org.apache.batik.ext.awt.geom
Class PathLength

java.lang.Object
  |
  +--org.apache.batik.ext.awt.geom.PathLength

public class PathLength

extends java.lang.Object

PathLength is a utility class for calculating the length of a path, the location of a point at a particular length along the path, and the angle of the tangent to the path at a given length.

It uses a FlatteningPathIterator to create a flattened version of the Path. This means the values returned are not always exact (in fact, they rarely are), but in most cases they are reasonably accurate.

Inner Class Summary

protected class

PathLength.PathSegment

Constructor Summary

PathLength(java.awt.Shape path)
Construct a PathLength utility class to operate on the particular Shape.

Method Summary

float	angleAtLength(float length)
java.awt.Shape	getPath() Get the path to use in calculations.
protected void	initialise()
float	lengthOfPath() Returns the length of the path used by this PathLength object.
static void	main(java.lang.String[] args)
java.awt.geom.Point2D	pointAtLength(float length) Return the point that is at the given length along the path.
void	setPath(java.awt.Shape v) Set the path to use in calculations.

Methods inherited from class java.lang.Object

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

Constructor Detail

PathLength

public PathLength(java.awt.Shape path)

Construct a PathLength utility class to operate on the particular Shape.

Parameters:

path - The Path (or Shape) to use.

Method Detail

getPath

public java.awt.Shape getPath()

Get the path to use in calculations.

Returns:

Path used in calculations.

setPath

public void setPath(java.awt.Shape v)

Set the path to use in calculations.

Parameters:

v - Path to be used in calculations.

lengthOfPath

public float lengthOfPath()

Returns the length of the path used by this PathLength object.

Returns:

The length of the path.

initialise

protected void initialise()

pointAtLength

public java.awt.geom.Point2D pointAtLength(float length)

Return the point that is at the given length along the path.

Parameters:

length - The length along the path

Returns:

The point at the given length

angleAtLength

public float angleAtLength(float length)

main

public static void main(java.lang.String[] args)