ref: ecd2eb2447bf4dee4ec3be35f881c7e7102adb1b
dir: /engine/battle/experience.asm/
GainExperience: ld a, [wLinkState] cp LINK_STATE_BATTLING ret z ; return if link battle call DivideExpDataByNumMonsGainingExp ld hl, wPartyMon1 xor a ld [wWhichPokemon], a .partyMonLoop ; loop over each mon and add gained exp inc hl ld a, [hli] or [hl] ; is mon's HP 0? jp z, .nextMon ; if so, go to next mon push hl ld hl, wPartyGainExpFlags ld a, [wWhichPokemon] ld c, a ld b, FLAG_TEST predef FlagActionPredef ld a, c and a ; is mon's gain exp flag set? pop hl jp z, .nextMon ; if mon's gain exp flag not set, go to next mon ld de, (wPartyMon1HPExp + 1) - (wPartyMon1HP + 1) add hl, de ld d, h ld e, l ld hl, wEnemyMonBaseStats ld c, NUM_STATS .gainStatExpLoop ld a, [hli] ld b, a ; enemy mon base stat ld a, [de] ; stat exp add b ; add enemy mon base state to stat exp ld [de], a jr nc, .nextBaseStat ; if there was a carry, increment the upper byte dec de ld a, [de] inc a jr z, .maxStatExp ; jump if the value overflowed ld [de], a inc de jr .nextBaseStat .maxStatExp ; if the upper byte also overflowed, then we have hit the max stat exp ld a, $ff ld [de], a inc de ld [de], a .nextBaseStat dec c jr z, .statExpDone inc de inc de jr .gainStatExpLoop .statExpDone xor a ldh [hMultiplicand], a ldh [hMultiplicand + 1], a ld a, [wEnemyMonBaseExp] ldh [hMultiplicand + 2], a ld a, [wEnemyMonLevel] ldh [hMultiplier], a call Multiply ld a, 7 ldh [hDivisor], a ld b, 4 call Divide ld hl, wPartyMon1OTID - (wPartyMon1DVs - 1) add hl, de ld b, [hl] ; party mon OTID inc hl ld a, [wPlayerID] cp b jr nz, .tradedMon ld b, [hl] ld a, [wPlayerID + 1] cp b ld a, 0 jr z, .next .tradedMon call BoostExp ; traded mon exp boost ld a, 1 .next ld [wGainBoostedExp], a ld a, [wIsInBattle] dec a ; is it a trainer battle? call nz, BoostExp ; if so, boost exp inc hl inc hl inc hl ; add the gained exp to the party mon's exp ld b, [hl] ldh a, [hQuotient + 3] ld [wExpAmountGained + 1], a add b ld [hld], a ld b, [hl] ldh a, [hQuotient + 2] ld [wExpAmountGained], a adc b ld [hl], a jr nc, .noCarry dec hl inc [hl] inc hl .noCarry ; calculate exp for the mon at max level, and cap the exp at that value inc hl push hl ld a, [wWhichPokemon] ld c, a ld b, 0 ld hl, wPartySpecies add hl, bc ld a, [hl] ; species ld [wd0b5], a call GetMonHeader ld d, MAX_LEVEL callfar CalcExperience ; get max exp ; compare max exp with current exp ldh a, [hExperience] ld b, a ldh a, [hExperience + 1] ld c, a ldh a, [hExperience + 2] ld d, a pop hl ld a, [hld] sub d ld a, [hld] sbc c ld a, [hl] sbc b jr c, .next2 ; the mon's exp is greater than the max exp, so overwrite it with the max exp ld a, b ld [hli], a ld a, c ld [hli], a ld a, d ld [hld], a dec hl .next2 push hl ld a, [wWhichPokemon] ld hl, wPartyMonNicks call GetPartyMonName ld hl, GainedText call PrintText xor a ; PLAYER_PARTY_DATA ld [wMonDataLocation], a call LoadMonData pop hl ld bc, wPartyMon1Level - wPartyMon1Exp add hl, bc push hl farcall CalcLevelFromExperience pop hl ld a, [hl] ; current level cp d jp z, .nextMon ; if level didn't change, go to next mon ld a, [wCurEnemyLVL] push af push hl ld a, d ld [wCurEnemyLVL], a ld [hl], a ld bc, wPartyMon1Species - wPartyMon1Level add hl, bc ld a, [hl] ; species ld [wd0b5], a ld [wd11e], a call GetMonHeader ld bc, (wPartyMon1MaxHP + 1) - wPartyMon1Species add hl, bc push hl ld a, [hld] ld c, a ld b, [hl] push bc ; push max HP (from before levelling up) ld d, h ld e, l ld bc, (wPartyMon1HPExp - 1) - wPartyMon1MaxHP add hl, bc ld b, $1 ; consider stat exp when calculating stats call CalcStats pop bc ; pop max HP (from before levelling