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Diffstat (limited to 'code/fun/pipesx')
| -rwxr-xr-x | code/fun/pipesx | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/code/fun/pipesx b/code/fun/pipesx new file mode 100755 index 0000000..02ed325 --- /dev/null +++ b/code/fun/pipesx @@ -0,0 +1,159 @@ +#!/bin/bash +W=$(tput cols) H=$(tput lines) +# maximal random value + 1 +M=32768 + +SETS=('╱╲' '/\') +COLORS=(31 32 33 34 35 36 37) + +# default values +N=1 +T=0 +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))] type of pipes. (Default: $T) + -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. +" + +while getopts "n:t:i:P:r:RCXh" arg; do + case $arg in + n) + ((N = OPTARG > 0 ? OPTARG : N)) + ;; + t) + ((T = (OPTARG >= 0 && OPTARG < ${#SETS[@]}) ? OPTARG : T)) + ;; + i) + I=$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 + ;; + esac +done + +do_exit() { + # Show cursor and echo stdin + echo -ne "\e[?25h" + stty echo + clear + exit 0 + } +trap do_exit INT TERM + +# No echo stdin and hide the cursor +stty -echo +echo -ne "\e[?25l" + +# 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]} +done + +clear +while :; 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]} + + # 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 "${SETS[T]:d%2:1}" + + X[n]=$xn Y[n]=$yn + D[n]=$d C[n]=$c + done + read -t $I -n 1 && [[ $REPLY =~ q|Q ]] && do_exit + ((R)) && ((r += N, r >= R)) && r=0 && clear +done + +do_exit
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