snoopy/src/main.cpp

#include "colour.h"
#include "camera.h"
#include "material.h"
#include "image.h"
#include "world.h"
#include "network.h"

#include <iostream>
#include <string.h>

void render(camera& cam, const world& world, int client_sock)
{
    for (int j = HEIGHT - 1; j >= 0; --j)
    {
        std::cerr << "\rScanlines remaining: " << j << ' ' << std::flush;
        for (int i = 0; i < WIDTH; ++i)
        {
            colour pixel_colour(0,0,0);

            for (int s = 0; s < SAMPLES_PER_PIXEL; ++s)
            {
                auto u = (i + math::random_double()) / (WIDTH-1);
                auto v = (j + math::random_double()) / (HEIGHT-1);
                ray r = cam.get_ray(u, v);
                pixel_colour += trace(world, r, MAX_DEPTH);
            }

            // TODO: we should instead write our output to some buffer in memory
            // to decouple our ultimate output from our rendering
            //write_colour_to_stream(std::cout, pixel_colour, SAMPLES_PER_PIXEL);
            write_colour_to_socket(client_sock, pixel_colour, SAMPLES_PER_PIXEL);
        }
    }
}

int main()
{
    int sockfd;
    int newsockfd = wait_for_client(sockfd);

    printf("got a connection!\n");

    send_image_dimensions(newsockfd, WIDTH, HEIGHT);

    //std::cout << "P3\n" << WIDTH << ' ' << HEIGHT << "\n255\n";

    auto dist_to_target = 10.0;
    auto dist_to_focus = dist_to_target + 1.0;
    auto cam_y = 1.0;
    point3 lookfrom(0,cam_y,-dist_to_target);
    point3 lookat(0,0,0);
    vec3 vup(0,1,0);
    auto aperture = 0.5;

    camera cam(lookfrom, lookat, vup, 47, ASPECT_RATIO, aperture, dist_to_focus);

    const world* world = world::close_glass_sphere();

    render(cam, *world, newsockfd);

    // close client socket
    close(newsockfd);

    printf("closed client connection\n");

    // close listening socket
    close(sockfd);

    printf("closed listening socket\n");

    printf("done!\n");

    return 0;
}