mirror of
https://github.com/kwsch/PKHeX
synced 2024-11-15 08:47:14 +00:00
c301ce88ab
Random isn't thread safe; users of PKHeX.Core.dll might run multithreaded operations (see PKSM + ALM), so we need to have a thread-specific RNG available. Thread Local get; to improve performance, save the random object locally whenever it is used more than once in the method. https://docs.microsoft.com/en-us/dotnet/api/system.threading.threadlocal-1?redirectedfrom=MSDN&view=netframework-4.8 https://stackoverflow.com/questions/18333885/threadstatic-v-s-threadlocalt-is-generic-better-than-attribute/18337158#18337158
416 lines
14 KiB
C#
416 lines
14 KiB
C#
using System;
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namespace PKHeX.Core
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{
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public static class PIDGenerator
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{
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private static void SetValuesFromSeedLCRNG(PKM pk, PIDType type, uint seed)
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{
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var rng = RNG.LCRNG;
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var A = rng.Next(seed);
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var B = rng.Next(A);
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var skipBetweenPID = type == PIDType.Method_3 || type == PIDType.Method_3_Unown;
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if (skipBetweenPID) // VBlank skip between PID rand() [RARE]
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B = rng.Next(B);
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var swappedPIDHalves = PIDType.Method_1_Unown <= type && type <= PIDType.Method_4_Unown;
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if (swappedPIDHalves) // switched order of PID halves, "BA.."
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pk.PID = (A & 0xFFFF0000) | B >> 16;
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else
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pk.PID = (B & 0xFFFF0000) | A >> 16;
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var C = rng.Next(B);
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var skipIV1Frame = type == PIDType.Method_2 || type == PIDType.Method_2_Unown;
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if (skipIV1Frame) // VBlank skip after PID
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C = rng.Next(C);
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var D = rng.Next(C);
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var skipIV2Frame = type == PIDType.Method_4 || type == PIDType.Method_4_Unown;
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if (skipIV2Frame) // VBlank skip between IVs
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D = rng.Next(D);
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var IVs = MethodFinder.GetIVsInt32(C >> 16, D >> 16);
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if (type == PIDType.Method_1_Roamer)
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{
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// Only store lowest 8 bits of IV data; zero out the other bits.
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IVs[1] &= 7;
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for (int i = 2; i < 6; i++)
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IVs[i] = 0;
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}
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pk.IVs = IVs;
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}
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private static void SetValuesFromSeedBACD(PKM pk, PIDType type, uint seed)
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{
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var rng = RNG.LCRNG;
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bool shiny = type == PIDType.BACD_R_S || type == PIDType.BACD_U_S;
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uint X = shiny ? rng.Next(seed) : seed;
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var A = rng.Next(X);
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var B = rng.Next(A);
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var C = rng.Next(B);
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var D = rng.Next(C);
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if (shiny)
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{
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uint PID = (X & 0xFFFF0000) | ((uint)pk.SID ^ (uint)pk.TID ^ X >> 16);
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PID &= 0xFFFFFFF8;
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PID |= B >> 16 & 0x7; // lowest 3 bits
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pk.PID = PID;
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}
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else if (type == PIDType.BACD_R_AX || type == PIDType.BACD_U_AX)
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{
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uint low = B >> 16;
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pk.PID = ((A & 0xFFFF0000) ^ (((uint)pk.TID ^ (uint)pk.SID ^ low) << 16)) | low;
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}
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else
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{
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pk.PID = (A & 0xFFFF0000) | B >> 16;
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}
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pk.IVs = MethodFinder.GetIVsInt32(C >> 16, D >> 16);
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bool antishiny = type == PIDType.BACD_R_A || type == PIDType.BACD_U_A;
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while (antishiny && pk.IsShiny)
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pk.PID = unchecked(pk.PID + 1);
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}
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private static void SetValuesFromSeedXDRNG(PKM pk, uint seed)
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{
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var rng = RNG.XDRNG;
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switch (pk.Species)
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{
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case (int)Species.Umbreon: // Colo Umbreon
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case (int)Species.Eevee: // XD Eevee
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pk.TID = (int)((seed = rng.Next(seed)) >> 16);
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pk.SID = (int)((seed = rng.Next(seed)) >> 16);
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seed = rng.Advance(seed, 2); // PID calls consumed
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break;
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case (int)Species.Espeon: // Colo Espeon
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pk.TID = (int)((seed = rng.Next(seed)) >> 16);
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pk.SID = (int)((seed = rng.Next(seed)) >> 16);
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seed = rng.Advance(seed, 9); // PID calls consumed, skip over Umbreon
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break;
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}
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var A = rng.Next(seed); // IV1
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var B = rng.Next(A); // IV2
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var C = rng.Next(B); // Ability?
