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-rwxr-xr-xcode/fun/pipesx193
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diff --git a/code/fun/pipesx b/code/fun/pipesx
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-#!/bin/bash
-# Animated pipes.sh terminal screensaver at an angle.
-# Copyright (C) 2013, 2014 by 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/livibetter/pipesX.sh
-
-VERSION=0.1.0
-
-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=()
-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)
- -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 $arg in
- n)
- ((N = OPTARG > 0 ? OPTARG : N))
- ;;
- t)
- T+=($(((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 "$HELP"
- exit 0
- ;;
- v)
- echo "$(basename -- "$0") $VERSION"
- exit 0
- esac
-done
-
-# set to default values if not by options
-((${#T[@]})) || T=(0)
-
-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]}
- t[n]=${T[${#T[@]} * 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]}
- ((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
- read -t $I -n 1 && [[ $REPLY =~ q|Q ]] && do_exit
- ((R)) && ((r += N, r >= R)) && r=0 && clear
-done
-
-do_exit \ No newline at end of file