Package org.opencv.imgproc
Class Subdiv2D
- java.lang.Object
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- org.opencv.imgproc.Subdiv2D
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public class Subdiv2D extends java.lang.Object
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Field Summary
Fields Modifier and Type Field Description protected long
nativeObj
static int
NEXT_AROUND_DST
static int
NEXT_AROUND_LEFT
static int
NEXT_AROUND_ORG
static int
NEXT_AROUND_RIGHT
static int
PREV_AROUND_DST
static int
PREV_AROUND_LEFT
static int
PREV_AROUND_ORG
static int
PREV_AROUND_RIGHT
static int
PTLOC_ERROR
static int
PTLOC_INSIDE
static int
PTLOC_ON_EDGE
static int
PTLOC_OUTSIDE_RECT
static int
PTLOC_VERTEX
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description static Subdiv2D
__fromPtr__(long addr)
int
edgeDst(int edge)
Returns the edge destination.int
edgeDst(int edge, Point dstpt)
Returns the edge destination.int
edgeOrg(int edge)
Returns the edge origin.int
edgeOrg(int edge, Point orgpt)
Returns the edge origin.protected void
finalize()
int
findNearest(Point pt)
Finds the subdivision vertex closest to the given point.int
findNearest(Point pt, Point nearestPt)
Finds the subdivision vertex closest to the given point.int
getEdge(int edge, int nextEdgeType)
Returns one of the edges related to the given edge.void
getEdgeList(MatOfFloat4 edgeList)
Returns a list of all edges.void
getLeadingEdgeList(MatOfInt leadingEdgeList)
Returns a list of the leading edge ID connected to each triangle.long
getNativeObjAddr()
void
getTriangleList(MatOfFloat6 triangleList)
Returns a list of all triangles.Point
getVertex(int vertex)
Returns vertex location from vertex ID.Point
getVertex(int vertex, int[] firstEdge)
Returns vertex location from vertex ID.void
getVoronoiFacetList(MatOfInt idx, java.util.List<MatOfPoint2f> facetList, MatOfPoint2f facetCenters)
Returns a list of all Voronoi facets.void
initDelaunay(Rect rect)
Creates a new empty Delaunay subdivisionvoid
insert(MatOfPoint2f ptvec)
Insert multiple points into a Delaunay triangulation.int
insert(Point pt)
Insert a single point into a Delaunay triangulation.int
locate(Point pt, int[] edge, int[] vertex)
Returns the location of a point within a Delaunay triangulation.int
nextEdge(int edge)
Returns next edge around the edge origin.int
rotateEdge(int edge, int rotate)
Returns another edge of the same quad-edge.int
symEdge(int edge)
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Field Detail
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nativeObj
protected final long nativeObj
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PTLOC_ERROR
public static final int PTLOC_ERROR
- See Also:
- Constant Field Values
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PTLOC_OUTSIDE_RECT
public static final int PTLOC_OUTSIDE_RECT
- See Also:
- Constant Field Values
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PTLOC_INSIDE
public static final int PTLOC_INSIDE
- See Also:
- Constant Field Values
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PTLOC_VERTEX
public static final int PTLOC_VERTEX
- See Also:
- Constant Field Values
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PTLOC_ON_EDGE
public static final int PTLOC_ON_EDGE
- See Also:
- Constant Field Values
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NEXT_AROUND_ORG
public static final int NEXT_AROUND_ORG
- See Also:
- Constant Field Values
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NEXT_AROUND_DST
public static final int NEXT_AROUND_DST
- See Also:
- Constant Field Values
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PREV_AROUND_ORG
public static final int PREV_AROUND_ORG
- See Also:
- Constant Field Values
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PREV_AROUND_DST
public static final int PREV_AROUND_DST
- See Also:
- Constant Field Values
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NEXT_AROUND_LEFT
public static final int NEXT_AROUND_LEFT
- See Also:
- Constant Field Values
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NEXT_AROUND_RIGHT
public static final int NEXT_AROUND_RIGHT
- See Also:
- Constant Field Values
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PREV_AROUND_LEFT
public static final int PREV_AROUND_LEFT
- See Also:
- Constant Field Values
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PREV_AROUND_RIGHT
public static final int PREV_AROUND_RIGHT
- See Also:
- Constant Field Values
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Constructor Detail
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Subdiv2D
protected Subdiv2D(long addr)
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Subdiv2D
public Subdiv2D()
creates an empty Subdiv2D object. To create a new empty Delaunay subdivision you need to use the #initDelaunay function.
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Subdiv2D
public Subdiv2D(Rect rect)
- Parameters:
rect
- Rectangle that includes all of the 2D points that are to be added to the subdivision. The function creates an empty Delaunay subdivision where 2D points can be added using the function insert() . All of the points to be added must be within the specified rectangle, otherwise a runtime error is raised.
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Method Detail
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getNativeObjAddr
public long getNativeObjAddr()
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__fromPtr__
public static Subdiv2D __fromPtr__(long addr)
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initDelaunay
public void initDelaunay(Rect rect)
Creates a new empty Delaunay subdivision- Parameters:
rect
- Rectangle that includes all of the 2D points that are to be added to the subdivision.