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var D = rng.Next(C); // PID
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var E = rng.Next(D); // PID
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pk.PID = (D & 0xFFFF0000) | E >> 16;
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pk.IVs = MethodFinder.GetIVsInt32(A >> 16, B >> 16);
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}
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private static void SetValuesFromSeedChannel(PKM pk, uint seed)
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{
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var rng = RNG.XDRNG;
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var O = rng.Next(seed); // SID
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var A = rng.Next(O); // PID
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var B = rng.Next(A); // PID
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var C = rng.Next(B); // Held Item
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var D = rng.Next(C); // Version
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var E = rng.Next(D); // OT Gender
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const int TID = 40122;
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var SID = (int)(O >> 16);
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var pid1 = A >> 16;
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var pid2 = B >> 16;
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pk.TID = TID;
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pk.SID = SID;
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var pid = pid1 << 16 | pid2;
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if ((pid2 > 7 ? 0 : 1) != (pid1 ^ SID ^ TID))
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pid ^= 0x80000000;
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pk.PID = pid;
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pk.HeldItem = (int)(C >> 31) + 169; // 0-Ganlon, 1-Salac
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pk.Version = (int)(D >> 31) + 1; // 0-Sapphire, 1-Ruby
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pk.OT_Gender = (int)(E >> 31);
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pk.IVs = rng.GetSequentialIVsInt32(E);
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}
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public static void SetValuesFromSeed(PKM pk, PIDType type, uint seed)
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{
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var method = GetGeneratorMethod(type);
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method(pk, seed);
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}
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private static Action<PKM, uint> GetGeneratorMethod(PIDType t)
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{
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switch (t)
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{
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case PIDType.Channel:
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return SetValuesFromSeedChannel;
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case PIDType.CXD:
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return SetValuesFromSeedXDRNG;
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case PIDType.Method_1:
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case PIDType.Method_2:
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case PIDType.Method_3:
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case PIDType.Method_4:
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case PIDType.Method_1_Unown:
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case PIDType.Method_2_Unown:
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case PIDType.Method_3_Unown:
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case PIDType.Method_4_Unown:
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case PIDType.Method_1_Roamer:
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return (pk, seed) => SetValuesFromSeedLCRNG(pk, t, seed);
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case PIDType.BACD_R:
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case PIDType.BACD_R_A:
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case PIDType.BACD_R_S:
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return (pk, seed) => SetValuesFromSeedBACD(pk, t, seed & 0xFFFF);
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case PIDType.BACD_U:
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case PIDType.BACD_U_A:
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case PIDType.BACD_U_S:
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return (pk, seed) => SetValuesFromSeedBACD(pk, t, seed);
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case PIDType.PokeSpot:
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return SetRandomPIDIV;
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case PIDType.G5MGShiny:
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return SetValuesFromSeedMG5Shiny;
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case PIDType.Pokewalker:
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return (pk, seed) => pk.PID = GetPokeWalkerPID(pk.TID, pk.SID, seed%24, pk.Gender, pk.PersonalInfo.Gender);
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// others: unimplemented
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case PIDType.CuteCharm:
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break;
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case PIDType.ChainShiny:
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return SetRandomChainShinyPID;
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case PIDType.G4MGAntiShiny:
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break;
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}
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return (_, __) => { };
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}
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public static void SetRandomChainShinyPID(PKM pk, uint seed)
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{
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// 13 rand bits
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// 1 3-bit for upper
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// 1 3-bit for lower
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uint Next() => (seed = RNG.LCRNG.Next(seed)) >> 16;
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uint lower = Next() & 7;
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uint upper = Next() & 7;
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for (int i = 0; i < 13; i++)
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lower |= (Next() & 1) << (3 + i);
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upper = ((uint)(lower ^ pk.TID ^ pk.SID) & 0xFFF8) | (upper & 0x7);
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pk.PID = upper << 16 | lower;
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pk.IVs = MethodFinder.GetIVsInt32(Next(), Next());
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}
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public static void SetRandomPokeSpotPID(PKM pk, int nature, int gender, int ability, int slot)
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{
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while (true)
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{
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var seed = Util.Rand32();
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if (!MethodFinder.IsPokeSpotActivation(slot, seed, out var _))
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continue;
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var rng = RNG.XDRNG;
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var D = rng.Next(seed); // PID
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var E = rng.Next(D); // PID
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pk.PID = (D & 0xFFFF0000) | E >> 16;
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if (!IsValidCriteria4(pk, nature, ability, gender))
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continue;
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pk.SetRandomIVs();
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return;
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}
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}
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public static uint GetMG5ShinyPID(uint gval, uint av, int TID, int SID)
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{
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uint PID = (uint)((TID ^ SID ^ gval) << 16 | gval);
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if ((PID & 0x10000) != av << 16)
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PID ^= 0x10000;
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return PID;
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}
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public static uint GetPokeWalkerPID(int TID, int SID, uint nature, int gender, int gr)
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{
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if (nature >= 24)
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nature = 0;
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uint pid = (uint)((TID ^ SID) >> 8 ^ 0xFF) << 24; // the most significant byte of the PID is chosen so the Pokémon can never be shiny.
