NightMusic
Member
* This method uses only choosing between two characters on the screen. It is fairly basic and has much room for improvement. *
1. open extraScreenLoad (where your screen flags are located)
If you followed my tutorial for an overworld map you'll notice a gamestate check (around line 72 or so)
Copy that part of the code until +afterCheck (line 137 or so)
Code :
create a variable .....
User Variable : charSelect
0 - main
1 - alternative character
------------------------------------------
Selection Inputs :
startGame.asm
THIS IS THE CURRENT START GAME SCRIPT :
SINCE WE ARENT HAVING ANY OTHER OPTIONS , WE DONT NEED TO CHANGE MUCH...
We can still have this AND do a character select screen OR We would edit this part of the script
WE ARE WARPING TO THE CHARACTER SELECT SCREEN THEN increasing a VARIABLE TO SELECT THE CHARACTER.
1. normal whatever start screen
(If you want ot edit this right now , you can but your char select would be on the title screen)
2. warps/start to your charSelect screen
3. that screen will have two character portraits or sprites side by side...
a. you select the sprite with the similar to start screen but it moves left and right.
b. this is only one screen so we don't need to add a variable for cursor location/we can just put it in manually
c. the variable charSelect can be used to move the cursor but you would have to write a lot more code.
d. because we are doing two selections not 3 or 4 different characters we will just use the gamestate
We will use Gamestate 4
View: https://youtu.be/w7jaTx-aCsc
THIS IS MY CURRENT SCRIPT AFTER EDITING IT:
YOU CAN TEST THIS AND SEE IT MANUALLY PLACED THE TILE AND IT MOVES RIGHT THEN RESETS BACK
it's using curSelect currently so its max number is also the max that is set to.
NEXT :
under the line ( endCheckingSelection: )
LDA gameState
CMP #4 ;; Is this Character Select Screen? ;;
BNE +notSelect
LDA charSelect
BNE +
INC charSelect
JMP +notSelect
+
DEC charSelect
+notSelect
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;[/CODE]
Though...
STILL KEEP THE LINES :
at the end of the script.
I added in POST SCREEN LOAD SOME GAME STATE CHECKS
SO NOW check your post screenload script...
mine looks like this :
1. open extraScreenLoad (where your screen flags are located)
If you followed my tutorial for an overworld map you'll notice a gamestate check (around line 72 or so)
Copy that part of the code until +afterCheck (line 137 or so)
Code :
Code:
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
LDA gameState
CMP #3 ;; #3 or #$03 Is this OverWorld Map ;;
BEQ canSwitchPlayer ;; this is what happens when you're on the overworld ;;
JMP doneSwitchingPlayer ;; this is normal script stuff ;;
canSwitchPlayer:
TXA
PHA
LDX player1_object
LDA Object_x_hi,x ;; the current horizontal position
; CLC
; ADC #$04
STA tempA
LDA Object_y_hi,x ;; the current vertical position
; CLC
; ADC #$04
STA tempB
LDA Object_direction,x ;; the current facing and movements
; AND #%00000111
STA tempC
;; now, depending of the current object used by the player:
;; we can switch to the new object, or switch back the normal one
DestroyObject ;; we destroy the current object
;;; OBJECT NUMBER ;;; #$0F For object 15
;;; \/ ;;;
CreateObject tempA, tempB, #$0F, #$00 ;; and create the new one
TXA
STA player1_object ;; store that new created object in the Player 1 var
STA camObject
LDA tempC ;; set back the player directions
STA Object_direction,x
PLA
TAX
JMP +afterCheck
doneSwitchingPlayer:
TXA
PHA
LDX player1_object
LDA Object_x_hi,x ;; the current horizontal position
; CLC
; ADC #$04
STA tempA
LDA Object_y_hi,x ;; the current vertical position
; CLC
; ADC #$04
STA tempB
LDA Object_direction,x ;; the current facing and movements
; AND #%00000111
STA tempC
DestroyObject ;; we destroy the current object
CreateObject tempA, tempB, #$00, #$00 ;; and create the new one
TXA
STA player1_object ;; store that new created object in the Player 1 var
STA camObject
LDA tempC ;; set back the player directions
STA Object_direction,x
PLA
TAX
+afterCheck
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;create a variable .....
User Variable : charSelect
0 - main
1 - alternative character
------------------------------------------
Selection Inputs :
startGame.asm
THIS IS THE CURRENT START GAME SCRIPT :
Code:
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; SELECTION MODE :
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; curSelection is 0 (normal) or curSelection is 1 (hard):
LDA curSelection
CMP #$01
BNE +
;; Start in HARD mode:
LDA #$01
STA myLives
JMP ++
+
;; ELSE:
;; Start in NORMAL mode :
;LDA #$03 ;; commented out, here, in order to use the value specified in the NESMaker tool itself
;STA myLives ;; commented out, here, in order to use the value specified in the NESMaker tool itself
++
LDA screenUpdateByte
ORA #%00000100
STA screenUpdateByte
LDA warpToMap
STA warpMap
LDA warpToScreen
STA currentNametable
LDX player1_object
STA Object_screen,x
LDA #$01
STA screenTransitionType ;; is of warp type
LDA gameHandler
ORA #%10000000
STA gameHandler ;; this will set the next game loop to update the screen.
