jdsl.geomobj.ref
Class RealDirection2D

java.lang.Object
  |
  +--jdsl.geomobj.ref.AbstractGeomObject2D
        |
        +--jdsl.geomobj.ref.RealDirection2D

All Implemented Interfaces:

Direction2D, GeomObject, GeomObject2D

public class RealDirection2D

extends AbstractGeomObject2D

implements Direction2D

This is the class for a two-dimensional real direction.

Version:

$Id: RealDirection2D.java,v 1.1 2000/06/05 21:44:32 lv Exp $

Author:

Luca Vismara (lv)

Inner classes inherited from class jdsl.geomobj.api.GeomObject2D

GeomObject2D.NoneGeomObject2D

Field Summary

protected RealPoint2D

p_

Fields inherited from class jdsl.geomobj.ref.AbstractGeomObject2D

gt, jn

Fields inherited from interface jdsl.geomobj.api.GeomObject2D

NONE

Constructor Summary

RealDirection2D(double x, double y)

RealDirection2D(float x, float y)

Method Summary

int	arithmeticType() The arithmetic type of a geometric object is encoded as an integer number.
boolean	equals(java.lang.Object obj)
Direction2D	opposite()
Direction2D	perpendicular()
java.lang.String	toString()
double	x() This approximate method is provided for visualization purposes only; computations should be performed through methods of GeomTester2D.
double	y() This approximate method is provided for visualization purposes only; computations should be performed through methods of GeomTester2D.

Methods inherited from class jdsl.geomobj.ref.AbstractGeomObject2D

dim

Methods inherited from class java.lang.Object

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

Methods inherited from interface jdsl.geomobj.api.GeomObject

dim

Field Detail

p_

protected RealPoint2D p_

Constructor Detail

RealDirection2D

public RealDirection2D(float x,
                       float y)
                throws InvalidCoordinateException

Parameters:

x - x-coordinate of the point defining the direction

y - y-coordinate of the point defining the direction

Throws:

InvalidCoordinateException - if the point defining the direction is coincident with the origin of the plane

RealDirection2D

public RealDirection2D(double x,
                       double y)
                throws InvalidCoordinateException

Parameters:

x - x-coordinate of the point defining the direction

y - y-coordinate of the point defining the direction

Throws:

InvalidCoordinateException - if the point defining the direction is coincident with the origin of the plane

Method Detail

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

arithmeticType

public int arithmeticType()

Description copied from interface: GeomObject

The arithmetic type of a geometric object is encoded as an integer number. Current legal values are: 0 = an integer geometric object 1 = a rational geometric object

Specified by:

arithmeticType in interface GeomObject

Following copied from interface: jdsl.geomobj.api.GeomObject

Returns:

the arithmetic type of this

x

public double x()

Description copied from interface: Direction2D

This approximate method is provided for visualization purposes only; computations should be performed through methods of GeomTester2D.

Specified by:

x in interface Direction2D

Following copied from interface: jdsl.geomobj.api.Direction2D

Returns:

a double approximation of the x coordinate of the point defining the direction

y

public double y()

Description copied from interface: Direction2D

This approximate method is provided for visualization purposes only; computations should be performed through methods of GeomTester2D.

Specified by:

y in interface Direction2D

Following copied from interface: jdsl.geomobj.api.Direction2D

Returns:

a double approximation of the y coordinate of the point defining the direction

perpendicular

public Direction2D perpendicular()

Specified by:

perpendicular in interface Direction2D

Following copied from interface: jdsl.geomobj.api.Direction2D

Returns:

this direction rotated counterclockwise by 90 degrees

opposite

public Direction2D opposite()

Specified by:

opposite in interface Direction2D

Following copied from interface: jdsl.geomobj.api.Direction2D

Returns:

this direction rotated by 180 degrees