Package picasso.parser

Class PerlinFunctionAnalyzer

java.lang.Object

picasso.parser.PerlinFunctionAnalyzer

All Implemented Interfaces:

SemanticAnalyzerInterface

Direct Known Subclasses:

PerlinBWAnalyzer, PerlinColorAnalyzer

public abstract class PerlinFunctionAnalyzer
extends Object
implements SemanticAnalyzerInterface

Abstract base class for parsing Perlin noise functions

Constructor Summary

Constructors

Constructor	Description
PerlinFunctionAnalyzer()

Method Summary

Modifier and Type	Method	Description
protected abstract ExpressionTreeNode	createPerlinFunction(ExpressionTreeNode firstExpression, ExpressionTreeNode secondExpression)	Creates the specific Perlin function expression node
ExpressionTreeNode	generateExpressionTree(Stack<Token> tokens)	Parses tokens into a Perlin function expression

Methods inherited from class java.lang.Object

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

Constructor Detail

PerlinFunctionAnalyzer

public PerlinFunctionAnalyzer()

Method Detail

generateExpressionTree

public ExpressionTreeNode generateExpressionTree(Stack<Token> tokens)

Parses tokens into a Perlin function expression

Specified by:

generateExpressionTree in interface SemanticAnalyzerInterface

Parameters:

tokens - A stack of tokens in postfix order

Returns:

An ExpressionTreeNode representing the parsed Perlin function

createPerlinFunction

protected abstract ExpressionTreeNode createPerlinFunction(ExpressionTreeNode firstExpression,
                                                           ExpressionTreeNode secondExpression)

Creates the specific Perlin function expression node

Parameters:

firstExpression - the first expression parameter

secondExpression - the second expression parameter

Returns:

The ExpressionTreeNode for this Perlin function