#!/bin/bash
if [[ $1 != "" ]]
then
cat << END
BashInvaders!
by Vidar 'koala_man' Holen
www.vidarholen.net
Originally an entry in the #linux.no 1KiB compo (thus the ugly source)
This is a pre-trim version with colors and proper tmp files. All bash.
Released under the GNU General Public License.
Control your ship with J and L, shoot with K.
Quit with Q or sigint.
Requires mktemp and sleep with fractions.
END
exit 0
fi
cd /tmp
e=echo
c=clear
r=return
E="$e -ne "
A=$E\\033[
m() { $A$2\;$1\H
}
f() { $A\1\;3$1\m
}
trap z=SigInt SIGINT
g() {
$e ${K[$(($2*8+$1))]}
}
s() {
K[$(($2*8+$1))]=$3
}
u() {
[ $T = 0 ] && $r 0
m $S $((--T))
$E `f 3`"!"
x=$((S-Y))
y=$((T-Z))
[ $((y%3)) = 0 -a $((x%6)) -lt 4 ] || $r 0
: $((y/=3)) $((x/=6))
[ "`g $x $y`" = 1 -a $x -le $o -a $x -ge $n -a $y -le $q -a $y -ge 0 ] || $r 0
[ $Q = 1 ] && z="You win!"
s $x $y 0
: $((Q--))
T=0
$r 1
}
a() {
w n +
w o -
h
}
w() {
d=0
for (( I=0; I<=q; I++ )) {
[ `g $(($1)) $I` = 1 ] && D=1
}
[ $D = 0 ] && : $(($1$2=1))
}
h() {
for (( I=q; I>=0; I--)) {
for (( J=n; J<=o; J++)) {
[ `g $J $I` = 1 ] && q=$I && $r
}
}
}
j() {
while read -n 1 S
do
$e $S > $M
done
}
G=`mktemp`
L=`mktemp`
M=`mktemp`
N=`mktemp`
X=40
n=0
o=7
q=2
T=0
Y=2
Z=2
U=2
W=0
for (( Q=0; Q<24; Q++)) {
K[$Q]=1
}
j 0<&0 &
B=$!
until [ "$z" ]
do
: $((W++))
if [ -f $M ]
then
i=$(<$M)
rm $M
case "$i" in
q) z="Quit" ;;
j) X=$(($X-3)) ;;
l) X=$(($X+3)) ;;
k) [ $T = 0 ] && S=$((X+1)) && T=22
;;
esac
fi
rm $N
exec > $N
for (( J=0; J<=q; J++)) {
for (( I=n; I<=o; I++)) {
[ `g $I $J` = 1 ] && m $((I*6+Y)) $((J*3+Z)) && $e `f 4`/OO\\
}
}
m $X 23
$e `f 2`"/|\\"
[ $T != 0 ] && u
a
m 0 0
exec > `tty`
$c
cat $N
sleep .1
[ $((W%2)) = 0 ] && : $((Y+=U)) && if [ $((Y+n*6)) -lt 2 -o $((Y+o*6)) -gt 75 ]
then
: $((U=-U)) $((Z+=2))
[ $((Z+q*3)) -le 20 ] || z="You lose!"
fi
done
$c
$e $z
rm $G $L $M $N $F &> /dev/null
kill $B