public override RingSet2 <double> ConstructRingSet(Ring2 <double>[] chains)
{
if (chains == null || chains.Length < 1)
{
return(null);
}
Ring2 <double>[] Chains = new Ring2 <double> [chains.Length];
Array.Copy(chains, Chains, Chains.Length);
PlanarChainGraph <double> graph = new PlanarChainGraph <double>();
foreach (Ring2 <double> ch in Chains)
{
if (ch == null)
{
return(null); //can't have null chains
}
graph.Add(ch);
}
if (PlanarGraphUtils.AnyIntersections(graph)) //there must be overlap
{
return(null);
}
return(new RingSet2 <double>(Chains));
}
internal Polyline2(Ring2 <T> other)
{
//this is safe since a ring is simple and closed, therefore a chain will be as well
//converse is not true -- closing a ring can create a self-intersection
this.Points = other.Points;
this.IsReversed = other.IsReversed;
}
/// <summary>
/// Creates a <c>Polygon</c> using the next token in the stream.
/// </summary>
/// <param name="tokens">
/// Tokenizer over a stream of text in Well-known Text
/// format. The next tokens must form a Polygon Text.
/// </param>
/// <param name="factory"> </param>
/// <returns>
/// A <c>Polygon</c> specified by the next token
/// in the stream.
/// </returns>
private Polygon2 <double> ReadPolygonText(IEnumerator <Token> tokens)
{
string nextToken = GetNextEmptyOrOpener(tokens);
if (nextToken.Equals("EMPTY"))
{
return(null);
}
var holes = new List <Ring2 <double> >();
var shell = ReadLinearRingText(tokens);
nextToken = GetNextCloserOrComma(tokens);
while (nextToken.Equals(","))
{
Ring2 <double> hole = ReadLinearRingText(tokens);
holes.Add(hole);
nextToken = GetNextCloserOrComma(tokens);
}
if (holes.Count < 1)
{
return(factory.ConstructPolygon(shell));
}
return(factory.ConstructPolygon(shell, factory.ConstructRingSet(holes)));
}
public Polygon2 <T> Reverse()
{
Ring2 <T> o = this.OuterRing.Reverse();
RingSet2 <T> i = this.InnerRings.Reverse();
return(new Polygon2 <T>(o, i));
}
public bool HasCoincidentPoints()
{
if (this.InnerRings == null)
{
return(false); //duh, only one chain
}
HashSet <Point2 <T> > distinctPoints = new HashSet <Point2 <T> >();
Ring2 <T> curChain = this.OuterRing;
foreach (Point2 <T> curPoint in curChain.Points)
{
distinctPoints.Add(curPoint);
}
Ring2 <T>[] rings = this.InnerRings.Rings;
for (int i = 0; i < rings.Length; i++)
{
curChain = rings[i];
foreach (Point2 <T> curPoint in curChain.Points)
{
if (distinctPoints.Contains(curPoint))
{
return(true); //found a dup!
}
distinctPoints.Add(curPoint);
}
}
return(false);
}
public bool HasCoincidentPoints()
{
if (this.Rings.Length < 2)
{
return(false); //duh, only one chain
}
HashSet <Point2 <T> > distinctPoints = new HashSet <Point2 <T> >();
Ring2 <T> curChain = this.Rings[0];
foreach (Point2 <T> curPoint in curChain.Points)
{
distinctPoints.Add(curPoint);
}
for (int i = 1; i < this.Rings.Length; i++)
{
curChain = this.Rings[i];
foreach (Point2 <T> curPoint in curChain.Points)
{
if (distinctPoints.Contains(curPoint))
{
return(true); //found a dup!
