mirror of
https://github.com/kwsch/PKHeX
synced 2024-12-18 16:33:24 +00:00
395 lines
16 KiB
C#
395 lines
16 KiB
C#
using System.Collections.Generic;
|
|
using System.Linq;
|
|
|
|
namespace PKHeX.Core
|
|
{
|
|
public static class FrameFinder
|
|
{
|
|
/// <summary>
|
|
/// Checks a <see cref="PIDIV"/> to see if any encounter frames can generate the spread. Requires further filtering against matched Encounter Slots and generation patterns.
|
|
/// </summary>
|
|
/// <param name="pidiv">Matched <see cref="PIDIV"/> containing <see cref="PIDIV.RNG"/> info and <see cref="PIDIV.OriginSeed"/>.</param>
|
|
/// <param name="pk"><see cref="PKM"/> object containing various accessible information required for the encounter.</param>
|
|
/// <returns><see cref="IEnumerable{Frame}"/> to yield possible encounter details for further filtering</returns>
|
|
public static IEnumerable<Frame> GetFrames(PIDIV pidiv, PKM pk)
|
|
{
|
|
if (pidiv.RNG == null)
|
|
return Enumerable.Empty<Frame>();
|
|
FrameGenerator info = new FrameGenerator(pidiv, pk);
|
|
if (info.FrameType == FrameType.None)
|
|
return Enumerable.Empty<Frame>();
|
|
|
|
info.Nature = pk.EncryptionConstant % 25;
|
|
|
|
// gather possible nature determination seeds until a same-nature PID breaks the unrolling
|
|
var seeds = pk.Species == 201 && pk.FRLG // reversed await case
|
|
? SeedInfo.GetSeedsUntilUnownForm(pidiv, info, pk.AltForm)
|
|
: SeedInfo.GetSeedsUntilNature(pidiv, info);
|
|
|
|
var frames = pidiv.Type == PIDType.CuteCharm
|
|
? FilterCuteCharm(seeds, pidiv, info)
|
|
: FilterNatureSync(seeds, pidiv, info);
|
|
|
|
var refined = RefineFrames(frames, info);
|
|
if (pk.Gen4 && pidiv.Type == PIDType.CuteCharm) // only permit cute charm successful frames
|
|
return refined.Where(z => (z.Lead & ~LeadRequired.UsesLevelCall) == LeadRequired.CuteCharm);
|
|
return refined;
|
|
}
|
|
|
|
private static IEnumerable<Frame> RefineFrames(IEnumerable<Frame> frames, FrameGenerator info)
|
|
{
|
|
return info.FrameType == FrameType.MethodH
|
|
? RefineFrames3(frames, info)
|
|
: RefineFrames4(frames, info);
|
|
}
|
|
|
|
private static IEnumerable<Frame> RefineFrames3(IEnumerable<Frame> frames, FrameGenerator info)
|
|
{
|
|
// ESV
|
|
// Level
|
|
// Nature
|
|
// Current Seed of the frame is the Level Calc (frame before nature)
|
|
var list = new List<Frame>();
|
|
foreach (var f in frames)
|
|
{
|
|
bool noLead = !info.AllowLeads && f.Lead != LeadRequired.None;
|
|
if (noLead)
|
|
continue;
|
|
|
|
var prev = info.RNG.Prev(f.Seed); // ESV
|
|
var rand = prev >> 16;
|
|
f.RandESV = rand;
|
|
f.RandLevel = f.Seed >> 16;
|
|
f.OriginSeed = info.RNG.Prev(prev);
|
|
if (f.Lead != LeadRequired.CuteCharm) // needs proc checking
|
|
yield return f;
|
|
|
|
// Generate frames for other slots after the regular slots
|
|
if (info.AllowLeads && (f.Lead == LeadRequired.CuteCharm || f.Lead == LeadRequired.None))
|
|
list.Add(f);
|
|
}
|
|
foreach (var f in list)
|
|
{
|
|
var leadframes = GenerateLeadSpecificFrames3(f, info);
|
|
foreach (var frame in leadframes)
|
|
yield return frame;
|
