ch.randelshofer.geom3d
Class Point3D

java.lang.Object
  ch.randelshofer.geom3d.Point3D

All Implemented Interfaces:

java.lang.Cloneable

public class Point3D
extends java.lang.Object
implements java.lang.Cloneable

A point representing a location in (x, y, z) coordinate space.

Version:

1.0 2009-01-04 Added method planeEquation. 0.2 1999-1-1 Package renamed.
0.1 1998-12-15 Released.
0.0 1998-02-15 Created.

Author:

Werner Randelshofer, Hausmatt 10 ,6405 Immensee

Field Summary

double	x The x coordinate of the point.
double	y The y coordinate of the point.
double	z The z coordinate of the point.

Constructor Summary

Point3D()
Constructs and initializes a Point with 0, 0, 0.

Point3D(double x, double y, double z)
Constructs and initializes a Point with the specified coordinates.

Method Summary

Point3D	clone()
static double	dotProduct(Point3D a, Point3D b) dotProduct product of 2 vectors.
double	getX() Returns the X coordinate of the point in double precision.
double	getY() Returns the Y coordinate of the point in double precision.
double	getZ() Returns the Z coordinate of the point in double precision.
double	length() Length of this vector.
Point3D	normalize() Normalizes the vector.
static double[]	planeEquation(Point3D v1, Point3D v2, Point3D v3) Computes the plane equation a*x + b*y + c*z + d = 0 from three given points in space.
static Point3D	sub(Point3D a, Point3D b) subtracts 2 vectors.
java.lang.String	toString() Returns a String that represents the value of this Object.
static Point3D	vectorProduct(Point3D a, Point3D b) returns a x b.

Methods inherited from class java.lang.Object

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

Field Detail

x

public double x

The x coordinate of the point.

y

public double y

The y coordinate of the point.

z

public double z

The z coordinate of the point.

Constructor Detail

Point3D

public Point3D()

Constructs and initializes a Point with 0, 0, 0.

Point3D

public Point3D(double x,
               double y,
               double z)

Constructs and initializes a Point with the specified coordinates.

Method Detail

toString

public java.lang.String toString()

Returns a String that represents the value of this Object.

Overrides:

toString in class java.lang.Object

getX

public double getX()

Returns the X coordinate of the point in double precision.

getY

public double getY()

Returns the Y coordinate of the point in double precision.

getZ

public double getZ()

Returns the Z coordinate of the point in double precision.

planeEquation

public static double[] planeEquation(Point3D v1,
                                     Point3D v2,
                                     Point3D v3)

Computes the plane equation a*x + b*y + c*z + d = 0 from three given points in space.

Parameters:

v1 -

v2 -

v3 -

vectorProduct

public static Point3D vectorProduct(Point3D a,
                                    Point3D b)

returns a x b.

dotProduct

public static double dotProduct(Point3D a,
                                Point3D b)

dotProduct product of 2 vectors.

sub

public static Point3D sub(Point3D a,
                          Point3D b)

subtracts 2 vectors.

normalize

public Point3D normalize()

Normalizes the vector.

length

public double length()

Length of this vector.

clone

public Point3D clone()

Overrides:

clone in class java.lang.Object