/// <summary>
/// Writes a Geometry to the given binary wirter.
/// </summary>
/// <param name="geometry">The geometry to write.</param>
/// <param name="file">The file stream to write to.</param>
/// <param name="geometryFactory">The geometry factory to use.</param>
public override void Write(Geometry geometry, System.IO.BinaryWriter file, GeometryFactory geometryFactory)
{
if (geometry.IsValid()==false)
{
Trace.WriteLine("Invalid polygon being written.");
}
GeometryCollection multi;
if(geometry is GeometryCollection)
{
multi = (GeometryCollection) geometry;
}
else
{
GeometryFactory gf = new GeometryFactory(geometry.PrecisionModel, geometry.GetSRID());
//multi = new MultiPolygon(new Polygon[]{(Polygon) geometry}, geometry.PrecisionModel, geometry.GetSRID());
multi = gf.CreateMultiPolygon( new Polygon[]{(Polygon) geometry} );
}
//file.setLittleEndianMode(true);
file.Write(int.Parse(Enum.Format(typeof(ShapeType),this.ShapeType,"d")));
Envelope box = multi.GetEnvelopeInternal();
Envelope bounds = ShapeHandler.GetEnvelopeExternal(geometryFactory.PrecisionModel, box);
file.Write(bounds.MinX);
file.Write(bounds.MinY);
file.Write(bounds.MaxX);
file.Write(bounds.MaxY);
int numParts = GetNumParts(multi);
int numPoints = multi.GetNumPoints();
file.Write(numParts);
file.Write(numPoints);
// write the offsets to the points
int offset=0;
for (int part = 0; part < multi.Count; part++)
{
// offset to the shell points
Polygon polygon = (Polygon)multi[part];
file.Write(offset);
offset = offset + polygon.Shell.GetNumPoints();
// offstes to the holes
foreach (LinearRing ring in polygon.Holes)
{
file.Write(offset);
offset = offset + ring.GetNumPoints();
}
}
// write the points
for (int part = 0; part < multi.Count; part++)
{
Polygon poly = (Polygon)multi[part];
Coordinates points = poly.Shell.GetCoordinates();
if (_cga.IsCCW(points)==true)
{
//points = points.ReverseCoordinateOrder();
}
WriteCoords(points, file, geometryFactory);
foreach(LinearRing ring in poly.Holes)
{
Coordinates points2 = ring.GetCoordinates();
if (_cga.IsCCW(points2)==false)
{
//points2 = points2.ReverseCoordinateOrder();
}
WriteCoords(points2, file, geometryFactory);
}
}
}