Public Member Functions | Static Public Member Functions

geos::noding::NodedSegmentString Class Reference

Represents a list of contiguous line segments, and supports noding the segments. More...

#include <NodedSegmentString.h>

Inheritance diagram for geos::noding::NodedSegmentString:
geos::noding::NodableSegmentString geos::noding::SegmentString

List of all members.

Public Member Functions

 NodedSegmentString (geom::CoordinateSequence *newPts, const void *newContext)
SegmentNodeaddIntersectionNode (geom::Coordinate *intPt, size_t segmentIndex)
SegmentNodeListgetNodeList ()
const SegmentNodeListgetNodeList () const
virtual unsigned int size () const
virtual const geom::CoordinategetCoordinate (unsigned int i) const
virtual geom::CoordinateSequencegetCoordinates () const
 Return a pointer to the CoordinateSequence associated with this SegmentString.
virtual bool isClosed () const
virtual std::ostream & print (std::ostream &os) const
int getSegmentOctant (unsigned int index) const
 Gets the octant of the segment starting at vertex index.
void addIntersections (algorithm::LineIntersector *li, unsigned int segmentIndex, int geomIndex)
 Add {SegmentNode}s for one or both intersections found for a segment of an edge to the edge intersection list.
void addIntersection (algorithm::LineIntersector *li, unsigned int segmentIndex, int geomIndex, int intIndex)
 Add an SegmentNode for intersection intIndex.
void addIntersection (const geom::Coordinate &intPt, unsigned int segmentIndex)
 Add an SegmentNode for intersection intIndex.

Static Public Member Functions

static void getNodedSubstrings (SegmentString::ConstVect *segStrings, SegmentString::NonConstVect *resultEdgelist)
static void getNodedSubstrings (const SegmentString::NonConstVect &segStrings, SegmentString::NonConstVect *resultEdgeList)
static
SegmentString::NonConstVect * 
getNodedSubstrings (const SegmentString::NonConstVect &segStrings)
 Returns allocated object.

Detailed Description

Represents a list of contiguous line segments, and supports noding the segments.

The line segments are represented by an array of Coordinates. Intended to optimize the noding of contiguous segments by reducing the number of allocated objects. SegmentStrings can carry a context object, which is useful for preserving topological or parentage information. All noded substrings are initialized with the same context object.


Constructor & Destructor Documentation

geos::noding::NodedSegmentString::NodedSegmentString ( geom::CoordinateSequence newPts,
const void *  newContext 
) [inline]

Creates a new segment string from a list of vertices.

Parameters:
newPts CoordinateSequence representing the string, externally owned
data the user-defined data of this segment string (may be null)

Member Function Documentation

void geos::noding::NodedSegmentString::addIntersection ( algorithm::LineIntersector li,
unsigned int  segmentIndex,
int  geomIndex,
int  intIndex 
)

Add an SegmentNode for intersection intIndex.

An intersection that falls exactly on a vertex of the SegmentString is normalized to use the higher of the two possible segmentIndexes

void geos::noding::NodedSegmentString::addIntersection ( const geom::Coordinate intPt,
unsigned int  segmentIndex 
)

Add an SegmentNode for intersection intIndex.

An intersection that falls exactly on a vertex of the edge is normalized to use the higher of the two possible segmentIndexes

SegmentNode* geos::noding::NodedSegmentString::addIntersectionNode ( geom::Coordinate intPt,
size_t  segmentIndex 
) [inline]

Adds an intersection node for a given point and segment to this segment string. If an intersection already exists for this exact location, the existing node will be returned.

Parameters:
intPt the location of the intersection
segmentIndex the index of the segment containing the intersection
Returns:
the intersection node for the point

References geos::noding::SegmentNodeList::add().

virtual geom::CoordinateSequence* geos::noding::NodedSegmentString::getCoordinates (  )  const [virtual]

Return a pointer to the CoordinateSequence associated with this SegmentString.

Note that the CoordinateSequence is not owned by this SegmentString!

Implements geos::noding::SegmentString.

int geos::noding::NodedSegmentString::getSegmentOctant ( unsigned int  index  )  const

Gets the octant of the segment starting at vertex index.

Parameters:
index the index of the vertex starting the segment. Must not be the last index in the vertex list
Returns:
the octant of the segment at the vertex

The documentation for this class was generated from the following file: