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127 lines
3.5 KiB
127 lines
3.5 KiB
#!/usr/bin/env bash |
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# pipes.sh: Animated pipes terminal screensaver. |
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# |
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# This modified version is maintained at: |
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# |
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# https://github.com/pipeseroni/pipes.sh |
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VERSION=1.1.0 |
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M=32768 |
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p=1 |
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f=75 s=13 r=2000 t=0 |
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w=$(tput cols) h=$(tput lines) |
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# ab -> idx = a*4 + b |
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# 0: up, 1: right, 2: down, 3: left |
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# 00 means going up , then going up -> ┃ |
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# 12 means going right, then going down -> ┓ |
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sets=( |
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"┃┏ ┓┛━┓ ┗┃┛┗ ┏━" |
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"│╭ ╮╯─╮ ╰│╯╰ ╭─" |
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"│┌ ┐┘─┐ └│┘└ ┌─" |
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"║╔ ╗╝═╗ ╚║╝╚ ╔═" |
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"|+ ++-+ +|++ +-" |
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"|/ \/-\ \|/\ /-" |
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".. .... .... .." |
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".o oo.o o.oo o." |
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"-\ /\|/ /-\/ \|" # railway |
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) |
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v=() |
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RNDSTART=0 |
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BOLD=1 |
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NOCOLOR=0 |
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OPTIND=1 |
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while getopts "p:t:f:s:r:RBChv" arg; do |
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case $arg in |
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p) ((p=(OPTARG>0)?OPTARG:p));; |
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t) |
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if [[ "$OPTARG" = c???????????????? ]]; then |
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V+=(${#sets[@]}) |
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sets+=("${OPTARG:1}") |
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else |
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((OPTARG>=0 && OPTARG<${#sets[@]})) && V+=($OPTARG) |
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fi |
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;; |
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f) ((f=(OPTARG>19 && OPTARG<101)?OPTARG:f));; |
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s) ((s=(OPTARG>4 && OPTARG<16 )?OPTARG:s));; |
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r) ((r=(OPTARG>=0)?OPTARG:r));; |
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R) RNDSTART=1;; |
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B) BOLD=0;; |
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C) NOCOLOR=1;; |
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h) echo -e "Usage: $(basename $0) [OPTION]..." |
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echo -e "Animated pipes terminal screensaver.\n" |
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echo -e " -p [1-]\tnumber of pipes (D=1)." |
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echo -e " -t [0-$((${#sets[@]} - 1))]\ttype of pipes, can be used more than once (D=0)." |
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echo -e " -t c[16 chars]\tcustom type of pipes." |
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echo -e " -f [20-100]\tframerate (D=75)." |
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echo -e " -s [5-15]\tprobability of a straight fitting (D=13)." |
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echo -e " -r LIMIT\treset after x characters, 0 if no limit (D=2000)." |
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echo -e " -R \t\trandom starting point." |
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echo -e " -B \t\tno bold effect." |
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echo -e " -C \t\tno color." |
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echo -e " -h\t\thelp (this screen)." |
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echo -e " -v\t\tprint version number.\n" |
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exit 0;; |
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v) echo "$(basename -- "$0") $VERSION" |
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exit 0 |
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esac |
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done |
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# set default values if not by options |
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((${#V[@]})) || V=(0) |
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cleanup() { |
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# clear up standard input |
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read -t 0.001 && cat </dev/stdin>/dev/null |
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# terminal has no smcup and rmcup capabilities |
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((FORCE_RESET)) && reset && exit 0 |
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tput rmcup |
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tput cnorm |
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stty echo |
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((NOCOLOR)) && echo -ne '\e[0m' |
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exit 0 |
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} |
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trap cleanup HUP TERM |
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trap 'break 2' INT |
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for (( i=1; i<=p; i++ )); do |
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c[i]=$((i%8)) n[i]=0 l[i]=0 |
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((x[i]=RNDSTART==1?RANDOM*w/32768:w/2)) |
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((y[i]=RNDSTART==1?RANDOM*h/32768:h/2)) |
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v[i]=${V[${#V[@]} * RANDOM / M]} |
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done |
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stty -echo |
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tput smcup || FORCE_RESET=1 |
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tput civis |
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tput clear |
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# any key press exits the loop and this script |
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while REPLY=; read -t 0.0$((1000/f)) -n 1; [[ -z $REPLY ]] ; do |
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for (( i=1; i<=p; i++ )); do |
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# New position: |
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((${l[i]}%2)) && ((x[i]+=-${l[i]}+2,1)) || ((y[i]+=${l[i]}-1)) |
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# Loop on edges (change color on loop): |
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((${x[i]}>w||${x[i]}<0||${y[i]}>h||${y[i]}<0)) && ((c[i]=RANDOM%8, v[i]=V[${#V[@]}*RANDOM/M])) |
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((x[i]=(x[i]+w)%w)) |
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((y[i]=(y[i]+h)%h)) |
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# New random direction: |
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((n[i]=RANDOM%s-1)) |
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((n[i]=(${n[i]}>1||${n[i]}==0)?${l[i]}:${l[i]}+${n[i]})) |
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((n[i]=(${n[i]}<0)?3:${n[i]}%4)) |
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# Print: |
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tput cup ${y[i]} ${x[i]} |
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echo -ne "\e[${BOLD}m" |
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[[ $NOCOLOR == 0 ]] && echo -ne "\e[3${c[i]}m" |
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echo -n "${sets[v[i]]:l[i]*4+n[i]:1}" |
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l[i]=${n[i]} |
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done |
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((r>0 && t*p>=r)) && tput reset && tput civis && t=0 || ((t++)) |
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done |
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cleanup
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