linux shell俄罗斯方块

 #!/bin/bash

 #颜色定义
 cRed=1
 cGreen=2
 cYellow=3
 cBlue=4
 cFuchsia=5
 cCyan=6
 cWhite=7
 colorTable=($cRed $cGreen $cYellow $cBlue $cFuchsia $cCyan $cWhite)

 #位置和大小
 iLeft=3
 iTop=2
 ((iTrayLeft = iLeft + 2))
 ((iTrayTop = iTop + 1))
 ((iTrayWidth = 10))
 ((iTrayHeight = 15))

 #颜色设置
 cBorder=$cGreen
 cScore=$cFuchsia
 cScoreValue=$cCyan

 #控制信号
 #改游戏使用两个进程，一个用于接收输入，一个用于游戏流程和显示界面;
 #当前者接收到上下左右等按键时，通过向后者发送signal的方式通知后者。
 sigRotate=25
 sigLeft=26
 sigRight=27
 sigDown=28
 sigAllDown=29
 sigExit=30

 #七中不同的方块的定义
 #通过旋转，每种方块的显示的样式可能有几种
 box0=(0 0 0 1 1 0 1 1)
 box1=(0 2 1 2 2 2 3 2 1 0 1 1 1 2 1 3)
 box2=(0 0 0 1 1 1 1 2 0 1 1 0 1 1 2 0)
 box3=(0 1 0 2 1 0 1 1 0 0 1 0 1 1 2 1)
 box4=(0 1 0 2 1 1 2 1 1 0 1 1 1 2 2 2 0 1 1 1 2 0 2 1 0 0 1 0 1 1 1 2)
 box5=(0 1 1 1 2 1 2 2 1 0 1 1 1 2 2 0 0 0 0 1 1 1 2 1 0 2 1 0 1 1 1 2)
 box6=(0 1 1 1 1 2 2 1 1 0 1 1 1 2 2 1 0 1 1 0 1 1 2 1 0 1 1 0 1 1 1 2)
 #所有其中方块的定义都放到box变量中
 box=(${box0[@]} ${box1[@]} ${box2[@]} ${box3[@]} ${box4[@]} ${box5[@]} ${box6[@]})
 #各种方块旋转后可能的样式数目
 countBox=(1 2 2 2 4 4 4)
 #各种方块再box数组中的偏移
 offsetBox=(0 1 3 5 7 11 15)

 #每提高一个速度级需要积累的分数
 iScoreEachLevel=50  #be greater than 7

 #运行时数据
 sig=0       #接收到的signal
 iScore=0    #总分
 iLevel=0    #速度级
 boxNew=()   #新下落的方块的位置定义
 cBoxNew=0   #新下落的方块的颜色
 iBoxNewType=0   #新下落的方块的种类
 iBoxNewRotate=0 #新下落的方块的旋转角度
 boxCur=()   #当前方块的位置定义
 cBoxCur=0   #当前方块的颜色
 iBoxCurType=0   #当前方块的种类
 iBoxCurRotate=0 #当前方块的旋转角度
 boxCurX=-1  #当前方块的x坐标位置
 boxCurY=-1  #当前方块的y坐标位置
 iMap=()     #背景方块图表


 #接收输入的进程的主函数
 function RunAsKeyReceiver()
 {
     local pidDisplayer key aKey sig cESC sTTY

     pidDisplayer=$1
     aKey=(0 0 0)

     cESC=`echo -ne "\033"`
     cSpace=`echo -ne "\040"`

     #保存终端属性。在read -s读取终端键时，终端的属性会被暂时改变。
     #如果在read -s时程序被不幸杀掉，可能会导致终端混乱，
     #需要在程序退出时恢复终端属性。
     sTTY=`stty -g`

     #捕捉退出信号
     trap "MyExit;" INT TERM
     trap "MyExitNoSub;" $sigExit

     #隐藏光标
     echo -ne "\033[?25l"


     while (( 1 ))
     do
         #读取输入。注-s不回显，-n读到一个字符立即返回
         read -s -n 1 key

         aKey[0]=${aKey[1]}
         aKey[1]=${aKey[2]}
         aKey[2]=$key
         sig=0

