Package net.paulhertz.pixelaudio

Class HilbertGen

java.lang.Object

net.paulhertz.pixelaudio.PixelMapGen

net.paulhertz.pixelaudio.HilbertGen

public class HilbertGen
extends PixelMapGen

Generates coordinates and LUTs for a Hilbert curve over a square bitmap starting at (0,0) and ending at (width-1, 0). Width and height must be equal powers of 2. You can also call HilbertGen(int depth) and width and height will equal Math.pow(2, depth). See abstract class PixelMapGen for instance variables shared by all child classes.

Field Summary

Fields

Modifier and Type	Field	Description
int	depth	recursion depth
static final String	description

Fields inherited from class net.paulhertz.pixelaudio.PixelMapGen

coords, h, pixelMap, sampleMap, size, transformType, w

Constructor Summary

Constructors

Constructor	Description
HilbertGen(int depth)
HilbertGen(int width, int height)
HilbertGen(int width, int height, AffineTransformType type)
HilbertGen(int depth, AffineTransformType type)

Method Summary

Modifier and Type	Method	Description
String	describe()
int[]	generate()	Initialization method that sets this.coords, and then this.pixelMap and this.sampleMap: this.coords is a list of coordinate pairs representing the signal path, the (x,y) pixel locations along a path that visits every pixel in a bitmap exactly once.
boolean	validate(int width, int height)

Methods inherited from class net.paulhertz.pixelaudio.PixelMapGen

findNearestPowerOfTwoLessThan, findPowerOfTwo, getCoordinates, getCoordinatesCopy, getHeight, getInversMapFromPixelArray, getPixelMap, getPixelMapCopy, getPixelMapFromCoordinatess, getSampleMap, getSampleMapCopy, getSize, getTransformType, getWidth, isPowerOfTwo, loadIndexMaps, setMapsFromCoords, setTransformType, transformCoords

Methods inherited from class java.lang.Object

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

Field Details

depth

public int depth

recursion depth

description

public static final String description

See Also:

• Constant Field Values

Constructor Details

HilbertGen

public HilbertGen(int width,
 int height,
 AffineTransformType type)

HilbertGen

public HilbertGen(int width,
 int height)

HilbertGen

public HilbertGen(int depth)

HilbertGen

public HilbertGen(int depth,
 AffineTransformType type)

Method Details

describe

public String describe()

Specified by:

describe in class PixelMapGen

Returns:

A String describing the mapping generated by your class and any initialization requirements.

validate

public boolean validate(int width,
 int height)

Specified by:

validate in class PixelMapGen

Returns:

true if the width and height parameters are valid for creating a mapping with this generator, otherwise, false.

generate

public int[] generate()

Description copied from class: PixelMapGen

Initialization method that sets this.coords, and then this.pixelMap and this.sampleMap: this.coords is a list of coordinate pairs representing the signal path, the (x,y) pixel locations along a path that visits every pixel in a bitmap exactly once. Once you have created it, you can call setMapsFromCoords() to set this.pixelMap and this.sampleMap automatically.

generate() must be called from your class, so that you can initialize any local variables before generating coordinates and LUTs. The best place to call it is typically on the last line of the constructor for your class, after calling super() on the first line and after initializing any local variables needed to generate your coordinates and LUTs. You must initialize this.coords, this.pixelMap, and this.sampleMap within generate(). See DiagonalZigzagGen or HilbertGen for sample code.

Specified by:

generate in class PixelMapGen

Returns:

this.pixelMap, the value for PixelAudioMapper.signalToImageLUT.