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Add Gen 1 Crit Chance (#5439)

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Adds GEN_1 config to B_CRIT_CHANGE, only affects the chance, not multiplier or other Gen 1 quirks.
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Pawkkie 2024-09-29 15:54:03 -04:00 committed by GitHub
parent 5e027754c7
commit 8d33169100
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GPG key ID: B5690EEEBB952194
1 changed files with 92 additions and 2 deletions
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92
src/battle_script_commands.c
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@ -1948,6 +1948,79 @@ s32 CalcCritChanceStage(u32 battlerAtk, u32 battlerDef, u32 move, bool32 recordA
u32 holdEffectAtk = GetBattlerHoldEffect(battlerAtk, TRUE);
return CalcCritChanceStageArgs(battlerAtk, battlerDef, move, recordAbility, abilityAtk, abilityDef, holdEffectAtk);
}
// Bulbapedia: https://bulbapedia.bulbagarden.net/wiki/Critical_hit#Generation_I
// Crit chance = Threshold / 256, Threshold maximum of 255
// Threshold = Base Speed / 2
// High crit move = 8 * (Base Speed / 2)
// Focus Energy = 4 * (Base Speed / 2)
s32 CalcCritChanceStageGen1(u8 battlerAtk, u8 battlerDef, u32 move, bool32 recordAbility)
{
// Vanilla
u32 focusEnergyScaler = 4;
u32 highCritRatioScaler = 8;
// Not vanilla
u32 superLuckScaler = 4;
u32 scopeLensScaler = 4;
u32 luckyPunchScaler = 8;
u32 farfetchedLeekScaler = 8;
s32 critChance = 0;
s32 moveCritStage = gMovesInfo[gCurrentMove].criticalHitStage;
s32 bonusCritStage = gBattleStruct->bonusCritStages[gBattlerAttacker]; // G-Max Chi Strike
u32 abilityAtk = GetBattlerAbility(gBattlerAttacker);
u32 abilityDef = GetBattlerAbility(gBattlerTarget);
u32 holdEffectAtk = GetBattlerHoldEffect(battlerAtk, TRUE);
u16 baseSpeed = gSpeciesInfo[gBattleMons[battlerAtk].species].baseSpeed;
critChance = baseSpeed / 2;
// Crit scaling
if (moveCritStage > 0)
critChance = critChance * highCritRatioScaler * moveCritStage;
if (bonusCritStage > 0)
critChance = critChance * bonusCritStage;
if ((gBattleMons[gBattlerAttacker].status2 & STATUS2_FOCUS_ENERGY_ANY) != 0)
critChance = critChance * focusEnergyScaler;
if (holdEffectAtk == HOLD_EFFECT_SCOPE_LENS)
critChance = critChance * scopeLensScaler;
if (holdEffectAtk == HOLD_EFFECT_LUCKY_PUNCH && gBattleMons[gBattlerAttacker].species == SPECIES_CHANSEY)
critChance = critChance * luckyPunchScaler;
if (BENEFITS_FROM_LEEK(battlerAtk, holdEffectAtk))
critChance = critChance * farfetchedLeekScaler;
if (abilityAtk == ABILITY_SUPER_LUCK)
critChance = critChance * superLuckScaler;
if (critChance > 255)
critChance = 255;
// Prevented crits
if (gSideStatuses[battlerDef] & SIDE_STATUS_LUCKY_CHANT)
critChance = -1;
else if (abilityDef == ABILITY_BATTLE_ARMOR || abilityDef == ABILITY_SHELL_ARMOR)
{
if (recordAbility)
RecordAbilityBattle(battlerDef, abilityDef);
critChance = -1;
}
// Guaranteed crits
else if (gStatuses3[battlerAtk] & STATUS3_LASER_FOCUS
|| gMovesInfo[move].alwaysCriticalHit == TRUE
|| (abilityAtk == ABILITY_MERCILESS && gBattleMons[battlerDef].status1 & STATUS1_PSN_ANY))
{
critChance = -2;
}
return critChance;
}
#undef BENEFITS_FROM_LEEK
s32 GetCritHitOdds(s32 critChanceIndex)
@ -1963,7 +2036,13 @@ static void Cmd_critcalc(void)
CMD_ARGS();
u16 partySlot;
s32 critChance = CalcCritChanceStage(gBattlerAttacker, gBattlerTarget, gCurrentMove, TRUE);
s32 critChance;
if (B_CRIT_CHANCE == GEN_1)
critChance = CalcCritChanceStageGen1(gBattlerAttacker, gBattlerTarget, gCurrentMove, TRUE);
else
critChance = CalcCritChanceStage(gBattlerAttacker, gBattlerTarget, gCurrentMove, TRUE);
gPotentialItemEffectBattler = gBattlerAttacker;
if (gBattleTypeFlags & (BATTLE_TYPE_WALLY_TUTORIAL | BATTLE_TYPE_FIRST_BATTLE))
@ -1972,8 +2051,19 @@ static void Cmd_critcalc(void)
gIsCriticalHit = FALSE;
else if (critChance == -2)
gIsCriticalHit = TRUE;
else
{
if (B_CRIT_CHANCE == GEN_1)
{
u8 critRoll = RandomUniform(RNG_CRITICAL_HIT, 1, 256);
if (critRoll <= critChance)
gIsCriticalHit = 1;
else
gIsCriticalHit = 0;
}
else
gIsCriticalHit = RandomChance(RNG_CRITICAL_HIT, 1, sCriticalHitOdds[critChance]);
}
// Counter for EVO_CRITICAL_HITS.
partySlot = gBattlerPartyIndexes[gBattlerAttacker];