GEOS
3.9.0dev

Uses Snap Rounding to compute a rounded, fully noded arrangement from a set of SegmentStrings. More...
#include <SimpleSnapRounder.h>
Public Member Functions  
SimpleSnapRounder (const geom::PrecisionModel &newPm)  
std::vector< SegmentString * > *  getNodedSubstrings () const override 
Returns a collection of fully noded SegmentStrings. The SegmentStrings have the same context as their parent. More...  
void  computeNodes (std::vector< SegmentString * > *inputSegmentStrings) override 
Computes the noding for a collection of SegmentStrings. More...  
void  add (const SegmentString *segStr) 
void  computeVertexSnaps (const std::vector< SegmentString * > &edges) 
Uses Snap Rounding to compute a rounded, fully noded arrangement from a set of SegmentStrings.
Implements the Snap Rounding technique described in Hobby, Guibas & Marimont, and Goodrich et al. Snap Rounding assumes that all vertices lie on a uniform grid (hence the precision model of the input must be fixed precision, and all the input vertices must be rounded to that precision).
This implementation uses simple iteration over the line segments.
This implementation appears to be fully robust using an integer precision model. It will function with noninteger precision models, but the results are not 100% guaranteed to be correctly noded.

overridevirtual 
Computes the noding for a collection of SegmentStrings.
Some Noders may add all these nodes to the input SegmentStrings; others may only add some or none at all.
segStrings  a collection of SegmentStrings to node 
Implements geos::noding::Noder.
void geos::noding::snapround::SimpleSnapRounder::computeVertexSnaps  (  const std::vector< SegmentString * > &  edges  ) 
Computes nodes introduced as a result of snapping segments to vertices of other segments
edges  the list of segment strings to snap together. Must be NodedSegmentString or an assertion will fail. 

overridevirtual 
Returns a collection of fully noded SegmentStrings. The SegmentStrings have the same context as their parent.
Implements geos::noding::Noder.