/// <summary>Closes the last path of this multipath with a line segment.</summary>
/// <remarks>
/// Closes the last path of this multipath with a line segment. The closing
/// segment is a segment that connects the last and the first points of the
/// path. This is a virtual segment. The first point is not duplicated to
/// close the path.
/// Call this method only for polylines. For polygons this method is
/// implicitly called for the Polygon class.
/// </remarks>
public virtual void ClosePathWithLine()
{
m_impl.ClosePathWithLine();
}
private void GeneralizePath(com.epl.geometry.MultiPathImpl mpsrc, int ipath, com.epl.geometry.MultiPathImpl mpdst, com.epl.geometry.Line lineHelper)
{
if (mpsrc.GetPathSize(ipath) < 2)
{
return;
}
int start = mpsrc.GetPathStart(ipath);
int end = mpsrc.GetPathEnd(ipath) - 1;
com.epl.geometry.AttributeStreamOfDbl xy = (com.epl.geometry.AttributeStreamOfDbl)mpsrc.GetAttributeStreamRef(com.epl.geometry.VertexDescription.Semantics.POSITION);
bool bClosed = mpsrc.IsClosedPath(ipath);
com.epl.geometry.AttributeStreamOfInt32 stack = new com.epl.geometry.AttributeStreamOfInt32(0);
stack.Reserve(mpsrc.GetPathSize(ipath) + 1);
com.epl.geometry.AttributeStreamOfInt32 resultStack = new com.epl.geometry.AttributeStreamOfInt32(0);
resultStack.Reserve(mpsrc.GetPathSize(ipath) + 1);
stack.Add(bClosed ? start : end);
stack.Add(start);
com.epl.geometry.Point2D pt = new com.epl.geometry.Point2D();
while (stack.Size() > 1)
{
int i1 = stack.GetLast();
stack.RemoveLast();
int i2 = stack.GetLast();
mpsrc.GetXY(i1, pt);
lineHelper.SetStartXY(pt);
mpsrc.GetXY(i2, pt);
lineHelper.SetEndXY(pt);
int mid = FindGreatestDistance(lineHelper, pt, xy, i1, i2, end);
if (mid >= 0)
{
stack.Add(mid);
stack.Add(i1);
}
else
{
resultStack.Add(i1);
}
}
if (!bClosed)
{
resultStack.Add(stack.Get(0));
}
int rs_size = resultStack.Size();
int path_size = mpsrc.GetPathSize(ipath);
if (rs_size == path_size && rs_size == stack.Size())
{
mpdst.AddPath(mpsrc, ipath, true);
}
else
{
if (resultStack.Size() > 0)
{
if (m_bRemoveDegenerateParts && resultStack.Size() <= 2)
{
if (bClosed || resultStack.Size() == 1)
{
return;
}
double d = com.epl.geometry.Point2D.Distance(mpsrc.GetXY(resultStack.Get(0)), mpsrc.GetXY(resultStack.Get(1)));
if (d <= m_maxDeviation)
{
return;
}
}
com.epl.geometry.Point point = new com.epl.geometry.Point();
for (int i = 0, n = resultStack.Size(); i < n; i++)
{
mpsrc.GetPointByVal(resultStack.Get(i), point);
if (i == 0)
{
mpdst.StartPath(point);
}
else
{
mpdst.LineTo(point);
}
}
if (bClosed)
{
for (int i_1 = resultStack.Size(); i_1 < 3; i_1++)
{
mpdst.LineTo(point);
}
mpdst.ClosePathWithLine();
}
}
}
}
