227 lines
6.9 KiB
Bash
Executable file
227 lines
6.9 KiB
Bash
Executable file
#!/usr/bin/env bash
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# pipes.sh: Animated pipes terminal screensaver.
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# https://github.com/pipeseroni/pipes.sh
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#
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# Copyright (c) 2015-2018 Pipeseroni/pipes.sh contributors
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# Copyright (c) 2013-2015 Yu-Jie Lin
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# Copyright (c) 2010 Matthew Simpson
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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# SOFTWARE.
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VERSION=1.3.0
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M=32768 # Bash RANDOM maximum + 1
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p=1 # number of pipes
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f=75 # frame rate
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s=13 # probability of straight fitting
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r=2000 # characters limit
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t=0 # iteration counter for -r character limit
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w=80 # terminal size
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h=24
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# ab -> sets[][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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"-\ /\|/ /-\/ \|"
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"╿┍ ┑┚╼┒ ┕╽┙┖ ┎╾"
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"████▀▀███▀█▀▀██▀"
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)
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# pipes'
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x=() # current position
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y=()
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l=() # current directions
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# 0: up, 1: right, 2: down, 3: left
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n=() # new directions
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v=() # current types
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c=() # current color
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# selected pipes'
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V=() # types (indexes to sets[])
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C=() # colors
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VN=0 # number of selected types
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CN=0 # number of selected colors
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# switches
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RNDSTART=0 # randomize starting position and direction
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BOLD=1
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NOCOLOR=0
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KEEPCT=0 # keep pipe color and type
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parse() {
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OPTIND=1
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while getopts "p:t:c:f:s:r:RBCKhv" 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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c) [[ $OPTARG =~ ^[0-7]$ ]] && C+=($OPTARG);;
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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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K) KEEPCT=1;;
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h) echo -e "Usage: $(basename $0) [OPTION]..."
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echo -e "Animated pipes terminal screensaver.\n"
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echo -e " -p [1-]\tnumber of pipes (D=1)."
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echo -e " -t [0-$((${#sets[@]} - 1))]\ttype of pipes, can be used more than once (D=0)."
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echo -e " -c [0-7]\tcolor of pipes, can be used more than once (D=1 2 3 4 5 6 7 0)."
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echo -e " -t c[16 chars]\tcustom type of pipes."
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echo -e " -f [20-100]\tframerate (D=75)."
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echo -e " -s [5-15]\tprobability of a straight fitting (D=13)."
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echo -e " -r LIMIT\treset after x characters, 0 if no limit (D=2000)."
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echo -e " -R \t\trandomize starting position and direction."
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echo -e " -B \t\tno bold effect."
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echo -e " -C \t\tno color."
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echo -e " -K \t\tpipes keep their color and type when hitting the screen edge."
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echo -e " -h\t\thelp (this screen)."
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echo -e " -v\t\tprint version number.\n"
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exit 0;;
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v) echo "$(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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VN=${#V[@]}
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((${#C[@]})) || C=(1 2 3 4 5 6 7 0)
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CN=${#C[@]}
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}
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cleanup() {
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# clear out standard input
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read -t 0.001 && cat </dev/stdin>/dev/null
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# terminal has no smcup and rmcup capabilities
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((FORCE_RESET)) && reset && exit 0
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tput reset # fix for konsole, see pipeseroni/pipes.sh#43
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tput rmcup
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tput cnorm
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# stty echo
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((NOCOLOR)) && echo -ne '\e[0m'
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exit 0
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}
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resize() {
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w=$(tput cols) h=$(tput lines)
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}
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init() {
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local i
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resize
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trap resize SIGWINCH
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ci=$((KEEPCT ? 0 : CN * RANDOM / M))
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vi=$((KEEPCT ? 0 : VN * RANDOM / M))
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for ((i = 0; i < p; i++)); {((
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n[i] = 0,
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l[i] = RNDSTART ? RANDOM % 4 : 0,
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x[i] = RNDSTART ? w * RANDOM / M : w / 2,
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y[i] = RNDSTART ? h * RANDOM / M : h / 2,
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c[i] = C[ci],
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v[i] = V[vi],
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ci = (ci + 1) % CN,
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vi = (vi + 1) % VN
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));}
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# stty -echo
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tput smcup || FORCE_RESET=1
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tput civis
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tput clear
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trap cleanup HUP TERM
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}
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main() {
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local i
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parse "$@"
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init "$@"
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# any key press exits the loop and this script
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trap 'break 2' INT
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while REPLY=; do
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read -t 0.0$((1000 / f)) -n 1 2>/dev/null
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case "$REPLY" in
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P) ((s = s < 15 ? s + 1 : s));;
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O) ((s = s > 3 ? s - 1 : s));;
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F) ((f = f < 100 ? f + 1 : f));;
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D) ((f = f > 20 ? f - 1 : f));;
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B) ((BOLD = (BOLD + 1) % 2));;
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C) ((NOCOLOR = (NOCOLOR + 1) % 2));;
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K) ((KEEPCT = (KEEPCT + 1) % 2));;
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?) break;;
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esac
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for ((i = 0; i < p; i++)); do
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# New position:
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# l[] direction = 0: up, 1: right, 2: down, 3: left
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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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((!KEEPCT && (x[i] >= w || x[i] < 0 || y[i] >= h || y[i] < 0))) \
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&& ((c[i] = C[CN * RANDOM / M], v[i] = V[VN * 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] = s * RANDOM / M - 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)) && echo -ne "\e[0m" || 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]=${n[i]}
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done
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((r > 0 && t * p >= r)) && tput reset && tput civis && t=0 || ((t++))
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done
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cleanup
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}
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main "$@"
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