20 #ifndef GEOS_ALGORITHM_CONSTRUCT_LARGESTCIRCLE_H
21 #define GEOS_ALGORITHM_CONSTRUCT_LARGESTCIRCLE_H
23 #include <geos/geom/Coordinate.h>
24 #include <geos/geom/Point.h>
25 #include <geos/geom/Envelope.h>
26 #include <geos/algorithm/locate/IndexedPointInAreaLocator.h>
27 #include <geos/operation/distance/IndexedFacetDistance.h>
39 class GeometryFactory;
94 std::unique_ptr<geom::Point> getCenter();
95 std::unique_ptr<geom::Point> getRadiusPoint();
96 std::unique_ptr<geom::LineString> getRadiusLine();
105 std::unique_ptr<geom::Geometry> boundary;
108 std::unique_ptr<algorithm::locate::IndexedPointInAreaLocator> ptLocator;
109 std::unique_ptr<operation::distance::IndexedFacetDistance> boundaryDistance;
127 double distanceToConstraints(
double x,
double y);
133 static constexpr
double SQRT2 = 1.4142135623730951;
141 Cell(
double p_x,
double p_y,
double p_hSize,
double p_distanceToConstraints)
145 , distance(p_distanceToConstraints)
146 , maxDist(p_distanceToConstraints + (p_hSize*SQRT2))
155 bool isFullyOutside()
const
157 return maxDist < 0.0;
159 bool isOutside()
const
161 return distance < 0.0;
163 double getMaxDistance()
const
167 double getDistance()
const
171 double getHSize()
const
183 bool operator< (
const Cell& rhs)
const
185 return maxDist < rhs.maxDist;
187 bool operator> (
const Cell& rhs)
const
189 return maxDist > rhs.maxDist;
193 return maxDist == rhs.maxDist;
197 bool mayContainCircleCenter(
const Cell& cell,
const Cell& farthestCell);
198 void createInitialGrid(
const geom::Envelope* env, std::priority_queue<Cell>& cellQueue);
199 Cell createCentroidCell(
const geom::Geometry* geom);
Definition: LargestEmptyCircle.h:60
static std::unique_ptr< geom::Point > getCenter(const geom::Geometry *p_obstacles, double p_tolerance)
static std::unique_ptr< geom::LineString > getRadiusLine(const geom::Geometry *p_obstacles, double p_tolerance)
LargestEmptyCircle(const geom::Geometry *p_obstacles, double p_tolerance)
Coordinate is the lightweight class used to store coordinates.
Definition: Coordinate.h:60
An Envelope defines a rectangulare region of the 2D coordinate plane.
Definition: Envelope.h:58
Supplies a set of utility methods for building Geometry objects from CoordinateSequence or other Geom...
Definition: GeometryFactory.h:68
Basic implementation of Geometry, constructed and destructed by GeometryFactory.
Definition: Geometry.h:188
Computes the distance between the facets (segments and vertices) of two Geometrys using a Branch-and-...
Definition: IndexedFacetDistance.h:47
bool operator==(const Coordinate &a, const Coordinate &b)
Equality operator for Coordinate. 2D only.
Basic namespace for all GEOS functionalities.
Definition: IndexedNestedRingTester.h:26