async Task TestDirection(Logger logger, double[] vectorFromThisToDestination, int iteration = 0)
{
// are all vectors along directionVector?
bool neighbor_along_destinationVector_exists = false;
foreach (var neighbor in ConnectedNeighborsCanBeUsedForNewRequests)
{
var thisRegIdVector = RegistrationIdDistance.GetVectorValues(CryptoLibrary, this.Configuration.LocalPeerRegistrationId, vectorFromThisToDestination.Length);
var neighborRegIdVector = RegistrationIdDistance.GetVectorValues(CryptoLibrary, neighbor.RemoteRegistrationId, vectorFromThisToDestination.Length);
var vectorFromLocalPeerToNeighbor = new double[thisRegIdVector.Length];
for (int i = 0; i < vectorFromLocalPeerToNeighbor.Length; i++)
{
vectorFromLocalPeerToNeighbor[i] = RegistrationIdDistance.GetDifferenceInLoopedRegistrationIdSpace(thisRegIdVector[i], neighborRegIdVector[i]);
}
double multProduct = 0;
for (int dimensionI = 0; dimensionI < vectorFromThisToDestination.Length; dimensionI++)
{
multProduct += vectorFromLocalPeerToNeighbor[dimensionI] * vectorFromThisToDestination[dimensionI];
}
if (multProduct > 0)
{
neighbor_along_destinationVector_exists = true;
break;
}
}
if (neighbor_along_destinationVector_exists == false)
{
if (iteration < 8)
{
if (ConnectedNeighbors.Count < _configuration.AbsoluteMaxNumberOfNeighbors)
{
logger.WriteToLog_higherLevelDetail_EmitListOfPeers($"no neighbors to destination {MiscProcedures.VectorToString(vectorFromThisToDestination)}, sending REGISTER request... iteration={iteration}", this);
// try to fix the pain: connect to neighbors at empty direction
await ConnectToNewNeighborAsync(Engine.DateTimeNowUtc, true, vectorFromThisToDestination);
if (iteration >= 2)
{
await Engine.EngineThreadQueue.WaitAsync(TimeSpan.FromSeconds(10), "fixing empty direction 1237");
}
await TestDirection(logger, vectorFromThisToDestination, iteration + 1);
}
else
{
logger.WriteToLog_lightPain_EmitListOfPeers($"no neighbors to destination {MiscProcedures.VectorToString(vectorFromThisToDestination)} after {iteration} iterations. {ConnectedNeighbors.Count} connected neighbors already", this);
}
}
else
{ // pain is not fixed
logger.WriteToLog_lightPain_EmitListOfPeers($"no neighbors to destination {MiscProcedures.VectorToString(vectorFromThisToDestination)} after {iteration} iterations. {ConnectedNeighbors.Count} connected neighbors", this);
}
}
}
public static double[] GetDifferenceVector(RegistrationId from, RegistrationId to, ICryptoLibrary cryptoLibrary, int numberOfDimensions)
{
var fromRegIdVector = RegistrationIdDistance.GetVectorValues(cryptoLibrary, from, numberOfDimensions);
var destinationRegIdVector = RegistrationIdDistance.GetVectorValues(cryptoLibrary, to, numberOfDimensions);
var diff = new double[fromRegIdVector.Length];
for (int i = 0; i < diff.Length; i++)
{
diff[i] = RegistrationIdDistance.GetDifferenceInLoopedRegistrationIdSpace(fromRegIdVector[i], destinationRegIdVector[i]);
}
return(diff);
}
///<param name="considerValueOfUniqueSectors">false when registering via EP</param>
/// <returns>component of mutual value</returns>
public float GetValue(float[] neighborVector, bool neighborIsAlreadyConnected, bool considerValueOfUniqueSectors)
{
float distanceFromLocalPeerToNeighbor = 0;
var vectorFromLocalPeerToNeighbor = new float[NumberOfDimensions];
for (int i = 0; i < neighborVector.Length; i++)
{
var vectorFromLocalPeerToNeighbor_i = RegistrationIdDistance.GetDifferenceInLoopedRegistrationIdSpace(_localPeerVector[i], neighborVector[i]);
vectorFromLocalPeerToNeighbor[i] = vectorFromLocalPeerToNeighbor_i;
distanceFromLocalPeerToNeighbor += vectorFromLocalPeerToNeighbor_i * vectorFromLocalPeerToNeighbor_i;
}
distanceFromLocalPeerToNeighbor = (float)Math.Sqrt(distanceFromLocalPeerToNeighbor);
float r = -distanceFromLocalPeerToNeighbor;
if (considerValueOfUniqueSectors)
{
var sectorIndex = _vsic.GetSectorIndex(vectorFromLocalPeerToNeighbor);
var neighborsCountInSector = _currentNeighborsCountPerSectors[sectorIndex];
if (neighborIsAlreadyConnected)
{
if (neighborsCountInSector == 1)
{
r += EmptySectorOccupationValue; // this neighbor is the only one in the sector
}
// else if (neighborsCountInSector == 2) r += 1.0f; // TODO questionable heuristics really 1 or another value?
