org.epics.graphene

Class NumberColorMaps

java.lang.Object

org.epics.graphene.NumberColorMaps

public class NumberColorMaps
extends Object

A utility class that provides implementations of NumberColorMap, a set standard utilities and a directory for color maps.

Author:

carcassi

Field Summary

Fields

Modifier and Type	Field and Description
static NumberColorMap	BONE BONE ranges from black to white passing from blue.
static NumberColorMap	GRAY GRAY ranges from black to white.
static NumberColorMap	HOT HOT ranges from black to white passing from red and yellow.
static NumberColorMap	HSV HSV goes through the color wheel: red, yellow, green, cyan, blue, magenta and back to red.
static NumberColorMap	JET JET ranges from blue to red, going through cyan and yellow.

Constructor Summary

Constructors

Constructor and Description
NumberColorMaps()

Method Summary

Methods

Modifier and Type	Method and Description
static Map<String,NumberColorMap>	getRegisteredColorSchemes() A set of registered color maps available to all applications.
static NumberColorMapInstance	optimize(NumberColorMapInstance instance, Range range) Returns a new optimized instance created by pre-calculating the colors in the given range and storing them in an array.
static NumberColorMapInstance	optimize(NumberColorMapInstance instance, Range oldRange, Range newRange) TODO: what is this about?

Methods inherited from class java.lang.Object

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

Field Detail

JET

public static final NumberColorMap JET

JET ranges from blue to red, going through cyan and yellow.

GRAY

public static final NumberColorMap GRAY

GRAY ranges from black to white.

BONE

public static final NumberColorMap BONE

BONE ranges from black to white passing from blue.

HOT

public static final NumberColorMap HOT

HOT ranges from black to white passing from red and yellow.

HSV

public static final NumberColorMap HSV

HSV goes through the color wheel: red, yellow, green, cyan, blue, magenta and back to red. Useful for periodic functions.

Constructor Detail

NumberColorMaps

public NumberColorMaps()

Method Detail

getRegisteredColorSchemes

public static Map<String,NumberColorMap> getRegisteredColorSchemes()

A set of registered color maps available to all applications.

Returns:

a set of color maps and their names

optimize

public static NumberColorMapInstance optimize(NumberColorMapInstance instance,
                              Range range)

Returns a new optimized instance created by pre-calculating the colors in the given range and storing them in an array.

An optimized map will trade off precision for speed. The color will not change smoothly but will be quantized to the size of the array.

Parameters:

instance - the color map instance to optimize

range - the range of values to optimize

Returns:

the optimized map

optimize

public static NumberColorMapInstance optimize(NumberColorMapInstance instance,
                              Range oldRange,
                              Range newRange)

TODO: what is this about?

Parameters:

instance -

oldRange -

newRange -

Returns: