diff options
Diffstat (limited to 'engine/events/hidden_objects/vermilion_gym_trash2.asm')
| -rw-r--r-- | engine/events/hidden_objects/vermilion_gym_trash2.asm | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/engine/events/hidden_objects/vermilion_gym_trash2.asm b/engine/events/hidden_objects/vermilion_gym_trash2.asm new file mode 100644 index 00000000..1bc0590b --- /dev/null +++ b/engine/events/hidden_objects/vermilion_gym_trash2.asm @@ -0,0 +1,108 @@ +TrashCanRandom: + ld d, 0 + ld hl, .Jumptable + add hl, de + add hl, de + ld a, [hli] + ld h, [hl] + ld l, a + call JumpToAddress + ld e, a + ld d, 0 + ret + +.Jumptable: + dw .zero + dw .one + dw .two + dw .three + dw .four + +.zero +.one + ld a, 0 + ret + +.two + call Random + and $1 + ret + +.three ; should return to a, instead returns to b + call Random + swap a + cp 1 * $ff / 3 + ld b, 0 + ret c + cp 2 * $ff / 3 + ld b, 1 + ret c + ld b, 2 + ret + +.four + call Random + and $3 + ret + +Yellow_SampleSecondTrashCan: + ld hl, GymTrashCans3c + ld a, [wGymTrashCanIndex] + ld c, a + ld b, 0 + ld a, 9 + call AddNTimes + call AddNTimes ; ???? + ld a, [hli] + ldh [hGymTrashCanRandNumMask], a + ld e, a + push hl + call TrashCanRandom + pop hl + add hl, de + add hl, de + ld a, [hli] + ld [wSecondLockTrashCanIndex], a + ld a, [hl] + ld [wSecondLockTrashCanIndex + 1], a + ret + +GymTrashCans3c: +; First byte: number of trashcan entries +; Following four byte pairs: indices for the second trash can. +; BUG: Rows that have 3 trashcan entries are sampled incorrectly. +; The sampling occurs by taking a random number and seeing which +; third of the range 0-255 the number falls in. However, it returns +; that value to the wrong register, so the result is never used. +; Instead of using an offset in [0,1,2], the offset is instead +; in the full range 0-255. This results in truly random behavior. + db 4 + db 1,3, 3,1, 1,-1, 3,-1 + db 3 + db 0,2, 2,4, 4,0, -1,-1 + db 4 + db 1,5, 5,1, 1,-1, 5,-1 + db 3 + db 0,4, 4,6, 6,0, -1,-1 + db 4 + db 1,3, 3,1, 5,5, 7,7 + db 3 + db 2,4, 4,8, 8,2, -1,-1 + db 3 + db 3,7, 7,9, 9,3, -1,-1 + db 4 + db 4,8, 6,10, 8,4, 10,6 + db 3 + db 5,7, 7,11, 11,5, -1,-1 + db 3 + db 6,10, 10,12, 12,6, -1,-1 + db 4 + db 7,9, 9,7, 11,13, 13,11 + db 3 + db 8,10, 10,14, 14,8, -1,-1 + db 4 + db 9,13, 13,9, 9,-1, 13,-1 + db 3 + db 10,12, 12,14, 14,10, -1,-1 + db 4 + db 11,13, 13,11, 11,-1, 13,-1 |