shell版俄罗斯方块

#!/bin/bash
# Tetris Game
# 10.21.2003 xhchen<>

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

#size & position
iLeft=3
iTop=2
((iTrayLeft = iLeft + 2))
((iTrayTop = iTop + 1))
((iTrayWidth = 10))
((iTrayHeight = 15))

#style definition
cBorder=$cGreen
cScore=$cFuchsia
cScoreValue=$cCyan

#control signal
sigRotate=25
sigLeft=26
sigRight=27
sigDown=28
sigAllDown=29
sigExit=30

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)
box=(${box0[@]} ${box1[@]} ${box2[@]} ${box3[@]} ${box4[@]} ${box5[@]} ${box6[@]})
countBox=(1 2 2 2 4 4 4)
offsetBox=(0 1 3 5 7 11 15)

iScoreEachLevel=50   #be greater than 7
#Runtime data
sig=0
iScore=0
iLevel=0
boxNew=()   #new box
cBoxNew=0   #new box color
iBoxNewType=0   #new box type
iBoxNewRotate=0   #new box rotate degree
boxCur=()   #current box
cBoxCur=0   #current box color
iBoxCurType=0   #current box type
iBoxCurRotate=0   #current box rotate degree
boxCurX=-1   #current X position
boxCurY=-1   #current Y position
iMap=()
for ((i = 0; i < iTrayHeight * iTrayWidth; i++)); do iMap[$i]=-1; done

function RunAsKeyReceiver()
{
   local pidDisplayer key aKey sig cESC sTTY

   pidDisplayer=$1
   aKey=(0 0 0)
   cESC=`echo -ne "33"`
   cSpace=`echo -ne "40"`
   sTTY=`stty -g`
   
   trap "MyExit;" INT TERM
   trap "MyExitNoSub;" $sigExit
   
   echo -ne "33[?25l"
   while [[ 1 ]]
   do
      read -s -n 1 key
      aKey[0]=${aKey[1]}
      aKey[1]=${aKey[2]}
      aKey[2]=$key
      sig=0
      if [[ $key == $cESC && ${aKey[1]} == $cESC ]]
      then
         MyExit
      elif [[ ${aKey[0]} == $cESC && ${aKey[1]} == "[" ]]
      then
         if [[ $key == "A" ]]; then sig=$sigRotate
         elif [[ $key == "B" ]]; then sig=$sigDown
         elif [[ $key == "D" ]]; then sig=$sigLeft
         elif [[ $key == "C" ]]; then sig=$sigRight
         fi
      elif [[ $key == "W" || $key == "w" ]]; then sig=$sigRotate
      elif [[ $key == "S" || $key == "s" ]]; then sig=$sigDown
      elif [[ $key == "A" || $key == "a" ]]; then sig=$sigLeft
      elif [[ $key == "D" || $key == "d" ]]; then sig=$sigRight
      elif [[ "[$key]" == "[]" ]]; then sig=$sigAllDown
      elif [[ $key == "Q" || $key == "q" ]]
      then
         MyExit
      fi

      if [[ $sig != 0 ]]
      then
         kill -$sig $pidDisplayer
      fi
   done
}

function MyExitNoSub()
{
   local y
   stty $sTTY
   ((y = iTop + iTrayHeight + 4))
   echo -e "33[?25h33[${y};0H"
   exit
}

function MyExit()
{
   kill -$sigExit $pidDisplayer
   MyExitNoSub
}

function RunAsDisplayer()
{
   local sigThis
   InitDraw
   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
      for ((i = 0; i < 21 - iLevel; i++))
      do
         usleep 20000
         sigThis=$sig
         sig=0
         if ((sigThis == sigRotate)); then BoxRotate;
         elif ((sigThis == sigLeft)); then BoxLeft;
         elif ((sigThis == sigRight)); then BoxRight;
         elif ((sigThis == sigDown)); then BoxDown;
         elif ((sigThis == sigAllDown)); then BoxAllDown;
         fi
      done
      #kill -$sigDown $$
      BoxDown
   done
}

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
         return 1
      fi
      if ((${iMap[y * iTrayWidth + x]} != -1 ))
      then
         return 1
      fi
   done
   return 0;
}

function Box2Map()
{
   local j i x y xp yp line
   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
   
   line=0
   for ((j = iTrayWidth * iTrayHeight; j > 0; j -= iTrayWidth))
   do
      for ((i = j - iTrayWidth; i < j; i++))
      do
         if ((${iMap[$i]} == -1)); then break; fi
      done
      if ((i < j)); then continue; fi
   
      ((line++))   
      for ((i = j - 1; i >= iTrayWidth; i--))
      do
         ((x = i - iTrayWidth))
         iMap[$i]=${iMap[$x]}
      done
      for ((i = 0; i < iTrayWidth; i++))
      do
         iMap[$i]=-1
      done
   done
   
   if ((line == 0)); then return; fi

   ((x = iLeft + iTrayWidth * 2 + 7))
   ((y = iTop + 11))
   ((iScore += line * 2 - 1))
   echo -ne "33[1m33[3${cScoreValue}m33[${y};${x}H${iScore}         "
   if ((iScore % iScoreEachLevel < line * 2 - 1))
   then
      if ((iLevel < 20))
      then
         ((iLevel++))
         ((y = iTop + 14))
         echo -ne "33[3${cScoreValue}m33[${y};${x}H${iLevel}        "
      fi
   fi
   echo -ne "33[0m"

