Effects of branch (and union) space [Commit 2] (#28)

constants/collision_constants.asm

@@ -124,6 +124,7 @@ DEF COLL_UP_LEFT_BUOY      EQU $c7 ; unused
     const COLL_END_SPACE      ; $d6
     const COLL_GREY_SPACE     ; $d7
     const COLL_BRANCH_SPACE   ; $d8
+    const COLL_UNION_SPACE    ; $d9
 DEF NUM_COLL_SPACES EQU const_value - $d0
 DEF COLL_FF                EQU $ff ; garbage
 

data/collision/collision_permissions.asm

@@ -217,8 +217,8 @@ TileCollisionTable::
 	db LAND_TILE         ; COLL_MINIGAME_SPACE
 	db LAND_TILE         ; COLL_END_SPACE
 	db LAND_TILE         ; COLL_GREY_SPACE
-	db LAND_TILE         ; d8
+	db LAND_TILE         ; COLL_BRANCH_SPACE
-	db LAND_TILE         ; d9
+	db LAND_TILE         ; COLL_UNION_SPACE
 	db LAND_TILE         ; da
 	db LAND_TILE         ; db
 	db LAND_TILE         ; dc

data/sprites/secondary_sprites.asm

@@ -116,7 +116,7 @@ SpacesLeftNumberOAM:
 
 BranchArrowsOAM:
 ; the PAL_ argument is unused (actual palette comes from the player gender)
-	dbsprite 10,  7, 4, 0, BRANCH_ARROWS_OAM_FIRST_TILE,     PAL_OW_RED ; right
+	dbsprite 11, 10, 4, 0, BRANCH_ARROWS_OAM_FIRST_TILE,     PAL_OW_RED ; right
-	dbsprite  8,  7, 4, 0, BRANCH_ARROWS_OAM_FIRST_TILE + 1, PAL_OW_RED ; left
+	dbsprite  7, 10, 4, 0, BRANCH_ARROWS_OAM_FIRST_TILE + 1, PAL_OW_RED ; left
-	dbsprite  9,  6, 4, 0, BRANCH_ARROWS_OAM_FIRST_TILE + 2, PAL_OW_RED ; up
+	dbsprite  9,  8, 4, 0, BRANCH_ARROWS_OAM_FIRST_TILE + 2, PAL_OW_RED ; up
-	dbsprite  9,  8, 4, 0, BRANCH_ARROWS_OAM_FIRST_TILE + 3, PAL_OW_RED ; down
+	dbsprite  9, 12, 4, 0, BRANCH_ARROWS_OAM_FIRST_TILE + 3, PAL_OW_RED ; down

data/tilesets/board_debug_1_collision.asm

@@ -67,7 +67,7 @@
 	tilecoll WALL, WALL, FLOOR, WALL ; 42
 	tilecoll WATER, WATER, WATER, WATER ; 43
 	tilecoll WALL, FLOOR, WALL, FLOOR ; 44
-	tilecoll WALL, FLOOR, FLOOR, FLOOR ; 45
+	tilecoll FLOOR, FLOOR, FLOOR, FLOOR ; 45
 	tilecoll FLOOR, WALL, FLOOR, WALL ; 46
 	tilecoll FLOOR, FLOOR, FLOOR, WALL ; 47
 	tilecoll WALL, FLOOR, WALL, WALL ; 48
@@ -124,8 +124,8 @@
 	tilecoll WALL, WALL, WALL, WALL ; 7b
 	tilecoll WALL, WALL, WALL, WALL ; 7c
 	tilecoll WALL, WALL, WALL, WALL ; 7d
-	tilecoll WALL, WALL, WALL, WALL ; 7e
+	tilecoll BRANCH_SPACE, FLOOR, FLOOR, FLOOR ; 7e
-	tilecoll WALL, WALL, WALL, WALL ; 7f
+	tilecoll UNION_SPACE, FLOOR, FLOOR, FLOOR ; 7f
 	tilecoll BLUE_SPACE, FLOOR, FLOOR, FLOOR ; 80
 	tilecoll BLUE_SPACE, FLOOR, FLOOR, FLOOR ; 81
 	tilecoll BLUE_SPACE, FLOOR, FLOOR, FLOOR ; 82

engine/board/spaces.asm

@@ -127,6 +127,8 @@ LandedInRegularSpace:
 
 BranchSpaceScript::
 	scall .ArriveToBranchSpaceScript
+	callasm .PromptPlayerToChooseDirection
+	wait 200
 	end
 
 .ArriveToBranchSpaceScript:
@@ -152,3 +154,63 @@ BranchSpaceScript::
 
 .DisableDirectionsRequiringLockedTechniques:
 	ret
+
+.PromptPlayerToChooseDirection:
+; compute available directions in b as joypad dpad flags
+	ld hl, wTempSpaceBranchStruct
+	ld b, 0
+	ld a, [hli]
+	cp -1
+	jr z, .not_right
+	set D_RIGHT_F, b
+.not_right
+	ld a, [hli]
+	cp -1
+	jr z, .not_left
+	set D_LEFT_F, b
+.not_left
+	ld a, [hli]
+	cp -1
+	jr z, .not_up
+	set D_UP_F, b
+.not_up
+	ld a, [hli]
+	cp -1
+	jr z, .joypad_loop
+	set D_DOWN_F, b
+
+; sample input of an available direction
+.joypad_loop
+	call GetJoypad
+	ldh a, [hJoyPressed]
+	and b
+	jr z, .joypad_loop
+
+; load the next space for the chosen direction
+	ld hl, wTempSpaceBranchStruct
+	bit D_RIGHT_F, a
+	jr nz, .ok
+	inc hl
+	bit D_LEFT_F, a
+	jr nz, .ok
+	inc hl
+	bit D_UP_F, a
+	jr nz, .ok
+	inc hl
+.ok
+	ld a, [hl]
+	ld [wCurSpaceNextSpace], a
+	ld hl, wDisplaySecondarySprites
+	res SECONDARYSPRITES_BRANCH_ARROWS_F, [hl]
+	jp PlayClickSFX
+
+UnionSpaceScript::
+	callasm .ArriveToUnionSpace
+	end
+
+.ArriveToUnionSpace:
+; these are just transition spaces, so simply load the next space
+	ld a, [wCurSpaceNextSpace]
+	ld [wCurSpace], a
+	call LoadCurSpaceData
+	end

