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