Get an opengl window showing.

CMakeLists.txt

@@ -5,12 +5,10 @@ project(SimpleEngine)
 # Add some CMake options:
 option(SIMPLE_ENGINE_BUILD_EXAMPLES "Build example projects" ON)
 
-set(SFML_BUILD_AUDIO ON)
+find_package(GLEW REQUIRED)
-set(SFML_BUILD_GRAPHICS ON)
+find_package(glfw3 CONFIG REQUIRED)
-set(SFML_BUILD_WINDOW ON)
+find_package(glm CONFIG REQUIRED)
-set(SFML_BUILD_SYSTEM ON)
+find_package(soil2 CONFIG REQUIRED)
-
-find_package(SFML 2 COMPONENTS system main window graphics audio REQUIRED)
 
 # Link sources
 file(GLOB_RECURSE source_list src/*.cpp)
@@ -20,13 +18,15 @@ add_library(simpleengine STATIC ${source_list})
 target_include_directories(simpleengine PUBLIC include PRIVATE include/simpleengine)
 
 # Link dependencies
-target_link_libraries(simpleengine PUBLIC sfml-system sfml-main sfml-window sfml-network sfml-graphics sfml-audio OpenGL Freetype OpenAL Vorbis FLAC)
+target_link_libraries(simpleengine PUBLIC GLEW::GLEW)
-#target_link_libraries(simpleengine PUBLIC FLAC OpenAL OpenGL Vorbis)
+target_link_libraries(simpleengine PUBLIC glfw)
+target_link_libraries(simpleengine PUBLIC glm::glm)
+target_link_libraries(simpleengine PUBLIC soil2)
 
 # Add examples as a target if the user has them enabled
 if (SIMPLE_ENGINE_BUILD_EXAMPLES)
     add_subdirectory(examples)
 endif()
 
-# Set C++ standard to C++17
+# Set C++ standard to C++20
-set_target_properties(simpleengine PROPERTIES CXX_STANDARD 17 CXX_EXTENSIONS OFF)
+set_target_properties(simpleengine PROPERTIES CXX_STANDARD 20 CXX_EXTENSIONS OFF)

examples/CMakeLists.txt

@@ -1,3 +1,2 @@
 # Add examples as a subdirectory
-add_subdirectory(snake)
+add_subdirectory(dev_testing)
-add_subdirectory(animation)

examples/dev_testing/CMakeLists.txt

@@ -0,0 +1,15 @@
+cmake_minimum_required (VERSION 3.6)
+project(DevTesting DESCRIPTION "A testing project for engine developers.")
+
+add_executable(dev_testing src/main.cpp)
+
+# Link headers and source files.
+file(GLOB_RECURSE source_list src/*.cpp)
+target_sources(dev_testing PRIVATE ${source_list})
+target_include_directories(dev_testing PUBLIC include)
+
+# Link simpleengine
+target_link_libraries(dev_testing PUBLIC simpleengine)
+
+# Set standard to C++20
+set_target_properties(dev_testing PROPERTIES CXX_STANDARD 20 CXX_EXTENSIONS OFF)

examples/dev_testing/src/main.cpp

@@ -0,0 +1,15 @@
+//
+// Created by SeanOMik on 7/2/2020.
+// Github: https://github.com/SeanOMik
+//
+
+#include <simpleengine/game.h>
+
+#include <chrono>
+#include <iostream>
+
+int main(int argc, char *argv[]) {
+    simpleengine::Game game(1280, 720, "SimpleEngine - Developer Testing", false);
+
+    return game.run();
+}

include/simpleengine/game.h

@@ -1,145 +1,44 @@
 //
 // Created by SeanOMik on 7/2/2020.
 // Github: https://github.com/SeanOMik
-// Email: seanomik@gmail.com
 //
 
 #ifndef SIMPLEENGINE_GAME_H
 #define SIMPLEENGINE_GAME_H
 
-#include <SFML/Graphics.hpp>
+#include <string>
-#include <SFML/System.hpp>
+#include <memory>
-#include <SFML/Audio.hpp>
 
-#include <SFML/Window/Event.hpp>
+#include <gl/glew.h>
-
+#include <GLFW/glfw3.h>
-#include <functional>
-
-#include "entity.h"
-#include "events/collision_handler.h"
 
 namespace simpleengine {
-    class Event;
-
     class Game {
     public:
         friend class CollisionHandler;
         
