Gradient (MeteoInfoLib 1.8 API)

java.lang.Object
- org.meteoinfo.image.filter.ArrayColormap
- - org.meteoinfo.image.filter.Gradient

所有已实现的接口:

Cloneable, Colormap
```
public class Gradient
extends ArrayColormap
implements Cloneable
```
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

字段概要

字段
限定符和类型	字段	说明
`static int`	`CIRCLE_DOWN`	Interpolate with a falling circle shape curve.
`static int`	`CIRCLE_UP`	Interpolate with a rising circle shape curve.
`static int`	`CONSTANT`	Don't tnterpolate - just use the starting value.
`static int`	`HUE_CCW`	Interpolate hue counter clockwise.
`static int`	`HUE_CW`	Interpolate hue clockwise.
`static int`	`LINEAR`	Interpolate linearly.
`static int`	`RGB`	Interpolate in RGB space.
`static int`	`SPLINE`	Interpolate using a spline.

从类继承的字段 org.meteoinfo.image.filter.ArrayColormap
map

构造器概要

构造器
构造器	说明
`Gradient()`	Construct a Gradient.
`Gradient(int[] rgb)`	Construct a Gradient with the given colors.
`Gradient(int[] x, int[] rgb)`	Construct a Gradient with the given colors and knot positions.
`Gradient(int[] x, int[] rgb, byte[] types)`	Construct a Gradient with the given colors, knot positions and interpolation types.

方法概要

所有方法静态方法实例方法具体方法
限定符和类型	方法	说明
`void`	`addKnot(int x, int color, int type)`	Add a new knot.
`Object`	`clone()`
`void`	`copyTo(Gradient g)`	Copy one Gradient into another.
`int`	`getKnot(int n)`	Get a knot color.
`byte`	`getKnotBlend(int n)`	Get a knot blend type.
`int`	`getKnotPosition(int n)`	Get a knot position.
`int`	`getKnotType(int n)`	Get a knot type.
`int`	`getNumKnots()`	Get the number of knots in the gradient.
`int`	`knotAt(int x)`	Return the knot at a given position.
`void`	`mutate(float amount)`	Mutate the gradient.
`static Gradient`	`randomGradient()`	Build a random gradient.
`void`	`randomize()`	Randomize the gradient.
`void`	`removeKnot(int n)`	Remove a knot.
`void`	`setColor(int n, int color)`	Set a knot color.
`void`	`setKnot(int n, int color)`	Set a knot color.
`void`	`setKnotBlend(int n, int type)`	Set a knot blend type.
`void`	`setKnotPosition(int n, int x)`	Set a knot position.
`void`	`setKnots(int[] x, int[] rgb, byte[] types)`	Set the values of all the knots.
`void`	`setKnots(int[] x, int[] y, byte[] types, int offset, int count)`	Set the values of a set of knots.
`void`	`setKnotType(int n, int type)`	Set a knot type.
`void`	`splitSpan(int n)`	Split a span into two by adding a knot in the middle.

从类继承的方法 org.meteoinfo.image.filter.ArrayColormap
getColor, getMap, setColorInterpolated, setColorRange, setColorRange, setMap

从类继承的方法 java.lang.Object
equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- 字段详细资料
  - RGB
```
public static final int RGB
```
    Interpolate in RGB space.
    
    另请参阅:
    
    常量字段值
  - HUE_CW
```
public static final int HUE_CW
```
    Interpolate hue clockwise.
    
    另请参阅:
    
    常量字段值
  - HUE_CCW
```
public static final int HUE_CCW
```
    Interpolate hue counter clockwise.
    
    另请参阅:
    
    常量字段值
  - LINEAR
```
public static final int LINEAR
```
    Interpolate linearly.
    
    另请参阅:
    
    常量字段值
  - SPLINE
```
public static final int SPLINE
```
    Interpolate using a spline.
    
    另请参阅:
    
    常量字段值
  - CIRCLE_UP
```
public static final int CIRCLE_UP
```
    Interpolate with a rising circle shape curve.
    
    另请参阅:
    
    常量字段值
  - CIRCLE_DOWN
```
public static final int CIRCLE_DOWN
```
    Interpolate with a falling circle shape curve.
    
    另请参阅:
    
    常量字段值
  - CONSTANT
```
public static final int CONSTANT
```
    Don't tnterpolate - just use the starting value.
    
    另请参阅:
    
    常量字段值
- 构造器详细资料
  - Gradient
```
public Gradient()
```
    Construct a Gradient.
  - Gradient
```
public Gradient(int[] rgb)
```
    Construct a Gradient with the given colors.
    
    参数:
    
    rgb - the colors
  - Gradient
```
public Gradient(int[] x,
                int[] rgb)
```
    Construct a Gradient with the given colors and knot positions.
    
    参数:
    
    x - the knot positions
    
    rgb - the colors
  - Gradient
```
public Gradient(int[] x,
                int[] rgb,
                byte[] types)
```
    Construct a Gradient with the given colors, knot positions and interpolation types.
    
