win11: cmake+glfw+imgui

1. 下载源码：imgui github地址

2. 将需要的文件拖拽入项目外部库的imgui文件夹
   
   backends文件夹里选择与环境适配的文件，我这里用了glfw和opengl3
   
   目录结构：
   

3. CMakeLists.txt

   cmake_minimum_required(VERSION 3.24)
   project(proforlearn)
   set(CMAKE_CXX_STANDARD 17)
   
   
   file(GLOB SRC
           ${PROJECT_SOURCE_DIR}/external/imgui/*.h
           ${PROJECT_SOURCE_DIR}/external/imgui/*.cpp
   )
   add_executable(proforlearn ${SRC} main.cpp)
   
   find_package(OpenGL REQUIRED)
   include_directories(${PROJECT_SOURCE_DIR}/external/glfw/include)
   link_directories(${PROJECT_SOURCE_DIR}/external/glfw/lib-mingw-w64)
   target_link_libraries(proforlearn opengl32 glfw3.dll)
   
   include_directories(${PROJECT_SOURCE_DIR}/external/imgui)
   

4. 测试代码：

   #include "imgui.h"
   #include "imgui_impl_glfw.h"
   #include "imgui_impl_opengl3.h"
   
   #include <GLFW/glfw3.h>
   
   int main(void)
   {
       GLFWwindow* window;
   
       /* Initialize the library */
       if (!glfwInit())
           return -1;
   
       /* Create a windowed mode window and its OpenGL context */
       window = glfwCreateWindow(640, 480, "Hello World", NULL, NULL);
       if (!window)
       {
           glfwTerminate();
           return -1;
       }
   
       /* Make the window's context current */
       glfwMakeContextCurrent(window);
   
       IMGUI_CHECKVERSION();
       ImGui::CreateContext();
       ImGuiIO& io = ImGui::GetIO(); (void)io;
       ImGui_ImplGlfw_InitForOpenGL(window, true);
       ImGui_ImplOpenGL3_Init("#version 330");
   
       /* Loop until the user closes the window */
       while (!glfwWindowShouldClose(window))
       {
           /* Render here */
           glClear(GL_COLOR_BUFFER_BIT);
   
           ImGui_ImplOpenGL3_NewFrame();
           ImGui_ImplGlfw_NewFrame();
           ImGui::NewFrame();
   
           ImGui::Begin("My name is window, ImGUI window");
           ImGui::Text("Hello there new born!");
           ImGui::End();
           ImGui::Render();
           ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
   
   
           /* Swap front and back buffers */
           glfwSwapBuffers(window);
   
           /* Poll for and process events */
           glfwPollEvents();
       }
   
       ImGui_ImplOpenGL3_Shutdown();
       ImGui_ImplGlfw_Shutdown();
       ImGui::DestroyContext();
   
       glfwTerminate();
       return 0;
   }
   

5. 运行结果：glfw黑框中成功出现imgui文本界面！