}
else
{
if (neighborsCountInSector == 0)
{
r += EmptySectorOccupationValue;
}
// else if (neighborsCountInSector == 1) r += 1.0f; // TODO questionable heuristics really 1 or another value?
}
}
return(r);
}
public P2pConnectionValueCalculator(float[] localPeerVector, IEnumerable <float[]> currentNeighborsVectors, Action <string> wtl)
{
_localPeerVector = localPeerVector;
if (!_vsics.TryGetValue(NumberOfDimensions, out _vsic))
{
_vsic = new VectorSectorIndexCalculator(NumberOfDimensions);
_vsics.Add(NumberOfDimensions, _vsic);
}
_currentNeighborsCountPerSectors = new int[_vsic.IndexesCount];
int neighborIndex = 0;
var vectorsFromLocalPeerToNeighbors = new List <float[]>();
foreach (var neighborVector in currentNeighborsVectors)
{
var vectorFromLocalPeerToNeighbor = new float[NumberOfDimensions];
float vectorFromLocalPeerToNeighbor_length = 0;
for (int i = 0; i < NumberOfDimensions; i++)
{
var vectorFromLocalPeerToNeighbor_i = RegistrationIdDistance.GetDifferenceInLoopedRegistrationIdSpace(_localPeerVector[i], neighborVector[i]);
vectorFromLocalPeerToNeighbor[i] = vectorFromLocalPeerToNeighbor_i;
vectorFromLocalPeerToNeighbor_length += vectorFromLocalPeerToNeighbor_i * vectorFromLocalPeerToNeighbor_i;
}
vectorFromLocalPeerToNeighbor_length = (float)Math.Sqrt(vectorFromLocalPeerToNeighbor_length);
var sectorIndex = _vsic.GetSectorIndex(vectorFromLocalPeerToNeighbor);
_currentNeighborsCountPerSectors[sectorIndex]++;
for (int i = 0; i < NumberOfDimensions; i++)
{
vectorFromLocalPeerToNeighbor[i] /= vectorFromLocalPeerToNeighbor_length;
}
wtl?.Invoke($"neighbor#{neighborIndex} localToNeighbor=[{String.Join(";", vectorFromLocalPeerToNeighbor.Select(x => x.ToString()))}] sectorIndex={sectorIndex}");
vectorsFromLocalPeerToNeighbors.Add(vectorFromLocalPeerToNeighbor);
neighborIndex++;
}
_emptyDirectionVector = null;
//_emptyDirectionVector = FindEmptyDirection(NumberOfDimensions, _vsic, vectorsFromLocalPeerToNeighbors);
//if (_emptyDirectionVector != null)
//{
// _thereIsNeighborAlongEmptyDirectionVector = false;
// neighborIndex = 0;
// foreach (var vectorFromLocalPeerToNeighbor in vectorsFromLocalPeerToNeighbors)
// {
// float mulResult = 0;
// for (int i = 0; i < NumberOfDimensions; i++)
// mulResult += vectorFromLocalPeerToNeighbor[i] * _emptyDirectionVector[i];
// wtl?.Invoke($"neighbor#{neighborIndex}=[{String.Join(";", vectorFromLocalPeerToNeighbor.Select(x => x.ToString()))}]:mulResult={mulResult};");
// if (mulResult > 0)
// {
// _thereIsNeighborAlongEmptyDirectionVector = true;
// break;
// }
// neighborIndex++;
// }
//}
if (wtl != null)
{
for (int sectorIndex = 0; sectorIndex < _vsic.IndexesCount; sectorIndex++)
{
wtl.Invoke($"sector{sectorIndex} simplexVector=[{String.Join(";", _vsic.GetSimplexVector(sectorIndex).Select(x => x.ToString()))}]");
}
if (_emptyDirectionVector != null)
{
wtl.Invoke($"emptyDirectionVector=[{String.Join(";", _emptyDirectionVector.Select(x => x.ToString()))}]");
}
else
{
wtl.Invoke($"emptyDirectionVector=null");
}
}
}