j2d.filters
Class Gradient

java.lang.Object
  j2d.filters.ArrayColormap
      j2d.filters.Gradient

All Implemented Interfaces:

Colormap, java.io.Serializable, java.lang.Cloneable

public class Gradient
extends ArrayColormap
implements java.lang.Cloneable, java.io.Serializable

A Colormap implemented using Catmull-Rom colour splines. The map has a variable number of knots with a minimum of four. The first and last knots give the tangent at the end of the spline, and colours are interpolated from the second to the second-last knots. Each knot can be given a type of interpolation. These are:

• LINEAR - linear interpolation to next knot
• SPLINE - spline interpolation to next knot
• CONSTANT - no interpolation - the colour is constant to the next knot
• HUE_CW - interpolation of hue clockwise to next knot
• HUE_CCW - interpolation of hue counter-clockwise to next knot

See Also:

Serialized Form

Field Summary

static int	CIRCLE_DOWN
static int	CIRCLE_UP
static int	CONSTANT
static int	HUE_CCW
static int	HUE_CW
byte[]	knotTypes
static int	LINEAR
int	numKnots
static int	RGB
static int	SPLINE
int[]	xKnots
int[]	yKnots

Constructor Summary

Gradient()

Gradient(int[] rgb)

Gradient(int[] x, int[] rgb)

Gradient(int[] x, int[] rgb, byte[] types)

Method Summary

void	addKnot(int x, int color, int type)
java.lang.Object	clone()
void	copyTo(Gradient g)
int	getKnot(int n)
byte	getKnotBlend(int n)
int	getKnotType(int n)
int	knotAt(int x)
void	mutate(float amount)
static Gradient	randomGradient()
void	randomize()
void	rebuild()
void	removeKnot(int n)
void	setColor(int n, int color)
void	setKnot(int n, int color)
void	setKnotBlend(int n, int type)
void	setKnotPosition(int n, int x)
void	setKnots(int[] x, int[] rgb, byte[] types)
void	setKnots(int[] x, int[] y, byte[] types, int offset, int count)
void	setKnotType(int n, int type)
void	splitSpan(int n)

Methods inherited from class j2d.filters.ArrayColormap

getColor, getMap, setColorInterpolated, setColorRange, setColorRange, setMap

Methods inherited from class java.lang.Object

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

Field Detail

RGB

public static final int RGB

See Also:

Constant Field Values

HUE_CW

public static final int HUE_CW

See Also:

Constant Field Values

HUE_CCW

public static final int HUE_CCW

See Also:

Constant Field Values

LINEAR

public static final int LINEAR

See Also:

Constant Field Values

SPLINE

public static final int SPLINE

See Also:

Constant Field Values

CIRCLE_UP

public static final int CIRCLE_UP

See Also:

Constant Field Values

CIRCLE_DOWN

public static final int CIRCLE_DOWN

See Also:

Constant Field Values

CONSTANT

public static final int CONSTANT

See Also:

Constant Field Values

numKnots

public int numKnots

xKnots

public int[] xKnots

yKnots

public int[] yKnots

knotTypes

public byte[] knotTypes

Constructor Detail

Gradient

public Gradient()

Gradient

public Gradient(int[] rgb)

Gradient

public Gradient(int[] x,
                int[] rgb)

Gradient

public Gradient(int[] x,
                int[] rgb,
                byte[] types)

Method Detail

clone

public java.lang.Object clone()

Overrides:

clone in class ArrayColormap

copyTo

public void copyTo(Gradient g)

setColor

public void setColor(int n,
                     int color)

Overrides:

setColor in class ArrayColormap

getKnot

public int getKnot(int n)

setKnot

public void setKnot(int n,
                    int color)

setKnotType

public void setKnotType(int n,
                        int type)

getKnotType

public int getKnotType(int n)

setKnotBlend

public void setKnotBlend(int n,
                         int type)

getKnotBlend

public byte getKnotBlend(int n)

addKnot

public void addKnot(int x,
                    int color,
                    int type)

removeKnot

public void removeKnot(int n)

setKnots

public void setKnots(int[] x,
                     int[] rgb,
                     byte[] types)

setKnots

public void setKnots(int[] x,
                     int[] y,
                     byte[] types,
                     int offset,
                     int count)

splitSpan

public void splitSpan(int n)

setKnotPosition

public void setKnotPosition(int n,
                            int x)

knotAt

public int knotAt(int x)

rebuild

public void rebuild()

randomize

public void randomize()

mutate

public void mutate(float amount)

randomGradient

public static Gradient randomGradient()