com.vividsolutions.jts.noding

Class ScaledNoder

java.lang.Object

com.vividsolutions.jts.noding.ScaledNoder

All Implemented Interfaces:

Noder

public class ScaledNoder
extends Object
implements Noder

Wraps a Noder and transforms its input into the integer domain. This is intended for use with Snap-Rounding noders, which typically are only intended to work in the integer domain. Offsets can be provided to increase the number of digits of available precision.

Clients should be aware that rescaling can involve loss of precision, which can cause zero-length line segments to be created. These in turn can cause problems when used to build a planar graph. This situation should be checked for and collapsed segments removed if necessary.

Version:

1.7

Constructor Summary

Constructors

Constructor and Description
ScaledNoder(Noder noder, double scaleFactor)
ScaledNoder(Noder noder, double scaleFactor, double offsetX, double offsetY)

Method Summary

Modifier and Type	Method and Description
void	computeNodes(Collection inputSegStrings) Computes the noding for a collection of SegmentStrings.
Collection	getNodedSubstrings() Returns a Collection of fully noded SegmentStrings.
boolean	isIntegerPrecision()

Methods inherited from class java.lang.Object

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

Constructor Detail

ScaledNoder

public ScaledNoder(Noder noder,
                   double scaleFactor)

ScaledNoder

public ScaledNoder(Noder noder,
                   double scaleFactor,
                   double offsetX,
                   double offsetY)

Method Detail

isIntegerPrecision

public boolean isIntegerPrecision()

getNodedSubstrings

public Collection getNodedSubstrings()

Description copied from interface: Noder

Returns a Collection of fully noded SegmentStrings. The SegmentStrings have the same context as their parent.

Specified by:

getNodedSubstrings in interface Noder

Returns:

a Collection of SegmentStrings

computeNodes

public void computeNodes(Collection inputSegStrings)

Description copied from interface: Noder

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.

Specified by:

computeNodes in interface Noder

Parameters:

inputSegStrings - a collection of SegmentStrings to node