RTS
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;SINCE WE ARENT HAVING ANY OTHER OPTIONS , WE DONT NEED TO CHANGE MUCH...
We can still have this AND do a character select screen OR We would edit this part of the script
WE ARE WARPING TO THE CHARACTER SELECT SCREEN THEN increasing a VARIABLE TO SELECT THE CHARACTER.
1. normal whatever start screen
(If you want ot edit this right now , you can but your char select would be on the title screen)
2. warps/start to your charSelect screen
3. that screen will have two character portraits or sprites side by side...
a. you select the sprite with the similar to start screen but it moves left and right.
b. this is only one screen so we don't need to add a variable for cursor location/we can just put it in manually
c. the variable charSelect can be used to move the cursor but you would have to write a lot more code.
d. because we are doing two selections not 3 or 4 different characters we will just use the gamestate
We will use Gamestate 4
Code:
LDA gameState
CMP #4 ;; #4 or #$04 Is this CharSelect screen? ;;THIS IS MY CURRENT SCRIPT AFTER EDITING IT:
Code:
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
LDA gameState
CMP #$01 ;; GAME STATE FOR START SCREEN ;;
BNE +checkCharScreen ;; check if on character select screen ;;
JMP +doSelector
+checkCharScreen
LDA gameState
CMP #4 ;; #4 or #$04 Is this Character Select? ;;
BEQ +isCharSelectScreen
JMP +notStartOrSelect
+isCharSelectScreen
LDA #100
STA temp1
LDA #60
STA temp2
LDX #$00
startScreenSelectorLoop2:
CPX curSelection
BCS +drawSprite
LDA temp1
CLC
ADC #0
STA temp1
LDA temp2
CLC
ADC #120
STA temp2
INX
JMP startScreenSelectorLoop2
+drawSprite:
DrawSprite temp2, temp1, #STARTSCREEN_CURSOR_TILE, #%00000000, #$00 ;; replace #STARTSCREEN_CURSOR_TILE with #you want for your tile ;;
JMP +notStartOrSelect ;; it needs to jump over the other position at least ;;
+doSelector:
LDA #SELECTION_POS_Y
STA temp1
LDA #SELECTION_POS_X
STA temp2
LDX #$00
startScreenSelectorLoop:
CPX curSelection
BCS +drawSprite
LDA temp1
CLC
ADC #SELECTION_STEP_Y
STA temp1
LDA temp2
CLC
ADC #SELECTION_STEP_X
STA temp2
INX
JMP startScreenSelectorLoop
+drawSprite:
DrawSprite temp2, temp1, #STARTSCREEN_CURSOR_TILE, #%00000000, #$00
+endCheckingStartScreenSelector:
+notStartOrSelect
;;; END OF SCRIPT UNLESS YOU ADD MORE PREDRAWS ;;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;YOU CAN TEST THIS AND SEE IT MANUALLY PLACED THE TILE AND IT MOVES RIGHT THEN RESETS BACK
it's using curSelect currently so its max number is also the max that is set to.
NEXT :
under the line ( endCheckingSelection: )
LDA gameState
CMP #4 ;; Is this Character Select Screen? ;;
BNE +notSelect
LDA charSelect
BNE +
INC charSelect
JMP +notSelect
+
DEC charSelect
+notSelect
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;[/CODE]
Though...
STILL KEEP THE LINES :
Code:
LDX tempx
RTSat the end of the script.
I added in POST SCREEN LOAD SOME GAME STATE CHECKS
SO NOW check your post screenload script...
mine looks like this :
Code:
LDA gameState
CMP #$01
BNE +
JMP ++
+
LoadObjectSubPalettes charSelect, #$00
;; arg0 = index of palette in bank 16
;; arg1 = starting point of sub palette, 0,4,8,12
;; Max Helsing ~ #$00
;; Anne Helsing ~ #$01
++
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
LDA #$00
STA curSelection
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
LDA gameState
BEQ +isMainGameCheck
JMP +isOther
+isMainGameCheck
LDA charSelect
CMP #1 ;; #4 or #$04 Is this Character Select? ;;
BEQ +isAnne
JMP +isMax
+isAnne
TXA
PHA
LDX player1_object
LDA Object_x_hi,x ;; the current horizontal position
; CLC
; ADC #$04
STA tempA
LDA Object_y_hi,x ;; the current vertical position
; CLC
; ADC #$04
STA tempB
LDA Object_direction,x ;; the current facing and movements
; AND #%00000111
STA tempC
;; now, depending of the current object used by the player:
;; we can switch to the new object, or switch back the normal one
DestroyObject ;; we destroy the current object
;;; OBJECT NUMBER ;;; #$0F For object 15
;;; \/ ;;;
CreateObject tempA, tempB, #$01, #$00 ;; and create the new one
TXA
STA player1_object ;; store that new created object in the Player 1 var
STA camObject
LDA tempC ;; set back the player directions
STA Object_direction,x
PLA
TAX
+isMax
+isOther
;;;;;;;;;;;;;;;
Last edited: