Subtraction (Game Changers' Picasso API (including private classes))

java.lang.Object
- picasso.parser.language.ExpressionTreeNode
- - picasso.parser.language.expressions.BinaryOperator
  - - picasso.parser.language.expressions.Subtraction

All Implemented Interfaces:

EvaluatableExpression
```
public class Subtraction
extends BinaryOperator
```
Represents the subtraction function in the Picasso language.

Field Summary
- Fields inherited from class picasso.parser.language.ExpressionTreeNode
  gelementsToValue

Constructor Summary

Constructors
Constructor	Description
`Subtraction(ExpressionTreeNode param1, ExpressionTreeNode param2)`	Create an subtraction expression tree that takes as a parameter the given expression

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`RGBColor`	`evaluate(double x, double y)`	Evaluates this expression at the given x,y point by evaluating the subtraction of the function's parameters.

Methods inherited from class picasso.parser.language.expressions.BinaryOperator
equals, toString

Methods inherited from class java.lang.Object
clone, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - Subtraction
```
public Subtraction(ExpressionTreeNode param1,
                   ExpressionTreeNode param2)
```
    Create an subtraction expression tree that takes as a parameter the given expression
    
    Parameters:
    
    param - the expression to subtraction
- Method Detail
  - evaluate
```
public RGBColor evaluate(double x,
                         double y)
```
    Evaluates this expression at the given x,y point by evaluating the subtraction of the function's parameters.
    
    Specified by:
    
    evaluate in interface EvaluatableExpression
    
    Specified by:
    
    evaluate in class ExpressionTreeNode
    
    Parameters:
    
    x - the value of x
    
    y - the value of y
    
    Returns:
    
    the color from evaluating the subtraction of the expression's parameters