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Felix und mir war irgendwie langweilig, da haben wir mal angefangen, eine analoge Uhr als Bash-Script zu schreiben . Leider hängt das Ding noch von bc und ncurses ab, aber das werden wir bestimmt noch eliminieren. Und eine ständige Uhrzeitanzeige bekommen wir auch noch hin .

#!/bin/bash
# Copyright (c) 2009 by Dominik George & Felix Falk

# Config

CONFIG_DIGITAL=true

# Check dependencies
if [ ! -x $(which bc) ]; then
	echo "bc not found, install bc!"

	exit 1
fi

if [ ! -x $(which tput) ]; then

	echo "tput not found, install ncurses!"
	exit 1
fi

# Definitions
PI=$(echo "4*a(1)" | bc -l)

# Library
function deg2rad {
	local x=$1
	echo $(echo "${x}/180*${PI}" | bc -l)

}

function sine {
	local x=$(deg2rad $1)

	echo $(echo "s(${x})" | bc -l)
}

function cosine {
	local x=$(deg2rad $1)

	echo $(echo "c(${x})" | bc -l)
}

function round {
	local x=$1
	local pre=$(echo ${x} | cut -d. -f1)

	local post=$(echo ${x} | cut -d. -f2)

	local postone=${post:1:1}

	if [ "${pre}" = "-" ]; then

		pre=$(echo ${pre} | sed "s/^-\$/0/")

	fi

	if [ -n ${postone} ]; then
		echo ${pre}

	else
		echo $((pre + 1))
	fi

}

function drawpoint {
	local deg=$1
	local percent=$2

	local char=$3
	local mirror=$4

	radx=$(echo "${RADIUSX} * ${percent} / 100" | bc)

        rady=$(echo "${RADIUSY} * ${percent} / 100" | bc)

	xoff=$(round $(echo "$(sine ${deg}) * ${radx}" | bc -l))

	yoff=$(round $(echo "$(cosine ${deg}) * ${rady}" | bc -l))

	tput cup $((MIDDLEY + yoff)) $((MIDDLEX + xoff))

	echo -n ${char}

	if [ ${mirror} = true ]; then

		tput cup $((MIDDLEY - yoff)) $((MIDDLEX + xoff))

		echo -n ${char}
		tput cup $((MIDDLEY + yoff)) $((MIDDLEX - xoff))

		echo -n ${char}
		tput cup $((MIDDLEY - yoff)) $((MIDDLEX - xoff))

		echo -n ${char}
	fi
}

# Clear terminal
clear

# Get terminal caps

COLS=$(tput cols)
LINES=$(tput lines)

echo ${COLS}

echo ${LINES}

# Determine clock size from terminal size
if [ ${COLS} -ge $((LINES * 2)) ]; then

	HEIGHT=$((LINES - 2))
	WIDTH=$((HEIGHT * 2))

else
	echo abcdefghijklmnopqrstuvwxyz
	WIDTH=$((COLS - 2))
	HEIGHT=$((WIDTH / 2))

fi

# Determine clock position
TOP=$(((LINES - HEIGHT)/2))

LEFT=$(((COLS - WIDTH)/2))
MIDDLEX=$((COLS/2))

MIDDLEY=$((LINES/2))
RADIUSX=$((MIDDLEX - LEFT))

RADIUSY=$((MIDDLEY - TOP))

# Print digital clock if requested
if [ ${CONFIG_DIGITAL} = true ]; then

	tput cup $((MIDDLEY + (HEIGHT / 4))) $((MIDDLEX - 4))

	date "+%H:%M:%S"
fi

# Draw border
for deg in $(seq 0 1 90); do

        if [ ${deg} -ge 0 -a ${deg} -le 5 -o ${deg} -ge 25 -a ${deg} -le 35 -o ${deg} -ge 55 -a ${deg} -le 65 -o ${deg} -ge 83 -a ${deg} -le 90 ]; then

                char=x
        else
                char=.
        fi

	drawpoint ${deg} 100 ${char} true

done

# Get time
hour=$(date "+%H" | sed "s/^0//")

min=$(date "+%M" | sed "s/^0//")
sec=$(date "+%S" | sed "s/^0//")

# Hours
for percent in $(seq 0 1 60); do
	deg=$((180 - (((hour * 60 + min) % 720) / 2)))

	if [ ${deg} -lt 0 ]; then
		deg=$((360 + deg))

	fi
	drawpoint ${deg} ${percent} x false
done

# Minutes
for percent in $(seq 0 1 85); do

	deg=$((180 - (min * 6)))
	if [ ${deg} -lt 0 ]; then

		deg=$((360 + deg))
	fi
	drawpoint ${deg} ${percent} + false

done

# Seconds
for percent in $(seq 0 1 85); do

	deg=$((180 - (sec * 6)))
	if [ ${deg} -lt 0 ]; then

		deg=$((360 + deg))
	fi
	drawpoint ${deg} ${percent} . false

done

# Draw center
tput cup ${MIDDLEY} ${MIDDLEX}
echo X

# Set cursor to bottom left corner
tput cup ${LINES} 0

exit 0

Felix und mir war irgendwie langweilig, da haben wir mal angefangen, eine analoge Uhr als Bash-Script zu schreiben . Leider hängt das Ding noch von bc und ncurses ab, aber...