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859441ead1cc995525b6c6dea377155112c07380
scorch_src/game.asm
T
Pecusx 859441ead1 Meteors during flight of bullets.
2023-09-04 12:39:56 +02:00

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.IF *>0 ;this is a trick that prevents compiling this file alone
; All main procedures of the game not dependent on hardware (I hope) :)
START
jsr MakeDarkScreen
; Startup sequence
jsr Initialize
;jsr GameOverScreen ; only for test !!!
RMTSong song_main_menu
jsr Options ;startup screen
jsr SetVariablesFromOptions
jsr MakeDarkScreen
bit escFlag
bmi START
jsr EnterPlayerNames
jsr MakeDarkScreen
bit escFlag
bmi START
jsr RandomizeSequence
; for the round #1 shooting sequence is random
MainGameLoop
jsr SetWallsType
; first set default barrel lengths (fix for Long Schlong activation :) )
; we must do it before purchase/activate
; and set Auto Defense to off
jsr SetStandardBarrels
jsr CallPurchaseForEveryTank
jsr MakeDarkScreen
bit escFlag
bmi START
jsr GetRandomWind
jsr RoundInit
jsr MainRoundLoop
mva #$ff MeteorsFlag
bit escFlag
jvs GoGameOver
bmi START
jsr CalculateGains
jsr SortSequence
mva #0 TankNr ;
sta COLBAKS ; set background color to black
jsr SetJoystickPort ; set joystick port for player
; Hide all (easier than hide last ;) ) tanks
jsr cleartanks ; A=0
; here gains and losses should be displayed (dollars)
; finally we have changed our minds and money of players
; is displayed only in weapons shop
; Results are number of other deaths
; before the player dies itself
RmtSong song_round_over
jsr DisplayResults
jsr DemoModeOrKey
jsr MakeDarkScreen
lda GameIsOver
beq NoGameOverYet
GoGameOver
jsr GameOverScreen
jmp START
NoGameOverYet
inc CurrentRoundNr
mva #sfx_silencer sfx_effect
jmp MainGameLoop
;--------------------------------------------------
.proc CalculateGains
;--------------------------------------------------
; add gains and substract losses
; gain is what player gets for lost energy of opponents
; energy lost by opponents is added during Round and
; little below in source, multiplied by 2 to get "dollars".
; By analogy, loss is energy that given player losses during
; each Round.
; Important! If player has 10 energy and gets a central hit
; from nuke that would take 90 energy points, his loss
; is 90, not 10
ldx NumberOfPlayers
dex
CalculateGainsLoop
; adding the remaining energy of the tank to gain
; winner gets more ! :)
lda Energy,x
adc gainL,x
sta gainL,x
bcc @+
inc gainH,x
@
; add gain * 2
asl gainL,x
rol gainH,x
clc
lda moneyL,x
adc gainL,x
sta moneyL,x
lda moneyH,x
adc gainH,x
sta moneyH,x
; substract lose
; if lose is greater than money then zero money
lda moneyH,x
cmp loseH,x
bcc zeromoney
bne substractlose
lda moneyL,x
cmp loseL,x
bcc zeromoney
substractlose
sec
lda moneyL,x
sbc loseL,x
sta moneyL,x
lda moneyH,x
sbc loseH,x
sta moneyH,x
jmp skipzeroing
zeromoney
lda #0
sta moneyL,x
sta moneyH,x
skipzeroing
; and earned money for summary
clc
lda EarnedMoneyL,x
adc gainL,x
sta EarnedMoneyL,x
lda EarnedMoneyH,x
adc gainH,x
sta EarnedMoneyH,x
; substract lose
; if lose is greater than money then zero money
lda EarnedMoneyH,x
cmp loseH,x
bcc ezeromoney
bne esubstractlose
lda EarnedMoneyL,x
cmp loseL,x
bcc ezeromoney
esubstractlose
sec
lda EarnedMoneyL,x
sbc loseL,x
sta EarnedMoneyL,x
lda EarnedMoneyH,x
sbc loseH,x
sta EarnedMoneyH,x
jmp eskipzeroing
ezeromoney
lda #0
sta EarnedMoneyL,x
sta EarnedMoneyH,x
eskipzeroing
dex
jpl CalculateGainsLoop
rts
.endp
;--------------------------------------------------
.proc RoundInit
;--------------------------------------------------
; at the beginning of each Round we set energy
; of all players to 99
; the maximum shooting energy to 990 (it is 10*energy)
; the default shooting energy to 350
; the shooting angle is randomized
; of course gains an loses are zeroed
RmtSong song_ingame
jsr SetPMWidthAndColors ; A=0
lda #0
sta AfterBFGflag ; reset BFG flag
sta COLOR2 ; status line "off"
sta COLOR1
tax
@ sta singleRoundVars,x
inx
cpx #(singleRoundVarsEnd-singleRoundVars)
bne @-
ldx #(MaxPlayers-1)
SettingEnergies
lda #$00
sta gainL,x
sta gainH,x
sta loseL,x
sta loseH,x
lda #99
sta Energy,x
sta eXistenZ,x
sta LASTeXistenZ,x
; anything in eXistenZ table means that this tank exist
; in the given round
jsr MaxForceCalculate
lda #<350
sta ForceTableL,x
lda #>350
sta ForceTableH,x
;lda #(255-45)
;it does not look good when all tanks have
;barrels pointing the same direction
;so it would be nice to have more or less random
;angles
jsr RandomizeAngle
sta AngleTable,x
dex
bpl SettingEnergies
; set mountain type if ...
