SciLib.Math
Class rPoint

java.lang.Object
  SciLib.Math.rPoint

public class rPoint
extends java.lang.Object

This class describes a 3D point (x, y, z). A rPoint in 3D can be understood as a 3D vector

Field Summary

double	x public members
double	y public members
double	z public members

Constructor Summary

rPoint()
make a rPoint object at origin

rPoint(double x, double y, double z)
make a rPoint (x, y, z) object

rPoint(rPoint p)
make a rPoint from another rPoint

Method Summary

static rPoint	crossProduct(rPoint a, rPoint b) Compute the cross product of the two vector in 3D space
double	distance(rPoint p) compute the distance from this point to a point a
static double	dotProduct(rPoint a, rPoint b) Compute the dot product of the two vector in 3D space
static rPoint	minus(rPoint a, rPoint b) minus 2 3D vectors
double	norm() compute the norm of a 3D vector
static rPoint	plus(rPoint a, rPoint b) add 2 3D vectors
void	print() print this rPoint on the screen
void	scale(double s) multiplication of a 3D vector with a scalar
void	setPoint(double x, double y, double z) set rPoint
double	squareDistance(rPoint p) compute the square distance from this point to a point a
java.lang.String	toString() make a String from this rPoint

Methods inherited from class java.lang.Object

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

Field Detail

x

public double x

public members

y

public double y

public members

z

public double z

public members

Constructor Detail

rPoint

public rPoint()

make a rPoint object at origin

rPoint

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

make a rPoint (x, y, z) object

Parameters:

x - the first coordinate

y - the second coordinate

z - the third coordinate

rPoint

public rPoint(rPoint p)

make a rPoint from another rPoint

Parameters:

p - A rPoint

Method Detail

setPoint

public void setPoint(double x,
                     double y,
                     double z)

set rPoint

Parameters:

x - the first coordinate

y - the second coordinate

z - the third coordinate

squareDistance

public double squareDistance(rPoint p)

compute the square distance from this point to a point a

Parameters:

p - a rPoint

Returns:

A double value

distance

public double distance(rPoint p)

compute the distance from this point to a point a

Parameters:

p - a rPoint

Returns:

A double value

crossProduct

public static rPoint crossProduct(rPoint a,
                                  rPoint b)

Compute the cross product of the two vector in 3D space

Parameters:

a - a rPoint

b - a rPoint

Returns:

a rPoint

dotProduct

public static double dotProduct(rPoint a,
                                rPoint b)

Compute the dot product of the two vector in 3D space

Parameters:

a - a rPoint

b - a rPoint

Returns:

a double value

norm

public double norm()

compute the norm of a 3D vector

plus

public static rPoint plus(rPoint a,
                          rPoint b)

add 2 3D vectors

Parameters:

a - a rPoint

b - a rPoint

Returns:

a rPoint

minus

public static rPoint minus(rPoint a,
                           rPoint b)

minus 2 3D vectors

Parameters:

a - a rPoint

b - a rPoint

Returns:

a rPoint

scale

public void scale(double s)

multiplication of a 3D vector with a scalar

Parameters:

s - A double value

toString

public java.lang.String toString()

make a String from this rPoint

Overrides:

toString in class java.lang.Object

Returns:

a String

print

public void print()

print this rPoint on the screen