color.h

#pragma once
#include "vec3.h"

#include <iostream>

void write_color(std::ostream &out, color pixel_color) {
    // Write the translated [0,255] value of each color component.
    out << static_cast<int>(255.999 * pixel_color.x()) << ' '
        << static_cast<int>(255.999 * pixel_color.y()) << ' '
        << static_cast<int>(255.999 * pixel_color.z()) << '\n';
}

void write_color(std::ostream &out, color pixel_color, int samples_per_pixel) {
    float r = pixel_color.x();
    float g = pixel_color.y();
    float b = pixel_color.z();

    // Divide the color by the number of samples.
    float scale = 1.0 / samples_per_pixel;
    r = sqrt(r * scale);
    g = sqrt(g * scale);
    b = sqrt(b * scale);

    // Write the translated [0,255] value of each color component.
    out << static_cast<int>(256 * clamp(r, 0.0, 0.999)) << ' '
        << static_cast<int>(256 * clamp(g, 0.0, 0.999)) << ' '
        << static_cast<int>(256 * clamp(b, 0.0, 0.999)) << '\n';
}