Making multpilayer

README.md

@@ -28,7 +28,8 @@ sudo apt install \
     libglm-dev \
     libspdlog-dev \
     libfmt-dev \
-    libgl1-mesa-dev
+    libgl1-mesa-dev \
+    libimgui-dev
 ```
 
 ## Building

deerith_engine_client/CMakeLists.txt

@@ -37,4 +37,9 @@ add_custom_target(DeerithClientShaders ALL
         ${CMAKE_CURRENT_BINARY_DIR}/shaders
 )
 
+target_compile_definitions(DeerithClient
+    PUBLIC
+        DEERITH_CLIENT
+)
+
 add_dependencies(DeerithClient DeerithClientShaders)

deerith_engine_client/include/deerith/network/network.h

@@ -1 +0,0 @@
-#

deerith_engine_client/include/deerith/universe/universe.h

@@ -0,0 +1,8 @@
+#pragma once
+
+namespace deerith
+{
+    void begin_connection_to_universe(const char *address, int port);
+    void shutdown_universe();
+    bool is_universe_running();
+}

deerith_engine_client/src/graphics/window.cpp

@@ -1,5 +1,7 @@
 #include "deerith/graphics/window.h"
 #include "primitive_internals.h"
+#include "../network/network_internals.h"
+#include <deerith/universe/universe.h>
 
 #include <glad/gl.h>
 #include <GLFW/glfw3.h>
@@ -71,6 +73,7 @@ int deerith::init_window()
 
     init_primitives();
     init_imgui();
+    init_network();
 
     return 0;
 }
@@ -128,6 +131,8 @@ void deerith::shutdown_window()
     ImGui::DestroyContext();
 
     shutdown_primitives();
+    shutdown_universe();
+    shutdown_network();
 
     glfwDestroyWindow(window);
     glfwTerminate();

deerith_engine_client/src/network/network.cpp

@@ -0,0 +1,63 @@
+#include <deerith/core/log.h>
+#include <enet/enet.h>
+
+#include <deerith/core/log.h>
+
+#include <thread>
+
+#include "network_internals.h"
+
+namespace deerith
+{
+    ENetHost *client;
+    ENetPeer *client_peer;
+}
+
+void deerith::connect_to_server(const char *address, int port)
+{
+    ENetAddress eaddress = {0};
+    eaddress.port = port;
+
+    int result = enet_address_set_host(&eaddress, address);
+    deerith_client_assert(result == 0, "connect_to_server invalid address");
+
+    client = enet_host_create(NULL, 1, 2, 0, 0);
+    deerith_client_assert(client, "connect_to_server failed to create host");
+
+    client_peer = enet_host_connect(client, &eaddress, 2, 0);
+    deerith_client_assert(client_peer, "enet_host_connect failed on connect_to_server");
+}
+
+int deerith::init_network()
+{
+    if (enet_initialize() != 0)
+    {
+        deerith_client_error("An error occurred while initializing ENet.\n");
+        return 1;
+    }
+
+    return 0;
+}
+
+void deerith::shutdown_network()
+{
+    enet_deinitialize();
+}
+
+bool deerith::wait_till_connected_to_server()
+{
+    ENetEvent event;
+    if (enet_host_service(client, &event, 5000) > 0 &&
+        event.type == ENET_EVENT_TYPE_CONNECT)
+    {
+        deerith_client_info("Connected to server");
+        return true;
+    }
+
+    else
+    {
+        enet_peer_reset(client_peer);
+        deerith_client_error("Failed to connect to server");
+        return false;
+    }
+}

deerith_engine_client/src/network/network_internals.h

@@ -0,0 +1,10 @@
+#pragma once
+
+namespace deerith
+{
+    int init_network();
+    void shutdown_network();
+
+    void connect_to_server(const char *address, int port);
+    bool wait_till_connected_to_server();
+}

deerith_engine_client/src/universe/universe.cpp

@@ -0,0 +1,60 @@
+#include <deerith/universe/universe.h>
+#include <deerith/core/log.h>
+
+#include "../network/network_internals.h"
+
+#include <thread>
+#include <memory>
+
+namespace deerith
+{
+    std::unique_ptr<std::thread> universe_thread = {};
+    std::atomic<bool> universe_running = false;
+
+    void universe_simulation();
+}
+
+void deerith::begin_connection_to_universe(const char *address, int port)
+{
+    deerith_core_assert(!universe_running, "begin_connection_to_universe failed because there is a current running universe");
+
+    if (universe_thread && universe_thread->joinable())
+        universe_thread->join();
+
+    universe_thread.reset();
+
+    connect_to_server(address, port);
+
+    universe_running = true;
+    universe_thread = std::make_unique<std::thread>(universe_simulation);
+}
+
+bool deerith::is_universe_running()
+{
+    return universe_running;
+}
+
+void deerith::universe_simulation()
+{
+    bool connected = wait_till_connected_to_server();
+
+    if (connected)
+    {
+        while (universe_running)
+        {
+            deerith_client_trace("another thread");
+            std::this_thread::sleep_for(std::chrono::milliseconds(100));
+        }
+    }
+
+    deerith_client_trace("Thread stop");
+    universe_running = false;
+}
+
+void deerith::shutdown_universe()
+{
+    if (universe_thread && universe_thread->joinable())
+        universe_thread->join();
+    universe_running = false;
+    universe_thread.reset();
+}

deerith_engine_core/CMakeLists.txt

@@ -1,5 +1,18 @@
 add_library(DeerithCore)
 
+find_path(ENET_INCLUDE_DIR enet/enet.h)
+find_library(ENET_LIBRARY enet)
+
+include(FetchContent)
+
+FetchContent_Declare(
+    EnTT
+    GIT_REPOSITORY https://github.com/skypjack/entt.git
+    GIT_TAG v3.16.0
+)
+
+FetchContent_MakeAvailable(EnTT)
+
 find_package(spdlog REQUIRED)
 find_package(fmt REQUIRED)
 find_package(glm REQUIRED)
@@ -17,6 +30,7 @@ target_sources(DeerithCore
 target_include_directories(DeerithCore
     PUBLIC
         ${CMAKE_CURRENT_SOURCE_DIR}/include
+        ${ENET_INCLUDE_DIR}
 )
 
 target_link_libraries(DeerithCore
@@ -24,4 +38,5 @@ target_link_libraries(DeerithCore
         spdlog::spdlog
         fmt::fmt
         glm::glm
+        ${ENET_LIBRARY}
 )

deerith_engine_core/include/deerith/engine.h

@@ -0,0 +1,7 @@
+#pragma once
+
+namespace deerith
+{
+    void init_engine();
+    void shutdown_enigne();
+}

deerith_engine_server/CMakeLists.txt

@@ -19,3 +19,8 @@ target_link_libraries(DeerithServer
     PUBLIC
         DeerithCore
 )
+
+target_compile_definitions(DeerithServer
+    PUBLIC
+        DEERITH_SERVER
+)

deerith_engine_server/include/universe/universe.h

@@ -0,0 +1,9 @@
+#pragma once
+
+namespace deerith
+{
+    void init_universe_serve(int port);
+    void shutdown_universe();
+
+    bool is_universe_running();
+}

deerith_engine_server/src/network/network.cpp

@@ -0,0 +1,63 @@
+#include <deerith/core/log.h>
+#include <enet/enet.h>
+
+#include <deerith/core/log.h>
+
+#include <thread>
+
+#include "network_internals.h"
+
+namespace deerith
+{
+    ENetHost *client;
+    ENetPeer *client_peer;
+}
+
+void deerith::connect_to_server(const char *address, int port)
+{
+    ENetAddress eaddress = {0};
+    eaddress.port = port;
+
+    int result = enet_address_set_host(&eaddress, address);
+    deerith_client_assert(result == 0, "connect_to_server invalid address");
+
+    client = enet_host_create(NULL, 1, 2, 0, 0);
+    deerith_client_assert(client, "connect_to_server failed to create host");
+
+    client_peer = enet_host_connect(client, &eaddress, 2, 0);
+    deerith_client_assert(client_peer, "enet_host_connect failed on connect_to_server");
+}
+
+int deerith::init_network()
+{
+    if (enet_initialize() != 0)
+    {
+        deerith_client_error("An error occurred while initializing ENet.\n");
+        return 1;
+    }
+
+    return 0;
+}
+
+void deerith::shutdown_network()
+{
+    enet_deinitialize();
+}
+
+bool deerith::wait_till_connected_to_server()
+{
+    ENetEvent event;
+    if (enet_host_service(client, &event, 5000) > 0 &&
+        event.type == ENET_EVENT_TYPE_CONNECT)
+    {
+        deerith_client_info("Connected to server");
+        return true;
+    }
+
+    else
+    {
+        enet_peer_reset(client_peer);
+        deerith_client_error("Failed to connect to server");
+        return false;
+    }
+}

deerith_engine_server/src/network/network_internals.h

@@ -0,0 +1,9 @@
+#pragma once
+
+namespace deerith
+{
+    int init_network();
+    void shutdown_network();
+
+    void init_server(int port);
+}

sandbox/CMakeLists.txt

@@ -23,11 +23,21 @@ target_link_libraries(SandboxClient
         DeerithClient
 )
 
+target_include_directories(SandboxClient
+    PRIVATE
+        ${CMAKE_CURRENT_SOURCE_DIR}/src
+)
+
 add_executable(SandboxServer
     ${SANDBOX_COMMON}
     ${SANDBOX_SERVER}
 )
 
+target_include_directories(SandboxServer
+    PRIVATE
+        ${CMAKE_CURRENT_SOURCE_DIR}/src
+)
+
 target_link_libraries(SandboxServer
     PRIVATE
         DeerithServer

sandbox/src/client/window.cpp

@@ -2,6 +2,7 @@
 #include <deerith/graphics/primitive.h>
 #include <deerith/graphics/input.h>
 #include <deerith/core/core.h>
+#include <deerith/universe/universe.h>
 #include <iostream>
 #include <math.h>
 #include <imgui.h>
@@ -10,6 +11,9 @@
 
 glm::vec2 player_pos(5, 5);
 
+char net_address[16] = "127.0.0.1";
+int port = 8080;
+
 float vel = 1;
 
 int main(int args_count, const char **args)
@@ -37,8 +41,22 @@ int main(int args_count, const char **args)
         {
             ImGui::SliderFloat("Velocity", &vel, 0, 4);
 
-            ImGui::End();
+            if (deerith::is_universe_running())
+            {
+                ImGui::Text("Universe running");
             }
+            else
+            {
+                ImGui::InputText("Net Address", net_address, 16);
+                ImGui::InputInt("Net port", &port);
+
+                if (ImGui::Button("Connect"))
+                {
+                    deerith::begin_connection_to_universe(net_address, port);
+                }
+            }
+        }
+        ImGui::End();
 
         deerith::finish_window_display();
     }

sandbox/src/client/window.h

@@ -0,0 +1,3 @@
+#pragma once
+
+void execute_window();

sandbox/src/common/main.cpp

@@ -0,0 +1,24 @@
+
+#include <deerith/core/core.h>
+#include <deerith/core/log.h>
+#include <deerith/engine.h>
+
+#ifdef DEERITH_SERVER
+#include <client/
+#endif
+
+#ifdef DEERITH_CLIENT
+#endif
+
+int main()
+{
+    deerith::init_deerith_core();
+
+    int init_result = deerith::init_window();
+    if (init_result != 0)
+    {
+        return init_result;
+    }
+
+    deerith::shutdown_enigne();
+}