Mario Kart: Double Dash!! (the doldecomp decompilation, doldecomp/mkdd)

In the doldecomp decompilation of Mario Kart: Double Dash!!, which builds a USA debug version (MarioClub_us) and whose item manager, Sato/ItemObjMgr.cpp, does not yet match the game's code, the item pick reads byte weights from a file on the disc, /Item/ItemSlotList.dat (or ItemSlotList1.dat or ItemSlotList2.dat, by the race's item-slot type). The file holds lists, each with a row of weights for every place, and a Grand Prix or Versus pick reads the row for the kart's place less one. Outside LAN play, Grand Prix reads a list by engine class (150cc and Mirror share one) for human players and the next list for CPU drivers, and Versus reads one list for every driver by the number of karts, two to four. The pick adds the row's weights for nine common kinds and for the driver's own special item, draws a whole number below the total (computed), and walks the running sum. The special's weight is multiplied by 1.5 when the two riders are a default pairing (isDefaultCharCombi), and the special is left out when the partner holds or stocks a special item, or when it is ItemHeart and the kart already has one; four common kinds (ItemThunder, ItemStar, ItemKinokoSuc, and ItemFlyTurtle, which the atlas reads as the Spiny Shell) are left out when the partner holds or stocks the same kind. startShuffle clears the flag the code calls _7, and startItemShuffleSingle sets it when its doShuffle argument is true; with it set, the pick first draws among the specials alone. setDynamicRate, which copies the weights the pick reads, writes 0 for any kind whose IsAbleToCreateItem is false (a function the decompilers comment as fabricated), and in Grand Prix multiplies the CPU list's ItemFlyTurtle weight by 1.5 while RivalBodyCtrl::isPlayerFirst() is true. In Grand Prix, Mario Kart 64 instead reads one byte from a 100-slot row for the place, from a human or a CPU table, with no partner or character in the pick. mkdd/item-slot

About: Mario Kart: Double Dash!! Item distribution

{
 "common-kinds": 9,
 "special-kinds": 9,
 "default-pair-factor": 1.5,
 "cpu-spiny-factor-player-first": 1.5
}

The weights are data on the disc, so the chance of each item by place isn't read here; a USA disc's ItemSlotList.dat would give them. The nine common kinds are, by class, ItemGTurtle, ItemRTurtle, ItemFlyTurtle, ItemBanana, ItemKinoko, ItemKinokoSuc, ItemStar, ItemThunder, and ItemFakeItemBox (sSlotItemIndex[0..8] against the switch at L347-L432); the atlas reads them as the green and red shells, the Spiny Shell, the banana, the mushroom, triple mushrooms, the star, lightning, and the fake item box. Which special a driver has comes from ItemObj::getSpecialKind, still an empty file (src/Sato/ItemObj.cpp), so the character-to-item table isn't read. No caller of SlotItem or setAllDynamicRate is in the decompiled code, so when the copy is refreshed isn't shown, and who sets the isPlayerFirst bit (RivalBodyCtrl, NonMatching) isn't traced. LAN play remaps rows for five to seven karts (sSlotTblIndexForLAN_*); Balloon Battle picks a row by balloons behind the leader (capped at the third), and Bob-omb Blast always gives kind 8.

Cited by: Item distribution, Mario Kart: Double Dash!!

In the doldecomp decompilation of Mario Kart: Double Dash!!, which builds a USA debug version (MarioClub_us) and whose item manager, Sato/ItemObjMgr.cpp, does not yet match the game's code, King Boo and Petey (character IDs 19 and 20) get an ItemRndSpecialShuffleMgr for their item picks, as every driver does in Balloon Battle and the battle the code calls ESCAPE_BATTLE; other drivers get the plain ItemShuffleMgr. Where the plain pick adds one special item, the driver's own, the random-special pick adds all nine specials, each weighted from the row's columns 18 to 26, counting from 0 (slotTable[1][i + 18] for i from 0 to 8, computed) and multiplied by 1.5 for a default pairing unless isMiniGame() is true, and leaves out the heart when the kart already has one. It leaves all nine out when the partner holds or stocks a special item. In Grand Prix, Mario Kart 64's pick takes only the place and whether the driver is a CPU. mkdd/random-specials

About: Mario Kart: Double Dash!! Item distribution

{
 "characters": [
  19,
  20
 ],
 "specials": 9,
 "default-pair-factor": 1.5
}

"Columns 18 to 26" is computed: calcRndSpecialRatio reads column i + 18 for the nine specials, and sSlotItemIndex repeats the nine special kinds at 18 to 26. The subclass's calcRank loop runs to totalSlots, past the 18 entries of sTempSlotUseItem, but the running sum reaches the total by the 18th entry, so a draw below the total stops there (computed). The atlas reads the nine special kinds, by class, as ItemGTurtleSuc, ItemGTurtleBig, ItemBananaBig, ItemFireBallSuc, ItemBomb, ItemYoshiEgg, ItemWanWanObj, ItemGoldenKinoko, and ItemHeart (src/Sato/ItemObjMgr.cpp#L347-L432). Which character holds which special isn't read (ItemObj::getSpecialKind is in the still-empty ItemObj.cpp).

Cited by: Mario Kart: Double Dash!!