Class Subdiv2D

Planar Subdivision

Inheritance

System.Object

DisposableObject

DisposableCvObject

Subdiv2D

Implements

ICvPtrHolder

Inherited Members

DisposableCvObject.ptr

DisposableCvObject.CvPtr

DisposableObject.DataHandle

DisposableObject.IsDisposed

DisposableObject.IsEnabledDispose

DisposableObject.AllocatedMemory

DisposableObject.AllocatedMemorySize

DisposableObject.Dispose()

DisposableObject.Dispose(Boolean)

DisposableObject.DisposeManaged()

DisposableObject.AllocGCHandle(Object)

DisposableObject.AllocMemory(Int32)

DisposableObject.NotifyMemoryPressure(Int64)

DisposableObject.ThrowIfDisposed()

Namespace: OpenCvSharp

Assembly: OpenCvSharp.dll

Syntax

public class Subdiv2D : DisposableCvObject, ICvPtrHolder

Constructors

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Subdiv2D()

Creates an empty Subdiv2D object. To create a new empty Delaunay subdivision you need to use the #initDelaunay function.

Declaration

public Subdiv2D()

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Subdiv2D(Rect)

Creates an empty Subdiv2D object.

Declaration

public Subdiv2D(Rect rect)

Parameters

Type	Name	Description
OpenCvSharp.Rect	rect	Rectangle that includes all of the 2D points that are to be added to the subdivision.

Fields

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NEXT_AROUND_DST

Declaration

public const int NEXT_AROUND_DST = 34

Field Value

Type	Description
System.Int32

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NEXT_AROUND_LEFT

Declaration

public const int NEXT_AROUND_LEFT = 19

Field Value

Type	Description
System.Int32

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NEXT_AROUND_ORG

Declaration

public const int NEXT_AROUND_ORG = 0

Field Value

Type	Description
System.Int32

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NEXT_AROUND_RIGHT

Declaration

public const int NEXT_AROUND_RIGHT = 49

Field Value

Type	Description
System.Int32

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PREV_AROUND_DST

Declaration

public const int PREV_AROUND_DST = 51

Field Value

Type	Description
System.Int32

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PREV_AROUND_LEFT

Declaration

public const int PREV_AROUND_LEFT = 32

Field Value

Type	Description
System.Int32

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PREV_AROUND_ORG

Declaration

public const int PREV_AROUND_ORG = 17

Field Value

Type	Description
System.Int32

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PREV_AROUND_RIGHT

Declaration

public const int PREV_AROUND_RIGHT = 2

Field Value

Type	Description
System.Int32

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PTLOC_ERROR

Declaration

public const int PTLOC_ERROR = -2

Field Value

Type	Description
System.Int32

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PTLOC_INSIDE

Declaration

public const int PTLOC_INSIDE = 0

Field Value

Type	Description
System.Int32

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PTLOC_ON_EDGE

Declaration

public const int PTLOC_ON_EDGE = 2

Field Value

Type	Description
System.Int32

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PTLOC_OUTSIDE_RECT

Declaration

public const int PTLOC_OUTSIDE_RECT = -1

Field Value

Type	Description
System.Int32

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PTLOC_VERTEX

Declaration

public const int PTLOC_VERTEX = 1

Field Value

Type	Description
System.Int32

Methods

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DisposeUnmanaged()

Releases unmanaged resources

Declaration

protected override void DisposeUnmanaged()

Overrides

DisposableCvObject.DisposeUnmanaged()

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EdgeDst(Int32, out Point2f)

Returns the edge destination.

Declaration

public int EdgeDst(int edge, out Point2f dstPt)

Parameters

Type	Name	Description
System.Int32	edge	Subdivision edge ID.
OpenCvSharp.Point2f	dstPt	Output vertex location.

Returns

Type	Description
System.Int32	vertex ID.

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EdgeOrg(Int32, out Point2f)

Returns the edge origin.

Declaration

public int EdgeOrg(int edge, out Point2f orgPt)

Parameters

Type	Name	Description
System.Int32	edge	Subdivision edge ID.
OpenCvSharp.Point2f	orgPt	Output vertex location.

Returns

Type	Description
System.Int32	vertex ID.

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FindNearest(Point2f, out Point2f)

Finds the subdivision vertex closest to the given point.

Declaration

public int FindNearest(Point2f pt, out Point2f nearestPt)

Parameters

Type	Name	Description
OpenCvSharp.Point2f	pt	Input point.
OpenCvSharp.Point2f	nearestPt	Output subdivision vertex point.

Returns

Type	Description
System.Int32	vertex ID.

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GetEdge(Int32, NextEdgeType)

Returns one of the edges related to the given edge.

Declaration

public int GetEdge(int edge, NextEdgeType nextEdgeType)

Parameters

Type	Name	Description
System.Int32	edge	Subdivision edge ID.
NextEdgeType	nextEdgeType	Parameter specifying which of the related edges to return. The following values are possible: NEXT_AROUND_ORG next around the edge origin ( eOnext on the picture below if e is the input edge) NEXT_AROUND_DST next around the edge vertex ( eDnext ) PREV_AROUND_ORG previous around the edge origin (reversed eRnext ) PREV_AROUND_DST previous around the edge destination (reversed eLnext ) NEXT_AROUND_LEFT next around the left facet ( eLnext ) NEXT_AROUND_RIGHT next around the right facet ( eRnext ) PREV_AROUND_LEFT previous around the left facet (reversed eOnext ) PREV_AROUND_RIGHT previous around the right facet (reversed eDnext )

Returns

Type	Description
System.Int32

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GetEdgeList()

Returns a list of all edges.

