imbored/render_donut.cpp at master · ohmdelta/imbored · GitHub

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#include <iostream>
#include <sys/ioctl.h>
#include <stdio.h>
#include <memory>
#include <unistd.h>
#include <thread>

#include <ncurses.h>

#include "renderer.hpp"
#include "lin_alg.hpp"

using namespace lin_alg;
using namespace renderer;

TransformationMatrix set_transformation_angle_z(TransformationMatrix transformation, double angle)
{
    transformation(0, 0) = std::cos(angle);
    transformation(0, 2) = -std::sin(angle);
    transformation(2, 0) = std::sin(angle);
    transformation(2, 2) = std::cos(angle);
    return transformation;
}

TransformationMatrix set_transformation_angle_y(TransformationMatrix transformation, double angle)
{
    transformation(1, 1) = std::cos(angle);
    transformation(1, 2) = -std::sin(angle);
    transformation(2, 1) = std::sin(angle);
    transformation(2, 2) = std::cos(angle);
    return transformation;
}

int main()
{
    struct winsize w;
    ioctl(STDOUT_FILENO, TIOCGWINSZ, &w);

    size_t rows = w.ws_row - 1;
    size_t cols = w.ws_col - 1;
    initscr();
    start_color();
    for(size_t i=1; i <= 8; i++)
        init_pair(i, i, COLOR_BLACK);
    printf("lines %ld\n", rows);
    printf("columns %ld\n", cols);
    World world(cols, rows, 3, 500);
    std::shared_ptr<TerminalDisplay> t = std::make_shared<TerminalDisplay>(cols, rows, 2);

    // auto z = 50;
    auto light_source_1 = LightSource(
        0, 1.0,
        std::make_shared<Sphere>(
            40,
            Coordinate(800, -400, 0)));

    auto donut_1 = std::make_shared<Torus>(
        40,
        80);

    auto donut_2 = std::make_shared<Torus>(
        40,
        80);

    // auto y = -50;
    TransformationMatrix transformation = Identity();
    TransformationMatrix transformation2 = Identity();
    double angle_ = M_PI_2;
    transformation2(0, 0) = std::cos(angle_);
    transformation2(0, 1) = -std::sin(angle_);
    transformation2(1, 0) = std::sin(angle_);
    transformation2(1, 1) = std::cos(angle_);

    TransformationMatrix transformation3 = Identity();
    transformation3(1, 1) = std::cos(angle_);
    transformation3(1, 2) = -std::sin(angle_);
    transformation3(2, 1) = std::sin(angle_);
    transformation3(2, 2) = std::cos(angle_);

    transformation2 = transformation3 * transformation2;

    TransformationMatrix transformation4 = Identity();
    angle_ = M_PI_4;
    transformation4(0, 0) = std::cos(angle_);
    transformation4(0, 1) = -std::sin(angle_);
    transformation4(1, 0) = std::sin(angle_);
    transformation4(1, 1) = std::cos(angle_);

    auto angle = 0.0;

    auto triangle = std::make_shared<Triangle>(
        lin_alg::Coordinate(0, 100, 0), lin_alg::Coordinate(0, 0, -100));
    triangle->set_origin(Coordinate(1200, -160, -240));
    triangle->rotate(transformation4);

    auto plane = std::make_shared<CheckerBoard>(
        lin_alg::Coordinate(0, 100, 0),
        lin_alg::Coordinate(0, -1, 0),
        lin_alg::Coordinate(0.01, 0, 0));

    double y = -160;
    bool dir_down = true;

    auto sphere = std::make_shared<Sphere>(
        40,
        Coordinate(1200, -160, -240));

    world.add_light_source(light_source_1);

    world.add_object(plane);

    world.add_object(donut_1);
    world.add_object(donut_2);
    world.add_object(sphere);
    world.add_object(triangle);

    donut_1->set_origin(Coordinate(1200, -80, 0));
    donut_2->set_origin(Coordinate(1200, -90, 240));

    for (int i = 0; ; (i = (i + 1) % 8))
    {
        t->clear();
        world.ray_trace_perspective(t);
        // world.render_perspective(t);
        clear();
        int c = i + 1;
        attron(COLOR_PAIR(c));

        auto v = t->render_to_c_str();
        for(int i=0; i<v.size; i++)
            addch(v.s[i]);
        // printw("%s", v.s);
        refresh();
        transformation = set_transformation_angle_z(transformation, angle);
        donut_1->set_rotation(transformation);
        donut_2->set_rotation(transformation * transformation2);
        // auto sphere = std::make_shared<Sphere>(
        sphere->set_origin(Coordinate(1200, y, -240));

        if (dir_down)
        {
            y += 5;
        }
        else
        {
            y -= 5;
        }

        if (y > 0 || y < -160)
        {
            dir_down ^= 1;
        }

        angle += M_PI_2 / 32;
        attroff(COLOR_PAIR(c));
        std::this_thread::sleep_for(std::chrono::milliseconds(30));
    }

    endwin();
    return 0; // make sure your main returns int
}