org.shapelogic.imageprocessing
Class ChainCodeHandler

java.lang.Object
  org.shapelogic.polygon.BaseAnnotatedShape
      org.shapelogic.imageprocessing.ChainCodeHandler

All Implemented Interfaces:

Calc<MultiLine>, LazyCalc<MultiLine>, AnnotatedShape

public class ChainCodeHandler
extends BaseAnnotatedShape
implements LazyCalc<MultiLine>

Chain Code For MultiLine. Assume that there is no intersection.

Author:

Sami Badawi

Field Summary

protected int	_accumulatedAbsoluteDirectionChange
protected int	_accumulatedDirectionChange
protected BBox	_bBox
protected byte[]	_chainCodeForMultiLine
protected boolean	_dirty
protected CPointInt	_firstPoint
protected int	_lastChain
protected CPointInt	_lastPoint
protected java.util.List<LineProperties>	_linePropertiesList Line number N should have end point on point number N.
protected MultiLine	_multiLine
protected java.util.TreeMap<java.lang.Integer,CPointInt>	_pointMap
protected java.util.List<PointProperties>	_pointPropertiesList What should happen to the last point if the first and the last point is the same.
protected static int	CHAIN_CODE_FOR_MULTI_LINE_MAX_LENGTH
protected static double	LIMIT_FOR_HARD_CORNER
protected static int	SHORT_LINE_LENGTH

Fields inherited from class org.shapelogic.polygon.BaseAnnotatedShape

_annotatedShape

Constructor Summary

ChainCodeHandler(AnnotatedShapeImplementation annotatedShape)

Method Summary

void	addChainCode(byte chainCode)
MultiLine	calc()
void	findAccumulatedDirectionChange() Find the accumulated direction change, the sum of all turns.
MultiLine	getCalcValue() If dirty do calc() else return cached value.
byte[]	getChainCodeForMultiLine()
protected double	getDistLimit(int pixelCountInCurrentLineInterval) DistLimit is half based on the diameter of the polygon half on the length of the line.
CPointInt	getFirstPoint()
int	getLastChain()
CPointInt	getLastPoint()
boolean	isClosed() Last point is a running point so this will not always work.
boolean	isDirty()
void	setFirstPoint(IPoint2D firstPoint)
void	setMultiLine(MultiLine line)
void	setup()
void	swapChainCodeInOppositeDirection() Opposite Direction.

Methods inherited from class org.shapelogic.polygon.BaseAnnotatedShape

getAnnotatedShape, getAnnotationForShapes, getMap, getShapesForAnnotation, putAllAnnotation, putAnnotation

Methods inherited from class java.lang.Object

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

Field Detail

CHAIN_CODE_FOR_MULTI_LINE_MAX_LENGTH

protected static final int CHAIN_CODE_FOR_MULTI_LINE_MAX_LENGTH

See Also:

Constant Field Values

SHORT_LINE_LENGTH

protected static final int SHORT_LINE_LENGTH

See Also:

Constant Field Values

LIMIT_FOR_HARD_CORNER

protected static final double LIMIT_FOR_HARD_CORNER

See Also:

Constant Field Values

_chainCodeForMultiLine

protected byte[] _chainCodeForMultiLine

_lastChain

protected int _lastChain

_firstPoint

protected CPointInt _firstPoint

_lastPoint

protected CPointInt _lastPoint

_multiLine

protected MultiLine _multiLine

_dirty

protected boolean _dirty

_bBox

protected BBox _bBox

_pointMap

protected java.util.TreeMap<java.lang.Integer,CPointInt> _pointMap

_accumulatedDirectionChange

protected int _accumulatedDirectionChange

_accumulatedAbsoluteDirectionChange

protected int _accumulatedAbsoluteDirectionChange

_pointPropertiesList

protected java.util.List<PointProperties> _pointPropertiesList

What should happen to the last point if the first and the last point is the same. I think that there should be 2 points, in the list of points, but as far as PointProperties I think that there should only be one, maybe I could just use the same. How would that work? I could have a map Another thing is if I count the number of point in a closed multi line it will be one too many.

_linePropertiesList

protected java.util.List<LineProperties> _linePropertiesList

Line number N should have end point on point number N. The first line should be null if the multi line is open and from the last to the first if closed I could possibly also have the first LineProperties have an extra reference at the end

Constructor Detail

ChainCodeHandler

public ChainCodeHandler(AnnotatedShapeImplementation annotatedShape)

Method Detail

setup

public void setup()

Specified by:

setup in interface LazyCalc<MultiLine>

Specified by:

setup in interface AnnotatedShape

Overrides:

setup in class BaseAnnotatedShape

calc

public MultiLine calc()

Specified by:

calc in interface Calc<MultiLine>

getCalcValue

public MultiLine getCalcValue()

Description copied from interface: Calc

If dirty do calc() else return cached value. This should maybe be moved up in the hierarchy

Specified by:

getCalcValue in interface Calc<MultiLine>

findAccumulatedDirectionChange

public void findAccumulatedDirectionChange()

Find the accumulated direction change, the sum of all turns.

addChainCode

public void addChainCode(byte chainCode)

swapChainCodeInOppositeDirection

public void swapChainCodeInOppositeDirection()

Opposite Direction.

isDirty

public boolean isDirty()

Specified by:

isDirty in interface LazyCalc<MultiLine>

getDistLimit

protected double getDistLimit(int pixelCountInCurrentLineInterval)

DistLimit is half based on the diameter of the polygon half on the length of the line.

setFirstPoint

public void setFirstPoint(IPoint2D firstPoint)

getFirstPoint

public CPointInt getFirstPoint()

getChainCodeForMultiLine

public byte[] getChainCodeForMultiLine()

setMultiLine

public void setMultiLine(MultiLine line)

isClosed

public boolean isClosed()

Last point is a running point so this will not always work.

getLastChain

public int getLastChain()

getLastPoint

public CPointInt getLastPoint()