Class CoordinateSequences

Utility functions for manipulating CoordinateSequences.

Inheritance

Object

CoordinateSequences

Inherited Members

Object.Equals(Object)

Object.Equals(Object, Object)

Object.GetHashCode()

Object.GetType()

Object.MemberwiseClone()

Object.ReferenceEquals(Object, Object)

Object.ToString()

Namespace: NetTopologySuite.Geometries

Assembly: NetTopologySuite.dll

Syntax

public static class CoordinateSequences

Methods

Copy(CoordinateSequence, Int32, CoordinateSequence, Int32, Int32)

Copies a section of a CoordinateSequence to another CoordinateSequence. The sequences may have different dimensions; in this case only the common dimensions are copied.

Declaration

public static void Copy(CoordinateSequence src, int srcPos, CoordinateSequence dest, int destPos, int length)

Parameters

Type	Name	Description
CoordinateSequence	src	The sequence to copy coordinates from
Int32	srcPos	The starting index of the coordinates to copy
CoordinateSequence	dest	The sequence to which the coordinates should be copied to
Int32	destPos	The starting index of the coordinates in
Int32	length	The number of coordinates to copy

CopyCoord(CoordinateSequence, Int32, CoordinateSequence, Int32)

Copies a coordinate of a CoordinateSequence to another CoordinateSequence. The sequences may have different dimensions; in this case only the common dimensions are copied.

Declaration

public static void CopyCoord(CoordinateSequence src, int srcPos, CoordinateSequence dest, int destPos)

Parameters

Type	Name	Description
CoordinateSequence	src	The sequence to copy coordinate from
Int32	srcPos	The index of the coordinate to copy
CoordinateSequence	dest	The sequence to which the coordinate should be copied to
Int32	destPos	The index of the coordinate in

EnsureValidRing(CoordinateSequenceFactory, CoordinateSequence)

Ensures that a CoordinateSequence forms a valid ring, returning a new closed sequence of the correct length if required. If the input sequence is already a valid ring, it is returned without modification. If the input sequence is too short or is not closed, it is extended with one or more copies of the start point.

Declaration

public static CoordinateSequence EnsureValidRing(CoordinateSequenceFactory fact, CoordinateSequence seq)

Parameters

Type	Name	Description
CoordinateSequenceFactory	fact	The CoordinateSequenceFactory to use to create the new sequence
CoordinateSequence	seq	The sequence to test

Returns

Type	Description
CoordinateSequence	The original sequence, if it was a valid ring, or a new sequence which is valid.

Extend(CoordinateSequenceFactory, CoordinateSequence, Int32)

Extends a given CoordinateSequence.

Because coordinate sequences are fix in size, extending is done by creating a new coordinate sequence of the requested size.

The new, trailing coordinate entries (if any) are filled with the last coordinate of the input sequence

Declaration

public static CoordinateSequence Extend(CoordinateSequenceFactory fact, CoordinateSequence seq, int size)

Parameters

Type	Name	Description
CoordinateSequenceFactory	fact	The factory to use when creating the new sequence.
CoordinateSequence	seq	The sequence to extend.
Int32	size	The required size of the extended sequence

Returns

Type	Description
CoordinateSequence	The extended sequence

IndexOf(Coordinate, CoordinateSequence)

Returns the index of coordinate in a CoordinateSequence The first position is 0; the second, 1; etc.

Declaration

public static int IndexOf(Coordinate coordinate, CoordinateSequence seq)

Parameters

Type	Name	Description
Coordinate	coordinate	The Coordinate to search for
CoordinateSequence	seq	The coordinate sequence to search

Returns

Type	Description
Int32	The position of coordinate, or -1 if it is not found

IsEqual(CoordinateSequence, CoordinateSequence)

Tests whether two CoordinateSequences are equal. To be equal, the sequences must be the same length. They do not need to be of the same dimension, but the ordinate values for the smallest dimension of the two must be equal. Two NaN ordinates values are considered to be equal.

Declaration

public static bool IsEqual(CoordinateSequence seq1, CoordinateSequence seq2)

Parameters

Type	Name	Description
CoordinateSequence	seq1	a CoordinateSequence
CoordinateSequence	seq2	a CoordinateSequence

Returns

Type	Description
Boolean	true if the sequences are equal in the common dimensions

IsEqualAt(CoordinateSequence, Int32, CoordinateSequence, Int32)

Tests whether two Coordinates CoordinateSequences are equal. They do not need to be of the same dimension, but the ordinate values for the common ordinates of the two must be equal. Two NaN ordinates values are considered to be equal.

Declaration

public static bool IsEqualAt(CoordinateSequence seq1, int pos1, CoordinateSequence seq2, int pos2)

Parameters

Type	Name	Description
CoordinateSequence	seq1	A CoordinateSequence
Int32	pos1	The index of the Coordinate in seq1.
CoordinateSequence	seq2	a CoordinateSequence
Int32	pos2	The index of the Coordinate in seq2.