lda RandomMountains
beq noRandomMountains
@ ldy RANDOM
cpy #5
bcs @-
jsr SetVariablesFromOptions.setMountainsType
noRandomMountains
;generating the new landscape
jsr PMoutofScreen ;let P/M disappear
jsr clearscreen ;let the screen be clean
jsr ClearPMmemory
jsr placetanks ;let the tanks be evenly placed
jsr calculatemountains ;let mountains be easy for the eye
;jsr calculatemountains0 ;only for tests - makes mountains flat and 0 height
mwa #StatusBufferROM temp
mwa #StatusBufferCopy temp2
mwa #StatusBufferCopyEnd+1 modify
jsr CopyFromROM
jsr SetMainScreen
jsr drawmountains ;draw them
jsr drawtanks ;finally draw tanks
mva #$00 TankSequencePointer
lda random
sta MeteorsRound ; Turns meteors on or off during the next round.
;---------round screen is ready---------
mva #TextForegroundColor COLOR1 ; status line "on"
rts
.endp
;--------------------------------------------------
.proc MainRoundLoop
; here we must check if by a chance there is only one
; tank with energy greater than 0 left
;--------------------------------------------------
ldy #0 ; in Y - number of tanks with energy greater than zero
sty ATRACT ; reset atract mode
ldx NumberOfPlayers
dex
CheckingIfRoundIsFinished
lda eXistenZ,x
beq NoEnergy
iny
NoEnergy
dex
bpl CheckingIfRoundIsFinished
cpy #2 ; is it less than 2 tanks have energy >0 ?
bcs DoNotFinishTheRound
;points for the last living tank
ldx NumberOfPlayers
dex
WhichTankWonLoop
lda eXistenZ,x
bne ThisOneWon
dex
bpl WhichTankWonLoop
;error was here!!!
; somehow I believed program will be never here
; but it was a bad assumption
; god knows when there is such a situation
; (we've got a SITUATION here, if you know what I mean)
; there are two tanks left.
; one of them is killed by the second tank
; second tank explodes and kills the first one.
; and code lands here...
; looks like no one won!