|
}
|
|
}
|
|
|
|
private static IEnumerable<Frame> GenerateLeadSpecificFrames3(Frame f, FrameGenerator info)
|
|
{
|
|
// Check leads -- none in list if leads are not allowed
|
|
// Certain leads inject a RNG call
|
|
// 3 different rand places
|
|
LeadRequired lead;
|
|
var prev0 = f.Seed; // 0
|
|
var prev1 = info.RNG.Prev(f.Seed); // -1
|
|
var prev2 = info.RNG.Prev(prev1); // -2
|
|
var prev3 = info.RNG.Prev(prev2); // -3
|
|
|
|
// Rand call raw values
|
|
var p0 = prev0 >> 16;
|
|
var p1 = prev1 >> 16;
|
|
var p2 = prev2 >> 16;
|
|
|
|
// Cute Charm
|
|
// -2 ESV
|
|
// -1 Level
|
|
// 0 CC Proc (Random() % 3 != 0)
|
|
// 1 Nature
|
|
if (info.Gendered)
|
|
{
|
|
bool cc = p0 % 3 != 0;
|
|
if (f.Lead == LeadRequired.CuteCharm) // 100% required for frame base
|
|
{
|
|
if (cc)
|
|
yield return info.GetFrame(prev2, LeadRequired.CuteCharm, p2, p1, prev3);
|
|
yield break;
|
|
}
|
|
lead = cc ? LeadRequired.CuteCharm : LeadRequired.CuteCharmFail;
|
|
yield return info.GetFrame(prev2, lead, p2, p1, prev3);
|
|
}
|
|
if (f.Lead == LeadRequired.CuteCharm)
|
|
yield break;
|
|
|
|
// Pressure, Hustle, Vital Spirit = Force Maximum Level from slot
|
|
// -2 ESV
|
|
// -1 Level
|
|
// 0 LevelMax proc (Random() & 1)
|
|
// 1 Nature
|
|
bool max = p0 % 2 == 1;
|
|
lead = max ? LeadRequired.PressureHustleSpirit : LeadRequired.PressureHustleSpiritFail;
|
|
yield return info.GetFrame(prev2, lead, p2, p1, prev3);
|
|
|
|
// Keen Eye, Intimidate (Not compatible with Sweet Scent)
|
|
// -2 ESV
|
|
// -1 Level
|
|
// 0 Level Adequate Check !(Random() % 2 == 1) rejects -- rand%2==1 is adequate
|
|
// 1 Nature
|
|
// Note: if this check fails, the encounter generation routine is aborted.
|
|
if (max) // same result as above, no need to recalculate
|
|
{
|
|
lead = LeadRequired.IntimidateKeenEye;
|
|
yield return info.GetFrame(prev2, lead, p2, p1, prev3);
|
|
}
|
|
|
|
// Static or Magnet Pull
|
|
// -2 SlotProc (Random % 2 == 0)
|
|
// -1 ESV (select slot)
|
|
// 0 Level
|
|
// 1 Nature
|
|
bool force = p2 % 2 == 0;
|
|
if (force)
|
|
{
|
|
// Since a failed proc is indistinguishable from the default frame calls, only generate if it succeeds.
|
|
lead = LeadRequired.StaticMagnet;
|
|
yield return info.GetFrame(prev2, lead, p1, p0, prev3);
|
|
}
|
|
}
|
|
|
|
private static IEnumerable<Frame> RefineFrames4(IEnumerable<Frame> frames, FrameGenerator info)
|
|
{
|
|
var list = new List<Frame>();
|
|
foreach (var f in frames)
|
|
{
|
|
// Current Seed of the frame is the ESV.
|
|
var rand = f.Seed >> 16;
|
|
f.RandESV = rand;
|
|
f.RandLevel = rand; // unused
|
|
f.OriginSeed = info.RNG.Prev(f.Seed);
|
|
yield return f;
|
|
|
|
// Create a copy for level; shift ESV and origin back
|
|
var esv = f.OriginSeed >> 16;
|
|
var origin = info.RNG.Prev(f.OriginSeed);
|
|
var withLevel = info.GetFrame(f.Seed, f.Lead | LeadRequired.UsesLevelCall, esv, f.RandLevel, origin);
|
|
yield return withLevel;
|
|
|
|
if (f.Lead != LeadRequired.None)
|
|
continue;
|
|
|
|
// Generate frames for other slots after the regular slots
|
|
list.Add(f);
|
|
}
|
|
