Initial commit.

Shared/CMakeLists.txt

@@ -0,0 +1,6 @@
+file(GLOB_RECURSE MY_SOURCES CONFIGURE_DEPENDS
+    "*.cpp"
+    "*.h"
+)
+
+add_library(Shared ${MY_SOURCES})

Shared/Events.h

@@ -0,0 +1,91 @@
+#pragma once
+#include <unordered_map>
+#include <vector>
+#include <functional>
+#include <typeindex>
+#include <any>
+#include <algorithm>
+
+class EventTarget {
+public:
+    template<typename T>
+    using Callback = std::function<void(const T &)>;
+    
+    // Subscribe to an event type.
+    template<typename T>
+    uint64_t listen(Callback<T> callback) {
+        auto type = std::type_index(typeid(T));
+        auto & vec = callbacks[type];
+        
+        uint64_t id = nextEventId++;
+        
+        vec.emplace_back([cb = std::move(callback)](const std::any & e) {
+            cb(std::any_cast<const T &>(e));
+        });
+        return id;
+    }
+    
+    // Unsubscribe a specific listener.
+    template<typename T>
+    void unlisten(uint64_t id) {
+        _unlisten(std::type_index(typeid(T)), id);
+    }
+    
+    // Synchronously dispatch an event.
+    template<typename T>
+    void dispatch(const T & event) {
+        auto it = callbacks.find(std::type_index(typeid(T)));
+        if (it == callbacks.end()) return;
+        
+        // Copy the list in case a callback unsubscribes during dispatch.
+        auto copy = it->second;
+        for (const auto & cb : copy) {
+            cb(event);
+        }
+    }
+    
+    // Should be called on a main loop to dispatch queued events.
+    void processQueue() {
+        for (auto & [anyEvent, copy] : queued) {
+            auto it = callbacks.find(anyEvent.type());
+            if (it != callbacks.end()) {
+                for (const auto & cb : copy) {
+                    cb(anyEvent);
+                }
+            }
+        }
+        queued.clear();
+    }
+    
+    // Queue an event to be dispatched on the next call to `processQueue`.
+    template<typename T>
+    void queue(const T & event) {
+        auto type = std::type_index(typeid(T));
+        auto it = callbacks.find(type);
+        if (it == callbacks.end()) return;
+        queued.emplace_back(std::any(event), it->second);
+    }
+    
+private:
+    using AnyCallback = std::function<void(const std::any &)>;
+    using CallbackWithId = std::pair<AnyCallback, uint64_t>;
+    
+    std::unordered_map<std::type_index, std::vector<AnyCallback>> callbacks {};
+    std::vector<std::pair<std::any, std::vector<AnyCallback>>> queued {};
+    
+    uint64_t nextEventId = 0;
+
+    void _unlisten(std::type_index type, uint64_t id) {
+//        auto it = callbacks.find(type);
+//        if (it == callbacks.end()) return;
+//
+//        auto & vec = it->second;
+//        auto erase_it = std::find_if(vec.begin(), vec.end(),
+//            [id](const auto& p) { return p.second == id; });
+//
+//        if (erase_it != vec.end()) {
+//            *erase_it = std::move(vec.back());
+//            vec.pop_back();
+//        }
+    }
+};

Shared/Network/Connection.cpp

@@ -0,0 +1,148 @@
+#include <string>
+#include <thread>
+
+#include <ngtcp2/ngtcp2_crypto.h>
+#include <ngtcp2/ngtcp2_crypto_gnutls.h>
+#include <gnutls/crypto.h>
+#include <cista.h>
+
+#include "Connection.h"
+
+namespace Artifact {
+
+Connection::Connection() {
+    ngtcp2_settings_default(&settings);
+    ngtcp2_transport_params_default(&transportParams);
+    transportParams.initial_max_streams_bidi = 1;
+    transportParams.initial_max_data = 65535;
+    transportParams.initial_max_stream_data_bidi_local = 65535;
+    
+    callbacks.encrypt = ngtcp2_crypto_encrypt_cb;
+    callbacks.decrypt = ngtcp2_crypto_decrypt_cb;
+    callbacks.hp_mask = ngtcp2_crypto_hp_mask_cb;
+    callbacks.update_key = ngtcp2_crypto_update_key_cb;
+    callbacks.delete_crypto_aead_ctx = ngtcp2_crypto_delete_crypto_aead_ctx_cb;
+    callbacks.delete_crypto_cipher_ctx = ngtcp2_crypto_delete_crypto_cipher_ctx_cb;
+    callbacks.get_path_challenge_data = ngtcp2_crypto_get_path_challenge_data_cb;
+    callbacks.rand = [](auto dest, auto len, auto ctx) {
+        gnutls_rnd(GNUTLS_RND_RANDOM, dest, len);
+    };
+    callbacks.get_new_connection_id = [](auto conn, auto cid, auto token, auto cidlen, auto userdata) {
+        gnutls_rnd(GNUTLS_RND_RANDOM, cid, cidlen);
+        gnutls_rnd(GNUTLS_RND_RANDOM, token, NGTCP2_STATELESS_RESET_TOKENLEN);
+        return 0;
+    };
+    callbacks.version_negotiation = ngtcp2_crypto_version_negotiation_cb;
+    
+    gnutls_rnd(GNUTLS_RND_RANDOM, dcid.data, dcid.datalen);
+    gnutls_rnd(GNUTLS_RND_RANDOM, scid.data, scid.datalen);
+}
+
+void readPacket(ngtcp2_pkt_info * info, void * packet) {
+    
+}
+
+ClientConnection::ClientConnection(std::string host, std::string port) {
+    struct addrinfo hints;
+    struct addrinfo * local = nullptr;
+    struct addrinfo * remote = nullptr;
+    getaddrinfo("::", "", &hints, &local);
+    getaddrinfo(host.c_str(), port.c_str(), &hints, &remote);
+    ngtcp2_path path = {
+        .local = {
+            .addr = local->ai_addr,
+            .addrlen = local->ai_addrlen
+        },
+        .remote = {
+            .addr = remote->ai_addr,
+            .addrlen = remote->ai_addrlen
+        }
+    };
+    
+    if (gnutls_init(&session, GNUTLS_CLIENT) != GNUTLS_E_SUCCESS) {
+        throw std::runtime_error("Failed to initialize gnutls.");
+    }
+    gnutls_set_default_priority(session);
+    
+    ngtcp2_conn_client_new(&conn, &dcid, &scid, &path, NGTCP2_PROTO_VER_V1, &callbacks, &settings, &transportParams, nullptr, this);
+    ngtcp2_conn_set_tls_native_handle(conn, session);
+}
+
+ServerConnection::ServerConnection(ngtcp2_path path) : path(path) {
+    if (gnutls_init(&session, GNUTLS_CLIENT) != GNUTLS_E_SUCCESS) {
+        throw std::runtime_error("Failed to initialize gnutls.");
+    }
+    gnutls_set_default_priority(session);
+    
+    ngtcp2_conn_server_new(&conn, &dcid, &scid, &path, NGTCP2_PROTO_VER_V1, &callbacks, &settings, &transportParams, nullptr, this);
+    ngtcp2_conn_set_tls_native_handle(conn, session);
+}
+
+ServerListener::ServerListener(std::string port) {
+    struct addrinfo hints;
+    struct addrinfo * local = nullptr;
+    getaddrinfo("::", "", &hints, &local);
+    
+    socketDescriptor = socket(local->ai_family, local->ai_socktype, local->ai_protocol);
+    
+    int on = 1;
+    setsockopt(socketDescriptor, SOL_SOCKET, SO_REUSEADDR, reinterpret_cast<char *>(&on), sizeof(int));
+    
+    if (local->ai_family == AF_INET6) {
+        int off = 0;
+        setsockopt(socketDescriptor, IPPROTO_IPV6, IPV6_V6ONLY, reinterpret_cast<char *>(&off), sizeof(int));
+    }
+    
+    if (bind(socketDescriptor, local->ai_addr, local->ai_addrlen)) {
+        // Save our actual local address for later use.
+        getsockname(socketDescriptor, reinterpret_cast<sockaddr *>(&localAddr.addr), &localAddr.addrlen);
+    }
+}
+
+void ServerListener::onReadable(struct ev_loop *, ev_io * watcher, int) {
+    auto self = static_cast<ServerListener *>(watcher->data);
+    
+    uint8_t buf[2048];
+    ngtcp2_addr remote;
+    auto len = recvfrom(self->socketDescriptor, buf, sizeof(buf), 0, remote.addr, &remote.addrlen);
+    
+    ngtcp2_pkt_info pi{};
+    ngtcp2_pkt_hd hd{};
+    ngtcp2_pkt_decode_hd_long(&hd, buf, len);
+    
+    auto it = self->connections.find(hd.dcid);
+    if (it != self->connections.end()) {
+        ServerConnection * conn = it->second.get();
+        
+        ngtcp2_conn_read_pkt(conn->conn, &conn->path, &pi, buf, len, std::chrono::steady_clock::now().time_since_epoch().count());
+        
+        conn->readPacket(&pi, buf);
+        return;
+    }
+    
+    if (hd.flags & NGTCP2_PKT_FLAG_LONG_FORM && hd.type == NGTCP2_PKT_INITIAL) {
+        ngtcp2_pkt_hd accept_hd{};
+        if (ngtcp2_accept(&accept_hd, buf, static_cast<size_t>(len)) != 0) {
+            return;
+        }
+        
+        auto new_conn = std::make_unique<ServerConnection>(ngtcp2_path {
+            .local = self->localAddr,
+            .remote = remote
+        });
+        
+        self->connections[accept_hd.dcid] = std::move(new_conn);
+    }
+}
+
+void ServerListener::run() {
+    std::thread([this]() {
+        loop = ev_loop_new(EVFLAG_AUTO);
+        ev_io_init(&watcher, onReadable, socketDescriptor, EV_READ);
+        watcher.data = this;
+        ev_io_start(loop, &watcher);
+        ev_run(loop, 0);
+    }).detach();
+}
+
+}

Shared/Network/Connection.h

@@ -0,0 +1,95 @@
+#pragma once
+
+#include <string>
+#include <unordered_map>
+
+#include <ngtcp2/ngtcp2.h>
+#include <gnutls/gnutls.h>
+#include <ev.h>
+
+// Platform-specific socket includes and helpers
+#ifdef _WIN32
+    #include <winsock2.h>
+    #include <ws2tcpip.h>
+    #pragma comment(lib, "ws2_32.lib")
+    using socket_t = SOCKET;
+    #define CLOSE_SOCKET closesocket
+    #define SOCKLEN_T int
+    #define IS_INVALID_SOCKET(s) ((s) == INVALID_SOCKET)
+    #define GET_LAST_ERROR() WSAGetLastError()
+#else
+    #include <sys/socket.h>
+    #include <netinet/in.h>
+    #include <arpa/inet.h>
+    #include <unistd.h>
+    #include <errno.h>
+    #include <netdb.h>
+    using socket_t = int;
+    #define CLOSE_SOCKET close
+    #define SOCKLEN_T socklen_t
+    #define IS_INVALID_SOCKET(s) ((s) < 0)
+    #define GET_LAST_ERROR() errno
+#endif
+
+namespace Artifact {
+
+namespace {
+
+struct Ngtcp2CidEqual {
+    bool operator()(const ngtcp2_cid& a, const ngtcp2_cid& b) const noexcept {
+        return a.datalen == b.datalen &&
+               std::memcmp(a.data, b.data, a.datalen) == 0;
+    }
+};
+
+struct Ngtcp2CidHash {
+    size_t operator()(const ngtcp2_cid& cid) const noexcept {
+        size_t h = cid.datalen;
+        for (uint8_t i = 0; i < cid.datalen; ++i) {
+            h = (h * 31) ^ cid.data[i];   // or better hash as above
+        }
+        return h;
+    }
+};
+
+}
+
+class Connection {
+public:
+    ngtcp2_settings settings;
+    ngtcp2_transport_params transportParams;
+    ngtcp2_callbacks callbacks;
+    ngtcp2_cid dcid, scid;
+    gnutls_session_t session;
+    ngtcp2_conn * conn;
+    
+    Connection();
+
+    void readPacket(ngtcp2_pkt_info * info, void * packet);
+};
+
+class ClientConnection: public Connection {
+public:
+    ClientConnection(std::string host, std::string port);
+};
+
+class ServerConnection: public Connection {
+public:
+    ngtcp2_path path;
+    ServerConnection(ngtcp2_path path);
+};
+
+class ServerListener {
+    socket_t socketDescriptor;
+    std::unordered_map<ngtcp2_cid, std::unique_ptr<ServerConnection>, Ngtcp2CidHash, Ngtcp2CidEqual> connections;
+    ngtcp2_addr localAddr;
+    
+    struct ev_loop * loop;
+    ev_io watcher;
+public:
+    ServerListener(std::string port);
+    static void onReadable(struct ev_loop *, ev_io * watcher, int);
+    void run();
+};
+
+}

Shared/Network/Network.cpp

@@ -0,0 +1,31 @@
+#include "Network.h"
+
+namespace Artifact {
+
+void NetworkServer::host(NetworkClient * local) {
+    if (active) {
+        unhost();
+    }
+    
+    active = true;
+    localClient = local;
+    listener = local->listen<Events::NetworkMessage>([](auto ev) {
+        
+    });
+}
+
+void NetworkServer::unhost() {
+    active = false;
+    if (localClient) {
+        localClient->unlisten<Events::NetworkMessage>(listener);
+        localClient = nullptr;
+    } else if (server) {
+        server = nullptr;
+    }
+}
+
+void NetworkClient::connect(NetworkServer * local) {
+    localServer = local;
+}
+
+}

Shared/Network/Network.h

@@ -0,0 +1,45 @@
+#pragma once
+
+#include "Shared.h"
+#include "Events.h"
+#include "Connection.h"
+
+namespace Artifact {
+
+namespace Events {
+
+struct NetworkMessage {
+    void * data;
+};
+
+}
+
+class NetworkClient;
+
+class NetworkServer: public BaseSubsystem, public EventTarget {
+    NetworkClient * localClient = nullptr;
+    std::unique_ptr<ServerListener> server = nullptr;
+    bool active = false;
+    uint64_t listener;
+public:
+    
+    void host(NetworkClient * client);
+    void host(std::string port);
+    
+    void unhost();
+};
+
+class NetworkClient: public BaseSubsystem, public EventTarget {
+    NetworkServer * localServer = nullptr;
+    std::unique_ptr<Connection> server = nullptr;
+    bool active = false;
+    uint64_t listener;
+public:
+    
+    void connect(NetworkServer * local);
+    void connect(std::string host, std::string port);
+    
+    void disconnect();
+};
+
+}

Shared/Shared.cpp

@@ -0,0 +1,7 @@
+#include "Shared.h"
+
+namespace Artifact {
+
+
+
+}

Shared/Shared.h

@@ -0,0 +1,86 @@
+#pragma once
+
+#include <vector>
+
+#include <glm/glm.hpp>
+
+namespace std {
+
+template<>
+struct hash<glm::ivec3> {
+    std::size_t operator()(const glm::ivec3& v) const noexcept {
+        // Very common and reasonably good quality combination for floats
+        // (tries to mix bits while being fast)
+
+        std::size_t seed = 0;
+
+        // You can use any of these styles — pick one:
+
+        // ────────────────────────────────────────────────────────────────
+        // Style 1: Boost hash_combine pattern (very popular)
+        auto hash_float = [](float f) -> std::size_t {
+            return std::hash<float>{}(f);
+        };
+
+        seed ^= hash_float(v.x) + 0x9e3779b9 + (seed << 6) + (seed >> 2);
+        seed ^= hash_float(v.y) + 0x9e3779b9 + (seed << 6) + (seed >> 2);
+        seed ^= hash_float(v.z) + 0x9e3779b9 + (seed << 6) + (seed >> 2);
+
+        // ────────────────────────────────────────────────────────────────
+        // Style 2: Simpler — fold with multiplication (often enough)
+        // seed = std::hash<float>{}(v.x);
+        // seed = seed * 31 + std::hash<float>{}(v.y);
+        // seed = seed * 31 + std::hash<float>{}(v.z);
+
+        // ────────────────────────────────────────────────────────────────
+        // Style 3: Treat as 12-byte blob → good quality, but slower on some platforms
+        // std::size_t h = 0;
+        // std::memcpy(&h, &v, sizeof(float));           // x
+        // h ^= std::hash<std::uint32_t>{}(h);
+        // std::memcpy(&h, reinterpret_cast<const char*>(&v) + 4, sizeof(float));
+        // h ^= std::hash<std::uint32_t>{}(h) * 0x85ebca6b;
+        // std::memcpy(&h, reinterpret_cast<const char*>(&v) + 8, sizeof(float));
+        // return std::hash<std::uint32_t>{}(h);
+
+        return seed;
+    }
+};
+
+} // namespace std
+
+namespace Artifact {
+
+template<typename Subsystem>
+class Engine {
+public:
+    std::vector<std::unique_ptr<Subsystem>> subsystems;
+    
+    template <typename T, typename... Args>
+    T * addSubsystem(Args &&... args) {
+        auto system = std::make_unique<T>(std::forward<Args>(args)...);
+        auto ptr = system.get();
+        subsystems.push_back(std::move(system));
+        return ptr;
+    }
+    template <typename T>
+    T * subsystem() const {
+        for (const auto & system : subsystems) {
+            if (T * ptr = dynamic_cast<T *>(system.get())) {
+                return ptr;
+            }
+        }
+        return nullptr;
+    }
+};
+
+class BaseSubsystem {
+public:
+    Engine<BaseSubsystem> * engine = nullptr;
+    virtual void init() {}
+    virtual void reload() {}
+    virtual void deinit() {}
+    virtual void render() {}
+    virtual void tick() {}
+};
+
+}

Shared/World/Chunk.h

@@ -0,0 +1,9 @@
+#include <vector>
+
+#include <glm/glm/glm.hpp>
+
+struct Chunk {
+    glm::ivec3 pos;
+    std::vector<uint16_t> data;
+    bool dirty = false;
+};