rts
ThisOneWon
lda CurrentResult
clc
adc ResultsTable,x
sta ResultsTable,x
rts ; this Round is finished
DoNotFinishTheRound
; Seppuku here
lda noDeathCounter
cmp seppukuVal
bcc @+
mva #0 noDeathCounter
mva #sfx_seppuku sfx_effect
jsr DisplaySeppuku
jmp Seppuku
@
; Auto Defense - activates defensives
ldx NumberOfPlayers
dex
CheckNextTankAD
lda Energy,x ; only active players
beq @+
lda AutoDefenseFlag,x ; with Auto Defence activated
beq @+
; run auto defense for tank in X
jsr AutoDefense
@ dex
bpl CheckNextTankAD
jsr DrawTanks ; redraw tanks with new defences
;
ldx TankSequencePointer
lda TankSequence,x
sta TankNr
tax
lda Energy,x ;skip if no energy
jeq NextPlayerShoots
mva #$ff plot4x4color
jsr DisplayTankNameAbove
mva #1 color ;to display flying point
ldx tankNr
lda TankStatusColoursTable,x
sta COLOR2 ; set color of status line
jsr RandomizeForce.LimitForce
jsr PutTankNameOnScreen
; jsr DisplayStatus ; There is no need anymore, it is always after PutTankNameOnScreen
bit MeteorsRound
bmi @+
mva #0 MeteorsFlag
@
lda SkillTable,x
beq ManualShooting
RoboTanks
; robotanks shoot here
; TankNr still in X
jsr ArtificialIntelligence
;pause 30
ldx TankNr
jsr DisplayStatus ; to make visible AI selected defensive (and offensive :) )
jsr MoveBarrelToNewPosition
lda kbcode
cmp #@kbcode._esc ; 28 ; ESC
bne @+
jsr AreYouSure
@ bit escFlag
spl:rts ; keys Esc or O
jmp AfterManualShooting
ManualShooting
lda JoyNumber,x
jsr SetJoystickPort ; set joystick port for player
jsr WaitForKeyRelease
lda #%00000000
sta TestFlightFlag ; set "Test Fight" off
jsr BeforeFire
bit escFlag
spl:rts ; keys Esc or O
AfterManualShooting
ldy #$00
sty plot4x4color
dex
sty MeteorsFlag ; $ff
jsr DisplayTankNameAbove
; defensive weapons without flight handling
ldx TankNr
lda ActiveDefenceWeapon,x
cmp #ind_Hovercraft
beq GoFloat
cmp #ind_White_Flag ; White Flag
beq ShootWhiteFlag
cmp #ind_Nuclear_Winter_
bne StandardShoot
ShootAtomicWinter
; --- atomic winter ---
jsr AtomicWinter
jmp NextPlayerShoots ; and we skip shoot
ShootWhiteFlag
; --- white flag ---
jsr WhiteFlag
jsr TankFlying.SoilDownAfterLanding ; Soildown like after Hovercraf landing :)
jmp NextPlayerShoots ; and we skip shoot
GoFloat
jsr TankFlying
lda #0
sta ActiveDefenceWeapon,x ; deactivate after use
bit escFlag
bpl ManualShooting ; after floating tank can shoot
rts
StandardShoot
inc noDeathCounter
jsr DecreaseWeaponBeforeShoot
jsr DisplayStatus
; ldx TankNr
dec Energy,x ; lower energy to eventually let tanks commit suicide
ShootNow
lda ActiveWeapon,x
cmp #ind_Buy_me ; BFG
beq WeponNoFlight ; but with explosion
cmp #ind_Punch ; Punch
beq WeponNoFlight ; but with explosion
bit MeteorsRound
bmi @+
mva #0 MeteorsFlag
@
jsr Shoot ; bullet flight
mva #$ff MeteorsFlag
bit escFlag
spl:rts ; keys Esc or O
lda HitFlag ;0 if missed
beq missed
bne GoExplosion
WeponNoFlight
jsr NoShoot ; no bullet flight
GoExplosion
jsr Explosion
continueMainRoundLoopAfterSeppuku
mva #sfx_silencer sfx_effect
AfterExplode
jsr SoilDown ; allways
NoFallDown2
;here tanks are falling down
mva tankNr tempor2
ldx NumberOfPlayers
dex
TanksFallDown
stx TankNr
lda eXistenZ,x
beq NoExistNoFall
jsr TankFalls
NoExistNoFall
dex
bpl TanksFallDown
mvx tempor2 TankNr
missed
ldy WeaponDepleted
bne @+
ldx TankNr
tya
sta ActiveWeapon,x
@
;here we clear offensive text (after a shoot) - is cleared !! :)
; ldy TankNr
; jsr DisplayOffensiveTextNr
NextPlayerShoots
;before it shoots, the eXistenZ table must be updated
;accordingly to actual energy (was forgotten, sorry to ourselves)
ldx #(MaxPlayers-1)
SeteXistenZ
lda Energy,x
sta eXistenZ,x
jsr MaxForceCalculate
dex
bpl SeteXistenZ
;was setup of maximum energy for players
PlayersAgain
; In LASTeXistenZ there are values of eXistenZ before shoot
; from the next tank.
; Now it must be checked if by a chance something that had
; LASTeXistenZ>0 is not equal to 0 right now,
; because it means this tank died during this round.
; Most important thing is:
; after each explosion of the tank these operations must be
; performed from the beginning!
; (it is made by another jump into the after explosion routines)
; It is because exploding tank can destroy their neighbours,
; additionally this tank just have had LASTeXistenZ set to 0,
; otherwise it would explode again and again.
; OK, text how to do it is ready, now comes coding .
