/// <summary>
/// Attempts to move existing Future syncAmount positions further.
/// </summary>
/// <returns>Updated future</returns>
public virtual int SyncFuture(int syncAmount, IRNG rng, int offset = 0)
{
var state = rng.SaveState();
//Check if cached future is still good to advance without searching again.
if (hasCachedFuture && CachedFuture - syncAmount >= 0)
{
CachedState = state;
CachedOffset = offset;
return(CachedFuture -= syncAmount);
}
else
{
hasCachedFuture = false;
return(GetFuture(rng, offset));
}
}
/// <summary>
/// Determines number of positions to advance RNG to get DesiredResult
/// </summary>
/// <returns>Number of positions to advance RNG, or -1 if desired result could not be found in search depth.</returns>
public virtual int GetFuture(IRNG rng, int offset = 0)
{
var state = rng.SaveState();
if (hasCachedFuture && offset == CachedOffset && state.mti == CachedState.mti && state.mt.SequenceEqual(CachedState.mt))
{
return(CachedFuture);
}
hasCachedFuture = true;
CachedState = state;
CachedOffset = offset;
for (int i = 0; i < SearchDepth; i++)
{
if (GenerateAndCheckResult(rng, i + offset))
{
return(CachedFuture = i);
}
}
return(CachedFuture = -1);
}