}
distinctPoints.Add(curPoint);
}
}
return(false);
}
public override RingSet2 <double> ConstructRingSet(IList <Ring2 <double> > chains)
{
if (chains == null || chains.Count < 1)
{
return(null);
}
Ring2 <double>[] Chains = new Ring2 <double> [chains.Count];
for (int i = 0; i < Chains.Length; i++)
{
Chains[i] = chains[i];
}
PlanarChainGraph <double> graph = new PlanarChainGraph <double>();
foreach (Ring2 <double> ch in Chains)
{
if (ch == null)
{
return(null); //can't have null chains
}
graph.Add(ch);
}
if (PlanarGraphUtils.AnyIntersections(graph)) //there must be overlap
{
return(null);
}
return(new RingSet2 <double>(Chains));
}
internal Polygon2(Ring2 <T> outerRing)
{
if (outerRing == null)
{
throw new ArgumentNullException();
}
this.OuterRing = outerRing;
}
internal Polygon2(Ring2 <T> outerRing, RingSet2 <T> innerRings)
{
if (outerRing == null)
{
throw new ArgumentNullException();
}
this.OuterRing = outerRing;
this.InnerRings = innerRings;
}
public Polygon2(Polygon2 <T> cloned)
{
if (cloned == null)
{
throw new ArgumentNullException();
}
this.OuterRing = cloned.OuterRing;
this.InnerRings = cloned.InnerRings;
}
public RingSet2 <T> Reverse()
{
Ring2 <T>[] r = new Ring2 <T> [this.Rings.Length];
for (int i = 0; i < r.Length; i++)
{
r[i] = this.Rings[i].Reverse();
}
return(new RingSet2 <T>(r));
}
//Trusted constructor -- uses array directly -- no nulls!
internal Ring2(Ring2 <T> other, bool isReversed, Orientation orientation)
{
if (other == null)
{
throw new ArgumentNullException();
}
this.Points = other.Points;
this.IsReversed = isReversed;
this.Orientation = Orientation.Counterclockwise;
}
public Ring2(Ring2 <T> other)
{
if (other == null)
{
throw new ArgumentNullException();
}
this.Points = other.Points;
this.IsReversed = other.IsReversed;
this.Orientation = other.Orientation;
}
internal LineChain2(Ring2 <T> other, bool isReversed)
{
//this is safe since a ring is simple and closed, therefore a chain will be as well
//converse is not true -- closing a ring can create a self-intersection
if (other == null)
{
throw new ArgumentNullException();
}
this.Points = other.Points;
this.IsReversed = isReversed;
}
public Polygon2 <T> ConstructPolygon(Ring2 <T> outerRing, Ring2 <T>[] innerRings)
{
if (outerRing != null && innerRings != null)
{
RingSet2 <T> rs = ConstructRingSet(innerRings);
if (rs != null)
{
return(ConstructPolygon(outerRing, rs));
}
}
return(null);
}
public static Polygon2 <double> OpenSimplePolygonPoints(Point2 <double>[] outerRingPoints, Ring2 <double>[] innerRings)
{
Ring2 <double> ring = RingUtils.OpenSimpleRingPoints(outerRingPoints);
if (ring == null)
{
return(null);
}
Polygon2 <double> tmpP;
tmpP = ring.Factory.ConstructPolygon(ring, innerRings);
return(tmpP);
}
public Polygon2 <T> ConstructPolygon(Point2 <T>[] outerRing, Point2 <T>[][] innerRings)
{
if (outerRing != null && innerRings != null)
{
Ring2 <T> outer = ConstructRing(outerRing);
if (outer != null)
{
RingSet2 <T> inner = ConstructRingSet(innerRings);
if (inner != null)
{
return(ConstructPolygon(outer, inner));
}
}
}
return(null);
}
public int CompareTo(Ring2 <T> other)
{
if (other == null)
{
return(1);
}
if (object.ReferenceEquals(this, other))
{
return(0);
}
