8

This blog shows some math parametrized functions that can be used to "plot" symmetric leaves like the one below:

enter image description here

Is it possible to implement such functions and draw the leaf using TikZ?

6
  • 9
    Probably. Can you? Or is this a do-it-all-for-me without even the it?
    – cfr
    Jan 11, 2017 at 4:06
  • I can't draw it.
    – Epa
    Jan 11, 2017 at 5:00
  • 2
    @Thumbolt, now perhaps you can't. Though what crf probably means is should you try to do it then one day you'll be able to draw it. If you never try you never will. :) Jan 11, 2017 at 7:01
  • 1
    I was reading the pgfplots example gallery but I was unable to find an example that has x(t)=, y(t)= ... of that kind.
    – Epa
    Jan 11, 2017 at 7:30
  • 2
    There are several questions about parametric plots here on the site, e.g. tex.stackexchange.com/questions/319739 or tex.stackexchange.com/questions/65719/… and more Jan 11, 2017 at 9:11

2 Answers 2

11

Simply based on rpapa's answer and the formulas in the question, here is a working .tex file which can be compiled with pdflatex:

\documentclass{article}
\usepackage[margin=2cm]{geometry}

\usepackage{tikz}
\begin{document}

\begin{tikzpicture}
\draw[scale=3, domain=0:180, variable=\t, samples=500, fill=red]
plot (%
{
(
1
+
(cos(6*\t))^2
+
(1/5)*(cos(6*\t)*cos(24*\t))^10
+
( (1/4)*(cos(30*\t))^2 + (1/9)*(cos(30*\t))^12) *  (1-(sin(6*\t))^10)
)
*(sin(2*\t))
*(1-(cos(\t))^4)
*(1 - (cos(\t))^10 * (cos(3*\t))^2)
+(1/70)*(cos(\t))^9
}
,
{
(-21/20)*cos(2*\t)*(1 - (cos(\t))^4 + (1/2)*(cos(\t)*cos(3*\t))^10)
*
(
1
+
(cos(6*\t))^2
+
(1/5)*(cos(6*\t)*cos(18*\t))^10
+
( (1/4)*(cos(30*\t))^4 + (1/10)*(cos(30*\t))^12 )
*
( 1 - ((cos(\t))^10) * (cos(3*\t))^2 )
*
( 1 - (sin(6*\t))^10 )
)
}
);
\end{tikzpicture}
\end{document}

I left in my original line-breaks and potentially unnecessary parentheses.

Notes:

I recommend qtikz or ktikz on GNU/Linux to easily preview TikZ pictures.

Also, when copying the formulas, make sure to always add a "*" between numbers and "\t". I am not sure why it is necessary, but TikZ seems to read things like "6\t" wrong without giving any errors.

Maple leaf generated with TikZ

red Maple leaf generated with TikZ

3
  • Very nice rendering. Jan 11, 2017 at 15:12
  • Can we color this leaf?
    – Reza
    Nov 28, 2018 at 14:07
  • Yes, we can! Simply add ",fill=red" for example to the \draw command. Check the tikz documentation for more infos. :)
    – KIAaze
    Dec 4, 2018 at 12:34
18

Oak Leaf only with basic function of Tikz

\documentclass{article}
\usepackage[margin=2cm]{geometry}

\usepackage{tikz}
\begin{document}

\begin{tikzpicture}
\draw[scale=3,domain=0:180,variable=\t, samples=500]
plot (%
{1/100*(cos(\t))^9*(cos(5*\t))^10 +1/4*sin(2*\t)*(1-1/2*(sin(10*\t))^2)*(1-(cos(\t)*cos(3*\t))^8)
},{
sin(\t)*(1-1/5*(sin(10*\t)^2*(1/2+(sin(2*\t)^2)
});
\end{tikzpicture}
\end{document}

enter image description here

1
  • 3
    But if you are from Canada, an oak leaf just won't do.... Jan 11, 2017 at 11:18

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