Package org.jfree.chart.util

Class GeomUtil

java.lang.Object

org.jfree.chart.util.GeomUtil

public final class GeomUtil
extends Object

Some utility methods for working with geometry in Java2D.

Method Summary

Modifier and Type	Method	Description
static Point2D	calculateIntersectionPoint(Line2D lineA, Line2D lineB)	Calculates the intersection point of lineA with lineB, possibly null if no intersection point exists (i.e.
static Point2D[]	calculateIntersectionPoints(Line2D lineA, Line2D... lines)	For each line in lines, calculates its intersection point with lineA, possibly no intersection point exists (i.e.
static Line2D[]	getLines(Shape shape, AffineTransform at)	Returns all line segments building up a shape.

Methods inherited from class java.lang.Object

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

Method Details

calculateIntersectionPoints

public static Point2D[] calculateIntersectionPoints(Line2D lineA,
 Line2D... lines)

For each line in lines, calculates its intersection point with lineA, possibly no intersection point exists (i.e. parallel lines).

Parameters:

lineA - line to calculate the intersection point for.

lines - lines to calculate the intersection points with.

Returns:

all intersections points between lineA and lines.

See Also:

• calculateIntersectionPoint(Line2D, Line2D)

calculateIntersectionPoint

public static Point2D calculateIntersectionPoint(Line2D lineA,
 Line2D lineB)

Calculates the intersection point of lineA with lineB, possibly null if no intersection point exists (i.e. parallel lines).

Parameters:

lineA - the first line for the calculation

lineB - the second line for the calculation

Returns:

the intersection point of lineA with lineB, possibly null if no intersection point exists

getLines

public static Line2D[] getLines(Shape shape,
 AffineTransform at)
                         throws IllegalArgumentException

Returns all line segments building up a shape.

Parameters:

shape - a shape that is built up of PathIterator.SEG_LINETO elements.

at - an optional AffineTransform to be applied to the coordinates as they are returned in the iteration, or null if untransformed coordinates are desired

Returns:

all line segments building up the shape

Throws:

IllegalArgumentException - if shape contains non-straight line segments (i.e. PathIterator.SEG_CUBICTO or PathIterator.SEG_QUADTO)