; Aaaah! - in the main loop we have to set eXistenZ and LASTeXistenZ
mva #sfx_next_player sfx_effect
ldx NumberOfPlayers
dex
CheckingPlayersDeath
lda LASTeXistenZ,x
beq NoPlayerNoDeath
lda eXistenZ,x
beq PlayerXdeath
NoPlayerNoDeath
dex
bpl CheckingPlayersDeath
; if processor is here it means there are no more explosions
inc:lda TankSequencePointer
cmp NumberOfPlayers
bne NotLastPlayerInRound
mva #0 TankSequencePointer
lda WindChangeInRound
beq NoWindChangeNow
jsr GetRandomWind ; wind change after each turn (not round only)
NoWindChangeNow
NotLastPlayerInRound
jmp MainRoundLoop
.endp
;---------------------------------
.proc PlayerXdeath
; this tank should not explode anymore:
; there is 0 in A, and Tank Number in X, so...
;---------------------------------
sta LASTeXistenZ,x
; save x somewhere
stx TankTempY
;clear NoDeathCounter here
sta noDeathCounter
mva #sfx_death_begin sfx_effect
; display defensive text here (well, defensive
; is not the real meaning, it should be pre-death,
; but I am too lazy to change names of variables)
; in X there is a number of tank that died
lda #78 ; mumber of defensive text after BFG! ("VERY FUNNY.")
bit AfterBFGflag ; check BFG flag
bmi TextAfterBFG
; if BFG then no points for dead tanks ...
lda CurrentResult
clc
adc ResultsTable,x
sta ResultsTable,x
;inc CurrentResult
; RandomizeDeffensiveText
randomize talk.NumberOfOffensiveTexts (talk.NumberOfDeffensiveTexts+talk.NumberOfOffensiveTexts-1)
TextAfterBFG
sta TextNumberOff
inc CurrentResult ; ... but increase result of winner (BFG)
ldy TankTempY
lda #$ff
jsr DisplayOffensiveTextNr.notZero
; tank flash
ldy TankTempY
mva TankNr temp2 ; not elegant, and probably unnecessary
sty TankNr
jsr FlashTank ; blinking and pausing (like PAUSE 72 - 18x(2+2) )
mva temp2 TankNr
;Deffensive text cleanup
;here we clear Deffensive text (after a shoot)
ldy TankTempY
jsr DisplayOffensiveTextNr
; calculate position of the explosion (the post-death one)
ldx TankTempY
clc
lda xtankstableL,x
adc #4 ; more or less in the middle of the tank
sta xdraw
lda xtankstableH,x
adc #0
sta xdraw+1
sec
lda ytankstable,x
sbc #4
sta ydraw
lda #0
sta ydraw+1 ; there is 0 left in A, so... TODO: bad code above. revisit
;cleanup of the soil fall down ranges (left and right)
jsr ClearScreenSoilRange
; We are randomizing the weapon now.
; jumping into the middle of the explosion
; routine
MetodOfDeath
lda random
and #%00011111 ; range 0-31
cmp #(weaponsOfDeathEnd-weaponsOfDeath) ; we have 20 weapons in table (from 0 to 19)
bcs MetodOfDeath
tay
lda weaponsOfDeath,y
jsr ExplosionDirect
mva #sfx_silencer sfx_effect
; Clear current Shooter settings. After that, Shooter will "search" for the target again
ldx NumberOfPlayers
dex
@ lda skillTable,x
cmp #2 ; clear variables only if Shooter
bne NotShooter
lda #0
sta PreviousAngle,x
sta PreviousEnergyL,x
sta PreviousEnergyH,x
NotShooter
dex
bpl @-
; jump to after explosion routines (soil fallout, etc.)
; After going through these routines we are back
; to checking if a tank exploded and maybe we have
; a deadly shot here again.
