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Plot::ColorLookupTable< PixelType, Scale > Class Template Reference

#include <colorlookup.h>

Inheritance diagram for Plot::ColorLookupTable< PixelType, Scale >:

[legend]Collaboration diagram for Plot::ColorLookupTable< PixelType, Scale >:

[legend]List of all members.

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Detailed Description

template<class PixelType = Plot::RGBPixel<>, class Scale = Scale::Linear<double>>
class Plot::ColorLookupTable< PixelType, Scale >

Base class for a finite array of possible colors that can be returned when given a magnitude.

At present a new lookup table is constructed again every time an object of a derived type is created, which is undesirable. Some form of caching should be implemented.

Currently requires an RGB pixel type.

Definition at line 213 of file colorlookup.h.

Public Methods
	ColorLookupTable (size_t numcolors, const Scale &scale=default_scale)
	ColorLookupTable (const string &spec_="", size_t numcolors=0, const Scale &scale=default_scale)
	Constructor accepting a string specification whose characters each stand for colors between which to interpolate.
bool	is_valid ()
	Returns true if no errors were found during construction.
Protected Types
typedef std::vector< PixelType >	Table
Protected Methods
void	interpolate (const size_t start, const size_t finish, const PixelType &startcolor, const PixelType &finishcolor)
	Fill the lookup table (or a portion of it) with linear interpolations between two colors.
PixelType	color (const char c)
	Returns a color given a one-character name.
Protected Attributes
Table	colors
bool	valid

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Constructor & Destructor Documentation

template<class PixelType = Plot::RGBPixel<>, class Scale = Scale::Linear<double>> Plot::ColorLookupTable< PixelType, Scale >::ColorLookupTable (  const string &    spec_ = "", size_t    numcolors = 0, const Scale &    scale = default_scale )  [inline]

Constructor accepting a string specification whose characters each stand for colors between which to interpolate. See the color() routine below for the supported colors and characters. Inspired by Yoonsuck Choe's Java colormap class. Might consider making the numcolors odd and adding a special entry for the top of the range to make the range inclusive. This might be more intuitive and would make plotting inversely-scaled items (with a reversed color order) match regularly-scaled ones. Definition at line 234 of file colorlookup.h. References Plot::ColorLookupTable< PixelType, Scale >::color(), and Plot::ColorLookupTable< PixelType, Scale >::interpolate().

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Member Function Documentation

template<class PixelType = Plot::RGBPixel<>, class Scale = Scale::Linear<double>> PixelType Plot::ColorLookupTable< PixelType, Scale >::color (  const char    c )  [inline, protected]

Returns a color given a one-character name. Uppercase is full-strength, lowercase is half-strength. Definition at line 286 of file colorlookup.h. Referenced by Plot::ColorLookupTable< PixelType, Scale >::ColorLookupTable().

template<class PixelType = Plot::RGBPixel<>, class Scale = Scale::Linear<double>> void Plot::ColorLookupTable< PixelType, Scale >::interpolate (  const size_t    start, const size_t    finish, const PixelType &    startcolor, const PixelType &    finishcolor )  [inline, protected]

Fill the lookup table (or a portion of it) with linear interpolations between two colors. The upper array index and finishcolor are exclusive. Definition at line 264 of file colorlookup.h. Referenced by Plot::ColorLookupTable< PixelType, Scale >::ColorLookupTable().

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The documentation for this class was generated from the following file:

• colorlookup.h

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