ref: 20ebfd079f1331af5cc4f0edea35163b5b35612d
dir: /engine/pokemon/experience.asm/
; calculates the level a mon should be based on its current exp CalcLevelFromExperience:: ld a, [wLoadedMonSpecies] ld [wd0b5], a call GetMonHeader ld d, $1 ; init level to 1 .loop inc d ; increment level call CalcExperience push hl ld hl, wLoadedMonExp + 2 ; current exp ; compare exp needed for level d with current exp ldh a, [hExperience + 2] ld c, a ld a, [hld] sub c ldh a, [hExperience + 1] ld c, a ld a, [hld] sbc c ldh a, [hExperience] ld c, a ld a, [hl] sbc c pop hl jr nc, .loop ; if exp needed for level d is not greater than exp, try the next level dec d ; since the exp was too high on the last loop iteration, go back to the previous value and return ret ; calculates the amount of experience needed for level d CalcExperience:: ld a, [wMonHGrowthRate] add a add a ld c, a ld b, 0 ld hl, GrowthRateTable add hl, bc call CalcDSquared ld a, d ldh [hMultiplier], a call Multiply ld a, [hl] and $f0 swap a ldh [hMultiplier], a call Multiply ld a, [hli] and $f ldh [hDivisor], a ld b, $4 call Divide ldh a, [hQuotient + 1] push af ldh a, [hQuotient + 2] push af ldh a, [hQuotient + 3] push af call CalcDSquared ld a, [hl] and $7f ldh [hMultiplier], a call Multiply ldh a, [hProduct + 1] push af ldh a, [hProduct + 2] push af ldh a, [hProduct + 3] push af ld a, [hli] push af xor a ldh [hMultiplicand], a ldh [hMultiplicand + 1], a ld a, d ldh [hMultiplicand + 2], a ld a, [hli] ldh [hMultiplier], a call Multiply ld b, [hl] ldh a, [hProduct + 3] sub b ldh [hProduct + 3], a ld b, $0 ldh a, [hProduct + 2] sbc b ldh [hProduct + 2], a ldh a, [hProduct + 1] sbc b ldh [hProduct + 1], a ; The difference of the linear term and the constant term consists of 3 bytes ; starting at hProduct + 1. Below, hExperience (an alias of that address) will ; be used instead for the further work of adding or subtracting the squared ; term and adding the cubed term. pop af and $80 jr nz, .subtractSquaredTerm ; check sign pop bc ldh a, [hExperience + 2] add b ldh [hExperience + 2], a pop bc ldh a, [hExperience + 1] adc b ldh [hExperience + 1], a pop bc ldh a, [hExperience] adc b ldh [hExperience], a jr .addCubedTerm .subtractSquaredTerm pop bc ldh a, [hExperience + 2] sub b ldh [hExperience + 2], a pop bc ldh a, [hExperience + 1] sbc b ldh [hExperience + 1], a pop bc ldh a, [hExperience] sbc b ldh [hExperience], a .addCubedTerm pop bc ldh a, [hExperience + 2] add b ldh [hExperience + 2], a pop bc ldh a, [hExperience + 1] adc b ldh [hExperience + 1], a pop bc ldh a, [hExperience] adc b ldh [hExperience], a ret ; calculates d*d CalcDSquared: xor a ldh [hMultiplicand], a ldh [hMultiplicand + 1], a ld a, d ldh [hMultiplicand + 2], a ldh [hMultiplier], a jp Multiply INCLUDE "data/growth_rates.asm"