ImGui入门教程03.01：Hello World

系列索引：ImGui入门教程教程

目的

测试ImGui库是否可以正常调用。

为了配合OpenGL学习教程，本系列界面库使用glfw3。

代码

#include <stdio.h>
#include <GLFW/glfw3.h>
#include "imgui.h"

static void glfw_error_callback(int error, const char* description)
{
    fprintf(stderr, "Glfw Error %d: %s\n", error, description);
}

int main(int, char**)
{
    // Setup window
    glfwSetErrorCallback(glfw_error_callback);
    if (!glfwInit())
        return 1;

    GLFWwindow* window = glfwCreateWindow(1280, 720, "GLFW Window", NULL, NULL);
    if (window == NULL)
        return 1;

    glfwMakeContextCurrent(window);
    glfwSwapInterval(1); // Enable vsync

    // Main loop
    while (!glfwWindowShouldClose(window))
    {
        // Poll and handle events (inputs, window resize, etc.)
        glfwPollEvents();

        int display_w, display_h;
        glfwGetFramebufferSize(window, &display_w, &display_h);
        glViewport(0, 0, display_w, display_h);
        glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
        glClear(GL_COLOR_BUFFER_BIT);
        
        //display func

        glfwMakeContextCurrent(window);
        glfwSwapBuffers(window);
    }

    glfwDestroyWindow(window);
    glfwTerminate();

    return 0;
}

编译命令

all:
	g++ main.cpp -o helloworld -lglfw -lGL -limgui -I/usr/include/imgui

运行输出为glfw窗口，效果参考GLFW入门教程02.02：空白界面，那么安装的库/头文件可以正常链接。