PKHeX/PKHeX.Core/Legality/RNG/Frame/Frame.cs

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namespace PKHeX.Core
{
public class Frame
{
/// <summary>
/// Ending seed value for the frame (prior to nature call).
/// </summary>
public readonly uint Seed;
public readonly LeadRequired Lead;
private readonly FrameType FrameType;
private readonly RNG RNG;
/// <summary>
/// Starting seed for the frame (to generate the frame).
/// </summary>
public uint OriginSeed { get; set; }
/// <summary>
/// RNG Call Value for the Level Calc
/// </summary>
public uint RandLevel { get; set; }
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/// <summary>
/// RNG Call Value for the Encounter Slot Calc
/// </summary>
public uint RandESV { get; set; }
public bool LevelSlotModified => Lead.IsLevelOrSlotModified() || (Lead & LeadRequired.UsesLevelCall) != 0;
public Frame(uint seed, FrameType type, RNG rng, LeadRequired lead)
{
Seed = seed;
Lead = lead;
FrameType = type;
RNG = rng;
}
/// <summary>
/// Checks the Encounter Slot for RNG calls before the Nature loop.
/// </summary>
/// <param name="slot">Slot Data</param>
/// <param name="pkm">Ancillary pkm data for determining how to check level.</param>
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/// <returns>Slot number for this frame &amp; lead value.</returns>
public bool IsSlotCompatibile(EncounterSlot slot, PKM pkm)
{
bool usesLevel = !slot.FixedLevel;
if (FrameType != FrameType.MethodH && (Lead & LeadRequired.UsesLevelCall) != 0 != usesLevel)
return false;
// Level is before Nature, but usually isn't varied. Check ESV calc first.
int s = GetSlot(slot);
if (s != slot.SlotNumber)
return false;
// Check Level Now
int lvl = SlotRange.GetLevel(slot, Lead, RandLevel);
if (pkm.HasOriginalMetLocation)
{
if (lvl != pkm.Met_Level)
return false;
}
else
{
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if (lvl > pkm.Met_Level)
return false;
}
// Check if the slot is actually encounterable (considering Sweet Scent)
bool encounterable = SlotRange.GetIsEncounterable(slot, FrameType, (int)(OriginSeed >> 16), Lead);
return encounterable;
}
/// <summary>
/// Gets the slot value for the input slot.
/// </summary>
/// <param name="slot">Slot Data</param>
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/// <returns>Slot number for this frame &amp; lead value.</returns>
private int GetSlot(EncounterSlot slot)
{
// Static and Magnet Pull do a slot search rather than slot mapping 0-99.
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return Lead != LeadRequired.StaticMagnet
? SlotRange.GetSlot(slot.Type, RandESV, FrameType)
: SlotRange.GetSlotStaticMagnet(slot, RandESV);
}
/// <summary>
/// Only use this for test methods.
/// </summary>
/// <param name="t"></param>
/// <returns></returns>
public int GetSlot(SlotType t) => SlotRange.GetSlot(t, RandESV, FrameType);
}
}