foreach (var f in list)
|
|
{
|
|
var leadframes = GenerateLeadSpecificFrames4(f, info);
|
|
foreach (var frame in leadframes)
|
|
yield return frame;
|
|
}
|
|
}
|
|
|
|
private static IEnumerable<Frame> GenerateLeadSpecificFrames4(Frame f, FrameGenerator info)
|
|
{
|
|
LeadRequired lead;
|
|
var prev0 = f.Seed; // 0
|
|
var prev1 = info.RNG.Prev(f.Seed); // -1
|
|
var prev2 = info.RNG.Prev(prev1); // -2
|
|
var prev3 = info.RNG.Prev(prev2); // -3
|
|
|
|
// Rand call raw values
|
|
var p0 = prev0 >> 16;
|
|
var p1 = prev1 >> 16;
|
|
var p2 = prev2 >> 16;
|
|
|
|
// Cute Charm
|
|
// -2 ESV
|
|
// -1 Level (Optional)
|
|
// 0 CC Proc (Random() % 3 != 0)
|
|
// 1 Nature
|
|
if (info.Gendered)
|
|
{
|
|
bool cc = (info.DPPt ? p0 / 0x5556 : p0 % 3) != 0;
|
|
if (f.Lead == LeadRequired.CuteCharm) // 100% required for frame base
|
|
{
|
|
if (!cc) yield break;
|
|
yield return info.GetFrame(prev2, LeadRequired.CuteCharm, p1, p1, prev2);
|
|
yield return info.GetFrame(prev2, LeadRequired.CuteCharm | LeadRequired.UsesLevelCall, p2, p1, prev3);
|
|
yield break;
|
|
}
|
|
lead = cc ? LeadRequired.CuteCharm : LeadRequired.CuteCharmFail;
|
|
yield return info.GetFrame(prev2, lead, p1, p1, prev2);
|
|
yield return info.GetFrame(prev2, lead | LeadRequired.UsesLevelCall, p2, p1, prev3);
|
|
}
|
|
if (f.Lead == LeadRequired.CuteCharm)
|
|
yield break;
|
|
|
|
// Pressure, Hustle, Vital Spirit = Force Maximum Level from slot
|
|
// -2 ESV
|
|
// -1 Level (Optional)
|
|
// 0 LevelMax proc (Random() & 1)
|
|
// 1 Nature
|
|
bool max = (info.DPPt ? p0 >> 15 : p0 & 1) == 1;
|
|
lead = max ? LeadRequired.PressureHustleSpirit : LeadRequired.PressureHustleSpiritFail;
|
|
yield return info.GetFrame(prev2, lead, p1, p1, prev2);
|
|
yield return info.GetFrame(prev2, lead | LeadRequired.UsesLevelCall, p2, p1, prev3);
|
|
|
|
// Keen Eye, Intimidate (Not compatible with Sweet Scent)
|
|
// -2 ESV
|
|
// -1 Level (Optional)
|
|
// 0 Level Adequate Check !(Random() % 2 == 1) rejects -- rand%2==1 is adequate
|
|
// 1 Nature
|
|
// Note: if this check fails, the encounter generation routine is aborted.
|
|
if (max) // same result as above, no need to recalculate
|
|
{
|
|
lead = LeadRequired.IntimidateKeenEye;
|
|
yield return info.GetFrame(prev2, lead, p1, p1, prev2);
|
|
yield return info.GetFrame(prev2, lead | LeadRequired.UsesLevelCall, p2, p1, prev3);
|
|
}
|
|
|
|
// Static or Magnet Pull
|
|
// -2 SlotProc (Random % 2 == 0)
|
|
// -1 ESV (select slot)
|
|
// 0 Level (Optional)
|
|
// 1 Nature
|
|
var force1 = (info.DPPt ? p1 >> 15 : p1 & 1) == 1;
|
|
lead = force1 ? LeadRequired.StaticMagnet : LeadRequired.StaticMagnetFail;
|
|
yield return info.GetFrame(prev2, lead, p0, p0, prev3);
|
|
|
|
var force2 = (info.DPPt ? p2 >> 15 : p2 & 1) == 1;
|
|
lead = (force2 ? LeadRequired.StaticMagnet : LeadRequired.StaticMagnetFail) | LeadRequired.UsesLevelCall;
|
|
yield return info.GetFrame(prev2, lead, p1, p0, prev3);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Filters the input <see cref="SeedInfo"/> according to a Nature Lock frame generation pattern.
