add basic game object system

Makefile

@@ -6,10 +6,10 @@ OBJ_DIR := obj
 BIN_DIR := bin
 
 EXE := $(BIN_DIR)/out
-OBJ_OUT_DIRS := obj/Main obj/LuaHandler obj/Components obj/Components/Objects obj/Components/Objects/TopLevel
-SRC := $(SRC_DIR)/Main/Main.cpp $(SRC_DIR)/LuaHandler/LuaHandler.cpp $(SRC_DIR)/Components/GameObject.cpp
-OBJ := $(OBJ_DIR)/Main/Main.o $(OBJ_DIR)/LuaHandler/LuaHandler.o $(OBJ_DIR)/Components/GameObject.o
-CC := g++
+OBJ_OUT_DIRS := obj/Main obj/Components obj/Components obj/Components/TopLevel
+SRC := $(SRC_DIR)/Main/Main.cpp $(SRC_DIR)/Components/TopLevel/GameObject.cpp $(SRC_DIR)/Components/TopLevel/Game.cpp
+OBJ := $(OBJ_DIR)/Main/Main.o $(OBJ_DIR)/Components/TopLevel/GameObject.o $(OBJ_DIR)/Components/TopLevel/Game.o
+CC := g++ -std=c++17
 
 CPPFLAGS := -I/usr/include/$(LUA) -Iinclude -MMD -MP
 CFLAGS   := -Wall

Script.lua

@@ -1 +1,3 @@
-libepic.say_something("lol")
+for i, v in pairs(program.game:GetChildren()) do
+    print(v.name)
+end

include/Components/GameObject.hpp

@@ -1,19 +0,0 @@
-#ifndef _GAMEOBJECT_H
-#define _GAMEOBJECT_H
-
-#include <vector>
-
-struct GameObject {
-    const char* name;
-    bool is_top_level;
-
-    GameObject* parent;
-    std::vector<GameObject*> children;
-    std::map<std::string, std::vector<std::function<int(int)>>> handlers;
-
-    void add(GameObject* child);
-    std::vector<GameObject*>& get_children();
-    GameObject* get(const char* targetedName);
-};
-
-#endif

include/Components/TopLevel/Game.hpp

@@ -0,0 +1,14 @@
+#ifndef _GAME_H
+#define _GAME_H
+
+struct Game : public GameObject {
+    Game() : GameObject("game") {
+        std::cout << "[+] Game" << '\n';
+    }
+
+    bool isGame();
+};
+
+void registerGame(lua_State* L);
+
+#endif

include/Components/TopLevel/GameObject.hpp

@@ -0,0 +1,30 @@
+#ifndef _GAMEOBJECT_H
+#define _GAMEOBJECT_H
+
+#include <iostream>
+#include <vector>
+#include <map>
+#include <functional>
+extern "C" {
+#include <lua.h>
+#include <lauxlib.h>
+}
+
+struct GameObject {
+    GameObject(std::string name) : name(name) {}  
+
+    std::string name;
+    std::string type;
+
+    GameObject* parent;
+    std::vector<GameObject*> children;
+    std::map<std::string, std::function<void()>> handlers;
+
+    GameObject& Get(std::string name);
+    void Add(GameObject* obj);
+    std::vector<GameObject*>& GetChildren();
+};
+
+void registerGameObject(lua_State* L);
+
+#endif

include/LuaHandler/LuaHandler.hpp

@@ -1,18 +0,0 @@
-#ifndef _LUAHANDLER_H
-#define _LUAHANDLER_H
-
-extern "C"{
-#include <lua.h>
-#include <lauxlib.h>
-}
-
-struct LuaHandler {
-    lua_State* L;
-
-    LuaHandler(lua_State* L) : L(L) {};
-
-    void defineClass(const char* className);
-    void defineFunction(const char* className, const char* valueName, lua_CFunction func);
-};
-
-#endif

include/vendor/LuaBridge3

@@ -0,0 +1 @@
+Subproject commit d0a1debdaea96460b172c3847f0b1b7eaa6f76a2

src/Components/GameObject.cpp

@@ -1,27 +0,0 @@
-// Bruh.
-
-#include <LuaHandler/LuaHandler.hpp>
-#include <Components/GameObject.hpp>
-
-// todo: might want to make these static methods inside the gameobject class to make inheritence easier
-// also see this has an example http://lua-users.org/wiki/UserDataExample
-
-void GameObject::add(GameObject* child) {
-    this->children.push_back(child);
-}
-
-std::vector<GameObject*>& GameObject::get_children() {
-    return this->children;
-}
-
-GameObject* GameObject::get(const char* targetedName) {
-    // Yes, using a loop is inefficient or something
-    // Yes, an unsigned short can be a bit too small for this
-    // Eh, its fine
-    // FIXME: Also what if no child is found at all? Hmm well we could just return the target gameobject, that could work
-    for (unsigned short i = 0; i < this->children.size(); i++) {
-        if (this->children[i]->name == targetedName) {
-            return this->children[i];     
-        }
-    }
-}