-        Game(int w, int h, const std::string& window_name);
+        /**
-        Game(const sf::Vector2u& window_size, const std::string& window_name);
+         * @brief Construct a new Game object. Initializes GLEW and OpenGL
+         * 
+         * @param w Width of viewport
+         * @param h Height of viewport
+         * @param window_name The name of the window
+         */
+        Game(int w, int h, const std::string& window_name, const bool& resizeable = false);
         virtual ~Game();
 
-        void UpdateSFMLEvents();
+        void update();
-        void Update();
+        void render_window();
-        void RenderWindow();
+        void render_items();
-        void RenderItems();
+        void exit();
-        void ExitGame();
+        int run();
-        int Run();
 
-        void AddEvent(Event* event);
+        //void AddEvent(Event* event);
-        sf::RenderWindow* GetWindow();
+        std::shared_ptr<GLFWwindow> get_window();
-
-        template<sf::Event::EventType type, class _Fty>
-        void AddEventCallback(const std::function<_Fty>& func) {
-            if constexpr (type == sf::Event::Closed) {
-                close_event.Add(func);
-            } else if constexpr (type == sf::Event::Resized) {
-                resized_event.Add(func);
-            } else if constexpr (type == sf::Event::LostFocus) {
-                lost_focus_event.Add(func);
-            } else if constexpr (type == sf::Event::GainedFocus) {
-                gained_focus_event.Add(func);
-            } else if constexpr (type == sf::Event::TextEntered) {
-                text_entered_event.Add(func);
-            } else if constexpr (type == sf::Event::KeyPressed) {
-                key_pressed_event.Add(func);
-            } else if constexpr (type == sf::Event::KeyReleased) {
-                key_released_event.Add(func);
-            } else if constexpr (type == sf::Event::MouseWheelMoved) {
-                mouse_wheel_moved_event.Add(func);
-            } else if constexpr (type == sf::Event::MouseWheelScrolled) {
-                mouse_wheel_scrolled_event.Add(func);
-            } else if constexpr (type == sf::Event::MouseButtonPressed) {
-                mouse_button_pressed_event.Add(func);
-            } else if constexpr (type == sf::Event::MouseButtonReleased) {
-                mouse_button_released_event.Add(func);
-            } else if constexpr (type == sf::Event::MouseMoved) {
-                mouse_move_event.Add(func);
-            } else if constexpr (type == sf::Event::MouseEntered) {
-                mouse_entered_event.Add(func);
-            } else if constexpr (type == sf::Event::MouseLeft) {
-                mouse_left_event.Add(func);
-            } else if constexpr (type == sf::Event::JoystickButtonPressed) {
-                joy_btn_pressed_event.Add(func);
-            } else if constexpr (type == sf::Event::JoystickButtonReleased) {
-                joy_btn_released_event.Add(func);
-            } else if constexpr (type == sf::Event::JoystickMoved) {
-                joy_moved_event.Add(func);
-            } else if constexpr (type == sf::Event::JoystickConnected) {
-                joy_connected_event.Add(func);
-            } else if constexpr (type == sf::Event::JoystickDisconnected) {
-                joy_disconnected_event.Add(func);
-            } else if constexpr (type == sf::Event::TouchBegan) {
-                touch_began_event.Add(func);
-            } else if constexpr (type == sf::Event::TouchMoved) {
-                touch_moved_event.Add(func);
-            } else if constexpr (type == sf::Event::TouchEnded) {
-                touch_ended_event.Add(func);
-            } else if constexpr (type == sf::Event::SensorChanged) {
-                sensor_event.Add(func);
-            } else if constexpr (type == sf::Event::Count) {
-
-            }
-        }
     private:
-        template<class _Fty>
+        static void framebuffer_resize_callback(GLFWwindow*, int fbW, int fbH);
-        class EventHolder {
-        public:
-            template<typename... Args>
-            void Trigger(Args... args) {
-                for(const std::function<_Fty>& func : callbacks) {
-                    func(std::forward<Args>(args)...);
-                }
-            }
 
