2018-10-28 18:15:40 +00:00
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using System.Collections.Generic;
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2017-05-19 00:36:43 +00:00
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namespace PKHeX.Core
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{
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public static class LockFinder
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{
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2018-10-30 05:49:04 +00:00
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public static bool IsAllShadowLockValid(EncounterStaticShadow s, PIDIV pv, PKM pkm)
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2018-02-04 08:06:07 +00:00
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{
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2018-10-30 05:49:04 +00:00
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var teams = s.Locks;
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if (teams.Length == 0)
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return true;
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2018-10-22 01:55:02 +00:00
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2018-10-30 05:49:04 +00:00
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var tsv = s.Version == GameVersion.XD ? pkm.TSV : -1; // no xd shiny shadow mons
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return IsAllShadowLockValid(pv, teams, tsv);
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2018-10-29 03:28:56 +00:00
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}
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2018-10-30 05:49:04 +00:00
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public static bool IsAllShadowLockValid(PIDIV pv, IEnumerable<TeamLock> teams, int tsv = -1)
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2018-10-29 03:28:56 +00:00
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{
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foreach (var t in teams)
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{
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2018-10-30 05:49:04 +00:00
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var result = new TeamLockResult(t, pv.OriginSeed, tsv);
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if (result.Valid)
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2018-10-29 03:28:56 +00:00
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return true;
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}
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return false;
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}
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2017-11-02 04:12:44 +00:00
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// Colosseum/XD Starters
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public static bool IsXDStarterValid(uint seed, int TID, int SID)
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{
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// pidiv reversed 2x yields SID, 3x yields TID. shift by 7 if another PKM is generated prior
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var SIDf = RNG.XDRNG.Reverse(seed, 2);
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var TIDf = RNG.XDRNG.Prev(SIDf);
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return SIDf >> 16 == SID && TIDf >> 16 == TID;
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}
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2018-09-15 05:37:47 +00:00
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2017-11-02 04:12:44 +00:00
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public static bool IsColoStarterValid(int species, ref uint seed, int TID, int SID, uint pkPID, uint IV1, uint IV2)
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{
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// reverse the seed the bare minimum
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int rev = 2;
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if (species == 196)
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rev += 7;
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var rng = RNG.XDRNG;
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var SIDf = rng.Reverse(seed, rev);
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int ctr = 0;
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2018-10-28 18:15:40 +00:00
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uint temp;
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2018-05-24 13:00:29 +00:00
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while ((temp = rng.Prev(SIDf)) >> 16 != TID || SIDf >> 16 != SID)
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2017-11-02 04:12:44 +00:00
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{
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2018-05-12 15:41:23 +00:00
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SIDf = temp;
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2017-11-02 04:12:44 +00:00
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if (ctr > 32) // arbitrary
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return false;
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ctr++;
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}
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var next = rng.Next(SIDf);
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// generate Umbreon
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var PIDIV = GenerateValidColoStarterPID(ref next, TID, SID);
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if (species == 196) // need espeon, which is immediately next
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PIDIV = GenerateValidColoStarterPID(ref next, TID, SID);
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if (!PIDIV.Equals(pkPID, IV1, IV2))
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return false;
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seed = rng.Reverse(SIDf, 2);
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return true;
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}
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private struct PIDIVGroup
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{
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public uint PID;
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public uint IV1;
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public uint IV2;
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public bool Equals(uint pid, uint iv1, uint iv2) => PID == pid && IV1 == iv1 && IV2 == iv2;
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}
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private static PIDIVGroup GenerateValidColoStarterPID(ref uint uSeed, int TID, int SID)
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{
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var rng = RNG.XDRNG;
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PIDIVGroup group = new PIDIVGroup();
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uSeed = rng.Advance(uSeed, 2); // skip fakePID
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group.IV1 = (uSeed >> 16) & 0x7FFF;
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uSeed = rng.Next(uSeed);
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group.IV2 = (uSeed >> 16) & 0x7FFF;
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uSeed = rng.Next(uSeed);
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uSeed = rng.Advance(uSeed, 1); // skip ability call
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group.PID = GenerateStarterPID(ref uSeed, TID, SID);
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uSeed = rng.Advance(uSeed, 2); // PID calls consumed
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return group;
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}
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2018-09-15 05:37:47 +00:00
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2018-10-30 05:49:04 +00:00
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private static bool IsShiny(int TID, int SID, uint PID) => (TID ^ SID ^ (PID >> 16) ^ (PID & 0xFFFF)) < 8;
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2017-11-02 04:12:44 +00:00
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private static uint GenerateStarterPID(ref uint uSeed, int TID, int SID)
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{
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uint PID;
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const byte ratio = 0x20; // 12.5% F (can't be female)
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while (true)
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{
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var next = RNG.XDRNG.Next(uSeed);
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PID = (uSeed & 0xFFFF0000) | (next >> 16);
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if ((PID & 0xFF) > ratio && !IsShiny(TID, SID, PID))
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break;
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uSeed = RNG.XDRNG.Next(next);
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}
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return PID;
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}
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2017-05-19 00:36:43 +00:00
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}
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}
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