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No further requirement about randomizer / rotation system / DAS / colors / difficulty levels / score / hold, but you may do it if you wish.
=={{header|BASH}}==
<lang BASH>#!/bin/bash
#See [[Tetris Game /Bash]].
# 10.21.2003 xhchen
# http://read.pudn.com/downloads99/sourcecode/game/404711/tetris.sh__.htm
# Copyright (C) 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
#boxes
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[@]} ${box6[@]})
countBox=(1 2 2 2 4 4 4 )
offsetBox=(0 1 3 5 7 11 15)
#score
iScoreEachLevel=50 #be greater than 7
#Runtime data
sig=0
iScore=0
iLevel=0
boxNew=() #new box
cBoxNew=0 #new box color
iBoxNewType=0 #new box type
iBoxNewRotate=0 #new box rotate degree
boxCur=() #current box
cBoxCur=0 #current box color
iBoxCurType=0 #current box type
iBoxCurRotate=0 #current box rotate degree
boxCurX=-1 #current X position
boxCurY=-1 #current Y position
iMap=()
for ((i = 0; i < iTrayHeight * iTrayWidth; i++)); do iMap[$i]=-1; done
RunAsKeyReceiver() {
local pidDisplayer key aKey sig cESC sTTY
pidDisplayer=$1
aKey=(0 0 0)
cESC=`echo -ne "\033"`
cSpace=`echo -ne "\040"`
sTTY=`stty -g`
trap "MyExit;" INT TERM
trap "MyExitNoSub;" $sigExit
echo -ne "\033[?25l"
while :
do
read -s -n 1 key
aKey[0]=${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
}
MyExitNoSub(){
local y
stty $sTTY
((y = iTop + iTrayHeight + 4))
echo -e "\033[?25h\033[${y};0H"
exit
}
MyExit(){
kill -$sigExit $pidDisplayer
MyExitNoSub
}
RunAsDisplayer(){
local sigThis
InitDraw
trap "sig=$sigRotate;" $sigRotate
trap "sig=$sigLeft;" $sigLeft
trap "sig=$sigRight;" $sigRight
trap "sig=$sigDown;" $sigDown
trap "sig=$sigAllDown;" $sigAllDown
trap "ShowExit;" $sigExit
while :
do
for ((i = 0; i < 21 - iLevel; i++))
do
usleep 20000
sigThis=$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
}
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;
}
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 = 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
((x = iLeft + iTrayWidth * 2 + 7))
((y = iTop + 11))
((iScore += line * 2 - 1))
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))
echo -ne "\033[3${cScoreValue}m\033[${y};${x}H${iLevel} "
fi
fi
echo -ne "\033[0m"
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\040\040\033[0m"
fi
done
done
}
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
}
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
}
BoxRight(){
local x s
((x = boxCurX + 1))
if BoxMove $boxCurY $x
then
s=`DrawCurBox 0`
((boxCurX = x))
s=$s`DrawCurBox 1`
echo -ne $s
fi
}
BoxAllDown(){
local k j i x y iDown s
iDown=$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 $s
Box2Map
RandomBox
}
BoxRotate(){
local iCount iTestRotate boxTest j i s
iCount=${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
}
DrawCurBox(){
local i j t bDraw sBox s
bDraw=$1
s=""
if (( bDraw == 0 ))
then
sBox="\040\040"
else
sBox="\040\040"
s=$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]})))
s=$s"\033[${i};${t}H${sBox}"
done
s=$s"\033[0m"
echo -n $s
}
RandomBox(){
local i j t
#change current box
iBoxCurType=${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 ${PPID}
ShowExit
fi
fi
#clear old box
for ((j = 0; j < 4; j++))
do
((i = iTop + 1 + j))
((t = iLeft + 2 * iTrayWidth + 7))
echo -ne "\033[${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 % ${#colorTable[@]}]}))
#display new box
echo -ne "\033[1m\033[7m\033[3${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\040\040"
done
echo -ne "\033[0m"
}
InitDraw(){
clear
RandomBox
RandomBox
local i t1 t2 t3
#draw border
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\040\040"
echo -ne "\033[${t1};${t3}H\040\040"
done
((t2 = iTop + iTrayHeight + 2))
for ((i = 0; i < iTrayWidth + 2; i++))
do
((t1 = i * 2 + iLeft + 1))
echo -ne "\033[${iTrayTop};${t1}H\040\040"
echo -ne "\033[${t2};${t1}H\040\040"
done
echo -ne "\033[0m"
#draw score & level prompt
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"
}
ShowExit(){
local y
((y = iTrayHeight + iTrayTop + 3))
echo -e "\033[${y};0HGameOver!\033[0m"
exit
}
#Start from here.
if [[ $1 != "--go" ]]
then
$0 --go&
RunAsKeyReceiver $!
exit
else
RunAsDisplayer
exit
fi </lang>
=={{header|Java}}==
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