jmp MainRoundLoop.AfterExplode
.endp
;--------------------------------------------------
.proc DecreaseEnergyX
;Decreases energy of player nr X by the value Y
;increases his financial loss
;increases gain of tank TankNr
;--------------------------------------------------
sty EnergyDecrease
; Lose increase
lda loseL,x
clc
adc EnergyDecrease
sta loseL,x
scc
inc loseH,x
; Energy now, not less than 0
lda Energy,x
cmp EnergyDecrease
bcc ldahashzero
;sec
sbc EnergyDecrease
bpl NotNegativeEnergy
ldahashzero
lda #0
NotNegativeEnergy
sta Energy,x
;now increase the gain of the shooting tank
ldy TankNr
clc
lda gainL,y
adc EnergyDecrease
sta gainL,y
lda gainH,y
adc #0
sta gainH,y
rts
.endp
;--------------------------------------------------
.proc DecreaseShieldEnergyX
; Decreases energy of shield player nr X by the value Y
; if shield energy is 0 after decrease then in Y we have
; rest of the energy - to decrease tank energy
;--------------------------------------------------
sty EnergyDecrease
ldy #0 ; if Shield survive then no decrease tank anergy
; Energy cannot be less than 0
lda ShieldEnergy,x
cmp EnergyDecrease
bcc UseAllShieldEnergy
;sec
sbc EnergyDecrease
bpl NotNegativeShieldEnergy ; jump allways
UseAllShieldEnergy
; now calculate rest of energy for future tank energy decrease
sec
lda EnergyDecrease
sbc ShieldEnergy,x
tay
lda #0
NotNegativeShieldEnergy
sta ShieldEnergy,x
rts
.endp
;---------------------------------
.proc Seppuku
;---------------------------------
lda #0
sta ydraw+1
; get position of the tank
ldx TankNr
; lda #0 ; turn off defense weapons when hara-kiring
sta ActiveDefenceWeapon,x
sta ShieldEnergy,x
jsr SetupXYdraw
lda #1 ; Missile
jsr ExplosionDirect
jmp MainRoundLoop.continueMainRoundLoopAfterSeppuku
.endp
;--------------------------------------------------
.proc GetRandomWind
;in: MaxWind (byte)
;out: Wind (word)
;uses: _
;--------------------------------------------------
lda random
cmp MaxWind
bcs GetRandomWind ; if more than MaxWind then randomize again
sta Wind
mva #$00 Wind+1
sta Wind+2
sta Wind+3
; multiply Wind by 16
; two bytes of Wind are treated as a decimal part of vx variable
:4 aslw Wind
; decide the direction
lda random
and #$01
beq @+
sec ; Wind = -Wind
.rept 4
lda #$00
sbc Wind+#
sta Wind+#
.endr
@ rts
.endp
;--------------------------------------------------
.proc MaxForceCalculate
; calculates max force for tank (tanknr in X)
; Energy of tank X in A
;--------------------------------------------------
sta L1
;DATA L1,L2
;Multiplication 8bit*8bit,
;result 16bit
;this algiorithm is a little longer than one in Ruszczyc 6502 book
;but it is faster
ldy #8
lda #0
clc
LP0 ror
ror L1
bcc B0
clc
adc #10 ; (L2) multiplication by 10
B0 dey
bne LP0
ror
ror L1
sta MaxForceTableH,x
lda L1
sta MaxForceTableL,x
rts
.endp
;--------------------------------------------------
.proc WeaponCleanup
; cleaning of the weapon possesion tables
; 99 of Baby Missles and White Flags, all other weapons=0)
;--------------------------------------------------
ldx #(number_of_weapons - 1)
@ lda #$0
cpx #ind_White_Flag ; White Flag
bne no99
set99 lda #99
no99
.REPT MaxPlayers, #+1
sta TanksWeapon:1,x
.ENDR
dex
beq set99 ; Baby Missile (index=0)
bpl @-
rts
.endp
;--------------------------------------------------
.proc Initialize
;Initialization sequence
;uses: temp, ...
;--------------------------------------------------
deletePtr = temp
; clean variables
lda #0
sta escFlag
tay
mwa #variablesStart deletePtr
@ tya
sta (deletePtr),y
inw deletePtr
cpw deletePtr #ClearedvariablesEnd
bne @-
tya
jsr SetJoystickPort
; ser initial shapes for each tank (tanks 0-5 has shape 0 now)
ldy #1
sty TankShape+1
sty TankShape+4
iny
sty TankShape+2
sty TankShape+5
mwa #1024 RandBoundaryHigh
mva #$ff LastWeapon
sta HowMuchToFall
mva #1 color
jsr SetStandardBarrels
jsr WeaponCleanup
mva #>WeaponFont chbas
;parameter for old plot (unPlot) max 5 points
ldx #4
SetunPlots
lda #<display
sta oldplotL,x
lda #>display
sta oldplotH,x
lda #0
sta oldply,x
lda #$ff
sta oldora,x
dex
bpl SetunPlots
;setting up P/M graphics
lda #>pmgraph
sta pmbase
lda #$03 ; P/M on
sta GRACTL
jsr SetPMWidthAndColors
lda #%00100001 ; P/M priorities (multicolor players on) - prior=1
sta GPRIOR
jsr PMoutofScreen
;let the tanks be visible!
