colors.h
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	/***************************************************************************
	colors.h
	W. Michael Brown
	-------------------

	Storage and manipulation of colors.

	begin : Wed Jun 11 2003
	copyright : (C) 2003 by mbrown
	email : wmbrown@sandia.gov
	***************************************************************************/

	#ifndef COLORS_H
	#define COLORS_H

	#include "cartesian.h"
	#include <map>
	#include <string>
	#include <iostream>
	using namespace std;

	/// Class for dealing with RGB color space
	class Colors {
	public:
	Colors();
	~Colors();

	/// Return number of colors in the map
	unsigned size();

	/// Return the color in the gradient between start and end
	/** \param start Starting value
	* \param end Ending Value
	* \param value Color in gradient determined for value
	* relative to start and end
	* \param startcolor Starting color for the gradient
	* \param endcolor Ending color for the gradient */
	colorPt gradient(double start, double end, double value,
	const colorPt &startcolor, const colorPt &endcolor);
	/// Three color gradient
	/** \sa gradient() */
	colorPt gradient(double start, double mid, double end, double value,
	const colorPt &startcolor, const colorPt &midcolor,
	const colorPt &endcolor);

	/// Output the colors to standard out
	void outputcolors();
	/// Return a string with the list of available colors
	string colorlist();

	/// Return an RGB color based on name
	colorPt operator[](const string &name);

	private:
	map<string, colorPt> colors;
	};

	#endif