if (object.ReferenceEquals(this.Points, other.Points))
{
return(0);
}
return(this.Envelope.CompareTo(other.Envelope));
}
public override Polygon2 <double> ConstructPolygon(Ring2 <double> outerRing, RingSet2 <double> innerRings)
{
if (outerRing == null)
{
return(null);
}
if (innerRings == null)
{
return(new Polygon2 <double>(outerRing));
}
if (PlanarGraphUtils.ValidPolygon(outerRing, innerRings))
{
return(new Polygon2 <double>(outerRing, innerRings));
}
return(null);
}
public RingBag2 <T> ConstructRingBag(IList <Ring2 <T> > chains)
{
if (chains != null && chains.Count > 0)
{
Ring2 <T>[] Chains = new Ring2 <T> [chains.Count];
for (int i = 0; i < Chains.Length; i++)
{
Ring2 <T> ch = chains[i];
if (ch == null)
{
return(null); //can't have null chains
}
Chains[i] = ch;
}
return(new RingBag2 <T>(Chains));
}
return(null);
}
public RingBag2 <T> ConstructRingBag(Ring2 <T>[] chains)
{
if (chains != null && chains.Length > 0)
{
Ring2 <T>[] Chains = new Ring2 <T> [chains.Length];
Array.Copy(chains, Chains, Chains.Length);
foreach (Ring2 <T> ch in Chains)
{
if (ch == null)
{
return(null); //can't have null chains
}
}
return(new RingBag2 <T>(Chains));
}
return(null);
}
public static Polygon2 <double> InvertExtent(PolygonSet2 <double> polys)
{
if (polys != null)
{
Ring2 <double> outer = polys.Factory.ConstructRing(polys.Envelope);
Ring2 <double>[] inners = new Ring2 <double> [polys.Polygons.Length];
for (int i = 0; i < inners.Length; i++)
{
inners[i] = polys.Polygons[i].OuterRing;
}
RingSet2 <double> innerSet = polys.Factory.ConstructRingSet(inners);
if (innerSet == null)
{
return(null);
}
return(polys.Factory.ConstructPolygon(outer, innerSet));
}
return(null);
}
//POLYGON((0 0,4 0,4 4,0 4,0 0),(1 1, 2 1, 2 2, 1 2,1 1))
public static string ToWkt(Ring2 <double> geom)
{
if (geom != null)
{
StringBuilder sb = new StringBuilder();
sb.Append("POLYGON((");
for (uint i = 0; i < geom.VertexCount; i++)
{
sb.Append(geom[i].X);
sb.Append(' ');
sb.Append(geom[i].Y);
sb.Append(',');
}
sb[sb.Length - 1] = ')';
sb.Append(')');
return(sb.ToString());
}
return(string.Empty);
}
public bool Equals(Ring2 <T> other)
{
if (other == null)
{
return(false);
}
if (object.ReferenceEquals(this, other))
{
return(true); //cheat for memory eqivalence
}
if (object.ReferenceEquals(this.Points, other.Points))
{
return(true);
}
if (this.Points.Length != other.Points.Length)
{
return(false);
}
if (this.IsReversed == other.IsReversed)
{
for (int i = 0; i < this.Points.Length; i++)
{
if (!this.Points[i].Equals(other.Points[i]))
{
return(false);
}
}
}
else
{
int le = this.Points.Length - 1;
for (int i = 0; i < this.Points.Length; i++)
{
if (!this.Points[i].Equals(other.Points[le - i]))
{
return(false);
}
}
}
return(true);
}
public RingBag2 <T> ConstructRingBag(IList <Point2 <T> >[] chains)
{
if (chains != null)
{
List <Ring2 <T> > constructed = new List <Ring2 <T> >();
foreach (Point2 <T>[] ch in chains)
{
if (ch == null)
{
return(null);
}
Ring2 <T> chn = ConstructRing(ch);
if (chn == null)
{
return(null);
}
constructed.Add(chn);
}
return(ConstructRingBag(constructed));
}
return(null);
}
public bool EqualsNonDirectional(Ring2 <T> other)
{
if (other == null)
{
return(false);
}
