ucar.unidata.ui.colortable
Class ColorTableDefaults

java.lang.Object
  ucar.unidata.ui.colortable.ColorTableDefaults

public class ColorTableDefaults
extends Object

A class to provide color tables suitable for data displays. Uses some code by Ugo Taddei. All methods are static.

Version:

$Id: ColorTableDefaults.java,v 1.15 2007/05/04 19:56:06 jeffmc Exp $

Field Summary

static String

NAME_DEFAULT The name of the "default" color table

Constructor Summary

ColorTableDefaults()

Method Summary

static float[][]	allOneColor(Color color) Make a color table representing this color.
static float[][]	allOneColor(Color color, boolean addAlpha) Make a color table representing this color.
static float[][]	bright12() Make 12 color bright spectrum; blue (lo) to red (hi)
static float[][]	bright14() Make 14 color bright spectrum; blue (lo) to red (hi)
static float[][]	bright16() Make 16 color bright spectrum; blue (lo) to red (hi)
static float[][]	bright38() Make a 38-color bright spectrum; blue (low values) to red (high values).
static ColorTable	createColorTable(ArrayList l, String name, String category, float[][] table) Create a ColorTable and add it to the given list
static ColorTable	createColorTable(ArrayList l, String name, String category, float[][] table, boolean tableFlipped) Create a ColorTable and add it to the given list
static ColorTable	createColorTable(ArrayList l, String name, String category, float[][] table, boolean tableFlipped, Range range) Create a ColorTable and add it to the given list
static ColorTable	createColorTable(String name, String category, float[][] table) Create a ColorTable and add it to the given list
static ArrayList	createColorTables() Create the default color tables
static float[][]	DZ1() Make a color table for radar reflectivity as close as possible to the one used by the NWS in their web page displays of same.
static float[][]	DZ2() A 2nd color table for radar reflectivity, better than DZ1 for VisAD.
static float[][]	grayTable(int numColors, boolean inverse) Make a color table ranging from black to white; linear changes in RGB amounts.
static float[][]	grayTable1(int len) Make a color table ranging from black to white; linear changes in RGB amounts.
static float[][]	invRainbow(int len) Make the standard VisAD inverse rainbow (red to blue) table with definable length; created by by Ugo Taddei.
static void	main(String[] args) Main method
static List	makeGempakColorTables(String name, String category, String file) Make GEMPAK color tables
static List	makeNclRgbColorTables(String name, String cat, String file, String contents) Make ColorTables from NCAR Command Language (NCL) RGB files
static List	makeRgbColorTables(String name, String cat, String file) Make color tables from RGB files
static List	makeRgbColorTables(String name, String cat, String file, List lines, String delimiter) Make color tables from RGB tuples in a file
static float[][]	makeTableFromAct(String name) Read in and process the act color table
static float[][]	makeTableFromET(String name) Read in and process the mcidas color table
static float[][]	makeTableFromET(String name, boolean fromAuxdata) Read in and process the mcidas color table
static float[][]	makeTableFromPal(String name) Read in and process the pal color table
static float[][]	makeTableFromPal1(String name) Read in and process the pal1 color table
static float[][]	makeTableFromPal2(String name) Read in and process the pal2 color table
static float[][]	percentBlue(int len) Make a color table ranging from white to dark blue, typically for parms with 0 to 100%.
static float[][]	percentYelGrnBlue(int len) Make a color table ranging from yellow to blue, through green; typically for parms with values spanning 0 to 100 %.
static float[][]	percentYellowBlue(int len) Make a color table ranging from yellow to dark blue, typically for parms with 0 to 100%.
static float[][]	precipCT1() Make The first standard Unidata MetApps liquid precip amount color table.
static float[][]	rainbow(int len) Make the standard VisAD rainbow (blue lo to red high) color table with definable length.
static float[][]	temperatureCT1() Make the first temperature color table.
static float[][]	temperatureCT2() Make a bright temperature spectrum; blue (lo) to red (hi) 5 deg C steps or bands; some duplicate colors below 0 Length is fixed at 21 for now.
static float[][]	temperatureCT3() Make a third temperature spectrum; NEEDS WORK setRange() to -55 to 50 Celsius
static float[][]	temperatureCT4() Make the fourth temperature color table.
static float[][]	topographyCT() Provide a color table suitable for topography
static float[][]	windspeed() make the nominal wind speed color table, based on color table temperatureCT4.
static float[][]	windSpeed(int len) Make a color table ranging from white to dark blue (negatives); white to green going 0 to large positive.

