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EZ
#!/bin/bash base_str="____________________________________________________________________________________________________" str_arr=() read level draw_fractal() { local current_level=$1 local row_no=$2 local pos=$3 local row_current=$4 if [ $current_level -eq $level ]; then return fi for ((i = 1; i <= $row_no; i++)); do str_arr[$row_current]="${str_arr[$row_current]:0:$pos}1${str_arr[$row_current]:$(($pos + 1))}" row_current=$(($row_current + 1)) done for ((i = 1; i <= $row_no; i++)); do str_arr[$row_current]="${str_arr[$row_current]:0:$(($pos + $i))}1${str_arr[$row_current]:$(($pos + $i + 1))}" str_arr[$row_current]="${str_arr[$row_current]:0:$(($pos - $i))}1${str_arr[$row_current]:$(($pos - $i + 1))}" row_current=$(($row_current + 1)) done draw_fractal $(($current_level + 1)) $(($row_no / 2)) $(($pos - $row_no )) $row_current draw_fractal $(($current_level + 1)) $(($row_no / 2)) $(($pos + $row_no )) $row_current } for (( i=1; i<=64; i++ )); do str_arr[i]=$base_str done draw_fractal 0 16 49 1 length=${#str_arr[@]} for (( i=length-1; i>=0; i-- )); do echo "${str_arr[i]}" doner_arr[i]}" done
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Functions and Fractals - Recursive Trees - Bash!
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EZ