From 0ddae2eac07d890bad3bfe79fa9e59cb9d214040 Mon Sep 17 00:00:00 2001
From: Pokeglitch <pokeglitchx@gmail.com>
Date: Sat, 16 Jun 2018 15:44:10 -0400
Subject: More field moves, need to clean up names and constants

---
 engine/events/overworld.asm | 299 +++++++++++++++++++++++++++++++++++++++++++-
 engine/pokemon/health.asm   | 222 +++++++++++++++++++++++++++++++-
 2 files changed, 515 insertions(+), 6 deletions(-)

(limited to 'engine')

diff --git a/engine/events/overworld.asm b/engine/events/overworld.asm
index d3d099d..6b5bbc7 100755
--- a/engine/events/overworld.asm
+++ b/engine/events/overworld.asm
@@ -1,6 +1,297 @@
 INCLUDE "constants.asm"
 
-SECTION "FlyFunction", ROMX[$51af], BANK[$03]
+SECTION "CutFunction", ROMX[$4fab], BANK[$03]
+
+CutFunction: ; 03:4fab
+	call .reset
+.loop
+	call .next
+	jr nc, .loop
+	ld [wFieldMoveSucceeded], a
+	ret
+.reset
+	xor a
+	ld [wFieldMoveScriptID], a
+	ret
+.next
+	ld a, [wFieldMoveScriptID]
+	ld hl, CutTable
+	jp CallJumptable
+	
+CutTable
+	dw TryCut
+	dw CheckMapForSomethingToCut
+	dw CheckMapForSomethingToCut2
+	dw DoCut
+	dw DoCut
+	dw FailCut
+
+TryCut: ; 03:4fd1
+	call GetMapEnvironment
+	cp ROUTE
+	jr z, .success
+	cp TOWN
+	jr z, .success
+	ld a, SCRIPT_ID_05
+	ld [wFieldMoveScriptID], a
+	xor a
+	ret
+.success
+	ld a, SCRIPT_ID_01
+	ld [wFieldMoveScriptID], a
+	xor a
+	ret
+
+CheckMapForSomethingToCut: ; 03:4fea
+	call GetFacingTileCoord
+	cp $80 ; TODO - Constant
+	jr nz, .fail
+	call GetBlockLocation
+	ld a, l
+	ld [wMapBlocksAddress], a
+	ld a, h
+	ld [wMapBlocksAddress + 1], a
+	ld a, [hl]
+	call GetCutReplacementBlock
+	jr nc, .fail
+	dec hl
+	ld a, [hl]
+	ld [wReplacementBlock], a
+	ld a, SCRIPT_ID_04
+	ld [wFieldMoveScriptID], a
+	xor a
+	ret
+.fail
+	ld a, SCRIPT_ID_02
+	ld [wFieldMoveScriptID], a
+	xor a
+	ret
+
+GetCutReplacementBlock:
+	ld c, a
+	ld hl, CutReplacementBlocks
+.loop
+	ld a, [hli]
+	cp -1
+	ret z
+	inc hl
+	cp c
+	jr nz, .loop
+	scf
+	ret
+	
+CutReplacementBlocks:
+; replacement block, facing block
+	db $30, $25
+	db $31, $2A
+	db $32, $34
+	db $33, $35
+	db -1
+
+; TODO - Better name
+CheckMapForSomethingToCut2: ; 03:502c
+	call GetFacingTileCoord
+	call CheckCuttableTile
+	jr nc, .fail
+	call GetBlockLocation
+	ld a, [hl]
+	cp $3b	; TODO - constant?
+	jr nz, .fail
+	ld a, l
+	ld [wMapBlocksAddress], a
+	ld a, h
+	ld [wMapBlocksAddress + 1], a
+	ld a, $04
+	ld [wReplacementBlock], a
+	ld a, SCRIPT_ID_03
+	ld [wFieldMoveScriptID], a
+	xor a
+	ret
+.fail
+	ld a, SCRIPT_ID_05
+	ld [wFieldMoveScriptID], a
+	xor a
+	ret
+	
+CheckCuttableTile:
+	ld hl, CuttableTiles
+	ld c, a
+.loop
+	ld a, [hli]
+	cp -1
+	ret z
+	cp c
+	jr nz, .loop
+	scf
+	ret
+	
+CuttableTiles:
+	db $81
+	db $82
+	db $8A
+	db $8B
+	db -1
+
+FailCut: ; 03:5069
+	ld hl, Text_CantUseCutHere