Methods inherited from class java.lang.Object

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

Field Detail

NAME_DEFAULT

public static final String NAME_DEFAULT

The name of the "default" color table

See Also:

Constant Field Values

Constructor Detail

ColorTableDefaults

public ColorTableDefaults()

Method Detail

createColorTable

public static ColorTable createColorTable(String name,
                                          String category,
                                          float[][] table)

Create a ColorTable and add it to the given list

Parameters:

name - The CT name

category - Its category

table - The actual data

Returns:

The color table

createColorTable

public static ColorTable createColorTable(ArrayList l,
                                          String name,
                                          String category,
                                          float[][] table)

Create a ColorTable and add it to the given list

Parameters:

l - List to add the ColorTable to

name - The CT name

category - Its category

table - The actual data

Returns:

The color table

createColorTable

public static ColorTable createColorTable(ArrayList l,
                                          String name,
                                          String category,
                                          float[][] table,
                                          boolean tableFlipped)

Create a ColorTable and add it to the given list

Parameters:

l - List to add the ColorTable to

name - The CT name

category - Its category

table - The actual data

tableFlipped - If true then the table data is not in row major order

Returns:

The color table

createColorTable

public static ColorTable createColorTable(ArrayList l,
                                          String name,
                                          String category,
                                          float[][] table,
                                          boolean tableFlipped,
                                          Range range)

Create a ColorTable and add it to the given list

Parameters:

l - List to add the ColorTable to

name - The CT name

category - Its category

table - The actual data

tableFlipped - If true then the table data is not in row major order

range - the color table range

Returns:

The color table

createColorTables

public static ArrayList createColorTables()

Create the default color tables

Returns:

List of color tables

rainbow

public static final float[][] rainbow(int len)
                               throws IllegalArgumentException

Make the standard VisAD rainbow (blue lo to red high) color table with definable length.

Parameters:

len - length; how many entries desired in the color table.

Returns:

float[3][len] the color table

Throws:

IllegalArgumentException - from construction of VisAd objects

temperatureCT1

public static final float[][] temperatureCT1()
                                      throws IllegalArgumentException

Make the first temperature color table. Pale blue to dark blue in lower bins, for below 0 C or 273.15 Kelvin; white thru yellow, orange, red-orange to red in upper bins over 0 C to 50C. designed for 5-degrees-wide Celcius bands. SHOULD do scalarMap.setRange -85 to +50 Celsius.

Returns:

float[3][27] the color table

Throws:

IllegalArgumentException - from construction of VisAd objects

temperatureCT4

public static final float[][] temperatureCT4()
                                      throws IllegalArgumentException

Make the fourth temperature color table. This is notably better than temperature color tables CT1, CT2, or CT3. SHOULD also set the data's scalarMap.setRange -90 to +45 Celsius. for temperature to lock blue transition to freezing point. also happens to make a good color table for wind speed 0 to 60 m/s or so.

Returns:

float[3][135] the color table

Throws:

IllegalArgumentException - from construction of VisAd objects

temperatureCT2

public static final float[][] temperatureCT2()

Make a bright temperature spectrum; blue (lo) to red (hi) 5 deg C steps or bands; some duplicate colors below 0 Length is fixed at 21 for now. setRange() to -55 to 50 Celsius This looks better than tempCT1 in VisAD 3D surfaces; worse in 2D.

Returns:

float[3][21] the color table

temperatureCT3

public static final float[][] temperatureCT3()

Make a third temperature spectrum; NEEDS WORK setRange() to -55 to 50 Celsius

Returns:

float[2][21] the color table

precipCT1

public static final float[][] precipCT1()
                                 throws IllegalArgumentException

Make The first standard Unidata MetApps liquid precip amount color table. Pale blue to dark blue to green to yellow, to orange, to red-orange to red. Length 100. SHOULD also do Contour2DDisplayable::setRangeforColor(0.0, 25.0) so that first color band (above black) starts at 25/100 = 0.25.