-            void Add(const std::function<_Fty>& func) {
+        std::shared_ptr<GLFWwindow> window;
-                callbacks.emplace_back(func);
-            }
-        private:
-            std::vector<std::function<_Fty>> callbacks;
-        };
-
-        // Window event callbacks:
-        EventHolder<void()> close_event;
-        EventHolder<void(sf::Event::SizeEvent)> resized_event;
-        EventHolder<void()> lost_focus_event;
-        EventHolder<void()> gained_focus_event;
-        EventHolder<void(sf::Event::TextEvent)> text_entered_event;
-        EventHolder<void(sf::Event::KeyEvent)> key_pressed_event;
-        EventHolder<void(sf::Event::KeyEvent)> key_released_event;
-        EventHolder<void(sf::Event::MouseWheelEvent)> mouse_wheel_moved_event;
-        EventHolder<void(sf::Event::MouseWheelScrollEvent)> mouse_wheel_scrolled_event;
-        EventHolder<void(sf::Event::MouseButtonEvent)> mouse_button_pressed_event;
-        EventHolder<void(sf::Event::MouseButtonEvent)> mouse_button_released_event;
-        EventHolder<void(sf::Event::MouseMoveEvent)> mouse_move_event;
-        EventHolder<void()> mouse_entered_event;
-        EventHolder<void()> mouse_left_event;
-        EventHolder<void(sf::Event::JoystickButtonEvent)> joy_btn_pressed_event;
-        EventHolder<void(sf::Event::JoystickButtonEvent)> joy_btn_released_event;
-        EventHolder<void(sf::Event::JoystickMoveEvent)> joy_moved_event;
-        EventHolder<void(sf::Event::JoystickConnectEvent)> joy_connected_event;
-        EventHolder<void(sf::Event::JoystickConnectEvent)> joy_disconnected_event;
-        EventHolder<void(sf::Event::TouchEvent)> touch_began_event;
-        EventHolder<void(sf::Event::TouchEvent)> touch_moved_event;
-        EventHolder<void(sf::Event::TouchEvent)> touch_ended_event;
-        EventHolder<void(sf::Event::SensorEvent)> sensor_event;
-
-        sf::RenderWindow* window;
-
-        sf::Clock delta_time_clock; // Delta time clock
-        float delta_time; // Delta time
-
-        std::vector<Event*> events;
     };
 }
 

src/game.cpp

@@ -1,160 +1,94 @@
 //
 // Created by SeanOMik on 7/2/2020.
 // Github: https://github.com/SeanOMik
-// Email: seanomik@gmail.com
 //
 
 #include "game.h"
-#include "entity.h"
-#include "event.h"
 
-simpleengine::Game::Game(int w, int h, const std::string& window_name) {
+#include <iostream>
-    // Create a render window
-    window = new sf::RenderWindow(sf::VideoMode(w, h), window_name);
-}
 
-simpleengine::Game::Game(const sf::Vector2u& window_size, const std::string& window_name) : simpleengine::Game(window_size.x, window_size.y, window_name) {
+#include <gl/glew.h>
+#include <GLFW/glfw3.h>
 
+#include <gl/gl.h>
+
+simpleengine::Game::Game(int w, int h, const std::string& window_name, const bool& resizeable) {
+    // Create a window
+    glfwInit();
+
+    glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 4);
+    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 4);
+    glfwWindowHint(GLFW_RESIZABLE, resizeable);
+
+    glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
+
+    window = std::shared_ptr<GLFWwindow>(glfwCreateWindow(w, h, window_name.c_str(), NULL, NULL));
+
+    // If we're not resizeable, we need to set the viewport size.
+    if (!resizeable) {
+        int fbWidth;
+        int fbHeight;
+        glfwGetFramebufferSize(window.get(), &fbWidth, &fbHeight);
+        glViewport(0, 0, fbWidth, fbHeight);
+    } else {
+        glfwSetFramebufferSizeCallback(window.get(), simpleengine::Game::framebuffer_resize_callback);
+    }
+
+    glfwMakeContextCurrent(window.get());
+
+    glewExperimental = GL_TRUE;
+
+    if (glewInit() != GLEW_OK) {
+        std::cout << "Failed to initialize glew!" << std::endl;
+        glfwTerminate();
+    }
 }
 
 simpleengine::Game::~Game() {
-    delete window;
     
-    std::vector<Event*>::iterator it = events.begin();
-    while (it != events.end()) {
-        delete (*it);
-        it = events.erase(it);
-    }
 }
 
