main.c

#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>

#include "SolarSystem.h"
#include "Vector2.h"
// #include "gfx/gfx.h"

#define SCREEN_WIDTH 1000
#define SCREEN_HEIGHT 1000

int main() {
    // srand(time(NULL));
    srand(0);

    struct gfx_context_t *context = gfx_create("Solar System", SCREEN_WIDTH, SCREEN_HEIGHT);

    if (!context) {
        fprintf(stderr, "Graphics initialization failed!\n");
        return EXIT_FAILURE;
    }

    int32_t time_elapsing_per_second = 3600 * 24 * 100;
    int32_t refresh_rate = 240;
    int32_t elapsed_time = 0;
    double sleep_duration = 1.0 / refresh_rate * 1E9;

    SolarSystem *solar_system = solar_system_create(time_elapsing_per_second / refresh_rate);

    int64_t tmp = time(NULL) % 1000;

    while (true) {
        solar_system_update(solar_system);
        gfx_present(context);
        solar_system_draw(solar_system, context);

        if (elapsed_time % refresh_rate == 0) {
            char title[100];
            sprintf(title, "Solar System (%d : %ld)", elapsed_time / refresh_rate, (time(NULL) - tmp) % 1000);
            SDL_SetWindowTitle(context->window, title);
        }

        if (gfx_keypressed() == SDLK_ESCAPE)
            break;
        struct timespec t = {.tv_sec = 0, .tv_nsec = sleep_duration};
        nanosleep(&t, NULL);
        elapsed_time += 1;
    }

    gfx_destroy(context);
    return EXIT_SUCCESS;
}