private void GetFirstAndLastReferenceLines(DicomImagePlane targetImagePlane, out ReferenceLine firstReferenceLine, out ReferenceLine lastReferenceLine)
{
firstReferenceLine = lastReferenceLine = null;
float firstReferenceImageZComponent = float.MaxValue;
float lastReferenceImageZComponent = float.MinValue;
foreach (DicomImagePlane parallelPlane in GetPlanesParallelToReferencePlane())
{
if (parallelPlane.PositionImagePlaneTopLeft.Z < firstReferenceImageZComponent)
{
ReferenceLine referenceLine = GetReferenceLine(parallelPlane, targetImagePlane);
if (referenceLine != null)
{
firstReferenceImageZComponent = parallelPlane.PositionImagePlaneTopLeft.Z;
firstReferenceLine = referenceLine;
}
}
if (parallelPlane.PositionImagePlaneTopLeft.Z >= lastReferenceImageZComponent)
{
ReferenceLine referenceLine = GetReferenceLine(parallelPlane, targetImagePlane);
if (referenceLine != null)
{
lastReferenceImageZComponent = parallelPlane.PositionImagePlaneTopLeft.Z;
lastReferenceLine = referenceLine;
}
}
}
}
private IEnumerable <ReferenceLine> GetAllReferenceLines(DicomImagePlane targetImagePlane)
{
ReferenceLine firstReferenceLine = null;
ReferenceLine lastReferenceLine = null;
GetFirstAndLastReferenceLines(targetImagePlane, out firstReferenceLine, out lastReferenceLine);
if (firstReferenceLine != null)
{
yield return(firstReferenceLine);
}
if (lastReferenceLine != null)
{
yield return(lastReferenceLine);
}
ReferenceLine currentReferenceLine = GetReferenceLine(_currentReferenceImagePlane, targetImagePlane);
if (currentReferenceLine != null)
{
yield return(currentReferenceLine);
}
}
