BASH贪吃蛇

写得烂，别喷



#!/usr/bin/env bash
#set -x
#set -e

cmd=$1 #捕获第一个参数
pid=$$ #当前脚本的进程pid
msg=msg #消息管道文件
space=0 #空白
wall='x' #墙壁
my_box='B' #我的箱子other_box='O' #其他的箱子
box_length=30 #地图宽
box_height=20 #地图高
#颜色定义
color_red=31
color_green=32
color_yellow=33
color_blue=34
color_purple=35
color_white=37
#贪吃蛇的坐标
snake_x=(10 10 10)
snake_y=(10 11 12)
old_snake_x=("${snake_x[@]}")
old_snake_y=("${snake_y[@]}")
#最近一次输入方向
last_direct='up'
#地图
old_map=( x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x
x 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 x
x 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 x
x 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 x
x 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 x
x 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 x
x 0 0 M 0 0 0 0 0 0 0 M 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 x
x 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 M 0 x
x 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 x
x 0 0 0 0 0 0 M 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 x
x 0 0 0 0 0 0 0 0 0 B B B 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 x
x 0 0 0 M 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 x
x 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 x
x 0 0 0 0 0 0 0 0 0 M 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 x
x 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 x
x 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 x
x 0 0 0 0 0 0 0 0 0 0 0 0 0 M 0 0 0 0 0 0 0 0 0 0 0 0 0 0 x
x 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 x
x 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 x
x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x )

#退出函数
logout()
{
old_map=( x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x
x 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 x
x 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 x
x 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 x
x 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 x
x 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 x
x 0 0 o o 0 0 0 o 0 0 0 0 o 0 o o o o o o 0 0 o o o o o 0 x
x 0 o 0 0 o 0 0 o 0 0 0 0 o 0 o 0 0 0 0 0 0 0 o 0 0 0 o 0 x
x o 0 0 0 0 o 0 o 0 0 0 0 o 0 o 0 0 0 0 0 0 0 o 0 0 0 o 0 x
x o 0 0 0 0 o 0 o 0 0 0 0 o 0 o 0 0 0 0 0 0 0 o o o o o 0 x
x o 0 0 0 0 o 0 o 0 0 0 0 o 0 o o o o o o 0 0 o o 0 0 0 0 x
x o 0 0 0 0 o 0 o 0 0 0 o 0 0 o 0 0 0 0 0 0 0 o 0 o 0 0 0 x
x 0 o 0 0 o 0 0 0 o 0 o 0 0 0 o 0 0 0 0 0 0 0 o 0 0 o 0 0 x
x 0 0 o o 0 0 0 0 0 o 0 0 0 0 o o o o o o 0 0 o 0 0 0 o 0 x
x 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 x
x 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 x
x 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 x
x 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 x
x 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 x
x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x )
if [[ $pid != "" ]];then
showAllMap
pids=`ps -ef | grep snake | grep bash | awk '{print $2}'`
kill -SIGINT $pids > /dev/null 2>&1
fi
exit
}

#退出游戏
exitGame(){
pids=`ps -ef | grep snake | grep bash | awk '{print $2}'`
kill -SIGINT $pids > /dev/null 2>&1
}

#在某个点上显示数据
showPoint(){
x=`expr $1 + 1`
y=`expr $2 + 1`
content="$3"
color=$4
if [[ ! -n "$color" ]] ;then
color=$color_red
fi
#颜色
if [[ $content == 'B' ]];then
color=$color_green
elif [[ $content == 'M' ]];then
color=$color_yellow
elif [[ $content == '0' ]];then
content=' '
fi
loc="\033["$x";"$y"H\033["$color"m$content\033[0m"
echo -e "$loc"
}

#显示变化的地图信息
showChangedMap(){
snake_length=`expr ${#old_snake_x[@]}`
for ((i=0;i<$snake_length;i++))
do
tmp_x=${old_snake_x[$i]}
tmp_y=${old_snake_y[$i]}
showPoint $tmp_x $tmp_y ' '
done

snake_length=`expr ${#snake_x[@]}`
for ((i=0;i<$snake_length;i++))
do
tmp_x=${snake_x[$i]}
tmp_y=${snake_y[$i]}
showPoint $tmp_x $tmp_y 'B'
done
}

#显示完整地图
showAllMap(){
for ((i=0;i<$box_height;i++))
do
for ((j=0;j<$box_length;j++))
do
point=`expr $i \* $box_length + $j`
showPoint $i $j "${old_map[$point]}"
done
done
}

