ILinearRing GetLinearRing(Ring r)
{
// Output an approximation for any circular arcs
ILength curvetol = new Length(0.1);
IPosition[] outline = r.GetOutline(curvetol);
DirectPositionCollection dpc = GetDirectPositions(outline);
return(m_Factory.CreateLinearRing(dpc));
}
DirectPositionCollection GetDirectPositions(IPosition[] positions)
{
DirectPositionCollection dpc = new DirectPositionCollection();
foreach (IPosition p in positions)
{
IDirectPosition xy = m_Factory.CreatePositionXY(p.X, p.Y);
dpc.Add(xy);
}
return(dpc);
}
IRing GetRing(Ring r)
{
CurveSegmentCollection csc = new CurveSegmentCollection();
foreach (IDivider d in r.Edge)
{
LineGeometry line = d.LineGeometry;
ICurveSegmentAbstract cseg = null;
if (line is SectionGeometry)
{
SectionGeometry section = (line as SectionGeometry);
line = section.Make();
}
if (line is MultiSegmentGeometry)
{
MultiSegmentGeometry mseg = (line as MultiSegmentGeometry);
DirectPositionCollection dpc = GetDirectPositions(mseg.Data);
cseg = m_Factory.CreateLineStringSegment(dpc);
}
else if (line is SegmentGeometry)
{
SegmentGeometry segment = (line as SegmentGeometry);
DirectPositionCollection dpc = GetDirectPositions(new IPosition[] { segment.Start, segment.End });
cseg = m_Factory.CreateLineStringSegment(dpc);
}
else if (line is ArcGeometry)
{
ArcGeometry arc = (line as ArcGeometry);
IPosition mp = arc.GetMidPosition();
IDirectPosition bc = m_Factory.CreatePositionXY(arc.BC.X, arc.BC.Y);
IDirectPosition mid = m_Factory.CreatePositionXY(mp.X, mp.Y);
IDirectPosition ec = m_Factory.CreatePositionXY(arc.EC.X, arc.EC.Y);
cseg = m_Factory.CreateCircularArcSegment(bc, mid, ec);
}
else
{
throw new NotSupportedException("Unknown line type: " + line.GetType().Name);
}
csc.Add(cseg);
}
return(m_Factory.CreateRing(csc));
}
DirectPositionCollection GetDirectPositions(IPosition[] positions)
{
DirectPositionCollection dpc = new DirectPositionCollection();
foreach (IPosition p in positions)
{
IDirectPosition xy = m_Factory.CreatePositionXY(p.X, p.Y);
dpc.Add(xy);
}
return dpc;
}
ILineString GetLineString(IPosition[] positions)
{
DirectPositionCollection dpc = GetDirectPositions(positions);
return(m_Factory.CreateLineString(dpc));
}
