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I have a case where I need to draw a hexagonal grid in LaTeX. I am considering just reading the grid from an eps file.

Is there an alternative way to do it completely within LaTeX?

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You can use TikZ and adopt the code from this triangular grid. –  Caramdir Nov 26 '10 at 23:14
as usual tikz or pstricks or metapost among others –  pluton Nov 26 '10 at 23:17
By the way, I was quite amused by your no-so-veiled "threat" to LaTeX: "I am considering just reading the grid from an eps file.".... :-) –  Yossi Farjoun Nov 28 '10 at 9:18
Thanks for mentioning TikZ. I want to typeset some astrology charts and this might be just the thing. –  Larry Coleman Nov 28 '10 at 23:14

2 Answers 2

up vote 30 down vote accepted

Here's a quick option:

  \foreach \i in {0,...,3} 
  \foreach \j in {0,...,3} {
  \foreach \a in {0,120,-120} \draw (3*\i,2*sin{60}*\j) -- +(\a:1);
  \foreach \a in {0,120,-120} \draw (3*\i+3*cos{60},2*sin{60}*\j+sin{60}) -- +(\a:1);}

Which results in

alt text

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I think your approximations are not good enough. The lines of the grid cross each other slightly. –  Caramdir Nov 26 '10 at 23:46
Fixed. I was lazy before, and it was late... –  Yossi Farjoun Nov 27 '10 at 10:40
That is an amazingly good solution! –  Yiannis Lazarides Nov 27 '10 at 12:48
I have to give you the checkmark. You did exactly how I dreamt it. –  John Smith Nov 29 '10 at 0:13
Took a bit of searching for the code to do this (but faster than doing it myself) but thanks. It's helped me too. –  Matthew Orlinski Apr 8 '13 at 23:09

With TikZ, you can define a pattern which allows to fill any shape with a hexagonal grid by adding the option pattern=hexagons:

alt text



  {hexagons}% name
  {\pgfpointorigin}% lower left
  {\pgfpoint{3*\hexagonsize}{0.866025*2*\hexagonsize}}%  upper right
  {\pgfpoint{3*\hexagonsize}{0.866025*2*\hexagonsize}}%  tile size
  {% shape description

\fill[pattern=hexagons] (0,0) rectangle (10,5);

\fill[pattern=hexagons] (0,0) circle (3cm);


You can change the size of the hexagons by modifying the value of the macro \hexagonsize.

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I like it! Nice solution. –  Yossi Farjoun Nov 29 '10 at 8:16
Ah finally found it. I was looking for this nice snippet for a while with bad keywords :-) Would you like to write an answer to the open question tex.stackexchange.com/questions/54358/… ? I think this would be the perfect example. –  percusse Jun 17 '12 at 21:32
@percusse: thanks for notifying me. I'll add an answer later on. –  Philippe Goutet Jun 18 '12 at 6:34

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