|
|
/// </summary>
|
|
/// <param name="seeds">Seed Information for the frame</param>
|
|
/// <param name="pidiv">PIDIV Info for the frame</param>
|
|
/// <param name="info">Search Info for the frame</param>
|
|
/// <returns>Possible matches to the Nature Lock frame generation pattern</returns>
|
|
private static IEnumerable<Frame> FilterNatureSync(IEnumerable<SeedInfo> seeds, PIDIV pidiv, FrameGenerator info)
|
|
{
|
|
foreach (var seed in seeds)
|
|
{
|
|
var s = seed.Seed;
|
|
|
|
if (info.Safari3)
|
|
{
|
|
// successful pokeblock activation
|
|
bool result = IsValidPokeBlockNature(s, info.Nature, out uint blockSeed);
|
|
if (result)
|
|
yield return info.GetFrame(blockSeed, seed.Charm3 ? LeadRequired.CuteCharm : LeadRequired.None);
|
|
|
|
// if no pokeblocks present (or failed call), fall out of the safari specific code and generate via the other scenarios
|
|
}
|
|
|
|
var rand = s >> 16;
|
|
bool sync = info.AllowLeads && !seed.Charm3 && (info.DPPt ? rand >> 15 : rand & 1) == 0;
|
|
bool reg = (info.DPPt ? rand / 0xA3E : rand % 25) == info.Nature;
|
|
if (!sync && !reg) // doesn't generate nature frame
|
|
continue;
|
|
|
|
uint prev = pidiv.RNG.Prev(s);
|
|
if (info.AllowLeads && reg) // check for failed sync
|
|
{
|
|
var failsync = (info.DPPt ? prev >> 31 : (prev >> 16) & 1) != 1;
|
|
if (failsync)
|
|
yield return info.GetFrame(pidiv.RNG.Prev(prev), LeadRequired.SynchronizeFail);
|
|
}
|
|
if (sync)
|
|
yield return info.GetFrame(prev, LeadRequired.Synchronize);
|
|
if (reg)
|
|
{
|
|
if (seed.Charm3)
|
|
{
|
|
yield return info.GetFrame(prev, LeadRequired.CuteCharm);
|
|
}
|
|
else
|
|
{
|
|
if (info.Safari3)
|
|
prev = pidiv.RNG.Prev(prev); // wasted RNG call
|
|
yield return info.GetFrame(prev, LeadRequired.None);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
private static bool IsValidPokeBlockNature(uint seed, uint nature, out uint natureOrigin)
|
|
{
|
|
if (nature % 6 == 0) // neutral
|
|
{
|
|
natureOrigin = 0;
|
|
return false;
|
|
}
|
|
|
|
// unroll the RNG to a stack of seeds
|
|
var stack = new Stack<uint>();
|
|
for (uint i = 0; i < 25; i++)
|
|
{
|
|
for (uint j = 1 + i; j < 25; j++)
|
|
stack.Push(seed = RNG.LCRNG.Prev(seed));
|
|
}
|
|
|
|
natureOrigin = RNG.LCRNG.Prev(stack.Peek());
|
|
if (natureOrigin >> 16 % 100 >= 80) // failed proc
|
|
return false;
|
|
|
|
// init natures
|
|
uint[] natures = new uint[25];
|
|
for (uint i = 0; i < 25; i++)
|
|
natures[i] = i;
|
|
|
|
// shuffle nature list
|
|
for (uint i = 0; i < 25; i++)
|
|
{
|
|
for (uint j = 1 + i; j < 25; j++)
|
|
{
|
|
var s = stack.Pop();
|
|
if ((s >> 16 & 1) == 0)
|
|
continue; // only swap if 1
|
|
|
|
var temp = natures[i];
|
|
natures[i] = natures[j];
|
|
natures[j] = temp;
|
|
}
|
|
}
|
|
|
|
var likes = Pokeblock.GetLikedBlockFlavor(nature);
|
|
// best case scenario is a perfect flavored pokeblock for the nature.
|
|
// has liked flavor, and all other non-disliked flavors are present.
|
|
// is it possible to skip this step?
|
|
for (int i = 0; i < 25; i++)
|
|
{
|
|
var n = natures[i];
|
|
if (n == nature)
|
|
break;
|
|
|
|
var nl = Pokeblock.GetLikedBlockFlavor(natures[i]);
|
|
if (nl == likes) // next random nature likes the same block as the desired nature
|
|
return false; // current nature is chosen instead, fail!
|
|
}
|
|
// unroll once more to hit the level calc (origin with respect for beginning the nature calcs)
|
|
natureOrigin = RNG.LCRNG.Prev(natureOrigin);
|
|
return true;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Filters the input <see cref="SeedInfo"/> according to a Cute Charm frame generation pattern.
|
|
/// </summary>
|
|
/// <param name="seeds">Seed Information for the frame</param>
|
|
/// <param name="pidiv">PIDIV Info for the frame</param>
|
|
/// <param name="info">Search Info for the frame</param>
|
|
/// <returns>Possible matches to the Cute Charm frame generation pattern</returns>
|
|
private static IEnumerable<Frame> FilterCuteCharm(IEnumerable<SeedInfo> seeds, PIDIV pidiv, FrameGenerator info)
|
|
{
|
|
foreach (var seed in seeds)
|
|
{
|
|
var s = seed.Seed;
|
|
|
|
var rand = s >> 16;
|
|
var nature = info.DPPt ? rand / 0xA3E : rand % 25;
|
|
if (nature != info.Nature)
|
|
continue;
|
|
|
|
var prev = pidiv.RNG.Prev(s);
|
|
var proc = prev >> 16;
|
|
bool charmProc = (info.DPPt ? proc / 0x5556 : proc % 3) != 0; // 2/3 odds
|
|
if (!charmProc)
|
|
continue;
|
|
|
|
yield return info.GetFrame(prev, LeadRequired.CuteCharm);
|
|
}
|
|
}
|
|
}
|
|
}
|