java.awt.geom
Class ArcIterator

java.lang.Object
  extended byjava.awt.geom.ArcIterator
All Implemented Interfaces:
PathIterator

class ArcIterator
extends Object
implements PathIterator

A utility class to iterate over the path segments of an arc through the PathIterator interface.

Author:
Jim Graham

Field Summary
(package private)  AffineTransform affine
           
(package private)  double angExtDeg
           
(package private)  double angStRad
           
(package private)  int arcSegs
           
(package private)  double h
           
(package private)  int index
           
(package private)  int lineSegs
           
(package private)  double w
           
(package private)  double x
           
(package private)  double y
           
 
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
(package private) ArcIterator(Arc2D a, AffineTransform at)
           
 
Method Summary
private static double btan(double increment)
           
 int currentSegment(double[] coords)
          Returns the coordinates and type of the current path segment in the iteration.
 int currentSegment(float[] coords)
          Returns the coordinates and type of the current path segment in the iteration.
 int getWindingRule()
          Return the winding rule for determining the insideness of the path.
 boolean isDone()
          Tests if there are more points to read.
 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
 

Field Detail

x

double x

y

double y

w

double w

h

double h

angStRad

double angStRad

angExtDeg

double angExtDeg

affine

AffineTransform affine

index

int index

arcSegs

int arcSegs

lineSegs

int lineSegs
Constructor Detail

ArcIterator

ArcIterator(Arc2D a,
            AffineTransform at)
Method Detail

getWindingRule

public int getWindingRule()
Return the winding rule for determining the insideness of the path.

Specified by:
getWindingRule in interface PathIterator
Returns:
the winding rule.
See Also:
PathIterator.WIND_EVEN_ODD, PathIterator.WIND_NON_ZERO

isDone

public boolean isDone()
Tests if there are more points to read.

Specified by:
isDone in interface PathIterator
Returns:
true if there are more points to read

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.

Specified by:
next in interface PathIterator

btan

private static double btan(double increment)

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 float array of length 6 must be passed in and may be used to store the coordinates of the point(s). Each point is stored as a pair of float x,y coordinates. SEG_MOVETO and SEG_LINETO types will return one point, SEG_QUADTO will return two points, SEG_CUBICTO will return 3 points and SEG_CLOSE will not return any points.

Specified by:
currentSegment in interface PathIterator
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

currentSegment

public int currentSegment(double[] 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 may 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 will return one point, SEG_QUADTO will return two points, SEG_CUBICTO will return 3 points and SEG_CLOSE will not return any points.

Specified by:
currentSegment in interface PathIterator
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