Returns:

float[3][100] the color table

Throws:

IllegalArgumentException - from construction of VisAd objects

invRainbow

public static final float[][] invRainbow(int len)
                                  throws IllegalArgumentException

Make the standard VisAD inverse rainbow (red to blue) table with definable length; created by by Ugo Taddei.

Parameters:

len - length; how many entries desired in the color table.

Returns:

float[3][len] the color table

Throws:

IllegalArgumentException - from construction of VisAd objects

percentBlue

public static final float[][] percentBlue(int len)
                                   throws IllegalArgumentException

Make a color table ranging from white to dark blue, typically for parms with 0 to 100%. setRange of values 0.0 to 100.0 Used for relative humidity, probability of precip (rain, snow); fog.

Parameters:

len - length; how many entries desired in the color table.

Returns:

float[3][len] the color table

Throws:

IllegalArgumentException - from construction of VisAd objects

grayTable

public static final float[][] grayTable(int numColors,
                                        boolean inverse)
                                 throws IllegalArgumentException

Make a color table ranging from black to white; linear changes in RGB amounts.

Parameters:

numColors - number of descrete colors for the table

inverse - true for white to black instead of black to white

Returns:

float[3][len] the color table

Throws:

IllegalArgumentException - from construction of VisAd objects

grayTable1

public static final float[][] grayTable1(int len)
                                  throws IllegalArgumentException

Make a color table ranging from black to white; linear changes in RGB amounts. Offset; begins at X gray25, RGB = 64, 64, 64 out of 255

Parameters:

len - length; how many entries desired in the color table.

Returns:

float[3][len] the color table

Throws:

IllegalArgumentException - from construction of VisAd objects

percentYellowBlue

public static final float[][] percentYellowBlue(int len)
                                         throws IllegalArgumentException

Make a color table ranging from yellow to dark blue, typically for parms with 0 to 100%. setRange of values 0.0 to 100.0 Can use for relative humidity, probability of precip. Problem: 50% RH color is dull grey; see percentYelGrnBlue()

Parameters:

len - length; how many entries desired in the color table.

Returns:

float[3][len] the color table

Throws:

IllegalArgumentException - from construction of VisAd objects

percentYelGrnBlue

public static final float[][] percentYelGrnBlue(int len)
                                         throws IllegalArgumentException

Make a color table ranging from yellow to blue, through green; typically for parms with values spanning 0 to 100 %. setRange of values 0.0 to 100.0. Can use for relative humidity, probability of precip, etc. Espcially good where a higher percewnt is associated with mnore moisture.

Parameters:

len - length; how many entries desired in the color table.

Returns:

float[3][len] the color table

Throws:

IllegalArgumentException - from construction of VisAd objects

windSpeed

public static final float[][] windSpeed(int len)
                                 throws IllegalArgumentException

Make a color table ranging from white to dark blue (negatives); white to green going 0 to large positive. center SetRange of values on 0.0 for proper alignment with colors. Used for speed of wind components u and v, which can have negative speeds.

Parameters:

len - length; how many entries desired in the color table.

Returns:

float[3][len] the color table

Throws:

IllegalArgumentException - from construction of VisAd objects

bright38

public static final float[][] bright38()

Make a 38-color bright spectrum; blue (low values) to red (high values). These are close to or at the brightest possible colors. Good for general purpose with higher values needing warmer colors.

Returns:

float[3][38] the color table

bright16

public static final float[][] bright16()

Make 16 color bright spectrum; blue (lo) to red (hi)

Returns:

float[3][16] the color table

bright14

public static final float[][] bright14()

Make 14 color bright spectrum; blue (lo) to red (hi)

Returns:

float[3][14] the color table

bright12

public static final float[][] bright12()

Make 12 color bright spectrum; blue (lo) to red (hi)

Returns:

float[3][12] the color table

topographyCT

public static final float[][] topographyCT()

Provide a color table suitable for topography

Returns:

float[3][256] the color table

allOneColor

public static final float[][] allOneColor(Color color)

Make a color table representing this color.

