org.jaitools.imageutils.shape
Class PackedLineIterator

java.lang.Object
  extended by org.jaitools.imageutils.shape.AbstractLiteIterator
      extended by org.jaitools.imageutils.shape.PackedLineIterator
All Implemented Interfaces:
PathIterator

public final class PackedLineIterator
extends AbstractLiteIterator

A path iterator for the LiteShape class, specialized to iterate over LineString object. This class was ported back and simplified from GeoTools, with permission from the author(s)

Author:
Andrea Aime, simone giannecchini

Field Summary
 
Fields inherited from class org.jaitools.imageutils.shape.AbstractLiteIterator
dcoords
 
Fields inherited from interface java.awt.geom.PathIterator
SEG_CLOSE, SEG_CUBICTO, SEG_LINETO, SEG_MOVETO, SEG_QUADTO, WIND_EVEN_ODD, WIND_NON_ZERO
 
Constructor Summary
PackedLineIterator(com.vividsolutions.jts.geom.LineString ls, AffineTransform at)
          Creates a new instance of LineIterator
 
Method Summary
 int currentSegment(double[] coords)
           
 int currentSegment(float[] coords)
          Returns the coordinates and type of the current path segment in the iteration.
 int getWindingRule()
          Returns the winding rule for determining the interior of the path.
 boolean isDone()
          Tests if the iteration is complete.
 void next()
          Moves the iterator to the next segment of the path forwards along the primary direction of traversal as long as there are more points in that direction.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

PackedLineIterator

public PackedLineIterator(com.vividsolutions.jts.geom.LineString ls,
                          AffineTransform at)
Creates a new instance of LineIterator

Parameters:
ls - The line string the iterator will use
at - The affine transform applied to coordinates during iteration
Method Detail

currentSegment

public int currentSegment(float[] coords)
Returns the coordinates and type of the current path segment in the iteration. The return value is the path-segment type: SEG_MOVETO, SEG_LINETO, SEG_QUADTO, SEG_CUBICTO, or SEG_CLOSE. A double array of length 6 must be passed in and can be used to store the coordinates of the point(s). Each point is stored as a pair of double x,y coordinates. SEG_MOVETO and SEG_LINETO types returns one point, SEG_QUADTO returns two points, SEG_CUBICTO returns 3 points and SEG_CLOSE does not return any points.

Specified by:
currentSegment in interface PathIterator
Overrides:
currentSegment in class AbstractLiteIterator
Parameters:
coords - an array that holds the data returned from this method
Returns:
the path-segment type of the current path segment.
See Also:
PathIterator.SEG_MOVETO, PathIterator.SEG_LINETO, PathIterator.SEG_QUADTO, PathIterator.SEG_CUBICTO, PathIterator.SEG_CLOSE

getWindingRule

public int getWindingRule()
Returns the winding rule for determining the interior of the path.

Returns:
the winding rule.
See Also:
PathIterator.WIND_EVEN_ODD, PathIterator.WIND_NON_ZERO

isDone

public boolean isDone()
Tests if the iteration is complete.

Returns:
true if all the segments have been read; false otherwise.

next

public void next()
Moves the iterator to the next segment of the path forwards along the primary direction of traversal as long as there are more points in that direction.


currentSegment

public int currentSegment(double[] coords)
See Also:
PathIterator.currentSegment(double[])


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