GEOS 3.13.1
geos::operation::overlayng::OverlayMixedPoints Class Reference

#include <OverlayMixedPoints.h>

Public Member Functions

 OverlayMixedPoints (int p_opCode, const Geometry *geom0, const Geometry *geom1, const PrecisionModel *p_pm)
std::unique_ptr< GeometrygetResult ()

Static Public Member Functions

static std::unique_ptr< Geometryoverlay (int opCode, const Geometry *geom0, const Geometry *geom1, const PrecisionModel *pm)

Detailed Description

Computes an overlay where one input is Point(s) and one is not. This class supports overlay being used as an efficient way to find points within or outside a polygon.

Input semantics are:

  • Duplicates are removed from Point output
  • Non-point output is rounded and noded using the given precision model

Output semantics are:

  • An empty result is an empty atomic geometry with dimension determined by the inputs and the operation, as per overlay semantics

For efficiency the following optimizations are used:

  • Input points are not included in the noding of the non-point input geometry (in particular, they do not participate in snap-rounding if that is used).
  • If the non-point input geometry is not included in the output it is not rounded and noded. This means that points are compared to the non-rounded geometry. This will be apparent in the result.
Author
Martin Davis

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