+	call MenuTextBoxBackup
+	scf
+	ld a, SCRIPT_FAIL
+	ret
+	
+Text_CantUseCutHere: ; 03:5073
+	text "ここでは　つかえません"
+	prompt
+
+DoCut: ; 03:5080
+	ld hl, CutScript
+	ld a, BANK(CutScript)
+	call QueueScript
+	scf
+	ld a, SCRIPT_SUCCESS
+	ret
+
+CutScript: ; 03:508C
+	call RefreshScreen
+	ld hl, wPartyMonNicknames
+	ld a, 2 ; TODO - constant
+	ld [wMonType], a
+	ld a, [wWhichPokemon]
+	call GetNick
+	call CopyStringToStringBuffer2
+	ld hl, Text_CutItDown
+	call MenuTextBoxBackup
+	ld de, $62 ; TODO - constant
+	call PlaySFX
+	ld hl, wMapBlocksAddress
+	ld a, [hli]
+	ld h, [hl]
+	ld l, a
+	ld a, [wReplacementBlock]
+	ld [hl], a
+	call LoadMapPart
+	call UpdateSprites
+	call WaitBGMap
+	call Function1fea
+	scf
+	ret
+	
+Text_CutItDown: ; 03:50c4
+	text_from_ram wStringBuffer2
+	text "　は　"
+	line "くさかりを　つかった！"
+	prompt	
+
+SurfFunction: ; 03:50d8
+	call .reset
+.loop
+	call .next
+	jr nc, .loop
+	ld [wFieldMoveSucceeded], a
+	ret
+.reset
+	xor a
+	ld [wFieldMoveScriptID], a
+	ret
+.next
+	ld a, [wFieldMoveScriptID]
+	ld hl, SurfTable
+	jp CallJumptable
+
+SurfTable:
+	dw TrySurf
+	dw DoSurf
+	dw FailSurf
+
+TrySurf: ; 03:50f8
+	call GetFacingTileCoord
+	and $f0 ; todo - mask constant
+	cp $20 ; todo -constant
+	jr z, .success
+	cp $40 ; todo - constant
+	jr z, .success
+	ld a, SCRIPT_ID_02
+	ld [wFieldMoveScriptID], a
+	xor a
+	ret
+.success
+	ld a, SCRIPT_ID_01
+	ld [wFieldMoveScriptID], a
+	xor a
+	ret
+
+DoSurf: ; 03:5113
+	ldh a, [hROMBank]
+	ld hl, SurfScript
+	call QueueScript
+	ld a, SCRIPT_FINISHED
+	ld [wFieldMoveScriptID], a
+	scf
+	ld a, SCRIPT_SUCCESS
+	ret
+
+FailSurf: ; 03:5124
+	ld hl, Text_CantSurfHere
+	call MenuTextBoxBackup
+	ld a, SCRIPT_FINISHED
+	ld [wFieldMoveScriptID], a
+	scf
+	ld a, SCRIPT_FAIL
+	ret
+
+Text_CantSurfHere: ; 03:5133
+	text "ここでは　のることが"
+	next "できません"
+	prompt
+	
+SurfScript: ; 03:5145
+	call RefreshScreen
+	ld hl, wPartyMonNicknames
+	ld a, 2 ; TODO - constant
+	ld [wMonType], a
+	ld a, [wWhichPokemon]
+	call GetNick
+	call CopyStringToStringBuffer2
+	ld hl, Text_UsedSurf
+	call MenuTextBoxBackup
+	ld a, $04 ; TODO - constant
+	ld [wPlayerBikeSurfState], a
+	call Function0d02
+	call PlayMapMusic
+	call Function_d185
+	call Function1fea
+	ret
+
+Text_UsedSurf: ; 03:5171
+	text_from_ram wStringBuffer2
+	text "　は　"
+	line "@"
+	text_from_ram wPlayerName
+	text "を　のせた！"
+	prompt
+	
+Function_d185: ; 03:5185
+	call InitMovementBuffer
+	call .sub_d19b
+	call AppendToMovementBuffer
+	ld a, $32 ; TODO - constant
+	call AppendToMovementBuffer
+	ld a, 0 ; TODO - constant
+	ld hl, wMovementBuffer
+	call LoadMovementDataPointer
+.sub_d19b
+	ld a, [wPlayerWalking]
+	srl a
+	srl a
+	ld e, a
+	ld d, $00
+	ld hl, Table_Unknown_d1ab
+	add hl, de
+	ld a, [hl]
+	ret
+
+Table_Unknown_d1ab:
+	db 4, 5, 6, 7
 