src/Components/Objects/TopLevel/Game.cpp

@@ -1,5 +0,0 @@
-#include <Components/GameObject.cpp>
-
-class Game : public GameObject {
-    
-}

src/Components/TopLevel/Game.cpp

@@ -0,0 +1,17 @@
+#include <Components/TopLevel/GameObject.hpp>
+#include <Components/TopLevel/Game.hpp>
+
+#include <vendor/LuaBridge3/Source/LuaBridge/LuaBridge.h> // Pain
+
+bool Game::isGame() {
+    return true;
+}
+
+void registerGame(lua_State* L) {
+    luabridge::getGlobalNamespace (L)
+    .beginNamespace ("Core")
+        .deriveClass <Game, GameObject> ("Game")
+            .addFunction ("isGame", &Game::isGame)
+        .endClass ()
+    .endNamespace ();
+}

src/Components/TopLevel/GameObject.cpp

@@ -0,0 +1,35 @@
+#include <Components/TopLevel/GameObject.hpp>
+#include <vendor/LuaBridge3/Source/LuaBridge/LuaBridge.h> // Pain
+#include <vendor/LuaBridge3/Source/LuaBridge/Vector.h> // Pain
+
+std::vector<GameObject*>& GameObject::GetChildren() {
+    return this->children;
+}
+
+GameObject& GameObject::Get(std::string name) {
+    // NOTE(hippoz): This is a mess.
+    // Firstly, I should be using find_if, not a loop
+    // Secondly, why is this a short?
+    for (short i = this->children.size()-1; i >= 0; i--) {
+        if (this->children[i]->name == name) {
+            return *this->children[i];
+        }
+    }
+}
+
+void GameObject::Add(GameObject* gameObject) {
+    this->children.push_back(gameObject);
+}
+
+
+void registerGameObject(lua_State* L) {
+    luabridge::getGlobalNamespace (L)
+    .beginNamespace ("Core")
+        .beginClass <GameObject> ("GameObject")
+            .addProperty ("name", &GameObject::name)
+            .addFunction ("GetChildren", &GameObject::GetChildren)
+            .addFunction ("Add", &GameObject::Add)
+            .addFunction ("Get", &GameObject::Get)
+        .endClass ()
+    .endNamespace ();
+}

src/LuaHandler/LuaHandler.cpp

@@ -1,22 +0,0 @@
-#include <LuaHandler/LuaHandler.hpp>
-
-void LuaHandler::defineClass(const char* className) {
-    // Create a new table and assign it to a global variable
-    lua_newtable(L);
-    lua_setglobal(L, className);
-}
-
-void LuaHandler::defineFunction(const char* className, const char* valueName, lua_CFunction func) {
-    // Get the table that should have been defined with LuaHandler::defineClass
-    lua_getglobal(L, className);
-    
-    // Push the function name, as well as the function onto the stack
-    lua_pushstring(L, valueName);
-    lua_pushcfunction(L, func);
-
-    // Add the function inside the table, giving it the specified name
-    lua_settable(L, -3);
-
-    // Keep the stack balanced
-    lua_pop(L, 1);
-}

src/Main/Main.cpp

@@ -1,20 +1,43 @@
+extern "C" {
+#include <lua.h>
+#include <lualib.h>
+#include <lauxlib.h>
+}
+
 #include <iostream>
 
-#include <LuaHandler/LuaHandler.hpp>
+#include <vendor/LuaBridge3/Source/LuaBridge/LuaBridge.h> // Pain
+#include <Components/TopLevel/GameObject.hpp>
+#include <Components/TopLevel/Game.hpp>
 
-static int say_something(lua_State* L) {
-    std::cout << "something: " << lua_tostring(L, 1) << "\n";
-    return 1;
+static Game game;
+
+void registerInit(lua_State* L) {
+    registerGameObject(L);
+    registerGame(L);
+
+    luabridge::getGlobalNamespace (L)
+    .beginNamespace ("program")
+        .addProperty("game", &game)
+    .endNamespace ();
 }
 
 int main() {
+    GameObject gaming("gamer");
+    game.Add(&gaming);
+
     lua_State* L = luaL_newstate();
-    LuaHandler handler(L);
+    luaL_openlibs(L); // TODO: dangerous
 
-    handler.defineClass("libepic");
-    handler.defineFunction("libepic", "say_something", &say_something);
+    registerInit(L);
 
-    luaL_dofile(handler.L, "Script.lua");
+    int ret = luaL_dofile(L, "Script.lua");
+
+    if (ret != 0) {
+        std::cout << "[E] Error running main script." << '\n';
+        std::cout << "  -> " << lua_tostring(L, -1) << '\n';
+        return 2;
+    }
 
     return 0;
 }