         #判断输入了何种键
         if [[ $key == $cESC && ${aKey[1]} == $cESC ]]
         then
             #ESC键
             MyExit
         elif [[ ${aKey[0]} == $cESC && ${aKey[1]} == "[" ]]
         then
             if [[ $key == "A" ]]; then sig=$sigRotate   #<向上键>
             elif [[ $key == "B" ]]; then sig=$sigDown   #<向下键>
             elif [[ $key == "D" ]]; then sig=$sigLeft   #<向左键>
             elif [[ $key == "C" ]]; then sig=$sigRight  #<向右键>
             fi
         elif [[ $key == "W" || $key == "w" ]]; then sig=$sigRotate  #W, w
         elif [[ $key == "S" || $key == "s" ]]; then sig=$sigDown    #S, s
         elif [[ $key == "A" || $key == "a" ]]; then sig=$sigLeft    #A, a
         elif [[ $key == "D" || $key == "d" ]]; then sig=$sigRight   #D, d
         elif [[ "[$key]" == "[]" ]]; then sig=$sigAllDown   #空格键
         elif [[ $key == "Q" || $key == "q" ]]           #Q, q
         then
             MyExit
         fi

         if [[ $sig != 0 ]]
         then
             #向另一进程发送消息
             kill -$sig $pidDisplayer
         fi
     done
 }

 #退出前的恢复
 function MyExitNoSub()
 {
     local y

     #恢复终端属性
     stty $sTTY
     ((y = iTop + iTrayHeight + 4))

     #显示光标
     echo -e "\033[?25h\033[${y};0H"
     exit
 }


 function MyExit()
 {
     #通知显示进程需要退出
     kill -$sigExit $pidDisplayer

     MyExitNoSub
 }


 #处理显示和游戏流程的主函数
 function RunAsDisplayer()
 {
     local sigThis
     InitDraw

     #挂载各种信号的处理函数
     trap "sig=$sigRotate;" $sigRotate
     trap "sig=$sigLeft;" $sigLeft
     trap "sig=$sigRight;" $sigRight
     trap "sig=$sigDown;" $sigDown
     trap "sig=$sigAllDown;" $sigAllDown
     trap "ShowExit;" $sigExit

     while (( 1 ))
     do
         #根据当前的速度级iLevel不同，设定相应的循环的次数
         for ((i = 0; i < 21 - iLevel; i++))
         do
             sleep 0.02
             sigThis=$sig
             sig=0

             #根据sig变量判断是否接受到相应的信号
             if ((sigThis == sigRotate)); then BoxRotate;    #旋转
             elif ((sigThis == sigLeft)); then BoxLeft;  #左移一列
             elif ((sigThis == sigRight)); then BoxRight;    #右移一列
             elif ((sigThis == sigDown)); then BoxDown;  #下落一行
             elif ((sigThis == sigAllDown)); then BoxAllDown;    #下落到底
             fi
         done
         #kill -$sigDown $$
         BoxDown #下落一行
     done
 }


 #BoxMove(y, x), 测试是否可以把移动中的方块移到(x, y)的位置, 返回0则可以, 1不可以
 function BoxMove()
 {
     local j i x y xTest yTest
     yTest=$1
     xTest=$2
     for ((j = 0; j < 8; j += 2))
     do
         ((i = j + 1))
         ((y = ${boxCur[$j]} + yTest))
         ((x = ${boxCur[$i]} + xTest))
         if (( y < 0 || y >= iTrayHeight || x < 0 || x >= iTrayWidth))
         then
             #撞到墙壁了
             return 1
         fi
         if ((${iMap[y * iTrayWidth + x]} != -1 ))
         then
             #撞到其他已经存在的方块了
             return 1
         fi
     done
     return 0;
 }


 #将当前移动中的方块放到背景方块中去,
 #并计算新的分数和速度级。(即一次方块落到底部)
 function Box2Map()
 {
     local j i x y xp yp line