up) pop hl ld a, [hld] sub c ld c, a ld a, [hl] sbc b ld b, a ; bc = difference between old max HP and new max HP after levelling ld de, (wPartyMon1HP + 1) - wPartyMon1MaxHP add hl, de ; add to the current HP the amount of max HP gained when levelling ld a, [hl] ; wPartyMon1HP + 1 add c ld [hld], a ld a, [hl] ; wPartyMon1HP + 1 adc b ld [hl], a ; wPartyMon1HP ld a, [wPlayerMonNumber] ld b, a ld a, [wWhichPokemon] cp b ; is the current mon in battle? jr nz, .printGrewLevelText ; current mon is in battle ld de, wBattleMonHP ; copy party mon HP to battle mon HP ld a, [hli] ld [de], a inc de ld a, [hl] ld [de], a ; copy other stats from party mon to battle mon ld bc, wPartyMon1Level - (wPartyMon1HP + 1) add hl, bc push hl ld de, wBattleMonLevel ld bc, 1 + NUM_STATS * 2 ; size of stats call CopyData pop hl ld a, [wPlayerBattleStatus3] bit 3, a ; is the mon transformed? jr nz, .recalcStatChanges ; the mon is not transformed, so update the unmodified stats ld de, wPlayerMonUnmodifiedLevel ld bc, 1 + NUM_STATS * 2 call CopyData .recalcStatChanges xor a ; battle mon ld [wCalculateWhoseStats], a callfar CalculateModifiedStats callfar ApplyBurnAndParalysisPenaltiesToPlayer callfar ApplyBadgeStatBoosts callfar DrawPlayerHUDAndHPBar callfar PrintEmptyString call SaveScreenTilesToBuffer1 .printGrewLevelText ld hl, GrewLevelText call PrintText xor a ; PLAYER_PARTY_DATA ld [wMonDataLocation], a call LoadMonData ld d, $1 callfar PrintStatsBox call WaitForTextScrollButtonPress call LoadScreenTilesFromBuffer1 xor a ; PLAYER_PARTY_DATA ld [wMonDataLocation], a ld a, [wd0b5] ld [wd11e], a predef LearnMoveFromLevelUp ld hl, wCanEvolveFlags ld a, [wWhichPokemon] ld c, a ld b, FLAG_SET predef FlagActionPredef pop hl pop af ld [wCurEnemyLVL], a .nextMon ld a, [wPartyCount] ld b, a ld a, [wWhichPokemon] inc a cp b jr z, .done ld [wWhichPokemon], a ld bc, wPartyMon2 - wPartyMon1 ld hl, wPartyMon1 call AddNTimes jp .partyMonLoop .done ld hl, wPartyGainExpFlags xor a ld [hl], a ; clear gain exp flags ld a, [wPlayerMonNumber] ld c, a ld b, FLAG_SET push bc predef FlagActionPredef ; set the gain exp flag for the mon that is currently out ld hl, wPartyFoughtCurrentEnemyFlags xor a ld [hl], a pop bc predef_jump FlagActionPredef ; set the fought current enemy flag for the mon that is currently out ; divide enemy base stats, catch rate, and base exp by the number of mons gaining exp DivideExpDataByNumMonsGainingExp: ld a, [wPartyGainExpFlags] ld b, a xor a ld c, $8 ld d, $0 .countSetBitsLoop ; loop to count set bits in wPartyGainExpFlags xor a srl b adc d ld d, a dec c jr nz, .countSetBitsLoop cp $2 ret c ; return if only one mon is gaining exp ld [wd11e], a ; store number of mons gaining exp ld hl, wEnemyMonBaseStats ld c, wEnemyMonBaseExp + 1 - wEnemyMonBaseStats .divideLoop xor a ldh [hDividend], a ld a, [hl] ldh [hDividend + 1], a ld a, [wd11e] ldh [hDivisor], a ld b, $2 call Divide ; divide value by number of mons gaining exp ldh a, [hQuotient + 3] ld [hli], a dec c jr nz, .divideLoop ret ; multiplies exp by 1.5 BoostExp: ldh a, [hQuotient + 2] ld b, a ldh a, [hQuotient + 3] ld c, a srl b rr c add c ldh [hQuotient + 3], a ldh a, [hQuotient + 2] adc b ldh [hQuotient + 2], a ret GainedText: text_far _GainedText text_asm ld a, [wBoostExpByExpAll] ld hl, WithExpAllText and a ret nz ld hl, ExpPointsText ld a, [wGainBoostedExp] and a ret z ld hl, BoostedText ret WithExpAllText: text_far _WithExpAllText text_asm ld hl, ExpPointsText ret BoostedText: text_far _BoostedText ExpPointsText: text_far _ExpPointsText text_end GrewLevelText: text_far _GrewLevelText sound_level_up text_end