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// Ensure nature is set to required nature without affecting shininess
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pid += nature - (pid % 25);
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if (gr >= 0xFE || gr == 0) // non-dual gender
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return pid;
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// Ensure Gender is set to required gender without affecting other properties
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// If Gender is modified, modify the ability if appropriate
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// either m/f
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var pidGender = (pid & 0xFF) < gr ? 1 : 0;
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if (gender == pidGender)
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return pid;
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if (gender == 0) // Male
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{
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pid += (uint)((((gr - (pid & 0xFF)) / 25) + 1) * 25);
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if ((nature & 1) != (pid & 1))
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pid += 25;
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}
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else
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{
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pid -= (uint)(((((pid & 0xFF) - gr) / 25) + 1) * 25);
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if ((nature & 1) != (pid & 1))
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pid -= 25;
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}
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return pid;
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}
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public static void SetValuesFromSeedMG5Shiny(PKM pk, uint seed)
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{
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var gv = seed >> 24;
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var av = seed & 1; // arbitrary choice
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pk.PID = GetMG5ShinyPID(gv, av, pk.TID, pk.SID);
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SetRandomIVs(pk);
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}
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public static void SetRandomWildPID(PKM pk, int gen, int nature, int ability, int gender, PIDType specific = PIDType.None)
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{
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if (specific == PIDType.Pokewalker)
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{
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pk.Gender = gender;
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do
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{
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pk.PID = GetPokeWalkerPID(pk.TID, pk.SID, (uint) nature, gender, pk.PersonalInfo.Gender);
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} while (!pk.IsGenderValid());
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pk.RefreshAbility((int)(pk.PID & 1));
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SetRandomIVs(pk);
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return;
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}
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switch (gen)
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{
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case 3:
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case 4:
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SetRandomWildPID4(pk, nature, ability, gender, specific);
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break;
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case 5:
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SetRandomWildPID5(pk, nature, ability, gender, specific);
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break;
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default:
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SetRandomWildPID(pk, nature, ability, gender);
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break;
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}
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}
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/// <summary>
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/// Generates a <see cref="PKM.PID"/> and <see cref="PKM.IVs"/> that are unrelated.
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/// </summary>
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/// <param name="pkm">Pokémon to modify.</param>
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/// <param name="seed">Seed which is used for the <see cref="PKM.PID"/>.</param>
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private static void SetRandomPIDIV(PKM pkm, uint seed)
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{
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pkm.PID = seed;
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SetRandomIVs(pkm);
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}
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private static void SetRandomWildPID4(PKM pk, int nature, int ability, int gender, PIDType specific = PIDType.None)
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{
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pk.RefreshAbility(ability);
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pk.Gender = gender;
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var type = GetPIDType(pk, specific);
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var method = GetGeneratorMethod(type);
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while (true)
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{
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method(pk, Util.Rand32());
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if (!IsValidCriteria4(pk, nature, ability, gender))
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continue;
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return;
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}
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}
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private static bool IsValidCriteria4(PKM pk, int nature, int ability, int gender)
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{
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if (pk.GetSaneGender() != gender)
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return false;
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if (pk.Nature != nature)
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return false;
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if ((pk.PID & 1) != ability)
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return false;
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return true;
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}
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private static PIDType GetPIDType(PKM pk, PIDType specific)
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{
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if (specific != PIDType.None)
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return specific;
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if (pk.Version == 15)
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return PIDType.CXD;
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if (pk.Gen3 && pk.Species == (int)Species.Unown)
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return PIDType.Method_1_Unown + Util.Rand.Next(3);
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return PIDType.Method_1;
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}
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private static void SetRandomWildPID5(PKM pk, int nature, int ability, int gender, PIDType specific = PIDType.None)
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{
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var tidbit = (pk.TID ^ pk.SID) & 1;
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pk.RefreshAbility(ability);
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pk.Gender = gender;
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pk.Nature = nature;
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if (ability == 2)
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ability = 0;
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while (true)
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{
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uint seed = Util.Rand32();
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if (specific == PIDType.G5MGShiny)
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{
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SetValuesFromSeedMG5Shiny(pk, seed);
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seed = pk.PID;
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}
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else
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{
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var bitxor = (seed >> 31) ^ (seed & 1);
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if (bitxor != tidbit)
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seed ^= 1;
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}
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if (((seed >> 16) & 1) != ability)
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continue;
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pk.PID = seed;
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if (pk.GetSaneGender() != gender)
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continue;
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SetRandomIVs(pk);
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return;
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}
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}
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private static void SetRandomWildPID(PKM pk, int nature, int ability, int gender)
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{
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uint seed = Util.Rand32();
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pk.PID = seed;
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pk.Nature = nature;
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pk.Gender = gender;
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pk.RefreshAbility(ability);
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SetRandomIVs(pk);
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}
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private static void SetRandomIVs(PKM pk)
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{
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var rng = Util.Rand;
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pk.IVs = new[]
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{
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rng.Next(32),
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rng.Next(32),
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rng.Next(32),
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rng.Next(32),
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rng.Next(32),
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rng.Next(32),
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};
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}
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}
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}
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