eco2d/code/game/source/packets/pkt_01_welcome.c

#include "packets/pkt_01_welcome.h"
#include "packet.h"
#include "world/world.h"
#include "game.h"
#include "entity_view.h"
#include "camera.h"

pkt_desc pkt_01_welcome_desc[] = {
    { PKT_FIELD(CWP_ITEM_POSITIVE_INTEGER, pkt_01_welcome, ent_id) },
    { PKT_FIELD(CWP_ITEM_POSITIVE_INTEGER, pkt_01_welcome, chunk_size) },
    { PKT_FIELD(CWP_ITEM_POSITIVE_INTEGER, pkt_01_welcome, world_size) },
    { PKT_END },
};

size_t pkt_01_welcome_encode(pkt_01_welcome *table) {
    cw_pack_context pc = {0};
    pkt_pack_msg(&pc, pkt_pack_desc_args(pkt_01_welcome_desc));
    pkt_pack_struct(&pc, pkt_01_welcome_desc, PKT_STRUCT_PTR(table));
    return pkt_pack_msg_size(&pc);
}
size_t pkt_01_welcome_send(uint64_t peer_id,
                           uint16_t view_id,
                           uint64_t ent_id,
                           uint16_t chunk_size,
                           uint16_t world_size) {
    pkt_01_welcome table = {.ent_id = ent_id, .chunk_size = chunk_size, .world_size = world_size};
    return pkt_world_write(MSG_ID_01_WELCOME, pkt_01_welcome_encode(&table), 1, view_id, (void*)peer_id);
}

int32_t pkt_01_welcome_handler(pkt_header *header) {
    pkt_01_welcome table;
    PKT_IF(pkt_msg_decode(header, pkt_01_welcome_desc, pkt_pack_desc_args(pkt_01_welcome_desc), PKT_STRUCT_PTR(&table)));
    
    world_view *view = game_world_view_get(header->view_id);

    zpl_printf("[INFO] initializing read-only world view ...\n");
    world_view_init(view, table.ent_id, table.chunk_size, table.world_size);
    game_world_view_set_active(view);
    return 0;
}