private static bool LineStringToLineStripAdjacency(GeoAPI.Geometries.ILineString _lineString, Ellipsoid _shape, List <Vector2> positions, List <ushort> indices)
{
if (_lineString == null)
{
throw new Exception("_lineString is Null");
}
if (_lineString.IsClosed)
{
//记录起点
ushort indicesMax = (ushort)positions.Count();
//添加第一个环的最后一个点
indices.Add((ushort)(indicesMax + _lineString.Coordinates.Length - 2));
//对于polygon来说第一个点和最后一个点是相同的,因此只添加一次
for (int i = 0; i < _lineString.Coordinates.Length - 1; i++)
{
var coord = _lineString.Coordinates[i];
var geoDetic = new Vector2(MathExtension.ToRadius(coord.X), MathExtension.ToRadius(coord.Y));
positions.Add(geoDetic);
indices.Add((ushort)(indicesMax + i));
}
//添加起点
indices.Add((ushort)(indicesMax));
//添加第二个点
indices.Add((ushort)(indicesMax + 1));
}
else
{
//非闭合的情况下,首尾特殊处理即可
throw new Exception("Not Support!");
}
return(true);
}
internal static DotSpatial.Topology.LineString ToDotSpatialLineString(GeoAPI.Geometries.ILineString l)
{
DotSpatial.Topology.Coordinate[] c = new DotSpatial.Topology.Coordinate[l.Coordinates.Count()];
for (int i = 0; i < l.Coordinates.Count(); i++)
{
c[i] = new DotSpatial.Topology.Coordinate(l.Coordinates[i].X, l.Coordinates[i].Y);
}
return(new DotSpatial.Topology.LineString(c));
}
internal static Geometries.LineString ToSharpMapLineString(NTSLineString geom)
{
Collection <Geometries.Point> vertices = new Collection <Geometries.Point>();
foreach (Coordinate coordinate in geom.Coordinates)
{
vertices.Add(ToSharpMapPoint(coordinate));
}
return(new Geometries.LineString(vertices));
}
private static SMMultiLineString SqlGeometryToSharpMapMultiLineString(SqlGeometry geometry, Factory factory)
{
var fact = factory ?? Services.CreateGeometryFactory((int)geometry.STSrid);
var lineStrings = new SMLineString[(int)geometry.STNumGeometries()];
for (var i = 1; i <= geometry.STNumGeometries(); i++)
{
lineStrings[i - 1] = (SMLineString)SqlGeometryToSharpMapLineString(geometry.STGeometryN(i), fact);
}
return(fact.CreateMultiLineString(lineStrings));
}
internal static NTSMultiLineString ToNTSMultiLineString(Geometries.MultiLineString geom,
IGeometryFactory factory)
{
NTSLineString[] lstrings = new NTSLineString[geom.LineStrings.Count];
int index = 0;
foreach (Geometries.LineString lstring in geom.LineStrings)
{
lstrings[index++] = ToNTSLineString(lstring, factory);
}
return(factory.CreateMultiLineString(lstrings) as NTSMultiLineString);
}
private static void SharpMapLineStringToSqlGeometry(SqlGeometryBuilder geomBuilder, SMLineString lineString)
{
geomBuilder.BeginGeometry(OpenGisGeometryType.LineString);
var coords = lineString.Coordinates;
geomBuilder.BeginFigure(coords[0].X, coords[0].Y);
for (int i = 1; i < lineString.NumPoints; i++)
{
var point = coords[i];
geomBuilder.AddLine(point.X, point.Y);
}
geomBuilder.EndFigure();
geomBuilder.EndGeometry();
}
private static SMMultiLineString SqlGeometryToSharpMapMultiLineString(SqlGeometry geometry, Factory factory)
{
var fact = factory ?? Services.CreateGeometryFactory((int)geometry.STSrid);
var lineStrings = new SMLineString[(int)geometry.STNumGeometries()];
for (var i = 1; i <= geometry.STNumGeometries(); i++)
lineStrings[i-1] = (SMLineString)SqlGeometryToSharpMapLineString(geometry.STGeometryN(i), fact);
return fact.CreateMultiLineString(lineStrings);
}
private static void SharpMapLineStringToSqlGeometry(SqlGeometryBuilder geomBuilder, SMLineString lineString)
{
geomBuilder.BeginGeometry(OpenGisGeometryType.LineString);
var coords = lineString.Coordinates;
geomBuilder.BeginFigure(coords[0].X, coords[0].Y);
for (int i = 1; i < lineString.NumPoints; i++)
{
var point = coords[i];
geomBuilder.AddLine(point.X, point.Y);
}
geomBuilder.EndFigure();
geomBuilder.EndGeometry();
}
internal static Geometries.LineString ToSharpMapLineString(NTSLineString geom)
{
Collection<Geometries.Point> vertices = new Collection<Geometries.Point>();
foreach (Coordinate coordinate in geom.Coordinates)
vertices.Add(ToSharpMapPoint(coordinate));
return new Geometries.LineString(vertices);
}
internal static NTSMultiLineString ToNTSMultiLineString(Geometries.MultiLineString geom,
IGeometryFactory factory)
{
NTSLineString[] lstrings = new NTSLineString[geom.LineStrings.Count];
int index = 0;
foreach (Geometries.LineString lstring in geom.LineStrings)
lstrings[index++] = ToNTSLineString(lstring, factory);
return factory.CreateMultiLineString(lstrings) as NTSMultiLineString;
}