// Append the vertex to the output container.
public override void HandleVertex(GeoLatLng pnt)
{
if (_pDest.Count == 0 || !pnt.Equals(_pDest[_pDest.Count - 1]))
{
_pDest.Add(pnt);
}
}
////////////////////////////////////////////////////////////////////////////
//--------------------------------- REVISIONS ------------------------------
// Date name Tracking # Description
// --------- ------------------- ------------- ----------------------
// 14JAN2009 James Shen Initial Creation
////////////////////////////////////////////////////////////////////////////
/**
* clip the a pline.
* @param input the pline to be clipped.
* @return the clipped pline.
*/
public ArrayList ClipPline(GeoLatLng[] input)
{
ArrayList clipped = new ArrayList();
GeoLatLng p, prev = null;
bool isInsidePrev = false;
clipped.Clear();
for (int i = 0; i < input.Length; i++)
{
p = input[i];
bool isInside = _rectBounds.Contains(p);
if (isInside)
{
if (!isInsidePrev && (((clipped.Count != 0) &&
(!prev.Equals(clipped[clipped.Count - 1]))) ||
((clipped.Count == 0 && (prev != null)))))
{
clipped.Add(prev);
}
clipped.Add(p);
}
else if (isInsidePrev)
{
clipped.Add(p);
}
else if (prev != null)
{
GeoLatLngBounds rect = new GeoLatLngBounds(Math.Min(p.X, prev.X),
Math.Min(p.Y, prev.Y),
Math.Max(p.X, prev.X) - Math.Min(p.X, prev.X),
Math.Max(p.Y, prev.Y) - Math.Min(p.Y, prev.Y));
if (rect.Intersects(_rectBounds))
{
ArrayList line1 = new ArrayList();
line1.Add(prev);
line1.Add(p);
ArrayList line2 = new ArrayList();
line2.Add(new GeoLatLng(_rectBounds.Y, _rectBounds.X));
line2.Add(new GeoLatLng(
(_rectBounds.Y + _rectBounds.Height),
(_rectBounds.X + _rectBounds.Width)));
ArrayList line3 = new ArrayList();
line3.Add(new GeoLatLng((_rectBounds.Y + _rectBounds.Height),
_rectBounds.X));
line3.Add(new GeoLatLng(
_rectBounds.Y,
(_rectBounds.X + _rectBounds.Width)));
if (IsLineInter(line1, line2) ||
IsLineInter(line1, line3))
{
clipped.Add(prev);
clipped.Add(p);
}
}
}
isInsidePrev = isInside;
prev = p;
}
return(clipped);
}