/// <summary>
/// Generates a list of frames the <see cref="current"/> lock data can be generated at.
/// </summary>
/// <param name="ctr">Starting frame for the traversal.</param>
/// <param name="current">Current lock criteria to satisfy. Used to find valid <see cref="SeedFrame"/> results to yield.</param>
/// <param name="prior">Prior lock criteria. Used for determining when the traversal stops.</param>
/// <returns>List of possible locks for the provided input.</returns>
private IEnumerable <SeedFrame> GetPossibleLocks(int ctr, NPCLock current, NPCLock?prior)
{
if (prior?.Shadow != false)
{
return(GetSingleLock(ctr, current));
}
return(GetAllLocks(ctr, current, (NPCLock)prior));
}
/// <summary>
/// Generates <see cref="SeedFrame"/> nodes until the traversal is ended by an interrupt frame that matches the <see cref="prior"/>.
/// </summary>
/// <param name="ctr">Starting frame for the traversal.</param>
/// <param name="current">Current lock criteria to satisfy. Used to find valid <see cref="SeedFrame"/> results to yield.</param>
/// <param name="prior">Prior lock criteria. Used for determining when the traversal stops.</param>
/// <returns>List of possible locks for the provided input.</returns>
/// <remarks>
/// An "interrupt" signals the end of the traversal.
/// Any <see cref="SeedFrame"/> afterwards (when generated forward from the CPU Trainer) will use the interrupt rather than the previous <see cref="SeedFrame"/> that was found for the <see cref="prior"/> lock.
/// </remarks>
private IEnumerable <SeedFrame> GetAllLocks(int ctr, NPCLock current, NPCLock prior)
{
// Since the prior(next) lock is generated 7+2*n frames after, the worst case break is 7 frames after the PID.
// Continue reversing until a sequential generation case is found.
int start = ctr;
// Track if we ever require the CPU Trainer Shiny Value to be a value for a shiny skip.
// We need to un-set this flag if future frames don't pan out.
bool forcedOT = false;
while (true)
{
int p7 = ctr - 7;
if (p7 > start)
{
// check for interrupting cpu team cases
var upper = Cache[p7 + 1];
var lower = Cache[p7];
uint cid = (upper << 16) | lower;
var sv = (upper ^ lower) >> 3;
if (sv == TSV) // XD shiny checks all opponent PKM, even non-shadow.
{
// This interrupt is ignored! The result is shiny.
}
else if (prior.MatchesLock(cid)) // lock matched cpu mon
{
if (RCSV != NOT_FORCED) // CPU shiny value is required for a previous lock
{
if (sv != RCSV)
{
if (forcedOT) // current call to this method had forced the OT; clear the forced OT before breaking.
{
RCSV = NOT_FORCED;
}
yield break; // Since we can't skip this interrupt, we're done.
}
}
else // No CPU shiny value forced yet. Lets try to skip this lock by requiring the eventual OT to get this shiny.
{
RCSV = (int)sv;
forcedOT = true;
// don't break
}
}
}
uint pid = (Cache[ctr + 1] << 16) | Cache[ctr];
if (current.MatchesLock(pid))
{
yield return(new SeedFrame(pid, ctr + current.FramesConsumed));
}
ctr += 2;
}
}
/// <summary>
/// Returns a single <see cref="SeedFrame"/> as the <see cref="current"/> lock must match precisely.
/// </summary>
/// <param name="ctr">Starting frame for the traversal.</param>
/// <param name="current">Current lock criteria to satisfy. Used to find valid <see cref="SeedFrame"/> results to yield.</param>
private IEnumerable <SeedFrame> GetSingleLock(int ctr, NPCLock current)
{
uint pid = (Cache[ctr + 1] << 16) | Cache[ctr];
if (current.MatchesLock(pid))
{
yield return(new SeedFrame(pid, ctr + current.FramesConsumed));
}
else
{
yield break;
}
// Reaching here means the single lock didn't cut it. Maybe the frame before it was an anti-shiny reroll?
// Track if we ever require the CPU Trainer Shiny Value to be a value for a shiny skip.
// We need to un-set this flag if future frames don't pan out.
bool forcedOT = false;
int start = 2;
while (true)
{
var upper = Cache[start + 1];
var lower = Cache[start];
// uint cid = upper << 16 | lower;
var sv = (upper ^ lower) >> 3;
if (sv == TSV) // XD shiny checks all opponent PKM, even non-shadow.
{
// Anti-shiny rerolled! This is a possible frame.
}
else if (RCSV != NOT_FORCED) // CPU shiny value is required for a previous lock
{
if (sv == RCSV)
{
// No CPU shiny value forced yet. Lets try to skip this lock by requiring the eventual OT to get this shiny.
RCSV = (int)sv;
forcedOT = true;
continue; // don't break
}
if (forcedOT) // current call to this method had forced the OT; clear the forced OT before breaking.
{
RCSV = NOT_FORCED;
}
yield break; // Since we can't skip this interrupt, we're done.
}
// Yield the final rerolled pid instead of the bad anti-shiny (metadata/validation).
yield return(new SeedFrame(pid, start + current.FramesConsumed));
start += 2;
}
}