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:

List of all members.

Public Member Functions
	NodedSegmentString (geom::CoordinateSequence *newPts, const void *newContext)
SegmentNode *	addIntersectionNode (geom::Coordinate *intPt, size_t segmentIndex)
SegmentNodeList &	getNodeList ()
const SegmentNodeList &	getNodeList () const
virtual unsigned int	size () const
virtual const geom::Coordinate &	getCoordinate (unsigned int i) const
virtual geom::CoordinateSequence *	getCoordinates () 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.

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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.

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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)

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Member Function Documentation

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

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

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

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

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

• NodedSegmentString.h

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