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A version of mandelbrot.sh originally written by Benjamin Staffin here: https://gist.github.com/benley/4984040 This version is plain "sh" without any bash-specific code. You have to be extremely patient to actually run it.
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#!/bin/sh | |
# | |
# Mandelbrot in plain sh without any bash-specific features | |
# | |
# Original version by Benjamin Staffin: | |
# https://gist.github.com/benley/4984040 | |
# | |
L=99 | |
P=100000000 | |
Q=`expr $P / 100` | |
X=`expr $Q \* 320 / \( \`tput cols\` - 1 \)` | |
Y=`expr $Q \* 210 / \`tput lines\`` | |
y=`expr $Q \* -105` | |
v=`expr $Q \* -220` | |
x=$v | |
while [ $y -lt `expr 105 \* $Q` ] ; do | |
while [ $x -lt $P ] ; do | |
a=0 | |
b=0 | |
i=0 | |
c=0 | |
while [ \( `expr $a \* $a + $b \* $b` -lt `expr 4 \* $P \* $P` \) -a \( $i -lt $L \) ] ; do | |
i=`expr $i + 1` | |
c=$a | |
a=`expr \( $a \* $a - $b \* $b \) / $P + $x` | |
b=`expr 2 \* $b \* $c / $P + $y` | |
done | |
i=`expr $i + 1` | |
if [ $i -ge $L ] ; then | |
j=0 | |
else | |
j=`expr $i % 16` | |
fi | |
if [ $j -gt 7 ] ; then | |
tput smso | |
else | |
tput rmso | |
fi | |
tput setaf `expr $i % 8` | |
x=`expr $x + $X` | |
echo -n "#" | |
done | |
tput sgr0 | |
x=$v | |
y=`expr $y + $Y` | |
done |
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