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https://gitlab.com/xCrystal/pokecrystal-board.git
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276 lines
3.2 KiB
NASM
276 lines
3.2 KiB
NASM
TreeMonEncounter:
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farcall StubbedTrainerRankings_TreeEncounters
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xor a
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ld [wTempWildMonSpecies], a
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ld [wCurPartyLevel], a
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ld hl, TreeMonMaps
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call GetTreeMonSet
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jr nc, .no_battle
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call GetTreeMons
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jr nc, .no_battle
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call GetTreeMon
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jr nc, .no_battle
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ld a, BATTLETYPE_TREE
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ld [wBattleType], a
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ld a, 1
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ld [wScriptVar], a
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ret
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.no_battle
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xor a
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ld [wScriptVar], a
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ret
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RockMonEncounter:
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xor a
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ld [wTempWildMonSpecies], a
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ld [wCurPartyLevel], a
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ld hl, RockMonMaps
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call GetTreeMonSet
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jr nc, .no_battle
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call GetTreeMons
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jr nc, .no_battle
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; 40% chance of an encounter
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ld a, 10
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call RandomRange
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cp 4
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jr nc, .no_battle
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call SelectTreeMon
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jr nc, .no_battle
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ret
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.no_battle
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xor a
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ret
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db $05 ; ????
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GetTreeMonSet:
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; Return carry and treemon set in a
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; if the current map is in table hl.
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ld a, [wMapNumber]
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ld e, a
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ld a, [wMapGroup]
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ld d, a
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.loop
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ld a, [hli]
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cp -1
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jr z, .not_in_table
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cp d
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jr nz, .skip2
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ld a, [hli]
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cp e
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jr nz, .skip1
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jr .in_table
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.skip2
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inc hl
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.skip1
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inc hl
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jr .loop
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.not_in_table
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xor a
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ret
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.in_table
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ld a, [hl]
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scf
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ret
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INCLUDE "data/wild/treemon_maps.asm"
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GetTreeMons:
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; Return the address of TreeMon table a in hl.
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; Return nc if table a doesn't exist.
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cp NUM_TREEMON_SETS
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jr nc, .quit
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and a
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jr z, .quit
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ld e, a
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ld d, 0
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ld hl, TreeMons
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add hl, de
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add hl, de
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ld a, [hli]
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ld h, [hl]
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ld l, a
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scf
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ret
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.quit
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xor a
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ret
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INCLUDE "data/wild/treemons.asm"
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GetTreeMon:
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push hl
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call GetTreeScore
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pop hl
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and a ; TREEMON_SCORE_BAD
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jr z, .bad
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cp TREEMON_SCORE_GOOD
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jr z, .good
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cp TREEMON_SCORE_RARE
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jr z, .rare
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ret
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.bad
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; 10% chance of an encounter
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ld a, 10
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call RandomRange
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and a
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jr nz, NoTreeMon
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jr SelectTreeMon
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.good
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; 50% chance of an encounter
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ld a, 10
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call RandomRange
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cp 5
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jr nc, NoTreeMon
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jr SelectTreeMon
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.rare
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; 80% chance of an encounter
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ld a, 10
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call RandomRange
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cp 8
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jr nc, NoTreeMon
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jr .skip
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.skip
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ld a, [hli]
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cp -1
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jr nz, .skip
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call SelectTreeMon
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ret
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SelectTreeMon:
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; Read a TreeMons table and pick one monster at random.
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ld a, 100
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call RandomRange
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.loop
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sub [hl]
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jr c, .ok
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inc hl
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inc hl
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inc hl
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jr .loop
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.ok
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ld a, [hli]
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cp -1
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jr z, NoTreeMon
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ld a, [hli]
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ld [wTempWildMonSpecies], a
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ld a, [hl]
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ld [wCurPartyLevel], a
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scf
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ret
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NoTreeMon:
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xor a
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ld [wTempWildMonSpecies], a
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ld [wCurPartyLevel], a
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ret
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GetTreeScore:
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call .CoordScore
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ld [wTreeMonCoordScore], a
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call .OTIDScore
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ld [wTreeMonOTIDScore], a
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ld c, a
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ld a, [wTreeMonCoordScore]
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sub c
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jr z, .rare
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jr nc, .ok
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add 10
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.ok
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cp 5
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jr c, .good
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; bad
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xor a ; TREEMON_SCORE_BAD
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ret
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.good
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ld a, TREEMON_SCORE_GOOD
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ret
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.rare
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ld a, TREEMON_SCORE_RARE
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ret
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.CoordScore:
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call GetFacingTileCoord
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ld hl, 0
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ld c, e
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ld b, 0
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ld a, d
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and a
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jr z, .next
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.loop
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add hl, bc
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dec a
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jr nz, .loop
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.next
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add hl, bc
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ld c, d
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add hl, bc
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ld a, h
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ldh [hDividend], a
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ld a, l
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ldh [hDividend + 1], a
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ld a, 5
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ldh [hDivisor], a
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ld b, 2
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call Divide
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ldh a, [hQuotient + 2]
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ldh [hDividend], a
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ldh a, [hQuotient + 3]
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ldh [hDividend + 1], a
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ld a, 10
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ldh [hDivisor], a
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ld b, 2
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call Divide
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ldh a, [hRemainder]
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ret
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.OTIDScore:
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ld a, [wPlayerID]
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ldh [hDividend], a
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ld a, [wPlayerID + 1]
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ldh [hDividend + 1], a
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ld a, 10
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ldh [hDivisor], a
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ld b, 2
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call Divide
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ldh a, [hRemainder]
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ret
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