ldx #(maxPlayers-1)
lda #99 ; tank is visible
MakeTanksVisible
sta eXistenZ,x
dex
bpl MakeTanksVisible
mva #1 CurrentRoundNr ;we start from round 1
mva #6 NTSCcounter
rts
.endp
;--------------------------------------------------
.proc SetStandardBarrels
; set standart barrel length and deactivate Auto Defense
; for all tanks
;--------------------------------------------------
ldx #maxPlayers-1
@ lda #StandardBarrel ; standard barrel length
sta BarrelLength,x
lda #$00 ; deactivate Auto Defense
sta AutoDefenseFlag,x
dex
bpl @-
rts
.endp
;----------------------------------------------
/* .proc RandomizeSequence0
ldx #0
@ txa
sta TankSequence,x
inx
cpx #MaxPlayers
bne @-
rts
.endp */
;--------------------------------------------------
.proc RandomizeSequence
; in: NumberOfPlayers
; out: TankSequence
; how: get random number lower than NumberOfPlayers
; put it in the first slot.
; get another random number lower than NumberOfPlayers
; check if was previously saved in first slot
; if not then save it in second slot
; repeat untill NumberOfPlayers
ldx #0
GetRandomAgain0
lda RANDOM
and #$07 ;NumberOfPlayers < 7
cmp NumberOfPlayers
bcs GetRandomAgain0
sta TankSequence,x
;now first slot is ready, nexts slots are handled
;in a more complicated way
GetRandomAgainX
lda RANDOM
and #$07 ;NumberOfPlayers < 7
cmp NumberOfPlayers
bcs GetRandomAgainX
;now we have to check if the value was not used
;in previous slots
stx temp
ldy temp
UsageLoop
cmp TankSequence,y
beq GetRandomAgainX ;apparently we have already used this value
dey
bpl UsageLoop
;well, looks like this value is new!
inx
sta TankSequence,x
stx temp
inc:lda temp ;x+1
cmp NumberOfPlayers
bne GetRandomAgainX
rts
.endp
;----------------------------------------------
.proc RandomizeAngle
; routine returns in A
; a valid angle for the tank's barrel.
; X is not changed
;----------------------------------------------
; lets randomize someting between 0 and 180
lda RANDOM
cmp #180
bcs RandomizeAngle
rts
.endp
;----------------------------------------------
.proc RandomizeForce
; routine returns in ForceTable/L/H
; valid force of shooting for TankNr
; in X must be TankNr
; low and high randomize boundary passed as word value
; RandBoundaryLow
; RandBoundaryHigh
;----------------------------------------------
lda RANDOM
sta temp2
lda RANDOM
and #%00000011 ;(0..1023)
sta temp2+1
cpw RandBoundaryLow temp2
seq:bcs RandomizeForce
cpw RandBoundaryHigh temp2
bcc RandomizeForce
lda temp2
sta ForceTableL,x
lda temp2+1
sta ForceTableH,x
;---------
LimitForce
; in X must be TankNr
; cuts force to MaxForceTable
lda MaxForceTableH,x
cmp ForceTableH,x
bne @+
lda MaxForceTableL,x
cmp ForceTableL,x
@ bcs @+
lda MaxForceTableL,x
sta ForceTableL,x
lda MaxForceTableH,x
sta ForceTableH,x
@
rts
.endp
;----------------------------------------------
.proc Table2Force
;----------------------------------------------
lda ForceTableL,x
sta Force
lda ForceTableH,x
sta Force+1
rts
.endp
;----------------------------------------------
.proc MoveBarrelToNewPosition
;----------------------------------------------
mva #1 Erase
jsr DrawTankNr.BarrelChange
mva #0 Erase
MoveBarrel
mva #sfx_set_power_2 sfx_effect
jsr DrawTankNr
jsr DisplayStatus.displayAngle
;
jsr CheckExitKeys
spl:rts ;---Exit key pressed-quit game---
ldx TankNr
;
mva #1 Erase
bit TestFlightFlag
bmi AIaim
jsr WaitOneFrame
AIaim
jsr DrawTankNr.BarrelChange
mva #0 Erase
lda NewAngle
cmp AngleTable,x
beq BarrelPositionIsFine
bcc rotateLeft
rotateRight ; older is lower
inc angleTable,x
jmp MoveBarrel
rotateLeft ; older is bigger
dec angleTable,x
jmp MoveBarrel
BarrelPositionIsFine
jmp DrawTankNr
; rts
.endp
;----------------------------------------------
.proc SortSequence ;
;----------------------------------------------
; here we try to get a sequence of tanks for two
; purposes:
; 1. to make up shooting sequence for the next round (from down to top)
; 2. to display game results more nicely (from top to down)
;
; I think I will go for a stupid bubble sort...
