IMGUI - создаем легкий и гибкий интерфейс для ваших приложений

ImGui (short for "Immediate Mode Graphical User Interface") is a powerful and flexible user interface library for creating game development tools and applications. It was created by Omar Cornut and is based on the idea of immediate mode rendering, which means that every frame, we need to rebuild the user interface from scratch.

ImGui provides a simple and intuitive interface for creating complex user interfaces. It's written in C/C++ and supports many platforms, including Windows, macOS, Linux, and mobile. The library is based on a simple set of graphical primitives, such as buttons, text boxes, sliders, and menus, which can be combined to create more complex widgets.

Here is an example of how to use ImGui to create a simple user interface:

c++
#include 
#include 
int main(int argc, char** argv) {
   // Initialize SDL
   SDL_Init(SDL_INIT_VIDEO);
   // Create a window and OpenGL context
   SDL_Window* window = SDL_CreateWindow("ImGui Example", SDL_WINDOWPOS_UNDEFINED,
SDL_WINDOWPOS_UNDEFINED, 800, 600, SDL_WINDOW_OPENGL);
   SDL_GLContext glcontext = SDL_GL_CreateContext(window);
   // Initialize ImGui
   ImGui::CreateContext();
   ImGuiSDL::Initialize(glcontext, 800, 600);
   // Main loop
   while (true) {
       // Process events
       SDL_Event event;
       while (SDL_PollEvent(&event)) {
           ImGuiSDL::ProcessEvent(&event);
           if (event.type == SDL_QUIT) {
               break;
           }
       }
       // Start a new ImGui frame
       ImGuiSDL::NewFrame(window);
       // Draw a simple button
       if (ImGui::Button("Hello, World!")) {
           std::cout << "Button pressed!" << std::endl;
       }
       // Render the ImGui frame
       ImGui::Render();
       ImGuiSDL::Render(ImGui::GetDrawData());
       // Swap buffers
       SDL_GL_SwapWindow(window);
   }
   // Cleanup
   ImGuiSDL::Deinitialize();
   ImGui::DestroyContext();
   SDL_GL_DeleteContext(glcontext);
   SDL_DestroyWindow(window);
   SDL_Quit();
   return 0;
}

In this example, we first initialize SDL and create a window with an OpenGL context. We then create an instance of ImGui and initialize it with the SDL context. In the main loop, we process SDL events and call ImGuiSDL::NewFrame() to start a new ImGui frame. We then draw a simple button using the ImGui::Button() function. Finally, we render the ImGui frame using ImGui::Render() and ImGuiSDL::Render(), and swap the buffers.

Overall, ImGui is a powerful and flexible user interface library that makes it easy to create complex interfaces for game development tools and applications. It's highly customizable and can be extended with plugins and widgets, making it a powerful tool for any game developer.