm with {\arrow{Stealth[length=10pt]}}},
        mark={at position 15.5cm with {\arrow{Stealth[length=10pt]}}},
        mark={at position 32.5cm with {\arrow{Stealth[length=10pt]}}}
    }}] 
    (frame) {};
% place some text inside the frame
\node[myyellow, font=\bfseries, anchor=west] 
    at ([yshift=1cm]box 1-north west) 
    {Some text, some text};
% add the two orange nodes at the bottom of the frame
\node[draw, fill=orange!10, rounded corners, inner sep=0.25cm, minimum width=4cm]
    at ([yshift=-1cm, xshift=4cm]box 1-south west)
    {Text};
\node[draw, fill=orange!10, rounded corners, inner sep=0.25cm, minimum width=4cm]
    at ([yshift=-1cm, xshift=8.5cm]box 1-south west)
    {Text};
% place another pic to the left
\pic (box 9) at (-4,0) {
    regular cuboid={
        front/.style={draw=mygreen1,fill=mygreen2},
        top/.style={draw=mygreen1,fill=mygreen2},
        side/.style={draw=mygreen1,fill=mygreen2!80!black},
        width={1.33cm},
        depth={0.25cm},
        label text={Text}
    }
};
% add the three nodes above and below the pic on the left
\node[draw=mygreen1, rounded corners, inner sep=0.25cm, minimum width=2cm]
    (label 1) at ([yshift=-1cm]box 9-south)
    {text};
\node[draw=mygreen1, rounded corners, inner sep=0.25cm, minimum width=2cm]
    (label 2) at ([yshift=1.5cm]box 9-north)
    {text};
\node[draw=mygreen1, rounded corners, inner sep=0.25cm, minimum width=2cm]
    (label 3) at ([yshift=1cm]label 2.north)
    {text};
% add the arrows with labels
\draw[-{Stealth[length=10pt]}, thick]
    (frame.90) -- ++(0,0.5cm) -| (label 3.north)
    node[pos=0.4, below, myyellow, font=\bfseries] {Some text};
\draw[-{Stealth[length=10pt]}, thick]
    (label 1.north) -- (box 9-south);
\draw[-{Stealth[length=10pt]}, thick]
    (label 3.south) -- (label 2.north);
\draw[-{Stealth[length=10pt]}, thick]
    (label 2.south) -- (box 9-north |- box 9-far north east);
\draw[-{Stealth[length=10pt]}, thick, myyellow]
    (box 9-west -| box 9-far north east) -- (box 9-west -| frame.west)
    node[midway, above, myyellow, font=\bfseries] {Text}
    node[midway, below, myyellow, font=\bfseries] {Text};
\end{tikzpicture}
\end{document}