Package org.locationtech.jts.densify

Class Densifier.DensifyTransformer

java.lang.Object

org.locationtech.jts.geom.util.GeometryTransformer

org.locationtech.jts.densify.Densifier.DensifyTransformer

Enclosing class:

Densifier

static class Densifier.DensifyTransformer
extends GeometryTransformer

Field Summary

Fields

Modifier and Type	Field	Description
(package private) double	distanceTolerance

Fields inherited from class org.locationtech.jts.geom.util.GeometryTransformer

factory

Constructor Summary

Constructors

Constructor	Description
DensifyTransformer(double distanceTolerance)

Method Summary

Modifier and Type	Method	Description
private Geometry	createValidArea(Geometry roughAreaGeom)	Creates a valid area geometry from one that possibly has bad topology (i.e.
protected CoordinateSequence	transformCoordinates(CoordinateSequence coords, Geometry parent)	Transforms a CoordinateSequence.
protected Geometry	transformMultiPolygon(MultiPolygon geom, Geometry parent)
protected Geometry	transformPolygon(Polygon geom, Geometry parent)

Methods inherited from class org.locationtech.jts.geom.util.GeometryTransformer

copy, createCoordinateSequence, getInputGeometry, transform, transformGeometryCollection, transformLinearRing, transformLineString, transformMultiLineString, transformMultiPoint, transformPoint

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

distanceTolerance

double distanceTolerance

Constructor Detail

DensifyTransformer

DensifyTransformer(double distanceTolerance)

Method Detail

transformCoordinates

protected CoordinateSequence transformCoordinates(CoordinateSequence coords,
                                                  Geometry parent)

Description copied from class: GeometryTransformer

Transforms a CoordinateSequence. This method should always return a valid coordinate list for the desired result type. (E.g. a coordinate list for a LineString must have 0 or at least 2 points). If this is not possible, return an empty sequence - this will be pruned out.

Overrides:

transformCoordinates in class GeometryTransformer

Parameters:

coords - the coordinates to transform

parent - the parent geometry

Returns:

the transformed coordinates

transformPolygon

protected Geometry transformPolygon(Polygon geom,
                                    Geometry parent)

Overrides:

transformPolygon in class GeometryTransformer

transformMultiPolygon

protected Geometry transformMultiPolygon(MultiPolygon geom,
                                         Geometry parent)

Overrides:

transformMultiPolygon in class GeometryTransformer

createValidArea

private Geometry createValidArea(Geometry roughAreaGeom)

Creates a valid area geometry from one that possibly has bad topology (i.e. self-intersections). Since buffer can handle invalid topology, but always returns valid geometry, constructing a 0-width buffer "corrects" the topology. Note this only works for area geometries, since buffer always returns areas. This also may return empty geometries, if the input has no actual area.

Parameters:

roughAreaGeom - an area geometry possibly containing self-intersections

Returns:

a valid area geometry