engine/overworld/events.asm

@@ -385,6 +385,7 @@ CheckBoardEvent:
 	dw EndSpaceScript      ; COLL_END_SPACE
 	dw GreySpaceScript     ; COLL_GREY_SPACE
 	dw BranchSpaceScript   ; COLL_BRANCH_SPACE
+	dw UnionSpaceScript    ; COLL_UNION_SPACE
 	assert_table_length NUM_COLL_SPACES
 
 CheckTrainerEvent:

gfx/tilesets/board_debug_1_palette_map.asm

@@ -26,7 +26,7 @@
 	tilepal 1, RED, RED, YELLOW, YELLOW, GRAY, GRAY, GRAY, GRAY
 	tilepal 1, WATER, WATER, RED, RED, GREEN, GREEN, BROWN, BROWN
 	tilepal 1, RED, RED, YELLOW, YELLOW, GRAY, GRAY, GRAY, GRAY
+	tilepal 1, RED, RED, RED, RED, BROWN, BROWN, BROWN, BROWN
 	tilepal 1, BROWN, BROWN, BROWN, BROWN, BROWN, BROWN, BROWN, BROWN
-	tilepal 1, BROWN, BROWN, BROWN, BROWN, BROWN, BROWN, BROWN, BROWN
+	tilepal 1, RED, RED, RED, RED, BROWN, BROWN, BROWN, BROWN
-	tilepal 1, BROWN, BROWN, BROWN, BROWN, BROWN, BROWN, BROWN, BROWN
 	tilepal 1, BROWN, BROWN, BROWN, BROWN, BROWN, BROWN, BROWN, BROWN

gfx/tilesets/spaces/variable_spaces_1_palette_map.asm

@@ -1,4 +1,4 @@
-	tilepal 1, YELLOW, YELLOW, GREEN, GREEN, BROWN, BROWN, GRAY, GRAY
+	tilepal 1, RED, RED, RED, RED, BROWN, BROWN, GRAY, GRAY
 	tilepal 1, GRAY, GRAY, GRAY, GRAY, GRAY, GRAY, GRAY, GRAY
-	tilepal 1, YELLOW, YELLOW, GREEN, GREEN, BROWN, BROWN, GRAY, GRAY
+	tilepal 1, RED, RED, RED, RED, BROWN, BROWN, GRAY, GRAY
 	tilepal 1, GRAY, GRAY, GRAY, GRAY, GRAY, GRAY, GRAY, GRAY

macros/scripts/maps.asm

@@ -134,9 +134,17 @@ ENDM
 MACRO space
 ;\1: x coord
 ;\2: y coord
+; [non-branch space]
 ;\3: effect (space type specific)
 ;\4: next space
-	db \1, \2, \3, \4
+; [branch space]
+;\3: pointer to branch struct
+	db \1, \2
+if _NARG == 4
+	db \3, \4
+else
+	dw \3
+endc
 ENDM
 
 MACRO trainer

maps/DebugLevel5_Map1.asm

@@ -19,12 +19,14 @@ DebugLevel5_Map1_MapEvents:
 DebugLevel5_Map1_MapSpaces:
 	space  2,  4,  $0,  1 ;  0
 	space  4,  4,  $0,  2 ;  1
-	space  6,  4,  $0,  3 ;  2
+	space  6,  4,  .BranchDataSpace2 ;  2
+
 	space  8,  4,  $0,  4 ;  3
 	space 10,  4,  $0,  5 ;  4
 	space 12,  4,  $0,  6 ;  5
 	space 14,  4,  $0,  7 ;  6
 	space 16,  4,  $0,  8 ;  7
+
 	space 18,  4,  $0,  9 ;  8
 	space 20,  4,  $0, 10 ;  9
 	space 22,  4,  $0, 11 ; 10
@@ -52,3 +54,17 @@ DebugLevel5_Map1_MapSpaces:
 	space 10,  8,  $0, 33 ; 32
 	space 12,  8,  $0, 34 ; 33
 	space 14,  8,  $0, 34 ; 34
+
+	space  6,  2,  $0, 36 ; 35
+	space  6,  0,  $0, 37 ; 36
+	space  8,  0,  $0, 38 ; 37
+	space 10,  0,  $0, 39 ; 38
+	space 12,  0,  $0, 40 ; 39
+	space 14,  0,  $0, 41 ; 40
+	space 16,  0,  $0, 42 ; 41
+	space 16,  2,  $0, 43 ; 42
+	space 16,  4,  $0,  8 ; 43
+
+.BranchDataSpace2:
+	db  3, -1, 35, -1
+	db  0,  0,  0,  0

maps/DebugLevel5_Map1.blk

@@ -1 +1 @@
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