edu.unh.sdb.datasource

Class RayIterator

java.lang.Object

edu.unh.sdb.datasource.RayIterator

All Implemented Interfaces:

SDBIterator

public class RayIterator
extends java.lang.Object
implements SDBIterator

Reads data from a DataSource along a line segment.

Constructor Summary

Constructors

Constructor and Description
RayIterator(DataSource dataSource, javax.vecmath.Point3d begin, javax.vecmath.Point3d end, IndexSpaceID blockSize, double step) Reads data from dataSource along the line seqment between p1 and p2.

Method Summary

Methods

Modifier and Type	Method and Description
void	end() Advance the iterator to the last valid value in the iteration.
javax.vecmath.Point3d	getBeginPoint() Returns the begin, current and end point or block coordinates.
java.lang.Object	getCurrentElement()
int	getCurrentElementIndex()
javax.vecmath.Point3d	getCurrentPoint()
javax.vecmath.Point3d	getEndPoint()
javax.vecmath.Vector3d	getLineNormal()
int	getNumberOfElements()
javax.vecmath.Point3d	getOriginalBeginPoint()
javax.vecmath.Point3d	getOriginalEndPoint()
double	getStep()
TransferFunction	getTransferFunction()
void	init() Perform any necessary initialization, and set the iterator value to the first value in the iteration.
boolean	next() Advance the iterator by one step.
boolean	valid() Return true if the iterator currently has a valid value, false otherwise.

Methods inherited from class java.lang.Object

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

Constructor Detail

RayIterator

public RayIterator(DataSource dataSource,
           javax.vecmath.Point3d begin,
           javax.vecmath.Point3d end,
           IndexSpaceID blockSize,
           double step)

Reads data from dataSource along the line seqment between p1 and p2.

Method Detail

init

public void init()

Description copied from interface: SDBIterator

Perform any necessary initialization, and set the iterator value to the first value in the iteration.

Specified by:

init in interface SDBIterator

next

public boolean next()

Description copied from interface: SDBIterator

Advance the iterator by one step. If the iterator cannot be advanced to produce a valid value, the value of the iterator is undefined, but the next() method will return false, as will a subsequent call to valid().

Specified by:

next in interface SDBIterator

valid

public boolean valid()

Description copied from interface: SDBIterator

Return true if the iterator currently has a valid value, false otherwise.

Specified by:

valid in interface SDBIterator

end

public void end()

Description copied from interface: SDBIterator

Advance the iterator to the last valid value in the iteration. (optional operation)

Specified by:

end in interface SDBIterator

getTransferFunction

public final TransferFunction getTransferFunction()

getBeginPoint

public javax.vecmath.Point3d getBeginPoint()

Returns the begin, current and end point or block coordinates. The 'original' versions for the begin and end coordinates are necessar because the sometimes the algorithm switches the original begin and end points.

getOriginalBeginPoint

public javax.vecmath.Point3d getOriginalBeginPoint()

getCurrentPoint

public javax.vecmath.Point3d getCurrentPoint()

getEndPoint

public javax.vecmath.Point3d getEndPoint()

getOriginalEndPoint

public javax.vecmath.Point3d getOriginalEndPoint()

getLineNormal

public javax.vecmath.Vector3d getLineNormal()

getCurrentElementIndex

public int getCurrentElementIndex()

getCurrentElement

public java.lang.Object getCurrentElement()

getNumberOfElements

public int getNumberOfElements()

getStep

public double getStep()