sjm.examples.sling
Class Arithmetic

java.lang.Object
  |
  +--sjm.examples.sling.SlingFunction
        |
        +--sjm.examples.sling.Arithmetic

public class Arithmetic

extends SlingFunction

This class wraps an arithmetic function around two source functions.

An Arithmetic object has an operator and two sources. The operator must be '+', '-', '/', '*' or '%' (or else f(t) of this object will always be (0, 0)).

The value of this function at time t is the value of the operator applied to the source functions at time t. For example, evaluating the arithmetic sum f1 + f2 at time t creates the point (f1(t).x + f2(t).x, f1(t).y + f2(t).y).

Field Summary

protected char

operator

Fields inherited from class sjm.examples.sling.SlingFunction

source

Constructor Summary

Arithmetic(char operator)
Constructs operator(t, t), where operator is one of the symbols +, -, /, *, %.

Arithmetic(char operator, SlingFunction a, SlingFunction b)
Constructs a function object that is the sum, difference, quotient, product or remainder (depending on the operator) of the supplied functions.

Method Summary

protected double	arithmetic(double a, double b)
Point	f(double t) Returns the sum, difference, quotient, product or remainder (depending on the operator) of this object's source functions.
java.lang.String	toString() Returns a string representation of this function.

Methods inherited from class sjm.examples.sling.SlingFunction

eval, extrema, fresh

Methods inherited from class java.lang.Object

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

Field Detail

operator

protected char operator

Constructor Detail

Arithmetic

public Arithmetic(char operator)

Constructs operator(t, t), where operator is one of the symbols +, -, /, *, %.

Arithmetic

public Arithmetic(char operator,
                  SlingFunction a,
                  SlingFunction b)

Constructs a function object that is the sum, difference, quotient, product or remainder (depending on the operator) of the supplied functions.

Parameters:

operator - the operator to apply, one of the characters in +-/*%

SlingFunction - an operand

SlingFunction - another operand

Method Detail

arithmetic

protected double arithmetic(double a,
                            double b)

f

public Point f(double t)

Returns the sum, difference, quotient, product or remainder (depending on the operator) of this object's source functions.

Overrides:

f in class SlingFunction

Parameters:

t - a number that represents how far along a plot is

Returns:

a new point that applies this object's operator to the values of the source functions at time t

toString

public java.lang.String toString()

Returns a string representation of this function.

Overrides:

toString in class java.lang.Object