public class

FlatteningPathIterator

extends Object
implements PathIterator
java.lang.Object
   ↳ java.awt.geom.FlatteningPathIterator

Class Overview

The FlatteningPathIterator class returns a flattened view of another PathIterator object. Other Shape classes can use this class to provide flattening behavior for their paths without having to perform the interpolation calculations themselves.

Summary

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Inherited Constants
From interface java.awt.geom.PathIterator
Public Constructors
FlatteningPathIterator(PathIterator src, double flatness)
Constructs a new FlatteningPathIterator object that flattens a path as it iterates over it.
FlatteningPathIterator(PathIterator src, double flatness, int limit)
Constructs a new FlatteningPathIterator object that flattens a path as it iterates over it.
Public Methods
int currentSegment(float[] coords)
Returns the coordinates and type of the current path segment in the iteration.
int currentSegment(double[] coords)
Returns the coordinates and type of the current path segment in the iteration.
double getFlatness()
Returns the flatness of this iterator.
int getRecursionLimit()
Returns the recursion limit of this iterator.
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.
[Expand]
Inherited Methods
From class java.lang.Object
From interface java.awt.geom.PathIterator

Public Constructors

public FlatteningPathIterator (PathIterator src, double flatness)

Constructs a new FlatteningPathIterator object that flattens a path as it iterates over it. The iterator does not subdivide any curve read from the source iterator to more than 10 levels of subdivision which yields a maximum of 1024 line segments per curve.

Parameters
src the original unflattened path being iterated over
flatness the maximum allowable distance between the control points and the flattened curve

public FlatteningPathIterator (PathIterator src, double flatness, int limit)

Constructs a new FlatteningPathIterator object that flattens a path as it iterates over it. The limit parameter allows you to control the maximum number of recursive subdivisions that the iterator can make before it assumes that the curve is flat enough without measuring against the flatness parameter. The flattened iteration therefore never generates more than a maximum of (2^limit) line segments per curve.

Parameters
src the original unflattened path being iterated over
flatness the maximum allowable distance between the control points and the flattened curve
limit the maximum number of recursive subdivisions allowed for any curved segment
Throws
if flatness or limit is less than zero

Public Methods

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, or SEG_CLOSE. A float 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 float x,y coordinates. SEG_MOVETO and SEG_LINETO types return one point, and SEG_CLOSE does not return any points.

Parameters
coords an array that holds the data returned from this method
Returns
  • the path segment type of the current path segment.
Throws
if there are no more elements in the flattening path to be returned.
See Also

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, 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 return one point, and SEG_CLOSE does not return any points.

Parameters
coords an array that holds the data returned from this method
Returns
  • the path segment type of the current path segment.
Throws
if there are no more elements in the flattening path to be returned.
See Also

public double getFlatness ()

Returns the flatness of this iterator.

Returns
  • the flatness of this FlatteningPathIterator.

public int getRecursionLimit ()

Returns the recursion limit of this iterator.

Returns
  • the recursion limit of this FlatteningPathIterator.

public int getWindingRule ()

Returns the winding rule for determining the interior of the path.

Returns
  • the winding rule of the original unflattened path being iterated over.
See Also

public boolean isDone ()

Tests if the iteration is complete.

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

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.