 ; Sets wFieldMoveSucceeded to $f if successful, $0 if not
 FlyFunction: ; 03:51af
@@ -129,13 +420,13 @@ DigTable: ; 03:527D
 CheckCanDig: ; 03:5283
 	call GetMapEnvironment
 	cp INDOOR
-	jr z, .fail
+	jr z, .success
 	cp CAVE
-	jr z, .fail
+	jr z, .success
 	ld a, SCRIPT_ID_02
 	ld [wFieldMoveScriptID], a
 	ret
-.fail
+.success
 	ld a, SCRIPT_ID_01
 	ld [wFieldMoveScriptID], a
 	ret
diff --git a/engine/pokemon/health.asm b/engine/pokemon/health.asm
index 59ec4db..96616ae 100755
--- a/engine/pokemon/health.asm
+++ b/engine/pokemon/health.asm
@@ -95,7 +95,7 @@ HealParty: ; 03:4d6f
 	jr nz, .pp_up
 	ret
 	
-SECTION "ComputeHPBarPixels", ROMX[$4e3c], BANK[$03]
+SECTION "HP Bar", ROMX[$4e3c], BANK[$03]
 	
 ComputeHPBarPixels: ; 03:4e3c
 	push hl
@@ -138,4 +138,222 @@ ComputeHPBarPixels: ; 03:4e3c
 	and a
 	ret nz
 	ld e, 1
-	ret
\ No newline at end of file
+	ret
+		
+UpdateHPBar: ; 03:4e7c
+	ld a, [wHPBarOldHP]
+	ld c, a
+	ld a, [wHPBarOldHP + 1]
+	ld b, a
+	ld a, [wHPBarNewHP]
+	ld e, a
+	ld a, [wHPBarNewHP + 1]
+	ld d, a
+	push de
+	push bc
+	call UpdateHPBar_CalcHPDifference
+	ld a, e
+	ld [wHPBarHPDifference + 1], a
+	ld a, d
+	ld [wHPBarHPDifference], a
+	pop bc
+	pop de
+	call UpdateHPBar_CompareNewHPToOldHP
+	ret z
+	ld a, -1
+	jr c, .hp_decrease
+	ld a, 1
+.hp_decrease
+	ld [wHPBarDelta], a
+	ld a, [wHPBarNewHP]
+	ld e, a
+	ld a, [wHPBarNewHP + 1]
+	ld d, a
+.animate_hp_bar_loop
+	push de
+	ld a, [wHPBarOldHP]
+	ld c, a
+	ld a, [wHPBarOldHP + 1]
+	ld b, a
+	call UpdateHPBar_CompareNewHPToOldHP
+	jr z, .animate_hp_bar_done
+	jr nc, .hp_increase
+	
+;hp_decrease
+	dec bc
+	ld a, c
+	ld [wHPBarNewHP], a
+	ld a, b
+	ld [wHPBarNewHP + 1], a
+	call UpdateHPBar_CalcOldNewHPBarPixels
+	ld a, e
+	sub d
+	jr .apply
+.hp_increase
+	inc bc
+	ld a, c
+	ld [wHPBarNewHP], a
+	ld a, b
+	ld [wHPBarNewHP + 1], a
+	call UpdateHPBar_CalcOldNewHPBarPixels
+	ld a, d
+	sub e
+.apply
+	call UpdateHPBar_PrintHPNumber
+	and a
+	jr z, .no_pixel_difference
+	call UpdateHPBar_AnimateHPBar
+.no_pixel_difference
+	ld a, [wHPBarNewHP]
+	ld [wHPBarOldHP], a
+	ld a, [wHPBarNewHP + 1]
+	ld [wHPBarOldHP + 1], a
+	pop de
+	jr .animate_hp_bar_loop
+.animate_hp_bar_done
+	pop de
+	ld a, e
+	ld [wHPBarOldHP], a
+	ld a, d
+	ld [wHPBarOldHP + 1], a
+	or e
+	jr z, .mon_fainted
+	call UpdateHPBar_CalcOldNewHPBarPixels
