public void CanWritePolygonWithInnerRing()
{
var ring1 = new List <Pnt3D>
{
new Pnt3D(0, 0, 9),
new Pnt3D(0, 100, 8),
new Pnt3D(100, 100, 5),
new Pnt3D(100, 20, 9)
};
RingGroup polygon = CreatePoly(ring1);
polygon.AddInteriorRing(new Linestring(new[]
{
new Pnt3D(25, 50, 0),
new Pnt3D(50, 50, 0),
new Pnt3D(50, 75, 0),
new Pnt3D(25, 75, 0),
new Pnt3D(25, 50, 0)
}
));
WkbGeomWriter writer = new WkbGeomWriter();
byte[] bytes = writer.WritePolygon(polygon);
WkbGeomReader reader = new WkbGeomReader();
RingGroup deserialized = reader.ReadPolygon(new MemoryStream(bytes));
Assert.IsTrue(deserialized.Equals(polygon));
}
public void CanWriteAndReadMultiPolygonWithInnerRing()
{
var ring1 = new List <Pnt3D>
{
new Pnt3D(0, 0, 9),
new Pnt3D(0, 100, 8),
new Pnt3D(100, 100, 5),
new Pnt3D(100, 20, 9)
};
var disjoint = new List <Pnt3D>();
disjoint.Add(new Pnt3D(140, -10, 0));
disjoint.Add(new Pnt3D(140, 30, 23));
disjoint.Add(new Pnt3D(300, 30, 56));
disjoint.Add(new Pnt3D(300, -10, 0));
RingGroup poly1 = CreatePoly(ring1);
poly1.AddInteriorRing(new Linestring(new[]
{
new Pnt3D(25, 50, 0),
new Pnt3D(50, 50, 0),
new Pnt3D(50, 75, 0),
new Pnt3D(25, 75, 0),
new Pnt3D(25, 50, 0)
}
));
Linestring disjointRing = CreateRing(disjoint);
var poly2 = new RingGroup(disjointRing);
var multipolygon = new List <RingGroup>(new[] { poly1, poly2 });
WkbGeomWriter writer = new WkbGeomWriter();
byte[] bytes = writer.WriteMultipolygon(multipolygon);
WkbGeomReader reader = new WkbGeomReader();
IList <RingGroup> deserialized = reader.ReadMultiPolygon(new MemoryStream(bytes));
Assert.IsTrue(deserialized[0].Equals(multipolygon[0]));
Assert.IsTrue(deserialized[1].Equals(multipolygon[1]));
}
public void CanReadClockwiseWindingPolygon()
{
// Some OGC 1.1 implementations do not have counter-clockwise polygon winding order:
var ring1 = new List <Pnt3D>
{
new Pnt3D(0, 0, 9),
new Pnt3D(0, 100, 8),
new Pnt3D(100, 100, 5),
new Pnt3D(100, 20, 9)
};
RingGroup polygon = CreatePoly(ring1);
polygon.AddInteriorRing(new Linestring(new[]
{
new Pnt3D(25, 50, 0),
new Pnt3D(50, 50, 0),
new Pnt3D(50, 75, 0),
new Pnt3D(25, 75, 0),
new Pnt3D(25, 50, 0)
}
));
RingGroup inverted = (RingGroup)polygon.Clone();
inverted.ReverseOrientation();
WkbGeomWriter writer = new WkbGeomWriter();
byte[] bytes = writer.WritePolygon(inverted);
const bool assumeWkbPolygonsClockwise = true;
WkbGeomReader reader = new WkbGeomReader(assumeWkbPolygonsClockwise);
RingGroup deserialized = reader.ReadPolygon(new MemoryStream(bytes));
Assert.IsTrue(deserialized.Equals(polygon));
}