/// <summary>
/// add a line segment
/// initialize it before adding
/// </summary>
/// <param name="l"></param>
public void Add(LineSegment l)
{
// assigne data term
//l.Initialize(_srcImage, _gvfU, _gvfV, _gvfMagnitude);
//l.Index = _n;
// add line segment
_configuration.Add(l);
_n++;
}
/// <summary>
/// is the line segment part of l?
/// </summary>
/// <param name="l"></param>
/// <returns></returns>
public bool IsPartOf(LineSegment l)
{
if (_pointList.Count > l.PointList.Count)
return false;
foreach (PZPoint p in _pointList)
{
bool pIsPart = false;
foreach (PZPoint q in l.PointList)
{
if (p.EqualTo(q))
{
pIsPart = true;
break;
}
}
if (!pIsPart)
{
return false;
}
}
return true;
}
/// <summary>
/// merge the current line segment to the other, end to end
/// only merge point list, so that the merged line segment needs Initialize()
/// connections are copied.
/// </summary>
/// <returns></returns>
public LineSegment MergeTo(LineSegment l)
{
LineSegment newl = new LineSegment();
// this is a, and input (l) is b
int aLength = this.Ls;
int bLength = l.Ls;
int newLength = aLength + bLength - 1;
int[] pointIndex = new int[newLength];
#region find start and end points
// find start and end point
PZPoint aStart = _startPoint;
PZPoint aEnd = _endPoint;
PZPoint bStart = l.StartPoint;
PZPoint bEnd = l.EndPoint;
if (aStart.Equals(bStart))
{
// aEnd -> aStart(bStart) -> bEnd
for (int i = 0; i < aLength; i++)
pointIndex[i] = aLength - i - 1;
for (int i = 1; i < bLength; i++)
pointIndex[i + aLength - 1] = i;
}
else if (aStart.Equals(bEnd))
{
// aEnd -> aStart(bEnd) -> bStart
for (int i = 0; i < aLength; i++)
pointIndex[i] = aLength - i - 1;
for (int i = 1; i < bLength; i++)
pointIndex[i + aLength - 1] = bLength - i - 1;
}
else if (aEnd.Equals(bStart))
{
// aStart -> aEnd(bStart) -> bEnd
for (int i = 0; i < aLength; i++)
pointIndex[i] = i;
for (int i = 1; i < bLength; i++)
pointIndex[i + aLength - 1] = i;
}
else
{
// aStart- -> aEnd(bEnd) -> bStart
for (int i = 0; i < aLength; i++)
pointIndex[i] = i;
for (int i = 1; i < bLength; i++)
pointIndex[i + aLength - 1] = bLength - i - 1;
}
#endregion
// generate the new line segment
newl.Ls = newLength;
// a -> b
newl.StartPoint = new PZPoint(_pointList[pointIndex[0]]);
newl.EndPoint = new PZPoint(l.PointList[pointIndex[newLength - 1]]);
int indexCount = 0;
for (int i = 0; i < aLength; i++)
{
newl.PointList.Add(_pointList[pointIndex[indexCount]]);
indexCount++;
}
for (int i = 1; i < bLength; i++)
{
newl.PointList.Add(l.PointList[pointIndex[indexCount]]);
indexCount++;
}
return newl;
}
/// <summary>
/// is the line segment connected with l?
/// </summary>
/// <param name="l"></param>
/// <returns></returns>
public bool IsConnectedWith(LineSegment l)
{
bool isConnected = true;
if ((_startPoint.EqualTo(l._startPoint) && _endPoint.EqualTo(l._endPoint))
|| (_startPoint.EqualTo(l._endPoint) && _endPoint.EqualTo(l._startPoint)))
// a loop
isConnected = false;
else
{
if (_startPoint.EqualTo(l._startPoint))
{
_startPointConnectionList.Add(l);
_startPointConnectionTypeList.Add(ConnectionPointType.Start);
}
else if (_startPoint.EqualTo(l._endPoint))
{
_startPointConnectionList.Add(l);
_startPointConnectionTypeList.Add(ConnectionPointType.End);
}
else if (_endPoint.EqualTo(l._startPoint))
{
_endPointConnectionList.Add(l);
_endPointConnectionTypeList.Add(ConnectionPointType.Start);
}
else if (_endPoint.EqualTo(l._endPoint))
{
_endPointConnectionList.Add(l);
_endPointConnectionTypeList.Add(ConnectionPointType.End);
}
else
isConnected = false;
}
return isConnected;
}