+	ld d, e
+.mon_fainted
+	call UpdateHPBar_PrintHPNumber
+	ld a, 1 ; TODO - Constant
+	call UpdateHPBar_AnimateHPBar
+	jp WaitBGMap
+	
+; animates the HP bar going up or down for (a) ticks (two waiting frames each)
+; stops prematurely if bar is filled up
+; e: current health (in pixels) to start with
+UpdateHPBar_AnimateHPBar: ; 03:4F11
+	push hl
+
+.bar_animation_loop
+	push af
+	push de
+	ld d, 6	; TODO - constant
+	ld a, [wHPBarType]
+	and $01 ; TODO - what mask is this?
+	ld b, a
+	call DrawBattleHPBar
+	ld c, 2
+	call DelayFrames
+	pop de
+	ld a, [wHPBarDelta]
+	add e
+	cp $31	; TODO - constant
+	jr nc, .bar_filled_up
+	ld e, a
+	pop af
+	dec a
+	jr nz, .bar_animation_loop
+	pop hl
+	ret
+.bar_filled_up
+	pop af
+	pop hl
+	ret
+	
+; compares old HP and new HP and sets c and z flags accordingly
+UpdateHPBar_CompareNewHPToOldHP: ; 03:4F37
+	ld a, d
+	sub b
+	ret nz
+	ld a, e
+	sub c
+	ret
+	
+; calcs HP difference between bc and de (into de)
+UpdateHPBar_CalcHPDifference: ; 03:4F3D
+	ld a, d
+	sub b
+	jr c, .old_hp_greater
+	jr z, .test_lower_byte
+.new_hp_greater
+	ld a, e
+	sub c
+	ld e, a
+	ld a, d
+	sbc b
+	ld d, a
+	ret
+.old_hp_greater
+	ld a, c
+	sub e
+	ld e, a
+	ld a, b
+	sbc d
+	ld d, a
+	ret
+.test_lower_byte
+	ld a, e
+	sub c
+	jr c, .old_hp_greater
+	jr nz, .new_hp_greater
+	ld de, 0
+	ret
+	
+UpdateHPBar_PrintHPNumber: ; 03:4F5B
+	push af
+	push de
+	ld a, [wHPBarType]
+	and a
+	jr z, .done
+	ld a, [wHPBarOldHP]
+	ld [wHPBarTempHP + 1], a
+	ld a, [wHPBarOldHP + 1]
+	ld [wHPBarTempHP], a
+	push hl
+	ld de, $15	; TODO - Constant
+	add hl, de
+	push hl
+	ld a, "　"
+	ld [hli], a
+	ld [hli], a
+	ld [hli], a
+	pop hl
+	ld de, wHPBarTempHP
+	lb bc, 2, 3
+	call PrintNumber
+	call DelayFrame
+	pop hl
+.done
+	pop de
+	pop af
+	ret
+
+; calcs number of HP bar pixels for old and new HP value
+; d: new pixels
+; e: old pixels
+UpdateHPBar_CalcOldNewHPBarPixels: ; 03:4F8B
+	push hl
+	ld hl, wHPBarMaxHP
+	ld a, [hli]
+	ld e, a
+	ld a, [hli]
+	ld d, a
+	ld a, [hli]
+	ld c, a
+	ld a, [hli]
+	ld b, a
+	ld a, [hli]
+	ld h, [hl]
+	ld l, a
+	push hl
+	push de
+	call ComputeHPBarPixels
+	ld a, e
+	pop de
+	pop bc
+	push af
+	call ComputeHPBarPixels
+	pop af
+	ld d, e
+	ld e, a
+	pop hl
+	ret
+
-- 
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