; it is easy to test :)
;
; Results are in ResultsTable, in TankSequence (Sorted Table) we want to
; have numbers of tanks from the worst to the best.
; in other words, if ResultsTable=(5,4,65,23,3,6)
; the TankSequence=(4,1,0,5,3,2)
; let's assume initially the TankSequence=(0,1,2,3,4,5)
ldx #0
SequenceStart
txa
sta TankSequence,x
inx
cpx #MaxPlayers
bne SequenceStart
; i=0:sortflag=0
;loop:
; if TR(i) < TX(i+1) then i=i+1: here quit if i=numberofplayers
; or goto loop:
; else
; temp=TR(i): tempo=TankSequence(i)
; TR(i)=TR(i+1): TankSequence(i)=TankSequence(i+1)
; TR(i+1)=temp: TankSequence(i+1)=tempo
; i=i+1
; sortflag=sortflag+1
; go loop:
; if sortflag=0 then finished, else repeat...
;
; or something like this :)
Bubble
ldx #0 ;i=x
stx temp2 ; sortflag=temp2
inx ; because NumberOfPlayers start from 1 (not 0)
BubbleBobble
ldy TankSequence-1,x ; x count from 1 to NumberOfPlayers (we need cout from 0 to NumberOfPlayers-1)
lda ResultsTable,y
ldy TankSequence,x
cmp ResultsTable,y
bcc nextishigher
bne swapvalues
nextisequal
; if results are equal, check Direct Hits
ldy TankSequence-1,x
lda DirectHits,y
ldy TankSequence,x
cmp DirectHits,y
bcc nextishigher
bne swapvalues
nextisequal2
; if results are equal, check money (H)
ldy TankSequence-1,x
lda EarnedMoneyH,y
ldy TankSequence,x
cmp EarnedMoneyH,y
bcc nextishigher
bne swapvalues
nextisequal2b
; if results are equal, check money (L)
ldy TankSequence-1,x
lda EarnedMoneyL,y
ldy TankSequence,x
cmp EarnedMoneyL,y
;
beq nextishigher ; this is to block hangs when 2 equal values meet
bcc nextishigher
;here we must swap values
;because next is smaller than previous
swapvalues
lda TankSequence-1,x
sta temp
lda TankSequence,x
sta TankSequence-1,x
lda temp
sta TankSequence,x
inc temp2
nextishigher
inx
cpx NumberOfPlayers
bne BubbleBobble
lda temp2
bne Bubble
rts
.endp
;--------------------------------------------------
.proc SetWallsType
;--------------------------------------------------
mva #0 WallsType
lda OptionsTable+8
cmp #4
beq SetRandomWalls
lsr
ror WallsType
lsr
ror WallsType
rts
SetRandomWalls
lda random
and #%11000000
sta WallsType
rts
.endp
; --------------------------------------
; Sets the appropriate variables based on the options table
;
.proc SetVariablesFromOptions
;first option
ldy OptionsTable
iny
iny
sty NumberOfPlayers ;1=1 player (but minimum is 2)
;second option (cash)
ldy OptionsTable+1
ldx #0
@
lda CashOptionL,y
sta moneyL,x
lda CashOptionH,y
sta moneyH,x
inx
cpx NumberOfPlayers
bne @-
;third option (gravity)
ldy OptionsTable+2
lda GravityTable,y
sta gravity
;fourth option (wind)
ldy OptionsTable+3
lda MaxWindTable,y
sta MaxWind
;fifth option (no of rounds)
ldy OptionsTable+4
lda RoundsTable,y
sta RoundsInTheGame
;6th option (shell speed)
ldy OptionsTable+5
lda flyDelayTable,y
sta flyDelay
;7th option (Airstrike after how many missess)
ldy OptionsTable+6
lda seppukuTable,y
sta seppukuVal
;8th option (how aggressive are mountains)
ldy OptionsTable+7
setMountainsType
lda mountainsDeltaTableH,y
sta mountainDeltaH
lda mountainsDeltaTableL,y
sta mountainDeltaL
rts
.endp
;--------------------------------
.proc DisplayResults ;
