#ifndef __COLOR_H__
#define __COLOR_H__

#include <iostream.h>

// @@@@@@@@@@@@@@@@@@@@@ Color3 class @@@@@@@@@@@@@@@@
class Color3 { // holds an red,green,blue 3-tuple
public:
	float red, green, blue;
	Color3(){red = green = blue = 0;}
	Color3(float r, float g, float b){red = r; green = g; blue = b;}
	Color3(Color3& c){red = c.red; green = c.green; blue = c.blue;}
	void set(float r, float g, float b){red = r; green = g; blue = b;}
	void set(Color3& c) 
      {red = c.red; green = c.green; blue = c.blue;}
	void add(float r, float g, float b)
      {red += r; green += g; blue += b;}
	void add(Color3& src, Color3& refl)
	{ // add the product of source color and reflection coefficient
		red   += src.red   * refl.red;
		green += src.green * refl.green; 
		blue  += src.blue  * refl.blue;
	}
	void add(Color3& colr)
	{ // add colr to this color
	 red += colr.red ; green += colr.green; blue += colr.blue;}
	void build4tuple(float v[])
	{// load 4-tuple with this color: v[3] = 1 for homogeneous
		v[0] = red; v[1] = green; v[2] = blue; v[3] = 1.0f;
	}

	// I/O methods
	friend istream& operator>>(istream& in, Color3& c)
	  {
	    in >> c.red >> c.green >> c.blue;
	    return in;
	  }
	friend ostream& operator<<(ostream& out, const Color3& c)
	  {
	    out << c.red << " " << c.green << " " << c.blue << " ";
	    return out;
	  }
};

#endif