private static IEnumerable <uint> Encode(IPolygonal polygonal, TileGeometryTransform tgt, int zoom)
{
var geometry = (Geometry)polygonal;
//Test the whole polygon geometry is larger than a single pixel.
if (IsGreaterThanOnePixelOfTile(geometry, zoom))
{
int currentX = 0, currentY = 0;
for (int i = 0; i < geometry.NumGeometries; i++)
{
var polygon = (Polygon)geometry.GetGeometryN(i);
//Test that individual polygons are larger than a single pixel.
if (!IsGreaterThanOnePixelOfTile(polygon, zoom))
{
continue;
}
foreach (uint encoded in Encode(polygon.Shell.CoordinateSequence, tgt, ref currentX, ref currentY, true, false))
{
yield return(encoded);
}
foreach (var hole in polygon.InteriorRings)
{
foreach (uint encoded in Encode(hole.CoordinateSequence, tgt, ref currentX, ref currentY, true, true))
{
yield return(encoded);
}
}
}
}
}
/*
* internal static IGeometry PolygonizeForClip(IGeometry geometry, IPreparedGeometry clip)
* {
* var lines = LineStringExtracter.GetLines(geometry);
* var clippedLines = new List<IGeometry>();
* foreach (ILineString line in lines)
* {
* if (clip.Contains(line))
* clippedLines.Add(line);
* }
* var polygonizer = new Polygonizer();
* polygonizer.Add(clippedLines);
* var polys = polygonizer.GetPolygons();
* var polyArray = GeometryFactory.ToGeometryArray(polys);
* return geometry.Factory.CreateGeometryCollection(polyArray);
* }
*/
internal static IGeometry ClipPolygon(IGeometry polygon, IPolygonal clipPolygonal)
{
var clipPolygon = (IGeometry)clipPolygonal;
var nodedLinework = polygon.Boundary.Union(clipPolygon.Boundary);
var polygons = Polygonize(nodedLinework);
/*
* // Build a prepared clipPolygon
* var prepClipPolygon = NetTopologySuite.Geometries.Prepared.PreparedGeometryFactory.Prepare(clipPolygon);
*/
// only keep polygons which are inside the input
var output = new List <IGeometry>();
for (int i = 0; i < polygons.NumGeometries; i++)
{
var candpoly = (IPolygon)polygons.GetGeometryN(i);
var interiorPoint = candpoly.InteriorPoint;
if (polygon.Contains(interiorPoint) &&
/*prepClipPolygon.Contains(candpoly)*/
clipPolygon.Contains(interiorPoint))
{
output.Add(candpoly);
}
}
/*
* return polygon.Factory.CreateGeometryCollection(
* GeometryFactory.ToGeometryArray(output));
*/
return(polygon.Factory.BuildGeometry(output));
}
internal static IGeometry ClipPolygon(IGeometry polygon, IPolygonal clipPolygonal)
{
var clipPolygon = (IGeometry) clipPolygonal;
var nodedLinework = polygon.Boundary.Union(clipPolygon.Boundary);
var polygons = Polygonize(nodedLinework);
/*
// Build a prepared clipPolygon
var prepClipPolygon = NetTopologySuite.Geometries.Prepared.PreparedGeometryFactory.Prepare(clipPolygon);
*/
// only keep polygons which are inside the input
var output = new List<IGeometry>();
for (var i = 0; i < polygons.NumGeometries; i++)
{
var candpoly = (IPolygon) polygons.GetGeometryN(i);
var interiorPoint = candpoly.InteriorPoint;
if (polygon.Contains(interiorPoint) &&
/*prepClipPolygon.Contains(candpoly)*/
clipPolygon.Contains(interiorPoint))
output.Add(candpoly);
}
/*
return polygon.Factory.CreateGeometryCollection(
GeometryFactory.ToGeometryArray(output));
*/
return polygon.Factory.BuildGeometry(output);
}
public void Render(Map map, IPolygonal geometry, Graphics graphics)
{
var mp = geometry as MultiPolygon;
if (mp != null)
{
foreach (Polygon poly in mp.Polygons)
OnRenderInternal(map, poly, graphics);
return;
}
OnRenderInternal(map, (Polygon)geometry, graphics);
}
/// <summary>
/// Function to render the geometry
/// </summary>
/// <param name="map">The map object, mainly needed for transformation purposes.</param>
/// <param name="geometry">The geometry to symbolize.</param>
/// <param name="graphics">The graphics object to use.</param>
public void Render(Map map, IPolygonal geometry, Graphics graphics)
{
var mp = geometry as IMultiPolygon;
if (mp != null)
{
for (var i = 0; i < mp.NumGeometries;i++)
{
var poly = (IPolygon) mp[i];
OnRenderInternal(map, poly, graphics);
}
return;
}
OnRenderInternal(map, (IPolygon)geometry, graphics);
}
public void Render(Map map, IPolygonal geometry, Graphics graphics)
{
var mp = geometry as MultiPolygon;
if (mp != null)
{
foreach (Polygon poly in mp.Polygons)
{
OnRenderInternal(map, poly, graphics);
}
return;
}
OnRenderInternal(map, (Polygon)geometry, graphics);
}
/// <summary>
/// Function to render the geometry
/// </summary>
/// <param name="map">The map object, mainly needed for transformation purposes.</param>
/// <param name="geometry">The geometry to symbolize.</param>
/// <param name="graphics">The graphics object to use.</param>
public void Render(Map map, IPolygonal geometry, Graphics graphics)
{
var mp = geometry as IMultiPolygon;
if (mp != null)
{
for (var i = 0; i < mp.NumGeometries; i++)
{
var poly = (IPolygon)mp[i];
OnRenderInternal(map, poly, graphics);
}
return;
}
OnRenderInternal(map, (IPolygon)geometry, graphics);
}
private static IGeometry OrientationEnsured(IPolygonal geometry)
{
var polygon = geometry as IPolygon;
if (polygon != null)
{
return(OrientationEnsured(polygon));
}
var mp = (IMultiPolygon)geometry;
var polygons = new IPolygon[mp.NumGeometries];
for (var i = 0; i < mp.NumGeometries; i++)
{
polygons[i] = (IPolygon)OrientationEnsured((IPolygon)mp.GetGeometryN(i));
}
return(mp.Factory.CreateMultiPolygon(polygons));
}
public PreparedPolygon(IPolygonal poly)
: base((IGeometry)poly)
{
_isRectangle = Geometry.IsRectangle;
}
private static IGeometry OrientationEnsured(IPolygonal geometry)
{
var polygon = geometry as IPolygon;
if (polygon != null)
return OrientationEnsured(polygon);
var mp = (IMultiPolygon)geometry;
var polygons = new IPolygon[mp.NumGeometries];
for (var i = 0; i < mp.NumGeometries; i++)
polygons[i] = (IPolygon)OrientationEnsured((IPolygon)mp.GetGeometryN(i));
return mp.Factory.CreateMultiPolygon(polygons);
}
public PreparedPolygon(IPolygonal poly)
: base((IGeometry)poly)
{
_isRectangle = Geometry.IsRectangle;
}
