cuber/cuber.cpp

#define GLFW_INCLUDE_NONE

#include <csignal>

#include "GLFW/glfw3.h"
#include "asio.hpp"

#include "cbt/opengl/context.hpp"
#include "scenes/cube.hpp"

auto main(int, char const*[]) -> int {
    auto ctx = cbt::opengl::context("cuber", 1280, 720);

    if (!ctx.valid()) {
        return 1;
    }

    auto scn = cbt::scenes::cube();
    if (!scn.init()) {
        return 1;
    }

    // signal handling
    asio::io_context io;
    asio::signal_set signals(io, SIGINT, SIGTERM);
    bool quit = false;

    signals.async_wait([&](auto, auto) {
        quit = true;
        io.stop();
    });

    auto process_signals = [&]() -> void {
        while (io.poll()) {}
    };

    // render loop
    auto prev = std::chrono::steady_clock::now();

    while (!ctx.should_close()) {
        process_signals();

        if (quit || glfwGetKey(ctx.raw(), GLFW_KEY_Q) == GLFW_PRESS) {
            break;
        }

        auto now = std::chrono::steady_clock::now();
        auto dt = std::chrono::duration<float>(now - prev).count();
        prev = now;

        scn.update(dt);
        scn.render();

        ctx.swap_buffers();
        ctx.poll_events();
    }

    return 0;
}