gov.nasa.worldwindx.examples.lineofsight
Class LineIntersector

java.lang.Object
  gov.nasa.worldwindx.examples.lineofsight.LineIntersector

All Implemented Interfaces:

Runnable

Direct Known Subclasses:

ShapeLineIntersector, TerrainLineIntersector

public abstract class LineIntersector
extends Object
implements Runnable

Base class for intersectors that compute intersections with a line. The line is specified by a single origin (see setReferencePosition(gov.nasa.worldwind.geom.Position)) and a list of end positions (see setPositions(Iterable)).

Nested Class Summary

protected class

LineIntersector.InternalIntersector

Field Summary

protected Map<Position,List<Intersection>>	allIntersections
protected long	endTime
protected int	numPositions
protected AtomicInteger	numProcessedPositions
protected int	numThreads
protected Iterable<Position>	positions
protected Vec4	referencePoint
protected Position	referencePosition
protected long	startTime
protected Terrain	terrain
protected ThreadPoolExecutor	threadPool

Constructor Summary

protected

LineIntersector(Terrain terrain, int numThreads)

Method Summary

protected abstract void	doPerformIntersection(Position position) Called to execute an intersection test for one position.
Map<Position,List<Intersection>>	getAllIntersections()
long	getEndTime()
List<Intersection>	getIntersections(Position position)
int	getNumProcessedPositions()
int	getNumThreads()
Iterable<Position>	getPositions()
Position	getReferencePosition()
long	getStartTime()
Terrain	getTerrain()
protected void	performIntersection(Position position)
void	run()
void	setPositions(Iterable<Position> positions) Specifies the end positions of all lines to intersect.
void	setReferencePosition(Position referencePosition) Sets the origin of the lines to intersect.

Methods inherited from class java.lang.Object

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

Field Detail

allIntersections

protected Map<Position,List<Intersection>> allIntersections

endTime

protected long endTime

numPositions

protected int numPositions

numProcessedPositions

protected AtomicInteger numProcessedPositions

numThreads

protected int numThreads

positions

protected Iterable<Position> positions

referencePoint

protected Vec4 referencePoint

referencePosition

protected Position referencePosition

startTime

protected long startTime

terrain

protected Terrain terrain

threadPool

protected ThreadPoolExecutor threadPool

Constructor Detail

LineIntersector

protected LineIntersector(Terrain terrain,
                          int numThreads)

Method Detail

doPerformIntersection

protected abstract void doPerformIntersection(Position position)
                                       throws InterruptedException

Called to execute an intersection test for one position.

Parameters:

position - the position to test.

Throws:

InterruptedException - if the operation is interrupted.s

getAllIntersections

public Map<Position,List<Intersection>> getAllIntersections()

getEndTime

public long getEndTime()

getIntersections

public List<Intersection> getIntersections(Position position)

getNumProcessedPositions

public int getNumProcessedPositions()

getNumThreads

public int getNumThreads()

getPositions

public Iterable<Position> getPositions()

getReferencePosition

public Position getReferencePosition()

getStartTime

public long getStartTime()

getTerrain

public Terrain getTerrain()

performIntersection

protected void performIntersection(Position position)
                            throws InterruptedException

Throws:

InterruptedException

run

public void run()

Specified by:

run in interface Runnable

setPositions

public void setPositions(Iterable<Position> positions)

Specifies the end positions of all lines to intersect. Intersection tests are performed for each position, using the position as the line's end and the current reference position as the line's origin.

Parameters:

positions - the positions.

setReferencePosition

public void setReferencePosition(Position referencePosition)

Sets the origin of the lines to intersect.

Parameters:

referencePosition - the origin to use for all lines.