-void simpleengine::Game::UpdateSFMLEvents() {
+void simpleengine::Game::update() {
-    sf::Event event;
+    
-    while (window->pollEvent(event)) {
-        switch (event.type) {
-            case sf::Event::Closed:
-                close_event.Trigger();
-                window->close();
-                break;
-            case sf::Event::Resized:
-                resized_event.Trigger(event.size);
-                break;
-            case sf::Event::LostFocus:
-                lost_focus_event.Trigger();
-                break;
-            case sf::Event::GainedFocus:
-                gained_focus_event.Trigger();
-                break;
-            case sf::Event::TextEntered:
-                text_entered_event.Trigger(event.text);
-                break;
-            case sf::Event::KeyPressed:
-                key_pressed_event.Trigger(event.key);
-                break;
-            case sf::Event::KeyReleased:
-                key_released_event.Trigger(event.key);
-                break;
-            case sf::Event::MouseWheelMoved:
-                mouse_wheel_moved_event.Trigger(event.mouseWheel);
-                break;
-            case sf::Event::MouseWheelScrolled:
-                mouse_wheel_scrolled_event.Trigger(event.mouseWheelScroll);
-                break;
-            case sf::Event::MouseButtonPressed:
-                mouse_button_pressed_event.Trigger(event.mouseButton);
-                break;
-            case sf::Event::MouseButtonReleased:
-                mouse_button_released_event.Trigger(event.mouseButton);
-                break;
-            case sf::Event::MouseMoved:
-                mouse_move_event.Trigger(event.mouseMove);
-                break;
-            case sf::Event::MouseEntered:
-                mouse_entered_event.Trigger();
-                break;
-            case sf::Event::MouseLeft:
-                mouse_left_event.Trigger();
-                break;
-            case sf::Event::JoystickButtonPressed:
-                joy_btn_pressed_event.Trigger(event.joystickButton);
-                break;
-            case sf::Event::JoystickButtonReleased:
-                joy_btn_released_event.Trigger(event.joystickButton);
-                break;
-            case sf::Event::JoystickMoved:
-                joy_moved_event.Trigger(event.joystickMove);
-                break;
-            case sf::Event::JoystickConnected:
-                joy_connected_event.Trigger(event.joystickConnect);
-                break;
-            case sf::Event::JoystickDisconnected:
-                joy_disconnected_event.Trigger(event.joystickConnect);
-                break;
-            case sf::Event::TouchBegan:
-                touch_began_event.Trigger(event.touch);
-                break;
-            case sf::Event::TouchMoved:
-                touch_moved_event.Trigger(event.touch);
-                break;
-            case sf::Event::TouchEnded:
-                touch_ended_event.Trigger(event.touch);
-                break;
-            case sf::Event::SensorChanged:
-                sensor_event.Trigger(event.sensor);
-                break;
-            case sf::Event::Count:
-                break;
-        }
-    }
 }
 
-void simpleengine::Game::Update() {
+void simpleengine::Game::render_window() {
-    delta_time = delta_time_clock.restart().asSeconds(); // Update delta time
+    glClearColor(0.f, 0.f, 0.f, 1.f);
-    UpdateSFMLEvents();
+    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
-
+    render_items();
-    for (std::vector<Event*>::iterator it = events.begin(); it != events.end(); ) {
-        (*it)->Update(delta_time);
-
-        if ((*it)->IsDestroying()) {
-            delete (*it);
-            it = events.erase(it);
-        } else {
-            ++it;
-        }
-    }
 }
 
-void simpleengine::Game::RenderWindow() {
+void simpleengine::Game::render_items() {
-    window->clear();
+    
-    RenderItems();
-    window->display();
 }
 
-void simpleengine::Game::RenderItems() {
+int simpleengine::Game::run() {
-    for (std::vector<Event*>::iterator it = events.begin(); it != events.end(); it++) {
+    while (!glfwWindowShouldClose(window.get())) {
-        (*it)->Render(window);
+        // Update input
-    }
+        glfwPollEvents();
-}
 
-int simpleengine::Game::Run() {
+        update();
-    sf::CircleShape shape(100);
-    shape.setFillColor(sf::Color::Green);
 
-    while (window->isOpen()) {
+        render_window();
-        Update();
+
-        RenderWindow();
+        // End draw
+        glfwSwapBuffers(window.get());
+        glFlush();
     }
 
     return 0;
 }
 
-void simpleengine::Game::AddEvent(simpleengine::Event *event) {
+std::shared_ptr<GLFWwindow> simpleengine::Game::get_window() {
-    events.emplace_back(event);
-}
-
-sf::RenderWindow* simpleengine::Game::GetWindow() {
     return window;
 }
 
-void simpleengine::Game::ExitGame() {
+void simpleengine::Game::exit() {
-    window->close();
+    glfwSetWindowShouldClose(window.get(), true);
+    glfwTerminate();
+}
+
+void simpleengine::Game::framebuffer_resize_callback(GLFWwindow*, int fbW, int fbH) {
+    glViewport(0, 0, fbW, fbH);
 }