;displays results of the round
;using 4x4 font
jsr RoundOverSprites
mva #$ff plot4x4color
;centering the result screen
mva #((ScreenHeight/2)-(8*4)) ResultY
;upper frame
mva ResultY LineYdraw
jsr TL4x4_top
adb ResultY #4 ;next line
;Header1
;Displays round number
lda CurrentRoundNr
cmp RoundsInTheGame
beq GameOver4x4
;sta decimal
mwx #RoundNrDisplay displayposition
jsr displaybyte ;decimal (byte), displayposition (word)
mwa #LineHeader1 LineAddress4x4
mwa #((ScreenWidth/2)-(8*4)) LineXdraw
mva ResultY LineYdraw
jsr TypeLine4x4
beq @+ ;unconditional jump, because TypeLine4x4 ends with beq
GameOver4x4
RmtSong song_round_over
mwa #LineGameOver LineAddress4x4
mwa #((ScreenWidth/2)-(8*4)) LineXdraw
mva ResultY LineYdraw
jsr TypeLine4x4
mva #1 GameIsOver
@
adb ResultY #4 ;next line
;Empty line
mva ResultY LineYdraw
jsr TL4x4_empty
adb ResultY #2 ;next line
;Header2
mwa #LineHeader2 LineAddress4x4
mwa #((ScreenWidth/2)-(8*4)) LineXdraw
mva ResultY LineYdraw
jsr TypeLine4x4
adb ResultY #4 ;next line
;Empty line
mva ResultY LineYdraw
jsr TL4x4_empty
sbb ResultY #2 ;next line (was empty)
ldx NumberOfPlayers ;we start from the highest (best) tank
dex ;and it is the last one
stx ResultOfTankNr ;in TankSequence table
mwa #TanksNames tempXROLLER
ResultOfTheNextPlayer
ldx ResultOfTankNr ;we are after a round, so we can use TankNr
lda TankSequence,x ;and we keep here real number if the tank
sta TankNr ;for which we are displaying results
adb ResultY #4 ;next line
;there are at least 2 players, so we can safely
;start displaying the result
lda #3 ;it means |
sta ResultLineBuffer
ldy TankNr
lda ResultsTable,y
sta decimal
mva #0 decimal+1
mwa #(ResultLineBuffer+8) displayposition
jsr displaydec5 ;decimal (byte), displayposition (word)
; overwrite the second digit of the points (max 255)
;it means ":"
mva #26 ResultLineBuffer+9
ldx #0
lda TankNr
asl
asl ; times 8, because it is lengtgh
asl ; of the names of the tanks
tay
TankNameCopyLoop
lda (tempXROLLER),y ;XROLLER is not working now
and #$3f ;always CAPITAL letters
inx
sta ResultLineBuffer,x
iny
cpx #8 ; end of name
bne TankNameCopyLoop
; last letter of tank name overwrites first digit of the points (max 255)
;just after the digits
;it means |
mva #$3 ResultLineBuffer+13
;result line display
mwa #ResultLineBuffer LineAddress4x4
mwa #((ScreenWidth/2)-(8*4)) LineXdraw
mva ResultY LineYdraw
jsr TypeLine4x4
adb ResultY #4 ;next line
;Empty line
mva ResultY LineYdraw
jsr TL4x4_empty
dec ResultOfTankNr
bmi FinishResultDisplay
sbb ResultY #2 ;distance between lines is smaller
jmp ResultOfTheNextPlayer
FinishResultDisplay
mva ResultY LineYdraw
;jmp TL4x4_bottom ; just go
.endp
.proc TL4x4_bottom
;bottom of the frame
mwa #LineBottom LineAddress4x4
mwa #((ScreenWidth/2)-(8*4)) LineXdraw
jmp TypeLine4x4 ; jsr:rts
.endp
.proc TL4x4_top
;bottom of the frame
mwa #LineTop LineAddress4x4
mwa #((ScreenWidth/2)-(8*4)) LineXdraw
jmp TypeLine4x4 ; jsr:rts
.endp
.proc TL4x4_empty
;empty frame
mwa #LineEmpty LineAddress4x4
mwa #((ScreenWidth/2)-(8*4)) LineXdraw
jmp TypeLine4x4 ; jsr:rts
.endp
.ENDIF
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