eco2d/code/apps/client/source/main.c

#define ZPL_IMPL
#include "zpl.h"
#include "system.h"
#include "game.h"
#include "utils/options.h"

#define DEFAULT_WORLD_SEED 302097
#define DEFAULT_BLOCK_SIZE 64 /* amount of units within a block (single axis) */
#define DEFAULT_CHUNK_SIZE 3 /* amount of blocks within a chunk (single axis) */
#define DEFAULT_WORLD_SIZE 8 /* amount of chunks within a world (single axis) */

int main(int argc, char** argv)
{
    zpl_opts opts={0};
    zpl_opts_init(&opts, zpl_heap(), argv[0]);
    
    zpl_opts_add(&opts, "?", "help", "the HELP section", ZPL_OPTS_FLAG);
    zpl_opts_add(&opts, "s", "single-player", "play single-player game.", ZPL_OPTS_FLAG);
    zpl_opts_add(&opts, "c", "viewer-count", "number of viewers (detachable clients)", ZPL_OPTS_INT);
    zpl_opts_add(&opts, "p", "preview-map", "draw world preview", ZPL_OPTS_FLAG);
    zpl_opts_add(&opts, "s", "seed", "world seed", ZPL_OPTS_INT);
    zpl_opts_add(&opts, "r", "random-seed", "generate random world seed", ZPL_OPTS_FLAG);
    zpl_opts_add(&opts, "bs", "block-size", "amount of units within a block (single axis)", ZPL_OPTS_INT);
    zpl_opts_add(&opts, "cs", "chunk-size", "amount of blocks within a chunk (single axis)", ZPL_OPTS_INT);
    zpl_opts_add(&opts, "ws", "world-size", "amount of chunks within a world (single axis)", ZPL_OPTS_INT);
    
    uint32_t ok = zpl_opts_compile(&opts, argc, argv);
    
    if (!ok) {
        zpl_opts_print_errors(&opts);
        zpl_opts_print_help(&opts);
        return -1;
    }
    
    int8_t is_networked_play = !zpl_opts_has_arg(&opts, "single-player");
    int32_t seed = zpl_opts_integer(&opts, "seed", DEFAULT_WORLD_SEED);
    uint16_t num_viewers = zpl_opts_integer(&opts, "viewer-count", 1);
    uint16_t block_size = zpl_opts_integer(&opts, "block-size", DEFAULT_BLOCK_SIZE);
    uint16_t chunk_size = zpl_opts_integer(&opts, "chunk-size", DEFAULT_CHUNK_SIZE);
    uint16_t world_size = zpl_opts_integer(&opts, "world-size", DEFAULT_WORLD_SIZE);
    
    if (zpl_opts_has_arg(&opts, "random-seed")) {
        zpl_random rnd={0};
        zpl_random_init(&rnd);
        seed = zpl_random_gen_u32(&rnd);
        zpl_printf("Seed: %u\n", seed);
    }
    
    if (zpl_opts_has_arg(&opts, "preview-map")) {
        generate_minimap(seed, block_size, chunk_size, world_size);
        return 0;
    }
    
    sighandler_register();
    game_init(is_networked_play, num_viewers, seed, block_size, chunk_size, world_size);
        
    while (game_is_running()) {
        game_input();
        game_update();
        game_render();
    }

    game_shutdown();
    sighandler_unregister();
    
    zpl_opts_free(&opts);
    return 0;
}