private static int SortByWeight(Segment a, Segment b)
{
if (a == null)
{
if (b == null)
return 0;
return 1;
}
if (b == null)
{
return -1;
}
if (a.Weight == b.Weight)
return 0;
if (a.Weight > b.Weight)
return -1;
else
return 1;
}
public Segment Next()
{
if (!HasNext())
return null;
int index = 0;
Segment seg = new Segment(polys);
TtPoint prev = points[index];
index++;
seg.Add(prev);
bool finished = false;
bool travStarted = false;
bool startTypeFound = (prev.IsGpsType() || (prev.op == OpType.Quondam &&
((QuondamPoint)prev).ParentPoint.IsGpsType()));
bool SavePrev = false;
TtPoint current;
string currentPolygon = prev.PolyCN;
if (index == points.Count)
points.Remove(prev);
while (index < points.Count && !finished)
{
current = points[index];
if (currentPolygon != current.PolyCN)
{
finished = true;
points.Remove(prev);
continue;
}
OpType tmpOp = current.op;
TtPoint tmpQp = null;
while (tmpOp == OpType.Quondam)
{
if (tmpQp == null)
tmpQp = ((QuondamPoint)current).ParentPoint;
else
tmpQp = ((QuondamPoint)tmpQp).ParentPoint;
tmpOp = tmpQp.op;
}
switch (tmpOp)
{
case OpType.GPS:
case OpType.WayPoint:
case OpType.Walk:
case OpType.Take5:
{
if (seg.Count == 1)
{
if (startTypeFound) //Already have a point (and only 1), Segment is finished
{
finished = true;
}
else //left over trav point from a sideshot
{
seg = new Segment(polys);
seg.Add(current);
startTypeFound = true;
}
}
else if (travStarted) //Or we are at the closing end of a traverse
{
finished = true;
seg.Add(current);
}
else
{
throw new Exception("2nd GPS type without trav start");
}
points.Remove(prev);
index--;
prev = current;
break;
}
case OpType.Traverse:
{
if ( prev.op == OpType.Traverse ||
prev.op == OpType.Quondam && ((QuondamPoint)prev).ParentOp == OpType.Traverse)
{
//finished = true;
seg.Add(current);
points.Remove(prev);
}
else
{
seg.Add(current);
if (startTypeFound)
travStarted = true;
if (!SavePrev)
{
if (points.Count == 1)
points.Remove(current);
points.Remove(prev);
}
else
{
SavePrev = false;
index++;
}
}
prev = current;
break;
}
case OpType.SideShot:
{
if (seg.Count == 1) //Only the parent point for this sideshot so far
{
seg.Add(current);
points.Remove(current); // don't remove the parent point, may be needed again
finished = true;
}
else // skip this point
{
SavePrev = true;
index++;
}
break;
}
}
}
return seg;
}
public void Add(Segment s)
{
_list.Add(s);
_sorted = false;
}