/// <summary>
/// Find nearest points at two sequence.
/// </summary>
/// <param name="firstSequence">First points sequence.</param>
/// <param name="secondSequence">Second points sequence.</param>
/// <returns><see cref="NearestPointsEventArgs"/>.</returns>
private NearestPointsEventArgs FindNearestPoint(IEnumerable <IDepthPointSource> firstSequence, IEnumerable <IDepthPointSource> secondSequence)
{
var uniqueBasePoints = firstSequence.GetUniqueDepthPoints();
var uniqueAdjustablePoints = secondSequence.GetUniqueDepthPoints();
var minDistance = double.MaxValue;
NearestPointsEventArgs minDistncePointsInfo = null;
Parallel.ForEach(uniqueBasePoints,
//create local Points info
() => new NearestPointsEventArgs()
{
Distance = double.MaxValue
},
//each thread work
(uniqueBasePoint, loopState, singleThreadPointInfo) =>
{
//save first point
singleThreadPointInfo.FirstPoint = uniqueBasePoint;
foreach (var uniqueAdjustablePoint in uniqueAdjustablePoints)
{
var dim = CoordinatePoint.GetDistanceBetweenPointsOnAnEllipsoid(uniqueBasePoint.Point, uniqueAdjustablePoint.Point).GetMeters();
if (dim < singleThreadPointInfo.Distance)
{
singleThreadPointInfo.SecondPoint = uniqueAdjustablePoint;
singleThreadPointInfo.Distance = dim;
}
//if we found two points with distance less 0.1m between, then stop calc.
if (Math.Abs(singleThreadPointInfo.Distance) < 0.1d)
{
loopState.Stop();
}
}
return(singleThreadPointInfo);
},
//composition
pointInfo =>
{
lock (_syncRoot)
{
if (pointInfo.Distance < minDistance)
{
minDistance = pointInfo.Distance;
minDistncePointsInfo = pointInfo;
}
}
}
);
//foreach (var uniqueBasePoint in uniqueBasePoints)
//{
// foreach (var uniqueAdjustablePoint in uniqueAdjustablePoints)
// {
// var dim = CoordinatePoint.DistanceBetweenPoints(uniqueBasePoint.Point, uniqueAdjustablePoint.Point);
// if (dim < distance)
// {
// distance = dim;
// points = new Tuple<IDepthPointSource, IDepthPointSource>(uniqueBasePoint, uniqueAdjustablePoint);
// }
// }
//}
OnNearestPointFound(minDistncePointsInfo);
return(minDistncePointsInfo);
}
protected virtual void OnNearestPointFound(NearestPointsEventArgs e)
{
NearestPointsFound?.Invoke(this, e);
}
