You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
shell-project/games/snake.sh

216 lines
6.9 KiB

2 years ago
#!/bin/bash
# filename: snake.sh
# snake game
# Author:
good_game=(
' '
' G A M E O V E R ! '
' '
' Score: '
' press q to quit '
' press n to start a new game '
' press s to change the speed '
' '
);
game_start=(
' '
' ~~~ S N A K E ~~~ '
' '
' Author: LKJ '
' space or enter pause/play '
' q quit at any time '
' s change the speed '
' '
' Press <Enter> to start the game '
' '
);
snake_exit() { #退出游戏
stty echo; #恢复回显
tput rmcup; #恢复屏幕
tput cvvis; #恢复光标
exit 0;
}
draw_gui() { # 画边框
clear;
color="\033[34m*\033[0m";
for (( i = 0; i < $1; i++ )); do
echo -ne "\033[$i;0H${color}";
echo -ne "\033[$i;$2H${color}";
done
for (( i = 0; i <= $2; i++ )); do
echo -ne "\033[0;${i}H${color}";
echo -ne "\033[$1;${i}H${color}";
done
ch_speed 0;
echo -ne "\033[$Lines;$((yscore-10))H\033[36mScores: 0\033[0m";
echo -en "\033[$Lines;$((Cols-50))H\033[33mPress <space> or enter to pause game\033[0m";
}
snake_init() {
Lines=`tput lines`; Cols=`tput cols`; #得到屏幕的长宽
xline=$((Lines/2)); ycols=4; #开始的位置
xscore=$Lines; yscore=$((Cols/2)); #打印分数的位置
xcent=$xline; ycent=$yscore; #中心点位置
xrand=0; yrand=0; #随机点
sumscore=0; liveflag=1; #总分和点存在标记
sumnode=0; foodscore=0; #总共要加长的节点和点的分数
snake="0000 "; #初始化贪吃蛇
pos=(right right right right right); #开始节点的方向
xpt=($xline $xline $xline $xline $xline); #开始的各个节点的x坐标
ypt=(5 4 3 2 1); #开始的各个节点的y坐标
speed=(0.05 0.1 0.15); spk=${spk:-1}; #速度 默认速度
draw_gui $((Lines-1)) $Cols
}
game_pause() { #暂定游戏
echo -en "\033[$Lines;$((Cols-50))H\033[33mGame paused, Use space or enter key to continue\033[0m";
while read -n 1 space; do
[[ ${space:-enter} = enter ]] && \
echo -en "\033[$Lines;$((Cols-50))H\033[33mPress <space> or enter to pause game \033[0m" && return;
[[ ${space:-enter} = q ]] && snake_exit;
done
}
# $1 节点位置
update() { #更新各个节点坐标
case ${pos[$1]} in
right) ((ypt[$1]++));;
left) ((ypt[$1]--));;
down) ((xpt[$1]++));;
up) ((xpt[$1]--));;
esac
}
ch_speed() { #更新速度
[[ $# -eq 0 ]] && spk=$(((spk+1)%3));
case $spk in
0) temp="Fast ";;
1) temp="Medium";;
2) temp="Slow ";;
esac
echo -ne "\033[$Lines;3H\033[33mSpeed: $temp\033[0m";
}
Gooooo() { #更新方向
case ${key:-enter} in
j|J) [[ ${pos[0]} != "up" ]] && pos[0]="down";;
k|K) [[ ${pos[0]} != "down" ]] && pos[0]="up";;
h|H) [[ ${pos[0]} != "right" ]] && pos[0]="left";;
l|L) [[ ${pos[0]} != "left" ]] && pos[0]="right";;
s|S) ch_speed;;
q|Q) snake_exit;;
enter) game_pause;;
esac
}
add_node() { #增加节点
snake="0$snake";
pos=(${pos[0]} ${pos[@]});
xpt=(${xpt[0]} ${xpt[@]});
ypt=(${ypt[0]} ${ypt[@]});
update 0;
local x=${xpt[0]} y=${ypt[0]}
(( ((x>=$((Lines-1)))) || ((x<=1)) || ((y>=Cols)) || ((y<=1)) )) && return 1; #撞墙
for (( i = $((${#snake}-1)); i > 0; i-- )); do
(( ${xpt[0]} == ${xpt[$i]} && ${ypt[0]} == ${ypt[$i]} )) && return 1; #crashed
done
echo -ne "\033[${xpt[0]};${ypt[0]}H\033[32m${snake[@]:0:1}\033[0m";
return 0;
}
mk_random() { #产生随机点和随机数
xrand=$((RANDOM%(Lines-3)+2));
yrand=$((RANDOM%(Cols-2)+2));
foodscore=$((RANDOM%9+1));
echo -ne "\033[$xrand;${yrand}H$foodscore";
liveflag=0;
}
new_game() { #重新开始新游戏
snake_init;
while true; do
read -t ${speed[$spk]} -n 1 key;
[[ $? -eq 0 ]] && Gooooo;
((liveflag==0)) || mk_random;
if (( sumnode > 0 )); then
((sumnode--));
add_node; (($?==0)) || return 1;
else
update 0;
echo -ne "\033[${xpt[0]};${ypt[0]}H\033[32m${snake[@]:0:1}\033[0m";
for (( i = $((${#snake}-1)); i > 0; i-- )); do
update $i;
echo -ne "\033[${xpt[$i]};${ypt[$i]}H\033[32m${snake[@]:$i:1}\033[0m";
(( ${xpt[0]} == ${xpt[$i]} && ${ypt[0]} == ${ypt[$i]} )) && return 1; #crashed
[[ ${pos[$((i-1))]} = ${pos[$i]} ]] || pos[$i]=${pos[$((i-1))]};
done
fi
local x=${xpt[0]} y=${ypt[0]}
(( ((x>=$((Lines-1)))) || ((x<=1)) || ((y>=Cols)) || ((y<=1)) )) && return 1; #撞墙
(( x==xrand && y==yrand )) && ((liveflag=1)) && ((sumnode+=foodscore)) && ((sumscore+=foodscore));
echo -ne "\033[$xscore;$((yscore-2))H$sumscore";
done
}
print_good_game() {
local x=$((xcent-4)) y=$((ycent-25))
for (( i = 0; i < 8; i++ )); do
echo -ne "\033[$((x+i));${y}H\033[45m${good_game[$i]}\033[0m";
done
echo -ne "\033[$((x+3));$((ycent+1))H\033[45m${sumscore}\033[0m";
}
print_game_start() {
snake_init;
local x=$((xcent-5)) y=$((ycent-25))
for (( i = 0; i < 10; i++ )); do
echo -ne "\033[$((x+i));${y}H\033[45m${game_start[$i]}\033[0m";
done
while read -n 1 anykey; do
[[ ${anykey:-enter} = enter ]] && break;
[[ ${anykey:-enter} = q ]] && snake_exit;
[[ ${anykey:-enter} = s ]] && ch_speed;
done
while true; do
new_game;
print_good_game;
while read -n 1 anykey; do
[[ $anykey = n ]] && break;
[[ $anykey = q ]] && snake_exit;
done
done
}
game_main() {
trap 'snake_exit;' SIGTERM SIGINT;
stty -echo; #取消回显
tput civis; #隐藏光标
tput smcup; clear; #保存屏幕并清屏
print_game_start; #开始游戏
}
game_main;