Package net.paulhertz.pixelaudio

Class Lindenmayer

java.lang.Object

net.paulhertz.pixelaudio.Lindenmayer

public class Lindenmayer
extends Object

Implements a simple Lindenmeyer system (L-system), a so-called DOL-system: deterministic and context-free. Load production strings into transTable with put(), retrieve them with get(). I used this class for Hilbert curve generation until I found analytical methods in Wikipedia to speed up curve generation. There will be demos, but probably not for the early beta release.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
class	Lindenmayer.AnimStepper	Animation frame-counting tool
class	Lindenmayer.AnimUnit	Data storage for number of steps n each of duration d, with additional scaling factor s.

Field Summary

Fields

Modifier and Type	Field	Description
private HashMap<String,String>	transTable	transition table for string production
boolean	verbose

Constructor Summary

Constructors

Constructor	Description
Lindenmayer()	Creates a new Lindenmeyer instance;

Method Summary

Modifier and Type	Method	Description
void	expandString(ArrayList<String> tokens, int levels, ArrayList<String> sb)
String	get(String clef)	Gets a value from the transition table corresponding to the supplied key.
ArrayList<String>	hilbert(int depth)	Encode strings representing a Hilbert curve to supplied depth.
int[]	loadAnimSteps(Lindenmayer.AnimStepper stepper)
void	put(String clef, String value)	Loads a key and its corresponding value into the transition table.

Methods inherited from class java.lang.Object

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

Field Details

transTable

private HashMap<String,String> transTable

transition table for string production

verbose

public boolean verbose

Constructor Details

Lindenmayer

public Lindenmayer()

Creates a new Lindenmeyer instance;

Method Details

get

public String get(String clef)

Gets a value from the transition table corresponding to the supplied key.

Parameters:

clef - a single-character String

Returns:

value corresponding to the key

put

public void put(String clef,
 String value)

Loads a key and its corresponding value into the transition table.

Parameters:

clef - a single-character String

value - the String value associated with the key

expandString

public void expandString(ArrayList<String> tokens,
 int levels,
 ArrayList<String> sb)

hilbert

public ArrayList<String> hilbert(int depth)

Encode strings representing a Hilbert curve to supplied depth. To draw the actual curve, ignore the R and L symbols + : 90 degrees CW - : 90 degrees CCW F : forward (n) units

Parameters:

depth - number of recursive iterations of the L-system

loadAnimSteps

public int[] loadAnimSteps(Lindenmayer.AnimStepper stepper)