mirror of
https://github.com/thornAvery/kep-hack.git
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1893b4c7cf
Rhyperior files are dummies and will need to be properly edited with sprites, Rhydon evo data, etc, but it (and the other files included) show that the trainer and pokemon sprite indexes have been separated, which allows us to add the other KEP mons
106 lines
2.7 KiB
NASM
106 lines
2.7 KiB
NASM
; try to initiate a wild pokemon encounter
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; returns success in Z
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TryDoWildEncounter:
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ld a, [wNPCMovementScriptPointerTableNum]
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and a
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ret nz
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ld a, [wd736]
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and a
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ret nz
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callfar IsPlayerStandingOnDoorTileOrWarpTile
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jr nc, .notStandingOnDoorOrWarpTile
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.CantEncounter
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ld a, $1
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and a
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ret
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.notStandingOnDoorOrWarpTile
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callfar IsPlayerJustOutsideMap
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jr z, .CantEncounter
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ld a, [wRepelRemainingSteps]
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and a
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jr z, .next
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dec a
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jr z, .lastRepelStep
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ld [wRepelRemainingSteps], a
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.next
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; determine if wild pokemon can appear in the half-block we're standing in
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; is the bottom right tile (9,9) of the half-block we're standing in a grass/water tile?
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hlcoord 9, 9
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ld c, [hl]
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ld a, [wGrassTile]
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cp c
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ld a, [wGrassRate]
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jr z, .CanEncounter
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ld a, $14 ; in all tilesets with a water tile, this is its id
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cp c
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ld a, [wWaterRate]
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jr z, .CanEncounter
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; even if not in grass/water, standing anywhere we can encounter pokemon
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; so long as the map is "indoor" and has wild pokemon defined.
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; ...as long as it's not Viridian Forest or Safari Zone.
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ld a, [wCurMap]
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cp FIRST_INDOOR_MAP ; is this an indoor map?
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jr c, .CantEncounter2
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ld a, [wCurMapTileset]
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cp FOREST ; Viridian Forest/Safari Zone
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jr z, .CantEncounter2
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ld a, [wGrassRate]
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.CanEncounter
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; compare encounter chance with a random number to determine if there will be an encounter
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ld b, a
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ldh a, [hRandomAdd]
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cp b
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jr nc, .CantEncounter2
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ldh a, [hRandomSub]
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ld b, a
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ld hl, WildMonEncounterSlotChances
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.determineEncounterSlot
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ld a, [hli]
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cp b
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jr nc, .gotEncounterSlot
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inc hl
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jr .determineEncounterSlot
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.gotEncounterSlot
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; determine which wild pokemon (grass or water) can appear in the half-block we're standing in
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ld c, [hl]
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ld hl, wGrassMons
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lda_coord 8, 9
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cp $14 ; is the bottom left tile (8,9) of the half-block we're standing in a water tile?
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jr nz, .gotWildEncounterType ; else, it's treated as a grass tile by default
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ld hl, wWaterMons
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; since the bottom right tile of a "left shore" half-block is $14 but the bottom left tile is not,
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; "left shore" half-blocks (such as the one in the east coast of Cinnabar) load grass encounters.
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.gotWildEncounterType
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ld b, 0
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add hl, bc
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ld a, [hli]
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ld [wCurEnemyLVL], a
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ld a, [hl]
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ld [wcf91], a
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ld [wEnemyMonSpecies2], a
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ld a, [wRepelRemainingSteps]
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and a
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jr z, .willEncounter
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ld a, [wPartyMon1Level]
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ld b, a
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ld a, [wCurEnemyLVL]
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cp b
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jr c, .CantEncounter2 ; repel prevents encounters if the leading party mon's level is higher than the wild mon
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jr .willEncounter
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.lastRepelStep
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ld [wRepelRemainingSteps], a
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ld a, TEXT_REPEL_WORE_OFF
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ldh [hSpriteIndexOrTextID], a
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call EnableAutoTextBoxDrawing
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call DisplayTextID
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.CantEncounter2
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ld a, $1
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and a
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ret
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.willEncounter
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xor a
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ld [wIsTrainerBattle], a
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ret
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INCLUDE "data/wild/probabilities.asm"
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