#初始化函数，创建进程间管道通信
init()
{
if [[ ! -p $msg ]];then
mkfifo $msg
fi
showAllMap

if [[ $cmd != "" ]];then
pid=""
fi
}

#写数据到管道
put()
{
data=$1
echo $data > $msg
}

#处理贪吃蛇移动
process()
{
#暂存输入
cmd=$1
grow=$2
#蛇头
cur_x=${snake_x[0]}
cur_y=${snake_y[0]}
#新的位置
new_x=$cur_x
new_y=$cur_y
#复制蛇变化情况
old_snake_x=("${snake_x[@]}")
old_snake_y=("${snake_y[@]}")

if [[ $cmd == 'up' ]];then
new_x=`expr $cur_x - 1`
if [[ $new_x -eq 0 ]];then
exitGame
fi
elif [[ $cmd == 'down' ]];then
new_x=`expr $cur_x + 1`
if [[ $new_x -eq `expr $box_height - 1` ]];then
exitGame
fi
elif [[ $cmd == 'left' ]];then
new_y=`expr $cur_y - 1`
if [[ $new_y -eq 0 ]];then
exitGame
fi
elif [[ $cmd == 'right' ]];then
new_y=`expr $cur_y + 1`
if [[ $new_y -eq `expr $box_length - 1` ]];then
exitGame
fi
fi

#如果需要生长
position=`expr $new_x \* $box_length + $new_y`
if [[ $grow == 'grow' ]] || [[ ${old_map[$position]} == 'M' ]] ;then
snake_x=(0 "${snake_x[@]}")
snake_y=(0 "${snake_y[@]}")
fi

snake_x[0]=$new_x
snake_y[0]=$new_y

if [[ $cmd != 'grow' ]];then
snake_length=`expr ${#old_snake_x[@]}`
for ((i=1;i<$snake_length;i++))
do
snake_x[$i]=${old_snake_x[`expr $i - 1`]}
snake_y[$i]=${old_snake_y[`expr $i - 1`]}
done
fi
showChangedMap
}

#从管道读取数据
get()
{
while true
do
if read line < $msg ;then

head_x=${snake_x[0]}
head_y=${snake_y[0]}

if [[ $line == 'up' ]] && [[ $last_direct != 'down' ]] ;then
process $line
last_direct=$line
elif [[ $line == 'down' ]] && [[ $last_direct != 'up' ]] ;then
process $line
last_direct=$line
elif [[ $line == 'left' ]] && [[ $last_direct != 'right' ]] ;then
process $line
last_direct=$line
elif [[ $line == 'right' ]] && [[ $last_direct != 'left' ]] ;then
process $line
last_direct=$line
elif [[ $line == 'co' ]];then
loc=`expr $head_x \* $box_length + $head_y`
if [[ ${old_map[$loc]} == 'M' ]];then
process $last_direct 'grow'
else
process $last_direct
fi
elif [[ $line == 'feed' ]];then
food_x=`echo "$RANDOM%20" | bc`
food_y=`echo "$RANDOM%30" | bc`

if [[ $food_x -eq 0 ]] ;then
food_x=1
fi

if [[ $food_y -eq 0 ]];then
food_y=1
fi

food_position=`expr $food_x \* $box_length + $food_y`
box_map[$food_position]='M'
showPoint $food_x $food_y 'M'
fi
fi
done
}

#每秒钟发送信息
everySecondSend(){
count=0
while true
do
put "co"
count=`expr $count + 1`
rem=`echo "$count%2" | bc`
if [[ $rem -eq 0 ]];then
put "feed"
fi
sleep 2
done
}

#ctl+c 信号捕获，跳入logout函数
trap "logout" SIGINT
init

if [[ $cmd == 'show' ]];then
get &
elif [[ $cmd == 'signal' ]];then
everySecondSend &
else
#开启显示进程
bash $0 'show'
#每秒钟前进一步
bash $0 'signal'

inputs=(0 1 2)
while true
do
read -s -n 1 key
inputs[0]=${inputs[1]}
inputs[1]=${inputs[2]}
inputs[2]=$key
if [ ${inputs[1]} == '[' ] ;then
if [ ${inputs[2]} == 'A' ] ;then
put "up"
elif [ ${inputs[2]} == 'B' ] ;then
put "down"
elif [ ${inputs[2]} == 'C' ] ;then
put "right"
elif [ ${inputs[2]} == 'D' ] ;then
put "left"
fi
elif [ $key == 'f' ] ;then
echo "fire the whole"
fi
done
fi