     #将当前移动中的方块放到背景方块中去
     for ((j = 0; j < 8; j += 2))
     do
         ((i = j + 1))
         ((y = ${boxCur[$j]} + boxCurY))
         ((x = ${boxCur[$i]} + boxCurX))
         ((i = y * iTrayWidth + x))
         iMap[$i]=$cBoxCur
     done

     #消去可被消去的行
     line=0
     for ((j = 0; j < iTrayWidth * iTrayHeight; j += iTrayWidth))
     do
         for ((i = j + iTrayWidth - 1; i >= j; i--))
         do
             if ((${iMap[$i]} == -1)); then break; fi
         done
         if ((i >= j)); then continue; fi

         ((line++))
         for ((i = j - 1; i >= 0; i--))
         do
             ((x = i + iTrayWidth))
             iMap[$x]=${iMap[$i]}
         done
         for ((i = 0; i < iTrayWidth; i++))
         do
             iMap[$i]=-1
         done
     done

     if ((line == 0)); then return; fi

     #根据消去的行数line计算分数和速度级
     ((x = iLeft + iTrayWidth * 2 + 7))
     ((y = iTop + 11))
     ((iScore += line * 2 - 1))
     #显示新的分数
     echo -ne "\033[1m\033[3${cScoreValue}m\033[${y};${x}H${iScore}   "
     if ((iScore % iScoreEachLevel < line * 2 - 1))
     then
         if ((iLevel < 20))
         then
             ((iLevel++))
             ((y = iTop + 14))
             #显示新的速度级
             echo -ne "\033[3${cScoreValue}m\033[${y};${x}H${iLevel} "
         fi
     fi
     echo -ne "\033[0m"


     #重新显示背景方块
     for ((y = 0; y < iTrayHeight; y++))
     do
         ((yp = y + iTrayTop + 1))
         ((xp = iTrayLeft + 1))
         ((i = y * iTrayWidth))
         echo -ne "\033[${yp};${xp}H"
         for ((x = 0; x < iTrayWidth; x++))
         do
             ((j = i + x))
             if ((${iMap[$j]} == -1))
             then
                 echo -ne "  "
             else
                 echo -ne "\033[1m\033[7m\033[3${iMap[$j]}m\033[4${iMap[$j]}m[]\033[0m"
             fi
         done
     done
 }


 #下落一行
 function BoxDown()
 {
     local y s
     ((y = boxCurY + 1)) #新的y坐标
     if BoxMove $y $boxCurX  #测试是否可以下落一行
     then
         s="`DrawCurBox 0`"  #将旧的方块抹去
         ((boxCurY = y))
         s="$s`DrawCurBox 1`"    #显示新的下落后方块
         echo -ne $s
     else
         #走到这儿, 如果不能下落了
         Box2Map     #将当前移动中的方块贴到背景方块中
         RandomBox   #产生新的方块
     fi
 }

 #左移一列
 function BoxLeft()
 {
     local x s
     ((x = boxCurX - 1))
     if BoxMove $boxCurY $x
     then
         s=`DrawCurBox 0`
         ((boxCurX = x))
         s=$s`DrawCurBox 1`
         echo -ne $s
     fi
 }

 #右移一列
 function BoxRight()
 {
     local x s
     ((x = boxCurX + 1))
     if BoxMove $boxCurY $x
     then
         s=`DrawCurBox 0`
         ((boxCurX = x))
         s=$s`DrawCurBox 1`
         echo -ne $s
     fi
 }


 #下落到底
 function BoxAllDown()
 {
     local k j i x y iDown s
     iDown=$iTrayHeight

