use ~/bin like a civilized nixer

1 files changed, 193 insertions, 0 deletions

diff --git a/fun/bin/pipesx b/fun/bin/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
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