GEOS  3.9.0dev
Public Member Functions | Static Public Member Functions | List of all members
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

Public Member Functions

 NodedSegmentString (geom::CoordinateSequence *newPts, const void *newContext)
 Creates a new segment string from a list of vertices. More...
 
SegmentNodeaddIntersectionNode (geom::Coordinate *intPt, std::size_t segmentIndex)
 Adds an intersection node for a given point and segment to this segment string. More...
 
SegmentNodeListgetNodeList ()
 
const SegmentNodeListgetNodeList () const
 
size_t size () const override
 
const geom::CoordinategetCoordinate (size_t i) const override
 
geom::CoordinateSequencegetCoordinates () const override
 Return a pointer to the CoordinateSequence associated with this SegmentString. More...
 
bool isClosed () const override
 
std::ostream & print (std::ostream &os) const override
 
int getSegmentOctant (size_t index) const
 Gets the octant of the segment starting at vertex index. More...
 
void addIntersections (algorithm::LineIntersector *li, size_t segmentIndex, size_t geomIndex)
 Add SegmentNodes for one or both intersections found for a segment of an edge to the edge intersection list.
 
void addIntersection (algorithm::LineIntersector *li, size_t segmentIndex, size_t geomIndex, size_t intIndex)
 Add an SegmentNode for intersection intIndex. More...
 
void addIntersection (const geom::Coordinate &intPt, size_t segmentIndex)
 Add an SegmentNode for intersection intIndex. More...
 
- Public Member Functions inherited from geos::noding::NodableSegmentString
 NodableSegmentString (const void *newContext)
 
- Public Member Functions inherited from geos::noding::SegmentString
 SegmentString (const void *newContext)
 Construct a SegmentString. More...
 
const void * getData () const
 Gets the user-defined data for this segment string. More...
 
void setData (const void *data)
 Sets the user-defined data for this segment string. More...
 

Static Public Member Functions

template<class II >
static void getNodedSubstrings (II from, II too_far, SegmentString::NonConstVect *resultEdgelist)
 
template<class C >
static void getNodedSubstrings (C *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.
 

Additional Inherited Members

- Public Types inherited from geos::noding::SegmentString
typedef std::vector< const
SegmentString * > 
ConstVect
 
typedef std::vector
< SegmentString * > 
NonConstVect
 

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
newPtsCoordinateSequence representing the string, ownership transferred.
newContextthe user-defined data of this segment string (may be null)

Member Function Documentation

void geos::noding::NodedSegmentString::addIntersection ( algorithm::LineIntersector li,
size_t  segmentIndex,
size_t  geomIndex,
size_t  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,
size_t  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,
std::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
intPtthe location of the intersection
segmentIndexthe index of the segment containing the intersection
Returns
the intersection node for the point
geom::CoordinateSequence* geos::noding::NodedSegmentString::getCoordinates ( ) const
overridevirtual

Return a pointer to the CoordinateSequence associated with this SegmentString.

Note
The CoordinateSequence is owned by this SegmentString!

Implements geos::noding::SegmentString.

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

Gets the octant of the segment starting at vertex index.

Parameters
indexthe 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: