amiibo drops

From ZeldaMods (Breath of the Wild)
Revision as of 15:35, 26 October 2018 by imported>Leoetlino (→‎Step 2 - Determine the final drop nums)
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Drop tables

Idx Name Description
0 Normal
1 Normal2 Unused.
2 SmallHit
3 SmallHit2 Unused.
4 BigHit
5 BigHit2 Unused.
6 GreatHit
7 GreatHit2 Unused.

Notes on AmiiboMgr

amiibo code call AmiiboMgr::registerAmiibo[unofficial name][1] every time an amiibo is used.

registerAmiibo

  • First, AmiiboMgr determines if it should reset its daily amiibo use history (stored in the AmiiboTouchHistory flag)[2].
    • If less than 86400 seconds (1 day) have elapsed since the game was launched, don't do anything.[check]
    • AmiiboMgr then computes 10000 * now.year + 100 * now.month + now.day. If the value is different from AmiiboLastTouchDate (which would mean that a day has elapsed), the AmiiboTouchHistory array is cleared.
  • The amiibo UID is inserted into AmiiboTouchHistory. Only the last 100 entries are kept.
  • It is also inserted into AmiiboTouchHistoryTotal. Only the last 200 entries are kept.
  • Finally, AmiiboLastTouchDate is set to 10000 * now.year + 100 * now.month + now.day.

Logic

AIDef:Action/ItemAmiiboCreateFromDropTable (the action that is responsible for determining the drop table and spawning the drops) follows the following process:

Step 1 - Determine drop rates and drop nums (in practice)

  • Drop table category:
    • Remain if Find_4Relic_1stClear is set
    • Parasail if IsGet_PlayerStole2 is set
    • Normal otherwise
  • Great Hit rate: 20% if the amiibo has been scanned 0, 1, 2, 3 or 4 times and 100% otherwise
  • Big Hit rate: 0% if there is a GreatHit, 100% otherwise
  • Small Hit rate: 20%
  • Drop num rate: 20%
  • For each drop table ({Normal,SmallHit,BigHit,GreatHit}{,2}), calculate the actual drop num.
    • 0 if the table doesn't exist in the bdrop
    • max(1, repeatNum) otherwise
    • Note: For BigHit and GreatHit tables, (Remain), (Parasail) or (Normal) are appended to the table name.

Step 2 - Determine the final drop nums

Final drop nums after RNG (note: negative values are set to 0)
Normal SmallHit BigHit GreatHit
GreatHit, no BigHit N - GH SH 0 GH
No GreatHit, BigHit N - BH SH BH 0

References

  1. 0x710064B564 on Switch 1.5.0
  2. 0x710064B3C8