61 lines
1.8 KiB
Bash
Executable File
61 lines
1.8 KiB
Bash
Executable File
#!/data/data/com.termux/files/usr/bin/env bash
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declare -i f=75 s=13 r=2000 t=0 c=1 n=0 l=0
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declare -ir w=$(tput cols) h=$(tput lines)
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declare -i x=$((w/2)) y=$((h/2))
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declare -ar v=( [00]="\x82" [01]="\x8c" [03]="\x90" ####
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[10]="\x98" [11]="\x80" [12]="\x90" # Normal UTF-8 box characters.
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[21]="\x94" [22]="\x82" [23]="\x98" # (These are the default for they are supported almost everywhere.)
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[30]="\x94" [32]="\x8c" [33]="\x80" ) ####
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# declare -ar v=( [00]="\x83" [01]="\x8f" [03]="\x93" ####
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# [10]="\x9b" [11]="\x81" [12]="\x93" # Heavy UTF-8 box characters.
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# [21]="\x97" [22]="\x83" [23]="\x9b" # (Uncomment only if your terminal supports it)
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# [30]="\x97" [32]="\x8f" [33]="\x81" ) ####
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OPTIND=1
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while getopts "f:s:r:h" arg; do
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case $arg in
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f) ((f=($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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h) echo -e "Usage: pipes [OPTION]..."
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echo -e "Animated pipes terminal screensaver.\n"
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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 (D=2000)."
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echo -e " -h\t\thelp (this screen).\n"
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exit 0;;
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esac
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done
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tput smcup
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tput reset
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tput civis
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trap "tput rmcup; tput reset; exit" SIGINT
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while true; do
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# New position:
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(($l%2)) && ((x+=($l==1)?1:-1))
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((!($l%2))) && ((y+=($l==2)?1:-1))
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# Loop on edges (change color on loop):
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((c=($x>$w || $x<0 || $y>$h || $y<0)?($RANDOM%7):$c))
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((x=($x>$w)?0:(($x<0)?$w:$x)))
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((y=($y>$h)?0:(($y<0)?$h:$y)))
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# New random direction:
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((n=$RANDOM%$s-1))
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((n=($n>1||$n==0)?$l:$l+$n))
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((n=($n<0)?3:$n%4))
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# Print:
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tput cup $y $x
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printf "\033[1;3${c}m\xe2\x94${v[$l$n]}"
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(($t>$r)) && tput reset && tput civis && t=0 || ((t++))
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l=$n
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sleep $(echo "scale=5;1/$f"|bc)
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done
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