/// <summary>
/// Sets the <see cref="PKM.IVs"/> to match a provided <see cref="hiddenPowerType"/>.
/// </summary>
/// <param name="pk">Pokémon to modify.</param>
/// <param name="hiddenPowerType">Desired Hidden Power typing.</param>
public static void SetHiddenPower(this PKM pk, int hiddenPowerType)
{
Span <int> IVs = stackalloc int[6];
pk.GetIVs(IVs);
HiddenPower.SetIVsForType(hiddenPowerType, IVs, pk.Format);
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 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);
}
