5

I would like to stack several png images as shown below

enter image description here

How can I do this with Tikz?

1 Answer 1

10

TikZ has a predefined 3d coordinate system, which is not orthographic, but more than sufficient to stack some objects in the z direction.

\documentclass[tikz,border=3mm]{standalone}
\definecolor{fb}{RGB}{128,158,204}
\definecolor{db}{RGB}{111,141,191}  
\begin{document}
\begin{tikzpicture}
 \foreach \Z in {0,0.5,1,1.5}
 {\draw[fill=fb,draw=db] (-2,-2,\Z) rectangle (2,2,\Z);}
\end{tikzpicture}
\end{document}

enter image description here

For external images it works the same way. (I made them a bit transparent to show that these are really different images, but you can remove the opacity=0.8 key.)

\documentclass[tikz,border=3mm]{standalone}
\begin{document}
\begin{tikzpicture}
 \foreach \X [count=\Z]in {a,b,c,duck}
 {\node[opacity=0.8] at (0,0,\Z/2) {\includegraphics[width=4cm,height=3cm]{example-image-\X}};}
\end{tikzpicture}
\end{document}

enter image description here

11
  • 1
    @random9 This is in the second part of my answer.
    – user194703
    May 26, 2020 at 15:32
  • 1
    @BambOo It needs to be stressed that there is no pineapple on the pizza. ;-)
    – user194703
    May 26, 2020 at 15:59
  • 2
    @BambOo pineapple on a pizza is a bit like an italic differential d: wrong but some people like it. ;-)
    – user194703
    May 26, 2020 at 16:13
  • 2
    @random9 Yes, TikZ has a unit vector in the z direction, which is (-1/(2*sqrt(2)),-1/(2*sqrt(2))) in screen coordinates. You can verify this by adding \makeatletter \pgfmathsetmacro{\pft}{1cm/(2*sqrt(2))} \typeout{e_z=(\the\pgf@zx,\the\pgf@zy)=(-\pft,-\pft)} \makeatother to the code. That is, if you supply a third component to the coordinate, you will add the component times this unit vector.
    – user194703
    May 26, 2020 at 18:38
  • 2
    @random9 It means that, say, the point (1,1,0) gets mapped to the screen coordinate (1cm,1cm), and the point (1,1,1) will get mapped to ((1-1/(2*sqrt(2)))*1cm, (1-1/(2*sqrt(2)))*1cm), which is shifted to the down left compared to the first point.
    – user194703
    May 26, 2020 at 18:53

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