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insert
public int insert(Point pt)
Insert a single point into a Delaunay triangulation.- Parameters:
pt
- Point to insert. The function inserts a single point into a subdivision and modifies the subdivision topology appropriately. If a point with the same coordinates exists already, no new point is added.- Returns:
- the ID of the point. Note: If the point is outside of the triangulation specified rect a runtime error is raised.
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insert
public void insert(MatOfPoint2f ptvec)
Insert multiple points into a Delaunay triangulation.- Parameters:
ptvec
- Points to insert. The function inserts a vector of points into a subdivision and modifies the subdivision topology appropriately.
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locate
public int locate(Point pt, int[] edge, int[] vertex)
Returns the location of a point within a Delaunay triangulation.- Parameters:
pt
- Point to locate.edge
- Output edge that the point belongs to or is located to the right of it.vertex
- Optional output vertex the input point coincides with. The function locates the input point within the subdivision and gives one of the triangle edges or vertices.- Returns:
- 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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findNearest
public int findNearest(Point pt, Point nearestPt)
Finds the subdivision vertex closest to the given point.- Parameters:
pt
- Input point.nearestPt
- Output subdivision vertex point. The function is another function that locates the input point within the subdivision. It finds the subdivision vertex that is the closest to the input point. It is not necessarily one of vertices of the facet containing the input point, though the facet (located using locate() ) is used as a starting point.- Returns:
- vertex ID.
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findNearest
public int findNearest(Point pt)
Finds the subdivision vertex closest to the given point.- Parameters:
pt
- Input point. The function is another function that locates the input point within the subdivision. It finds the subdivision vertex that is the closest to the input point. It is not necessarily one of vertices of the facet containing the input point, though the facet (located using locate() ) is used as a starting point.- Returns:
- vertex ID.
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getEdgeList
public void getEdgeList(MatOfFloat4 edgeList)
Returns a list of all edges.- Parameters:
edgeList
- Output vector. The function gives each edge as a 4 numbers vector, where each two are one of the edge vertices. i.e. org_x = v[0], org_y = v[1], dst_x = v[2], dst_y = v[3].
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getLeadingEdgeList
public void getLeadingEdgeList(MatOfInt leadingEdgeList)
Returns a list of the leading edge ID connected to each triangle.- Parameters:
leadingEdgeList
- Output vector. The function gives one edge ID for each triangle.
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getTriangleList
public void getTriangleList(MatOfFloat6 triangleList)
Returns a list of all triangles.- Parameters:
triangleList
- Output vector. The function gives each triangle as a 6 numbers vector, where each two are one of the triangle vertices. i.e. p1_x = v[0], p1_y = v[1], p2_x = v[2], p2_y = v[3], p3_x = v[4], p3_y = v[5].
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getVoronoiFacetList
public void getVoronoiFacetList(MatOfInt idx, java.util.List<MatOfPoint2f> facetList, MatOfPoint2f facetCenters)
Returns a list of all Voronoi facets.- Parameters:
idx
- Vector of vertices IDs to consider. For all vertices you can pass empty vector.facetList
- Output vector of the Voronoi facets.facetCenters
- Output vector of the Voronoi facets center points.
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getVertex
public Point getVertex(int vertex, int[] firstEdge)
Returns vertex location from vertex ID.- Parameters:
vertex
- vertex ID.firstEdge
- Optional. The first edge ID which is connected to the vertex.- Returns:
- vertex (x,y)
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getVertex
public Point getVertex(int vertex)
Returns vertex location from vertex ID.- Parameters:
vertex
- vertex ID.- Returns:
- vertex (x,y)
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getEdge
public int getEdge(int edge, int nextEdgeType)
Returns one of the edges related to the given edge.- Parameters:
edge
- Subdivision edge ID.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:
- edge ID related to the input edge.
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nextEdge
public int nextEdge(int edge)
Returns next edge around the edge origin.- Parameters:
edge
- Subdivision edge ID.- Returns:
- 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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rotateEdge
public int rotateEdge(int edge, int rotate)
Returns another edge of the same quad-edge.- Parameters:
edge
- Subdivision edge ID.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:
- one of the edges ID of the same quad-edge as the input edge.
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symEdge
public int symEdge(int edge)
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edgeOrg
public int edgeOrg(int edge, Point orgpt)
Returns the edge origin.- Parameters:
edge
- Subdivision edge ID.orgpt
- Output vertex location.- Returns:
- vertex ID.
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edgeOrg
public int edgeOrg(int edge)
Returns the edge origin.- Parameters:
edge
- Subdivision edge ID.- Returns:
- vertex ID.
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edgeDst
public int edgeDst(int edge, Point dstpt)
Returns the edge destination.- Parameters:
edge
- Subdivision edge ID.dstpt
- Output vertex location.- Returns:
- vertex ID.
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edgeDst
public int edgeDst(int edge)
Returns the edge destination.- Parameters:
edge
- Subdivision edge ID.- Returns:
- vertex ID.
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finalize
protected void finalize() throws java.lang.Throwable
- Overrides:
finalize
in classjava.lang.Object
- Throws:
java.lang.Throwable
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