   for ((y = 0; y < iTrayHeight; y++))
   do
      ((yp = y + iTrayTop + 1))
      ((xp = iTrayLeft + 1))
      ((i = y * iTrayWidth))
      echo -ne "33[${yp};${xp}H"
      for ((x = 0; x < iTrayWidth; x++))
      do
         ((j = i + x))
         if ((${iMap[$j]} == -1))
         then
            echo -ne "  "
         else
            echo -ne "33[1m33[3${iMap[$j]}m33[4${iMap[$j]}m[]33[0m"
         fi
      done
   done
}

function BoxDown()
{
   local y s
   ((y = boxCurY + 1))
   if BoxMove $y $boxCurX
   then
      s="`DrawCurBox 0`"
      ((boxCurY = y))
      s="$s`DrawCurBox 1`"
      echo -ne $s
   else
      Box2Map
      RandomBox
   fi
}

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
}

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
}

function BoxAllDown()
{
   local k j i x y iDown s
   iDown=$iTrayHeight
   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`
   ((boxCurY += iDown))
   s=$s`DrawCurBox 1`
   echo -ne $s
   Box2Map
   RandomBox
}

function BoxRotate()
{
   local iCount iTestRotate boxTest j i s
   iCount=${countBox[$iBoxCurType]}
   ((iTestRotate = iBoxCurRotate + 1))
   if ((iTestRotate >= iCount))
   then
      ((iTestRotate = 0))
   fi

   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 $boxCurX
   then
      for ((j = 0; j < 8; j++))
      do
         boxCur[$j]=${boxTest[$j]}
      done
      s=`DrawCurBox 0`
      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
      for ((j = 0; j < 8; j++))
      do
         boxCur[$j]=${boxTest[$j]}
      done
   fi
}

function DrawCurBox()
{
   local i j t bDraw sBox s
   bDraw=$1

   s=""
   if (( bDraw == 0 ))
   then
      sBox="4040"
   else
      sBox="[]"
      s=$s"33[1m33[3${cBoxCur}m33[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]})))
      s=$s"33[${i};${t}H${sBox}"
   done
   s=$s"33[0m"
   echo -n $s
}

function RandomBox()
{
   local i j t

   #change current box
   iBoxCurType=${iBoxNewType}
   iBoxCurRotate=${iBoxNewRotate}
   cBoxCur=${cBoxNew}
   for ((j = 0; j < ${#boxNew[@]}; j++))
   do
      boxCur[$j]=${boxNew[$j]}
   done
   
   if (( ${#boxCur[@]} == 8 ))
   then
      #calculate current box's starting position
      for ((j = 0, t = 4; j < 8; j += 2))
      do
         if ((${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))

      echo -ne `DrawCurBox 1`
      if ! BoxMove $boxCurY $boxCurX
      then
         kill -$sigExit ${PPID}
         ShowExit
      fi
   fi
   
   
   
   
   #clear old box
   for ((j = 0; j < 4; j++))
   do
      ((i = iTop + 1 + j))
      ((t = iLeft + 2 * iTrayWidth + 7))
      echo -ne "33[${i};${t}H        "
   done

   #get a random new box
   ((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[@]}]}))
   
   #display new box
   echo -ne "33[1m33[3${cBoxNew}m33[4${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 "33[${i};${t}H[]"
   done
   echo -ne "33[0m"
}

function InitDraw()
{
   clear
   RandomBox
   RandomBox
   local i t1 t2 t3

   #draw border
   echo -ne "33[1m"
   echo -ne "33[3${cBorder}m33[4${cBorder}m"
   
   ((t2 = iLeft + 1))
   ((t3 = iLeft + iTrayWidth * 2 + 3))
   for ((i = 0; i < iTrayHeight; i++))
   do
      ((t1 = i + iTop + 2))
      echo -ne "33[${t1};${t2}H||"
      echo -ne "33[${t1};${t3}H||"
   done
   
   ((t2 = iTop + iTrayHeight + 2))
   for ((i = 0; i < iTrayWidth + 2; i++))
   do
      ((t1 = i * 2 + iLeft + 1))
      echo -ne "33[${iTrayTop};${t1}H=="
      echo -ne "33[${t2};${t1}H=="
   done
   echo -ne "33[0m"

   
   #draw score & level prompt
   echo -ne "33[1m"
   ((t1 = iLeft + iTrayWidth * 2 + 7))
   ((t2 = iTop + 10))
   echo -ne "33[3${cScore}m33[${t2};${t1}HScore"
   ((t2 = iTop + 11))
   echo -ne "33[3${cScoreValue}m33[${t2};${t1}H${iScore}"
   ((t2 = iTop + 13))
   echo -ne "33[3${cScore}m33[${t2};${t1}HLevel"
   ((t2 = iTop + 14))
   echo -ne "33[3${cScoreValue}m33[${t2};${t1}H${iLevel}"
   echo -ne "33[0m"
}

function ShowExit()
{
   local y
   ((y = iTrayHeight + iTrayTop + 3))
   echo -e "33[${y};0HGameOver!33[0m"
   exit
}

#Start from here.
if [[ $1 != "--show" ]]
then
   $0 --show&
   RunAsKeyReceiver $!
   exit
else
   RunAsDisplayer
   exit
fi