Returns

Type	Description
Boolean	true if the sequences are equal in the common dimensions

IsRing(CoordinateSequence)

Tests whether a CoordinateSequence forms a valid LinearRing, by checking the sequence length and closure (whether the first and last points are identical in 2D). Self-intersection is not checked.

Declaration

public static bool IsRing(CoordinateSequence seq)

Parameters

Type	Name	Description
CoordinateSequence	seq	The sequence to test

Returns

Type	Description
Boolean	True if the sequence is a ring

See Also

LinearRing

MinCoordinate(CoordinateSequence)

Returns the minimum coordinate, using the usual lexicographic comparison.

Declaration

public static Coordinate MinCoordinate(CoordinateSequence seq)

Parameters

Type	Name	Description
CoordinateSequence	seq	The coordinate sequence to search

Returns

Type	Description
Coordinate	The minimum coordinate in the sequence, found using CompareTo(Coordinate)

MinCoordinateIndex(CoordinateSequence)

Returns the index of the minimum coordinate of the whole coordinate sequence, using the usual lexicographic comparison.

Declaration

public static int MinCoordinateIndex(CoordinateSequence seq)

Parameters

Type	Name	Description
CoordinateSequence	seq	The coordinate sequence to search

Returns

Type	Description
Int32	The index of the minimum coordinate in the sequence, found using CompareTo(Coordinate)

MinCoordinateIndex(CoordinateSequence, Int32, Int32)

Returns the index of the minimum coordinate of a part of the coordinate sequence (defined by from and to), using the usual lexicographic comparison.

Declaration

public static int MinCoordinateIndex(CoordinateSequence seq, int from, int to)

Parameters

Type	Name	Description
CoordinateSequence	seq	The coordinate sequence to search
Int32	from	The lower search index
Int32	to	The upper search index

Returns

Type	Description
Int32	The index of the minimum coordinate in the sequence, found using CompareTo(Coordinate)

Reverse(CoordinateSequence)

Reverses the coordinates in a sequence in-place.

Declaration

public static void Reverse(CoordinateSequence seq)

Parameters

Type	Name	Description
CoordinateSequence	seq	The coordinate sequence to reverse.

Scroll(CoordinateSequence, Coordinate)

Shifts the positions of the coordinates until firstCoordinate is first.

Declaration

public static void Scroll(CoordinateSequence seq, Coordinate firstCoordinate)

Parameters

Type	Name	Description
CoordinateSequence	seq	The coordinate sequence to rearrange
Coordinate	firstCoordinate	The coordinate to make first">

Scroll(CoordinateSequence, Int32)

Shifts the positions of the coordinates until the coordinate at firstCoordinateIndex is first.

Declaration

public static void Scroll(CoordinateSequence seq, int indexOfFirstCoordinate)

Parameters

Type	Name	Description
CoordinateSequence	seq	The coordinate sequence to rearrange
Int32	indexOfFirstCoordinate	The index of the coordinate to make first

Scroll(CoordinateSequence, Int32, Boolean)

Shifts the positions of the coordinates until the coordinate at firstCoordinateIndex is first.

Declaration

public static void Scroll(CoordinateSequence seq, int indexOfFirstCoordinate, bool ensureRing)

Parameters

Type	Name	Description
CoordinateSequence	seq	The coordinate sequence to rearrange
Int32	indexOfFirstCoordinate	The index of the coordinate to make first
Boolean	ensureRing	Makes sure that seq will be a closed ring upon exit

Swap(CoordinateSequence, Int32, Int32)

Swaps two coordinates in a sequence.

Declaration

public static void Swap(CoordinateSequence seq, int i, int j)

Parameters

Type	Name	Description
CoordinateSequence	seq	seq the sequence to modify
Int32	i	the index of a coordinate to swap
Int32	j	the index of a coordinate to swap

ToString(CoordinateSequence)

Creates a string representation of a CoordinateSequence. The format is:

( ord0,ord1.. ord0,ord1,... ... )

Declaration

public static string ToString(CoordinateSequence cs)

Parameters

Type	Name	Description
CoordinateSequence	cs	the sequence to output

Returns

Type	Description
String	the string representation of the sequence

TryRawCopy(PackedFloatCoordinateSequence, Int32, PackedFloatCoordinateSequence, Int32, Int32)

Copies a section of a PackedFloatCoordinateSequence to another PackedFloatCoordinateSequence. The sequences must have same dimensions.

Declaration

public static bool TryRawCopy(PackedFloatCoordinateSequence src, int srcPos, PackedFloatCoordinateSequence dest, int destPos, int length)

Parameters

Type	Name	Description
PackedFloatCoordinateSequence	src	The sequence to copy coordinates from
Int32	srcPos	The starting index of the coordinates to copy
PackedFloatCoordinateSequence	dest	The sequence to which the coordinates should be copied to
Int32	destPos	The starting index of the coordinates in
Int32	length	The number of coordinates to copy

Returns

Type	Description
Boolean