/// <summary>
/// Merges the segments at the specified indices.
/// </summary>
/// <param name="firstRowIndex">The first row index.</param>
/// <param name="firstColumnIndex">The first column index.</param>
/// <param name="secondRowIndex">The second row index.</param>
/// <param name="secondColumnIndex">The second column index.</param>
/// <exception cref="System.ArgumentOutOfRangeException">
/// The first row index is less than 0.
/// or
/// The first row index is equal to or greater than the number of rows.
/// or
/// The first column index is less than 0.
/// or
/// The first column index is equal to or greater than the number of columns.
/// or
/// The second row index is less than 0.
/// or
/// The second row index is equal to or greater than the number of rows.
/// or
/// The second column index is less than 0.
/// or
/// The second column index is equal to or greater than the number of columns.
/// </exception>
public virtual void MergeSegments(Int32 firstRowIndex, Int32 firstColumnIndex, Int32 secondRowIndex, Int32 secondColumnIndex)
{
if (firstRowIndex < 0)
{
throw new ArgumentOutOfRangeException("firstRowIndex", "The first row index is less than 0.");
}
if (firstRowIndex >= Raster.NumberOfRows)
{
throw new ArgumentOutOfRangeException("firstRowIndex", "The first row index is equal to or greater than the number of rows.");
}
if (firstColumnIndex < 0)
{
throw new ArgumentOutOfRangeException("firstColumnIndex", "The first column index is less than 0.");
}
if (firstColumnIndex >= Raster.NumberOfColumns)
{
throw new ArgumentOutOfRangeException("firstColumnIndex", "The first column index is equal to or greater than the number of columns.");
}
if (secondRowIndex < 0)
{
throw new ArgumentOutOfRangeException("secondRowIndex", "The second row index is less than 0.");
}
if (secondRowIndex >= Raster.NumberOfRows)
{
throw new ArgumentOutOfRangeException("secondRowIndex", "The second row index is equal to or greater than the number of rows.");
}
if (secondColumnIndex < 0)
{
throw new ArgumentOutOfRangeException("secondColumnIndex", "The second column index is less than 0.");
}
if (secondColumnIndex >= Raster.NumberOfColumns)
{
throw new ArgumentOutOfRangeException("secondColumnIndex", "The second column index is equal to or greater than the number of columns.");
}
// query the sets
Int32 firstIndex = firstRowIndex * Raster.NumberOfColumns + firstColumnIndex;
Int32 secondIndex = secondRowIndex * Raster.NumberOfColumns + secondColumnIndex;
if (firstIndex == secondIndex)
{
return;
}
// apply merge on the available set
if (!_indexToSegmentDictionary.ContainsKey(firstIndex))
{
if (!_indexToSegmentDictionary.ContainsKey(secondIndex))
{
Segment segment = new Segment(Raster.GetFloatValues(firstRowIndex, firstColumnIndex), Statistics);
segment.AddFloatValues(Raster.GetFloatValues(secondRowIndex, secondColumnIndex));
_indexToSegmentDictionary.Add(firstIndex, segment);
_indexToSegmentDictionary.Add(secondIndex, segment);
_segmentToIndexDictionary.Add(segment, new List <Int32> {
firstIndex, secondIndex
});
Count--;
}
else
{
ApplyMergeSegments(_indexToSegmentDictionary[secondIndex], firstIndex);
}
}
else if (!_indexToSegmentDictionary.ContainsKey(secondIndex))
{
ApplyMergeSegments(_indexToSegmentDictionary[firstIndex], secondIndex);
}
else // or merge the sets
{
Segment firstSegment = _indexToSegmentDictionary[firstIndex];
Segment secondSegment = _indexToSegmentDictionary[secondIndex];
if (firstSegment == secondSegment)
{
return;
}
if (firstSegment.Count > secondSegment.Count)
{
ApplyMergeSegments(firstSegment, secondSegment);
}
else
{
ApplyMergeSegments(secondSegment, firstSegment);
}
}
}
/// <summary>
/// Determines whether the collection contains the specified segment.
/// </summary>
/// <param name="segment">The segment.</param>
/// <returns><c>true</c> if the collection contains the segment; otherwise <c>false</c>.</returns>
public virtual Boolean Contains(Segment segment)
{
return(_segmentToIndexDictionary.ContainsKey(segment));
}