cucco storm

cuccostorm.asm

@@ -1,74 +1,75 @@
 ;================================================================================
-StartCuccoStorm:
-	;STA $FFFFFF
-	PHA : PHX : PHY : PHP
-		SEP #$30 ; set 8-bit accumulator & index registers
-		LDA $1B : BNE .done ; skip if indoors
+!CUCCO_STORM = "$7F50C5"
+!IS_INDOORS = "$7E001B"
+!ENEMY_STATE_TABLE = "$7E0DD0"
+!ENEMY_TYPE_TABLE = "$7E0E20"
+!ENEMY_AUX1_TABLE = "$7E0DA0"
+!ENEMY_AUX2_TABLE = "$7E0DB0"
+!ENEMY_DIRECTION_TABLE = "$7E0EB0"
+!CUCCO = "#$0B"
+!INERT = "#$00"
+!INIT = "#$08"
+!ALIVE = "#$09"
+!CUCCO_ENRAGED = "#$23"
+!LINK_POS_Y_LOW = "$20"
+!LINK_POS_Y_HIGH = "$21"
+!LINK_POS_X_LOW = "$22"
+!LINK_POS_X_HIGH = "$23"
+!ENEMY_POS_Y_LOW = "$7E0D00"
+!ENEMY_POS_X_LOW = "$7E0D10"
+!ENEMY_POS_Y_HIGH = "$7E0D20"
+!ENEMY_POS_X_HIGH = "$7E0D30"
+CuccoStorm:
 	
-			LDY.b #$0A
-			LDA.b #$0B : JSL Sprite_SpawnDynamically_arbitrary : BMI .done ; spawn a chicken
-			JSL Sprite_SetSpawnedCoords
-			LDA.b #$24 : STA $0DA0, Y ; turn it into an attack chicken
-			LDA.b #$01 : STA $0DB0, Y
-		
-	.done
-	PLP : PLY : PLX : PLA
-RTL
-;================================================================================
-SpawnAngryCucco:
-    TXA : EOR $1A : AND.b #$0F : ORA $1B : BNE .spawn_delay
-    
-    LDA.b #$0B
-    LDY.b #$0A
-    
-    JSL Sprite_SpawnDynamically_arbitrary : BMI .spawn_failed
-    
-    PHX
-    
-    TYX
-    
-    LDA.b #$1E : JSL Sound_SetSfx3PanLong
-    
-    PLX
-    
-    LDA.b #$01 : STA $0DB0, Y
-    
-    PHX
-    
-    JSL GetRandomInt : STA $0F : AND.b #$02 : BEQ .vertical_entry_point
-    
-    LDA $0F : ADC $E2    : STA $0D10, Y
-    LDA $E3 : ADC.b #$00 : STA $0D30, Y
-    
-    LDA $0F : AND.b #$01 : TAX
-    
-    LDA $9F3C, X : ADC $E8    : STA $0D00, Y
-    LDA $E9      : ADC.b #$00 : STA $0D20, Y
-    
-    BRA .set_velocity
-
-.vertical_entry_point
-
-    LDA $0F : ADC $E8    : STA $0D00, Y
-    LDA $E9 : ADC.b #$00 : STA $0D20, Y
-    
-    LDA $0F : AND.b #$01 : TAX
-    
-    LDA $9F3C, X : ADC $E2    : STA $0D10, Y
-    LDA $E3      : ADC.b #$00 : STA $0D30, Y
-
-.set_velocity
-
-    TYX
-    
-    LDA.b #$20 : JSL Sprite_ApplySpeedTowardsPlayerLong
-    
-    PLX
-
-    LDA.b #$30 : JSL Sound_SetSfx2PanLong
-
-.spawn_failed
-.spawn_delay
+	SEP #$30 ; set 8-bit accumulator index registers
+	LDA.l !CUCCO_STORM : BEQ + ; only if storm is on
+	LDA.b $10 : CMP.b #$09 : BNE + ; only if outdoors
+	LDA.l !LOOP_FRAMES_LOW : AND.b #$7F : BNE + ; check every 128 frames
 	
+	-
+		;==== Find a Cucco
+		
+		LDY.b #$FF : PHY ; push "cucco not found"
+	
+		LDX.b #$00 : -- : CPX.b #$10 : !BGE .ldone
+			LDA.w !ENEMY_STATE_TABLE, X : CMP.b !ALIVE : BEQ +++
+				; enemy not found
+				CMP.b !INERT : BNE ++
+					; log inert enemy slot
+					PLA : PHX
+					BRA ++
+			+++
+			; found an enemy
+			LDA.l !ENEMY_TYPE_TABLE, X : CMP.b !CUCCO : BNE ++
+				; it's a cucco
+				TXY ; record where we found the living cucco in case we don't find any angry ones
+				LDA.w !ENEMY_AUX1_TABLE, X : CMP.b !CUCCO_ENRAGED : !BLT ++
+					PLA : BRA + ; we found an angry cucco, done
+		++ : INX : BRA -- : .ldone
+		
+		;==== Create a Cucco
+	
+		CPY.b #$FF : BNE ++
+			; we didn't find a cucco, so try to create one
+			PLY
+			CPY.b #$FF : BEQ + ; fail if no slots found
+			LDA.b !CUCCO : STA.w !ENEMY_TYPE_TABLE, Y
+			LDA.b !INIT : STA.w !ENEMY_STATE_TABLE, Y
+			LDA.b !LINK_POS_Y_LOW : STA.w !ENEMY_POS_Y_LOW, Y
+			LDA.b !LINK_POS_Y_HIGH : STA.w !ENEMY_POS_Y_HIGH, Y
+			LDA.b !LINK_POS_X_LOW : STA.w !ENEMY_POS_X_LOW, Y
+			LDA.b !LINK_POS_X_HIGH : STA.w !ENEMY_POS_X_HIGH, Y
+			BRA +++
+		++
+			PLA
+		+++
+		
+		;==== Enrage a Cucco
+		
+		LDA.b !CUCCO_ENRAGED : STA.w !ENEMY_AUX1_TABLE, Y ; enrage the cucco
+		LDA.b #$00 : STA.w !ENEMY_AUX2_TABLE, Y : STA.w !ENEMY_DIRECTION_TABLE, Y
+		
+		;====
+	+
 RTL
 ;================================================================================

events.asm

@@ -17,6 +17,7 @@ OnDrawHud:
 	JSL.l DrawChallengeTimer ; this has to come before NewDrawHud because the timer overwrites the compass counter
 	JSL.l NewDrawHud
 	JSL.l SwapSpriteIfNecissary
+	JSL.l CuccoStorm
 	JSL.l PollService
 JML.l ReturnFromOnDrawHud
 ;--------------------------------------------------------------------------------