     #计算一共需要下落多少行
     for ((j = 0; j < 8; j += 2))
     do
         ((i = j + 1))
         ((y = ${boxCur[$j]} + boxCurY))
         ((x = ${boxCur[$i]} + boxCurX))
         for ((k = y + 1; k < iTrayHeight; k++))
         do
             ((i = k * iTrayWidth + x))
             if (( ${iMap[$i]} != -1)); then break; fi
         done
         ((k -= y + 1))
         if (( $iDown > $k )); then iDown=$k; fi
     done

     s=`DrawCurBox 0`    #将旧的方块抹去
     ((boxCurY += iDown))
     s=$s`DrawCurBox 1`  #显示新的下落后的方块
     echo -ne $s
     Box2Map     #将当前移动中的方块贴到背景方块中
     RandomBox   #产生新的方块
 }


 #旋转方块
 function BoxRotate()
 {
     local iCount iTestRotate boxTest j i s
     iCount=${countBox[$iBoxCurType]}    #当前的方块经旋转可以产生的样式的数目

     #计算旋转后的新的样式
     ((iTestRotate = iBoxCurRotate + 1))
     if ((iTestRotate >= iCount))
     then
         ((iTestRotate = 0))
     fi

     #更新到新的样式, 保存老的样式(但不显示)
     for ((j = 0, i = (${offsetBox[$iBoxCurType]} + $iTestRotate) * 8; j < 8; j++, i++))
     do
         boxTest[$j]=${boxCur[$j]}
         boxCur[$j]=${box[$i]}
     done

     if BoxMove $boxCurY $boxCurX    #测试旋转后是否有空间放的下
     then
         #抹去旧的方块
         for ((j = 0; j < 8; j++))
         do
             boxCur[$j]=${boxTest[$j]}
         done
         s=`DrawCurBox 0`

         #画上新的方块
         for ((j = 0, i = (${offsetBox[$iBoxCurType]} + $iTestRotate) * 8; j < 8; j++, i++))
         do
             boxCur[$j]=${box[$i]}
         done
         s=$s`DrawCurBox 1`
         echo -ne $s
         iBoxCurRotate=$iTestRotate
     else
         #不能旋转，还是继续使用老的样式
         for ((j = 0; j < 8; j++))
         do
             boxCur[$j]=${boxTest[$j]}
         done
     fi
 }


 #DrawCurBox(bDraw), 绘制当前移动中的方块, bDraw为1, 画上, bDraw为0, 抹去方块。
 function DrawCurBox()
 {
     local i j t bDraw sBox s
     bDraw=$1

     s=""
     if (( bDraw == 0 ))
     then
         sBox="\040\040"
     else
         sBox="[]"
         s=$s"\033[1m\033[7m\033[3${cBoxCur}m\033[4${cBoxCur}m"
     fi

     for ((j = 0; j < 8; j += 2))
     do
         ((i = iTrayTop + 1 + ${boxCur[$j]} + boxCurY))
         ((t = iTrayLeft + 1 + 2 * (boxCurX + ${boxCur[$j + 1]})))
         #\33[y;xH, 光标到(x, y)处
         s=$s"\033[${i};${t}H${sBox}"
     done
     s=$s"\033[0m"
     echo -n $s
 }


 #更新新的方块
 function RandomBox()
 {
     local i j t

     #更新当前移动的方块
     iBoxCurType=${iBoxNewType}
     iBoxCurRotate=${iBoxNewRotate}
     cBoxCur=${cBoxNew}
     for ((j = 0; j < ${#boxNew[@]}; j++))
     do
         boxCur[$j]=${boxNew[$j]}
     done


     #显示当前移动的方块
     if (( ${#boxCur[@]} == 8 ))
     then
         #计算当前方块该从顶端哪一行"冒"出来
         for ((j = 0, t = 4; j < 8; j += 2))
         do
             if ((${boxCur[$j]} < t)); then t=${boxCur[$j]}; fi
         done
         ((boxCurY = -t))
         for ((j = 1, i = -4, t = 20; j < 8; j += 2))
         do
             if ((${boxCur[$j]} > i)); then i=${boxCur[$j]}; fi
             if ((${boxCur[$j]} < t)); then t=${boxCur[$j]}; fi
         done
         ((boxCurX = (iTrayWidth - 1 - i - t) / 2))

         #显示当前移动的方块
         echo -ne `DrawCurBox 1`

         #如果方块一出来就没处放，Game over!
         if ! BoxMove $boxCurY $boxCurX
         then
             kill -$sigExit ${PPID}
             ShowExit
         fi
     fi



     #清除右边预显示的方块
     for ((j = 0; j < 4; j++))
     do
         ((i = iTop + 1 + j))
         ((t = iLeft + 2 * iTrayWidth + 7))
         echo -ne "\033[${i};${t}H        "
     done

     #随机产生新的方块
     ((iBoxNewType = RANDOM % ${#offsetBox[@]}))
     ((iBoxNewRotate = RANDOM % ${countBox[$iBoxNewType]}))
     for ((j = 0, i = (${offsetBox[$iBoxNewType]} + $iBoxNewRotate) * 8; j < 8; j++, i++))
     do
         boxNew[$j]=${box[$i]};
     done

     ((cBoxNew = ${colorTable[RANDOM % ${#colorTable[@]}]}))

     #显示右边预显示的方块
     echo -ne "\033[1m\033[7m\033[3${cBoxNew}m\033[4${cBoxNew}m"
     for ((j = 0; j < 8; j += 2))
     do
         ((i = iTop + 1 + ${boxNew[$j]}))
         ((t = iLeft + 2 * iTrayWidth + 7 + 2 * ${boxNew[$j + 1]}))
         echo -ne "\033[${i};${t}H[]"
     done
     echo -ne "\033[0m"
 }


 #初始绘制
 function InitDraw()
 {
     clear
     RandomBox   #随机产生方块，这时右边预显示窗口中有方快了
     RandomBox   #再随机产生方块，右边预显示窗口中的方块被更新，原先的方块将开始下落
     local i t1 t2 t3

     #显示边框
     echo -ne "\033[1m"
     echo -ne "\033[3${cBorder}m\033[4${cBorder}m"

     ((t2 = iLeft + 1))
     ((t3 = iLeft + iTrayWidth * 2 + 3))
     for ((i = 0; i < iTrayHeight; i++))
     do
         ((t1 = i + iTop + 2))
         echo -ne "\033[${t1};${t2}H||"
         echo -ne "\033[${t1};${t3}H||"
     done

     ((t2 = iTop + iTrayHeight + 2))
     for ((i = 0; i < iTrayWidth + 2; i++))
     do
         ((t1 = i * 2 + iLeft + 1))
         echo -ne "\033[${iTrayTop};${t1}H=="
         echo -ne "\033[${t2};${t1}H=="
     done
     echo -ne "\033[0m"


     #显示"Score"和"Level"字样
     echo -ne "\033[1m"
     ((t1 = iLeft + iTrayWidth * 2 + 7))
     ((t2 = iTop + 10))
     echo -ne "\033[3${cScore}m\033[${t2};${t1}HScore"
     ((t2 = iTop + 11))
     echo -ne "\033[3${cScoreValue}m\033[${t2};${t1}H${iScore}"
     ((t2 = iTop + 13))
     echo -ne "\033[3${cScore}m\033[${t2};${t1}HLevel"
     ((t2 = iTop + 14))
     echo -ne "\033[3${cScoreValue}m\033[${t2};${t1}H${iLevel}"
     echo -ne "\033[0m"
 }


 #退出时显示GameOVer!
 function ShowExit()
 {
     local y
     ((y = iTrayHeight + iTrayTop + 3))
     echo -e "\033[${y};0HGameOver!\033[0m"
     exit
 }


 #初始化所有背景方块为-1, 表示没有方块
 for ((i = 0; i < iTrayHeight * iTrayWidth; i++))
 do
     iMap[$i]=-1
 done


 #游戏主程序在这儿开始.
 if [[ $1 != "--show" ]]
 then
     bash $0 --show& #以参数--show将本程序再运行一遍
     RunAsKeyReceiver $! #以上一行产生的进程的进程号作为参数
     exit
 else
     #当发现具有参数--show时，运行显示函数
     RunAsDisplayer
     exit
 fi