mirror of https://github.com/pret/pokecrystal.git
128 lines
1.7 KiB
NASM
128 lines
1.7 KiB
NASM
Fish:
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; Using a fishing rod.
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; Fish for monsters with rod e in encounter group d.
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; Return monster d at level e.
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push af
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push bc
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push hl
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ld b, e
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call GetFishGroupIndex
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ld hl, FishGroups
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rept FISHGROUP_DATA_LENGTH
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add hl, de
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endr
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call .Fish
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pop hl
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pop bc
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pop af
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ret
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.Fish:
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; Fish for monsters with rod b from encounter data in FishGroup at hl.
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; Return monster d at level e.
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call Random
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cp [hl]
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jr nc, .no_bite
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; Get encounter data by rod:
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; 0: Old
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; 1: Good
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; 2: Super
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inc hl
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ld e, b
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ld d, 0
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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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; Compare the encounter chance to select a Pokemon.
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call Random
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.loop
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cp [hl]
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jr z, .ok
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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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inc hl
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; Species 0 reads from a time-based encounter table.
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ld a, [hli]
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ld d, a
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and a
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call z, .TimeEncounter
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ld e, [hl]
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ret
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.no_bite
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ld de, 0
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ret
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.TimeEncounter:
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; The level byte is repurposed as the index for the new table.
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ld e, [hl]
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ld d, 0
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ld hl, TimeFishGroups
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rept 4
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add hl, de
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endr
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ld a, [wTimeOfDay]
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maskbits NUM_DAYTIMES
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cp NITE_F
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jr c, .time_species
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inc hl
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inc hl
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.time_species
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ld d, [hl]
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inc hl
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ret
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GetFishGroupIndex:
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; Return the index of fishgroup d in de.
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push hl
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ld hl, wDailyFlags1
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bit DAILYFLAGS1_FISH_SWARM_F, [hl]
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pop hl
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jr z, .done
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ld a, d
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cp FISHGROUP_QWILFISH
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jr z, .qwilfish
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cp FISHGROUP_REMORAID
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jr z, .remoraid
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.done
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dec d
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ld e, d
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ld d, 0
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ret
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.qwilfish
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ld a, [wFishingSwarmFlag]
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cp FISHSWARM_QWILFISH
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jr nz, .done
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ld d, FISHGROUP_QWILFISH_SWARM
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jr .done
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.remoraid
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ld a, [wFishingSwarmFlag]
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cp FISHSWARM_REMORAID
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jr nz, .done
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ld d, FISHGROUP_REMORAID_SWARM
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jr .done
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INCLUDE "data/wild/fish.asm"
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