Class OverlayNGOptFunctions

java.lang.Object

org.locationtech.jtstest.function.OverlayNGOptFunctions

public class OverlayNGOptFunctions
extends Object

Functions to test using spatial predicates as a filter in front of overlay operations to optimize performance.

Author:

Martin Davis

Constructor Summary

Constructors

Constructor	Description
OverlayNGOptFunctions()

Method Summary

Modifier and Type	Method	Description
static Geometry	difference(Geometry a, Geometry b)
static Geometry	intersection(Geometry a, Geometry b)
static Geometry	intersectionOrigClassic(Geometry a, Geometry b)	Use spatial predicates as a filter in front of intersection.
static Geometry	intersectionOrigPrep(Geometry a, Geometry b)	Use prepared geometry spatial predicates as a filter in front of intersection, with the first operand prepared.
static Geometry	intersectionOrigPrepNoCache(Geometry a, Geometry b)
static Geometry	intersectionPrep(Geometry a, Geometry b)	Using auto slows things down quite a bit (due to need to scan to find scale factor), so not recommended.
static Geometry	intersectionPrepNoCache(Geometry a, Geometry b)
static Geometry	intersectionPrepSR(Geometry a, Geometry b, double scaleFactor)
static Geometry	intersectionSR(Geometry a, Geometry b, double scaleFactor)

Methods inherited from class Object

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

Constructor Details

OverlayNGOptFunctions

public OverlayNGOptFunctions()

Method Details

intersectionOrigClassic

public static Geometry intersectionOrigClassic(Geometry a,
 Geometry b)

Use spatial predicates as a filter in front of intersection.

Parameters:

a - a geometry

b - a geometry

Returns:

the intersection of the geometries

intersectionOrigPrep

public static Geometry intersectionOrigPrep(Geometry a,
 Geometry b)

Use prepared geometry spatial predicates as a filter in front of intersection, with the first operand prepared.

Parameters:

a - a geometry to prepare

b - a geometry

Returns:

the intersection of the geometries

intersectionOrigPrepNoCache

public static Geometry intersectionOrigPrepNoCache(Geometry a,
 Geometry b)

intersectionSR

public static Geometry intersectionSR(Geometry a,
 Geometry b,
 double scaleFactor)

intersectionPrepSR

public static Geometry intersectionPrepSR(Geometry a,
 Geometry b,
 double scaleFactor)

difference

public static Geometry difference(Geometry a,
 Geometry b)

intersection

public static Geometry intersection(Geometry a,
 Geometry b)

intersectionPrep

public static Geometry intersectionPrep(Geometry a,
 Geometry b)

Using auto slows things down quite a bit (due to need to scan to find scale factor), so not recommended.

Parameters:

a -

b -

Returns:

intersectionPrepNoCache

public static Geometry intersectionPrepNoCache(Geometry a,
 Geometry b)