Declaration

public Vec4f[] GetEdgeList()

Returns

Type	Description
Vec4f[]	Output vector.

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GetLeadingEdgeList()

Returns a list of the leading edge ID connected to each triangle. The function gives one edge ID for each triangle.

Declaration

public int[] GetLeadingEdgeList()

Returns

Type	Description
System.Int32[]	Output vector.

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GetTriangleList()

Returns a list of all triangles.

Declaration

public Vec6f[] GetTriangleList()

Returns

Type	Description
Vec6f[]	Output vector.

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GetVertex(Int32, out Int32)

Returns vertex location from vertex ID.

Declaration

public Point2f GetVertex(int vertex, out int firstEdge)

Parameters

Type	Name	Description
System.Int32	vertex	vertex ID.
System.Int32	firstEdge	The first edge ID which is connected to the vertex.

Returns

Type	Description
OpenCvSharp.Point2f	vertex (x,y)

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GetVoronoiFacetList(Nullable<IEnumerable<Int32>>, out Point2f[][], out Point2f[])

Returns a list of all Voronoi facets.

Declaration

public void GetVoronoiFacetList(IEnumerable<int>? idx, out Point2f[][] facetList, out Point2f[] facetCenters)

Parameters

Type	Name	Description
System.Nullable<IEnumerable<System.Int32>>	idx	Vector of vertices IDs to consider. For all vertices you can pass empty vector.
OpenCvSharp.Point2f[][]	facetList	Output vector of the Voronoi facets.
OpenCvSharp.Point2f[]	facetCenters	Output vector of the Voronoi facets center points.

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InitDelaunay(Rect)

Creates a new empty Delaunay subdivision

Declaration

public void InitDelaunay(Rect rect)

Parameters

Type	Name	Description
OpenCvSharp.Rect	rect	Rectangle that includes all of the 2D points that are to be added to the subdivision.

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Insert(IEnumerable<Point2f>)

Insert multiple points into a Delaunay triangulation.

Declaration

public void Insert(IEnumerable<Point2f> ptVec)

Parameters

Type	Name	Description
IEnumerable<OpenCvSharp.Point2f>	ptVec	Points to insert.

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Insert(Point2f)

Insert a single point into a Delaunay triangulation.

Declaration

public int Insert(Point2f pt)

Parameters

Type	Name	Description
OpenCvSharp.Point2f	pt	Point to insert.

Returns

Type	Description
System.Int32

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Locate(Point2f, out Int32, out Int32)

Returns the location of a point within a Delaunay triangulation.

Declaration

public int Locate(Point2f pt, out int edge, out int vertex)

Parameters

Type	Name	Description
OpenCvSharp.Point2f	pt	Point to locate.
System.Int32	edge	Output edge that the point belongs to or is located to the right of it.
System.Int32	vertex	Optional output vertex the input point coincides with.

Returns

Type	Description
System.Int32	an integer which specify one of the following five cases for point location: The point falls into some facet. The function returns #PTLOC_INSIDE and edge will contain one of edges of the facet. The point falls onto the edge. The function returns #PTLOC_ON_EDGE and edge will contain this edge. The point coincides with one of the subdivision vertices. The function returns #PTLOC_VERTEX and vertex will contain a pointer to the vertex. The point is outside the subdivision reference rectangle. The function returns #PTLOC_OUTSIDE_RECT and no pointers are filled. One of input arguments is invalid. A runtime error is raised or, if silent or "parent" error processing mode is selected, #PTLOC_ERROR is returned.

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NextEdge(Int32)

Subdivision edge ID.

Declaration

public int NextEdge(int edge)

Parameters

Type	Name	Description
System.Int32	edge	Subdivision edge ID.

Returns

Type	Description
System.Int32	an integer which is next edge ID around the edge origin: eOnext on the picture above if e is the input edge).

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Release()

Clean up any resources being used.

Declaration

public void Release()

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RotateEdge(Int32, Int32)

Returns another edge of the same quad-edge.

Declaration

public int RotateEdge(int edge, int rotate)

Parameters

Type	Name	Description
System.Int32	edge	Subdivision edge ID.
System.Int32	rotate	Parameter specifying which of the edges of the same quad-edge as the input one to return. The following values are possible: 0 - the input edge ( e on the picture below if e is the input edge) 1 - the rotated edge ( eRot ) 2 - the reversed edge (reversed e (in green)) 3 - the reversed rotated edge (reversed eRot (in green))

Returns

Type	Description
System.Int32	one of the edges ID of the same quad-edge as the input edge.

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SymEdge(Int32)

Declaration

public int SymEdge(int edge)

Parameters

Type	Name	Description
System.Int32	edge

Returns

Type	Description
System.Int32

Implements

ICvPtrHolder