private static void SetValuesFromSeedXDRNG(PKM pk, uint seed)
{
var rng = RNG.XDRNG;
switch (pk.Species)
{
case 197: // Colo Umbreon
case 133: // XD Eevee
pk.TID = (int)((seed = rng.Next(seed)) >> 16);
pk.SID = (int)((seed = rng.Next(seed)) >> 16);
seed = rng.Advance(seed, 2); // PID calls consumed
break;
case 196: // Colo Espeon
pk.TID = (int)((seed = rng.Next(seed)) >> 16);
pk.SID = (int)((seed = rng.Next(seed)) >> 16);
seed = rng.Advance(seed, 9); // PID calls consumed, skip over Umbreon
break;
}
var A = rng.Next(seed); // IV1
var B = rng.Next(A); // IV2
var C = rng.Next(B); // Ability?
var D = rng.Next(C); // PID
var E = rng.Next(D); // PID
pk.PID = (D & 0xFFFF0000) | E >> 16;
pk.IVs = MethodFinder.GetIVsInt32(A >> 16, B >> 16);
}
private static void SetValuesFromSeedLCRNG(PKM pk, PIDType type, uint seed)
{
var rng = RNG.LCRNG;
var A = rng.Next(seed);
var B = rng.Next(A);
var skipBetweenPID = type is PIDType.Method_3 or PIDType.Method_3_Unown;
if (skipBetweenPID) // VBlank skip between PID rand() [RARE]
{
B = rng.Next(B);
}
var swappedPIDHalves = type is >= PIDType.Method_1_Unown and <= PIDType.Method_4_Unown;
if (swappedPIDHalves) // switched order of PID halves, "BA.."
{
pk.PID = (A & 0xFFFF0000) | B >> 16;
}
else
{
pk.PID = (B & 0xFFFF0000) | A >> 16;
}
var C = rng.Next(B);
var skipIV1Frame = type is PIDType.Method_2 or PIDType.Method_2_Unown;
if (skipIV1Frame) // VBlank skip after PID
{
C = rng.Next(C);
}
var D = rng.Next(C);
var skipIV2Frame = type is PIDType.Method_4 or PIDType.Method_4_Unown;
if (skipIV2Frame) // VBlank skip between IVs
{
D = rng.Next(D);
}
Span <int> IVs = stackalloc int[6];
MethodFinder.GetIVsInt32(IVs, C >> 16, D >> 16);
if (type == PIDType.Method_1_Roamer)
{
// Only store lowest 8 bits of IV data; zero out the other bits.
IVs[1] &= 7;
for (int i = 2; i < 6; i++)
{
IVs[i] = 0;
}
}
pk.SetIVs(IVs);
}
private static void SetValuesFromSeedLCRNG(PKM pk, PIDType type, uint seed)
{
var rng = RNG.LCRNG;
var A = rng.Next(seed);
var B = rng.Next(A);
var pid = (B & 0xFFFF0000) | A >> 16;
if (type == PIDType.Method_1_Unown || type == PIDType.Method_2_Unown || type == PIDType.Method_4_Unown)
{
pk.PID = (pid >> 16) | (pid << 16); // swap halves
}
else
{
pk.PID = pid;
}
var skipIV1Frame = type == PIDType.Method_2 || type == PIDType.Method_2_Unown;
if (skipIV1Frame)
{
B = rng.Next(B);
}
var C = rng.Next(B);
var D = rng.Next(C);
var skipIV2Frame = type == PIDType.Method_4 || type == PIDType.Method_4_Unown;
if (skipIV2Frame)
{
D = rng.Next(D);
}
var IVs = MethodFinder.GetIVsInt32(C >> 16, D >> 16);
if (type == PIDType.Method_1_Roamer)
{
IVs[1] &= 7;
for (int i = 2; i < 6; i++)
{
IVs[i] = 0;
}
}
pk.IVs = IVs;
}
public static void SetRandomChainShinyPID(PKM pk, uint seed)
{
// 13 rand bits
// 1 3-bit for upper
// 1 3-bit for lower
uint Next() => (seed = RNG.LCRNG.Next(seed)) >> 16;
uint lower = Next() & 7;
uint upper = Next() & 7;
for (int i = 0; i < 13; i++)
{
lower |= (Next() & 1) << (3 + i);
}
upper = ((uint)(lower ^ pk.TID ^ pk.SID) & 0xFFF8) | (upper & 0x7);
pk.PID = upper << 16 | lower;
pk.IVs = MethodFinder.GetIVsInt32(Next(), Next());
}
private static void SetValuesFromSeedBACD(PKM pk, PIDType type, uint seed)
{
var rng = RNG.LCRNG;
bool shiny = type == PIDType.BACD_R_S || type == PIDType.BACD_U_S;
uint X = shiny ? rng.Next(seed) : seed;
var A = rng.Next(X);
var B = rng.Next(A);
var C = rng.Next(B);
var D = rng.Next(C);
if (shiny)
{
uint PID = (X & 0xFFFF0000) | ((uint)pk.SID ^ (uint)pk.TID ^ X >> 16);
PID &= 0xFFFFFFF8;
PID |= B >> 16 & 0x7; // lowest 3 bits
pk.PID = PID;
}
else if (type == PIDType.BACD_R_AX || type == PIDType.BACD_U_AX)
{
uint low = B >> 16;
pk.PID = ((A & 0xFFFF0000) ^ (((uint)pk.TID ^ (uint)pk.SID ^ low) << 16)) | low;
}
else
{
pk.PID = (A & 0xFFFF0000) | B >> 16;
}
pk.IVs = MethodFinder.GetIVsInt32(C >> 16, D >> 16);
bool antishiny = type == PIDType.BACD_R_A || type == PIDType.BACD_U_A;
while (antishiny && pk.IsShiny)
{
pk.PID = unchecked (pk.PID + 1);
}
}