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com.trapezium.attractor
Class AttractorReductionAlgorithm  

java.lang.Object
  com.trapezium.attractor.AttractorReductionAlgorithm

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public class AttractorReductionAlgorithm

extends java.lang.Object

The attractor based polygon reduction algorithm.

Since:

1.0

Version:

1.0, 7 Oct 1998

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Field Summary
(package private)  boolean	attractorNeedsInit
(package private)  boolean	attractorNeedsRescale
(package private)  com.trapezium.space.SpaceStructure	attractorSpaceStructure
(package private)  com.trapezium.space.SpaceEntitySet	attractorVertices
(package private)  com.trapezium.space.SpaceStructure	dualSpaceStructure
(package private)  com.trapezium.space.SpaceEntitySet	dualVertices
(package private)  CoordAttractor	farCoords
(package private)  boolean	floaterNeedsInit
(package private)  com.trapezium.space.SpaceStructure	floaterSpaceStructure
(package private)  com.trapezium.space.SpaceEntitySet	floaterVertices
(package private)  CoordAttractor	magicAttractor
(package private)  com.trapezium.space.SpaceEntitySet	magicCoords
(package private)  CoordAttractor	nearCoords
(package private)  int[]	newToOldMapping
(package private)  int	numberAttractorVertices
(package private)  int	numberDualVertices
(package private)  int	numberFloaterVertices
(package private)  java.util.BitSet	preservedFloaterVertices

 

Constructor Summary

AttractorReductionAlgorithm()           Class constructor

 

Method Summary
(package private)  void	createMagicCoords()           Create the set of coordinates in the floater that all other coordinates map to during the reduction.
java.util.Enumeration	enumerateFaces()           Enumerate structures which can be used to generate coordIndex of the reduced face set.
com.trapezium.space.SpaceEntitySet	getFloaterVertices()           Get the reduced vertices, which is really the original floater set.
com.trapezium.space.SpaceEntitySet	getNewCoords()           Get the new coordinate results
int[]	getNewToOldMapping()           Get mapping between magic coords and original offsets
com.trapezium.space.SpaceStructure	getOriginal()           Get the original SpaceStructure
java.util.BitSet	getPreservedFloaters()           Get the BitSet indicating which original coordinates are preserved
(package private)  void	initAttractorFields()           Extracts and generates all the attractor based fields required by the algorithm.
(package private)  void	initFloaterFields()           initialize all the fields associated with the floater
void	reduce()           The main algorithm, requires the attractor and floater already be set by setAttractor and setOriginal.
(package private)  void	rescaleAttractor()           rescale the attractor so its bounding box is same as floater
void	setAttractor(com.trapezium.space.SpaceStructure attractor)           The attractor reduction algorithm requires one SpaceStructure to function as the attractor, and one SpaceStructure to be reduced (called the floater).
void	setOriginal(com.trapezium.space.SpaceStructure floater)           The attractor reduction algorithm requires one SpaceStructure to function as the attractor, and one SpaceStructure to be reduced (called the floater).

 

Methods inherited from class java.lang.Object

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

 

Field Detail

attractorNeedsInit

boolean attractorNeedsInit

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attractorNeedsRescale

boolean attractorNeedsRescale

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attractorSpaceStructure

com.trapezium.space.SpaceStructure attractorSpaceStructure

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attractorVertices

com.trapezium.space.SpaceEntitySet attractorVertices

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numberAttractorVertices

int numberAttractorVertices

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dualSpaceStructure

com.trapezium.space.SpaceStructure dualSpaceStructure

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dualVertices

com.trapezium.space.SpaceEntitySet dualVertices

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numberDualVertices

int numberDualVertices

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floaterNeedsInit

boolean floaterNeedsInit

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floaterSpaceStructure

com.trapezium.space.SpaceStructure floaterSpaceStructure

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floaterVertices

com.trapezium.space.SpaceEntitySet floaterVertices

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numberFloaterVertices

int numberFloaterVertices

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preservedFloaterVertices

java.util.BitSet preservedFloaterVertices

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nearCoords

CoordAttractor nearCoords

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farCoords

CoordAttractor farCoords

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magicCoords

com.trapezium.space.SpaceEntitySet magicCoords

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magicAttractor

CoordAttractor magicAttractor

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newToOldMapping

int[] newToOldMapping

Constructor Detail

AttractorReductionAlgorithm

public AttractorReductionAlgorithm()

Class constructor

Method Detail

getNewCoords

public com.trapezium.space.SpaceEntitySet getNewCoords()

Get the new coordinate results

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getNewToOldMapping

public int[] getNewToOldMapping()

Get mapping between magic coords and original offsets

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getPreservedFloaters

public java.util.BitSet getPreservedFloaters()

Get the BitSet indicating which original coordinates are preserved

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setAttractor

public void setAttractor(com.trapezium.space.SpaceStructure attractor)

The attractor reduction algorithm requires one SpaceStructure to function as the attractor, and one SpaceStructure to be reduced (called the floater). This method sets the attractor.

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setOriginal

public void setOriginal(com.trapezium.space.SpaceStructure floater)

The attractor reduction algorithm requires one SpaceStructure to function as the attractor, and one SpaceStructure to be reduced (called the floater). This method sets the floater.

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getOriginal

public com.trapezium.space.SpaceStructure getOriginal()

Get the original SpaceStructure

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reduce

public void reduce()

The main algorithm, requires the attractor and floater already be set by setAttractor and setOriginal. If these are not set the algorithm does nothing.

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enumerateFaces

public java.util.Enumeration enumerateFaces()

Enumerate structures which can be used to generate coordIndex of the reduced face set.

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getFloaterVertices

public com.trapezium.space.SpaceEntitySet getFloaterVertices()

Get the reduced vertices, which is really the original floater set. We rely on the cleaners to detect the duplicates and unused ones.

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initAttractorFields

void initAttractorFields()

Extracts and generates all the attractor based fields required by the algorithm. These fields are just the attractor and dual vertices.

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initFloaterFields

void initFloaterFields()

initialize all the fields associated with the floater

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rescaleAttractor

void rescaleAttractor()

rescale the attractor so its bounding box is same as floater

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createMagicCoords

void createMagicCoords()

Create the set of coordinates in the floater that all other coordinates map to during the reduction.

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Home >> All >> com >> trapezium >> [ attractor overview ]	PREV CLASS  NEXT CLASS
SUMMARY:  JAVADOC |  SOURCE |  DOWNLOAD | NESTED | FIELD | CONSTR | METHOD	DETAIL: FIELD | CONSTR | METHOD

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