    参数:
    
    x - the knot positions
    
    rgb - the colors
    
    types - interpolation types
- 方法详细资料
  - clone
```
public Object clone()
```
    覆盖:
    
    clone 在类中 ArrayColormap
  - copyTo
```
public void copyTo(Gradient g)
```
    Copy one Gradient into another.
    
    参数:
    
    g - the Gradient to copy into
  - setColor
```
public void setColor(int n,
                     int color)
```
    Set a knot color.
    
    覆盖:
    
    setColor 在类中 ArrayColormap
    
    参数:
    
    n - the knot index
    
    color - the color
    
    另请参阅:
    
    ArrayColormap.getColor(float)
  - getNumKnots
```
public int getNumKnots()
```
    Get the number of knots in the gradient.
    
    返回:
    
    the number of knots.
  - setKnot
```
public void setKnot(int n,
                    int color)
```
    Set a knot color.
    
    参数:
    
    n - the knot index
    
    color - the color
    
    另请参阅:
    
    getKnot(int)
  - getKnot
```
public int getKnot(int n)
```
    Get a knot color.
    
    参数:
    
    n - the knot index
    
    返回:
    
    the knot color
    
    另请参阅:
    
    setKnot(int, int)
  - setKnotType
```
public void setKnotType(int n,
                        int type)
```
    Set a knot type.
    
    参数:
    
    n - the knot index
    
    type - the type
    
    另请参阅:
    
    getKnotType(int)
  - getKnotType
```
public int getKnotType(int n)
```
    Get a knot type.
    
    参数:
    
    n - the knot index
    
    返回:
    
    the knot type
    
    另请参阅:
    
    setKnotType(int, int)
  - setKnotBlend
```
public void setKnotBlend(int n,
                         int type)
```
    Set a knot blend type.
    
    参数:
    
    n - the knot index
    
    type - the knot blend type
    
    另请参阅:
    
    getKnotBlend(int)
  - getKnotBlend
```
public byte getKnotBlend(int n)
```
    Get a knot blend type.
    
    参数:
    
    n - the knot index
    
    返回:
    
    the knot blend type
    
    另请参阅:
    
    setKnotBlend(int, int)
  - addKnot
```
public void addKnot(int x,
                    int color,
                    int type)
```
    Add a new knot.
    
    参数:
    
    x - the knot position
    
    color - the color
    
    type - the knot type
    
    另请参阅:
    
    removeKnot(int)
  - removeKnot
```
public void removeKnot(int n)
```
    Remove a knot.
    
    参数:
    
    n - the knot index
    
    另请参阅:
    
    addKnot(int, int, int)
  - setKnots
```
public void setKnots(int[] x,
                     int[] rgb,
                     byte[] types)
```
    Set the values of all the knots. This version does not require the "extra" knots at -1 and 256
    
    参数:
    
    x - the knot positions
    
    rgb - the knot colors
    
    types - the knot types
  - setKnots
```
public void setKnots(int[] x,
                     int[] y,
                     byte[] types,
                     int offset,
                     int count)
```
    Set the values of a set of knots.
    
    参数:
    
    x - the knot positions
    
    y - the knot colors
    
    types - the knot types
    
    offset - the first knot to set
    
    count - the number of knots
  - splitSpan
```
public void splitSpan(int n)
```
    Split a span into two by adding a knot in the middle.
    
    参数:
    
    n - the span index
  - setKnotPosition
```
public void setKnotPosition(int n,
                            int x)
```
    Set a knot position.
    
    参数:
    
    n - the knot index
    
    x - the knot position
    
    另请参阅:
    
    setKnotPosition(int, int)
  - getKnotPosition
```
public int getKnotPosition(int n)
```
    Get a knot position.
    
    参数:
    
    n - the knot index
    
    返回:
    
    the knot position
    
    另请参阅:
    
    setKnotPosition(int, int)
  - knotAt
```
public int knotAt(int x)
```
    Return the knot at a given position.
    
    参数:
    
    x - the position
    
    返回:
    
    the knot number, or 1 if no knot found
  - randomize
```
public void randomize()
```
    Randomize the gradient.
  - mutate
```
public void mutate(float amount)
```
    Mutate the gradient.
    
    参数:
    
    amount - the amount in the range zero to one
  - randomGradient
```
public static Gradient randomGradient()
```
    Build a random gradient.
    
    返回:
    
    the new Gradient

类 Gradient

字段概要

从类继承的字段 org.meteoinfo.image.filter.ArrayColormap

构造器概要

方法概要

从类继承的方法 org.meteoinfo.image.filter.ArrayColormap

从类继承的方法 java.lang.Object

字段详细资料

RGB

HUE_CW

HUE_CCW

LINEAR

SPLINE

CIRCLE_UP

CIRCLE_DOWN

CONSTANT

构造器详细资料

Gradient

Gradient

Gradient

Gradient

方法详细资料

clone

copyTo

setColor

getNumKnots

setKnot

getKnot

setKnotType

getKnotType

setKnotBlend

getKnotBlend

addKnot

removeKnot

setKnots

setKnots

splitSpan

setKnotPosition

getKnotPosition

knotAt

randomize

mutate

randomGradient