public static GeometryOffsets BuildGeometry(FlatBufferBuilder builder, IGeometry geometry, GeometryType geometryType, byte dimensions)
{
var go = new GeometryOffsets();
go.type = geometryType;
if (geometry == null)
{
return(go);
}
if (geometryType == GeometryType.MultiLineString)
{
uint end = 0;
MultiLineString mls = (MultiLineString)geometry;
if (mls.NumGeometries > 1)
{
go.ends = new uint[mls.NumGeometries];
for (int i = 0; i < mls.NumGeometries; i++)
{
go.ends[i] = end += (uint)mls.Geometries[i].NumPoints;
}
}
}
else if (geometryType == GeometryType.Polygon)
{
go.ends = CreateEnds(geometry as IPolygon, dimensions);
}
else if (geometryType == GeometryType.MultiPolygon)
{
MultiPolygon mp = (MultiPolygon)geometry;
int numGeometries = mp.NumGeometries;
GeometryOffsets[] gos = new GeometryOffsets[numGeometries];
for (int i = 0; i < numGeometries; i++)
{
Polygon p = (Polygon)mp.Geometries[i];
gos[i] = BuildGeometry(builder, p, GeometryType.Polygon, dimensions);
}
go.gos = gos;
return(go);
}
var coordinates = geometry.Coordinates
.SelectMany(c => new double[] { c.X, c.Y })
.ToArray();
go.coordsOffset = Geometry.CreateXyVector(builder, coordinates);
if (go.ends != null)
{
go.endsOffset = Geometry.CreateEndsVector(builder, go.ends);
}
return(go);
}
public static GeometryOffsets BuildGeometry(FlatBufferBuilder builder, IGeometry geometry, GeometryType geometryType, byte dimensions)
{
var go = new GeometryOffsets();
var coordinates = geometry.Coordinates
.SelectMany(c => new double[] { c.X, c.Y })
.ToArray();
go.coordsOffset = Geometry.CreateCoordsVector(builder, coordinates);
var lengths = CreateLengths(geometry, dimensions);
if (lengths != null)
{
go.lengthsOffset = Geometry.CreateLengthsVector(builder, lengths.ToArray());
}
var ringLengths = CreateRingLengths(geometry, geometryType, dimensions);
if ((geometryType == GeometryType.Polygon && (geometry as IPolygon).InteriorRings.Length > 0) ||
(geometryType == GeometryType.MultiPolygon))
{
go.ringLengthsOffset = Geometry.CreateRingLengthsVector(builder, ringLengths.ToArray());
}
if (geometryType == GeometryType.MultiPolygon && geometry.NumGeometries > 1)
{
var mp = geometry as IMultiPolygon;
var ringCounts = mp.Geometries
.Select(g => g as IPolygon)
.Select(p => (uint)p.InteriorRings.Length + 1);
go.ringCountsOffset = Geometry.CreateRingCountsVector(builder, ringCounts.ToArray());
}
return(go);
}
