#!/bin/bash # Animated pipes.sh terminal screensaver at an angle. # Copyright (c) 2013-2015 Yu-Jie Lin # # Permission is hereby granted, free of charge, to any person obtaining a copy # of this software and associated documentation files (the "Software"), to deal # in the Software without restriction, including without limitation the rights # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell # copies of the Software, and to permit persons to whom the Software is # furnished to do so, subject to the following conditions: # # The above copyright notice and this permission notice shall be included in # all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN # THE SOFTWARE. # # Website: https://github.com/pipeseroni/pipesX.sh VERSION=1.1.0 W=$(tput cols) H=$(tput lines) # maximal random value + 1 M=32768 SETS=('╱╲' '/\' '..' 'oo' '\/') COLORS=(31 32 33 34 35 36 37) # default values N=1 T=() I=0.05 P=25 R=$((W * H / 4)) HELP="Usage: $(basename $0) [OPTIONS] Animated pipes.sh terminal screensaver at an angle. Options: -n [1-] number of pipes. (Default: $N) -t [0-$((${#SETS[@]} - 1))] types of pipes, can be used more than once. (Default: $T) -t c[2chs] custom type of pipes. -i [float] piping interval or maze generation interval. (Default: $I) -P [0-100] probability of a turning pipe or of \\ in maze generation. (Default: $P) -r [LIMIT] reset after x characters, 0 if no limit. (Default: $R) -R random starting point. -C no color. -X maze generation. -h this help message. -v print version number. " while getopts "n:t:i:P:r:RCXhv" arg; do case $arg in n) ((N = OPTARG > 0 ? OPTARG : N)) ;; t) if [[ "$OPTARG" = c?? ]]; then T+=(${#SETS[@]}) SETS+=("${OPTARG:1}") else T+=($(((OPTARG >= 0 && OPTARG < ${#SETS[@]}) ? OPTARG : T))) fi ;; i) I=$OPTARG ;; P) ((P = (OPTARG >= 0 && OPTARG <= 100) ? OPTARG : P)) ;; r) ((R = OPTARG >= 0 ? OPTARG : R)) ;; R) RNDSTART=1 ;; C) NOCOLOR=1 ;; X) MAZE=1 ;; h) echo -e "$HELP" exit 0 ;; v) echo "$(basename -- "$0") $VERSION" exit 0 esac done # set to default values if not by options ((${#T[@]})) || T=(0) do_exit() { # clear up standard input read -t 0.001 && cat </dev/stdin>/dev/null # terminal has no smcup and rmcup capabilities ((FORCE_RESET)) && reset && exit 0 tput rmcup tput cnorm stty echo ((NOCOLOR)) && echo -ne '\e[0m' exit 0 } trap do_exit HUP TERM trap 'break 2' INT # No echo stdin and hide the cursor stty -echo tput smcup || FORCE_RESET=1 tput civis tput clear # maze geneartion while [[ $MAZE ]] && clear; do [[ $NOCOLOR ]] || echo -ne "\e[1;${COLORS[${#COLORS[@]} * RANDOM / M]}m" for ((i = 0; i < W * H; i++ )); do echo -ne ${SETS[T]:100 * RANDOM / M < P:1} done read -t $I -n 1 && [[ $REPLY =~ q|Q ]] && do_exit done # initialze values for ((n = 0; n < N; n++)); do ((X[n] = RNDSTART ? (W + 2) * RANDOM / M : W / 2)) ((Y[n] = RNDSTART ? (H + 2) * RANDOM / M : H / 2)) D[n]=$((4 * RANDOM / M)) C[n]=${COLORS[${#COLORS[@]} * RANDOM / M]} t[n]=${T[${#T[@]} * RANDOM / M]} done clear while REPLY=; read -t $I -n 1; [[ -z $REPLY ]] ; do for ((n = 0; n < N; n++, CC = 0)); do x=${X[n]} y=${Y[n]} d=${D[n]} c=${C[n]} # calculate new direction `d` # 1 0 # \/ 4 directions 0 to 3 # /\ # 2 3 # valid directions: d: dd', d' is the new direction # d # 0: / 00 \ 01 03 # / / /\ # 1: / 10 \ 11 12 # \ \ /\ # 2: \/ 21 / 22 / 23 # / \ # 3: \/ 30 \ 32 \ 33 # / \ ((d = (100 * RANDOM / M) < P ? ((d + 1) + 2 * (RANDOM % 2)) % 4 : d)) ((e = (d + 1) % 4)) # calculate new position # d' x' y' # 0: x+1 y-1 # 1: x-1 y-1 # 2: x-1 y+1 # 3: x+1 y+1 ((xn = e < 2 ? x + 1 : x - 1)) ((yn = d < 2 ? y - 1 : y + 1)) # adjust position and change color? ((d < 2 && y == 0)) && ((yn--, CC=1)) ((e > 1 && x == 0)) && ((xn--, CC=1)) ((d > 1 && y == H)) && ((yn++, CC=1)) ((e < 2 && x == W)) && ((xn++, CC=1)) ((CC)) && c=${COLORS[${#COLORS[@]} * RANDOM / M]} ((CC)) && t[n]=${T[${#T[@]} * RANDOM / M]} # warp pipe ((xn = (xn + W + 1) % (W + 1))) ((yn = (yn + H + 1) % (H + 1))) # calculate position in terminal # d' xt yt # 0: x' y'+1 # 1: x'+1 y'+1 # 2: x'+1 y' # 3: x' y' ((xt = e < 2 ? xn : xn + 1)) ((yt = d < 2 ? yn + 1 : yn)) echo -ne "\e[${yt};${xt}H" [[ $NOCOLOR ]] || echo -ne "\e[1;${c}m" echo -n "${SETS[t[n]]:d%2:1}" X[n]=$xn Y[n]=$yn D[n]=$d C[n]=$c done ((R)) && ((r += N, r >= R)) && r=0 && clear done do_exit