if (object.ReferenceEquals(this, other))
{
return(true); //cheat for memory eqivalence
}
if (this.Points.Length != other.Points.Length)
{
return(false);
}
if (this.Points[0].Equals(other.Points[0])) //forward compare
{
for (int i = 0; i < this.Points.Length; i++)
{
if (!this.Points[i].Equals(other.Points[i]))
{
return(false);
}
}
return(true);
}
else if (this.Points[this.Points.Length - 1].Equals(other.Points[0])) //reverse compare
{
int id = this.Points.Length - 1;
for (int i = 0; i < this.Points.Length; i++)
{
if (!this.Points[id - i].Equals(other.Points[i]))
{
return(false);
}
}
return(true);
}
return(false);
}
public override PolygonSet2 <double> ConstructPolygonSet(Polygon2 <double>[] parts)
{
if (parts == null)
{
return(null);
}
Ring2 <double>[] shells = new Ring2 <double> [parts.Length];
for (int i = 0; i < parts.Length; i++)
{
Polygon2 <double> curA = parts[i];
if (curA == null)
{
return(null);
}
shells[i] = curA.OuterRing;
}
if (PlanarGraphUtils.ValidRingSet(shells))
{
return(new PolygonSet2 <double>(parts));
}
return(null);
}
public PointSet2 <T> CoincidentPoints()
{
//since each line chain by definition has no coincident points, we only need to compare between chains
if (this.InnerRings == null)
{
return(null); //duh, only one chain
}
HashSet <Point2 <T> > distinctPoints = new HashSet <Point2 <T> >();
HashSet <Point2 <T> > dupPoints = new HashSet <Point2 <T> >();
Ring2 <T> curChain = this.OuterRing;
foreach (Point2 <T> curPoint in curChain.Points)
{
distinctPoints.Add(curPoint);
}
Ring2 <T>[] rings = this.InnerRings.Rings;
for (int i = 0; i < rings.Length; i++)
{
curChain = rings[i];
foreach (Point2 <T> curPoint in curChain.Points)
{
if (distinctPoints.Contains(curPoint))
{
dupPoints.Add(curPoint); //found a dup!
}
else
{
distinctPoints.Add(curPoint);
}
}
}
if (dupPoints.Count < 1)
{
return(null);
}
return(new PointSet2 <T>(dupPoints.ToArray())); //avoid overhead checking for dups in constructor
}
public override RingSet2 <double> ConstructRingSet(IEnumerable <Point2 <double>[]> chains)
{
if (chains == null)
{
return(null);
}
List <Ring2 <double> > constructed = new List <Ring2 <double> >();
foreach (Point2 <double>[] ch in chains)
{
if (ch == null)
{
return(null);
}
Ring2 <double> chn = ConstructRing(ch);
if (chn == null)
{
return(null);
}
constructed.Add(chn);
}
return(ConstructRingSet(constructed));
}
public static Polygon2 <double> BuildPolygon(PositionSet ps)
{
try
{
if (ps != null && ps.Positions.Count > 0)
{
List <Point2 <double> > list1 = BuildCoords(ps.Positions[0] as PositionSet);
if (list1 != null && list1.Count > 2)
{
if (ps.Positions.Count == 1)
{
return(factory.ConstructPolygon(factory.ConstructRing(list1)));
}
Ring2 <double> linearRing1 = factory.ConstructRing(list1);
List <Ring2 <double> > list2 = new List <Ring2 <double> >();
for (int index = 1; index < ps.Positions.Count; ++index)
{
Position position = ps.Positions[index];
if (position != null)
{
List <Point2 <double> > list3 = BuildCoords(position as PositionSet);
if (list3 != null)
{
Ring2 <double> linearRing2 = factory.ConstructRing(list3);
list2.Add(linearRing2);
}
}
}
return(factory.ConstructPolygon(linearRing1, list2.ToArray()));
}
}
}
catch
{
}
return(null);
}