Parameters:

color - color to use

Returns:

the color table this color

allOneColor

public static final float[][] allOneColor(Color color,
                                          boolean addAlpha)

Make a color table representing this color.

Parameters:

color - color to use

addAlpha - true to add an alpha channel

Returns:

the color table this color

DZ1

public static final float[][] DZ1()

Make a color table for radar reflectivity as close as possible to the one used by the NWS in their web page displays of same. It turns out that this color table used in VisAD makes a crummy appearence (due to VisAD blurring colors between values?). Smoother transistions of color do much better in VisAD displays, such as in color table DZ2 below. for data displayed, setRange() 0 to 80 (dbz); 16 bins

Returns:

float[3][16] the color table

DZ2

public static final float[][] DZ2()

A 2nd color table for radar reflectivity, better than DZ1 for VisAD. for data displayed, setRange() -10.0 to 60.0 (dbz); 16 bins. by Stu Wier.

Returns:

float[3][16] the color table

windspeed

public static final float[][] windspeed()
                                 throws IllegalArgumentException

make the nominal wind speed color table, based on color table temperatureCT4. set the data's scalarMap.setRange from 0.0 to say 70 or 80.0 m/s

Returns:

float[3][70] the color table

Throws:

IllegalArgumentException - from construction of VisAd objects

makeTableFromET

public static final float[][] makeTableFromET(String name)
                                       throws IllegalArgumentException

Read in and process the mcidas color table

Parameters:

name - File name

Returns:

The processed CT data

Throws:

IllegalArgumentException

makeTableFromET

public static final float[][] makeTableFromET(String name,
                                              boolean fromAuxdata)
                                       throws IllegalArgumentException

Read in and process the mcidas color table

Parameters:

name - File name

fromAuxdata - Is this file from the auxdata dir

Returns:

The processed CT data

Throws:

IllegalArgumentException - When bad things happen

makeTableFromPal1

public static final float[][] makeTableFromPal1(String name)
                                         throws IOException

Read in and process the pal1 color table

Parameters:

name - File name

Returns:

The processed CT data

Throws:

IOException - On badness

makeTableFromPal2

public static final float[][] makeTableFromPal2(String name)
                                         throws IOException

Read in and process the pal2 color table

Parameters:

name - File name

Returns:

The processed CT data

Throws:

IOException - On badness

makeGempakColorTables

public static List makeGempakColorTables(String name,
                                         String category,
                                         String file)

Make GEMPAK color tables

Parameters:

name - name of the table

category - the category

file - the file to read

Returns:

a list of colors in the table (why a list, I don't know)

main

public static void main(String[] args)
                 throws Exception

Main method

Parameters:

args - arguments

Throws:

Exception - something bad happened

makeNclRgbColorTables

public static List makeNclRgbColorTables(String name,
                                         String cat,
                                         String file,
                                         String contents)
                                  throws IOException

Make ColorTables from NCAR Command Language (NCL) RGB files

Parameters:

name - name of table

cat - category

file - the file

contents - the file contents

Returns:

the color table in a List

Throws:

IOException - problem opening file

makeRgbColorTables

public static List makeRgbColorTables(String name,
                                      String cat,
                                      String file,
                                      List lines,
                                      String delimiter)

Make color tables from RGB tuples in a file

Parameters:

name - the name of the color table

cat - the category

file - the file to read

lines - the lines

delimiter - the rgb tuple delimiters

Returns:

the color table in a list

makeRgbColorTables

public static List makeRgbColorTables(String name,
                                      String cat,
                                      String file)
                               throws IOException

Make color tables from RGB files

Parameters:

name - name of the color table

cat - category

file - the file to read

Returns:

the color table in a List

Throws:

IOException - problem reading the file

makeTableFromAct

public static final float[][] makeTableFromAct(String name)
                                        throws IOException

Read in and process the act color table

Parameters:

name - File name

Returns:

The processed CT data

Throws:

IOException - On badness

makeTableFromPal

public static final float[][] makeTableFromPal(String name)
                                        throws IOException

Read in and process the pal color table

Parameters:

name - File name

Returns:

The processed CT data

Throws:

IOException - On badness