【10】使用Test类测试&ImGUI

看看效果

点击测试按钮

另一个是测试颜色的。

看看主要代码：

#include 
#include  

#include  
#include 
#include 
#include 

#include "Renderer.h"

#include "VertexBuffer.h"
#include "VertexBufferLayout.h"
#include "IndexBuffer.h"
#include "VertexArray.h"
#include "Shader.h"
#include "Texture.h"
 
#include "glm/glm.hpp"
#include "glm/gtc/matrix_transform.hpp"

#include "imgui/imgui.h"
#include "imgui/imgui_impl_glfw.h"
#include 

#include "test/TestClearColor.h"
#include "test/TestTexture2D.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);

    glfwSwapInterval(5); // 屏幕刷新率？

    if (glewInit() != GLEW_OK)/*这里就不会报错了*/
        std::cout << "ERROR!-2" << std::endl;

    std::cout << glGetString(GL_VERSION) << std::endl;
     
    /*什么作用来着？*/
    GLCall(GL_BLEND);
    GLCall(glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA));
    
    Renderer renderer;
     
    ImGui::CreateContext();

    ImGuiIO& io = ImGui::GetIO(); (void)io;
    io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard;     // Enable Keyboard Controls
    io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad;      // Enable Gamepad Controls
    const char* glsl_version = "#version 130";

    ImGui_ImplGlfw_InitForOpenGL(window, true); 
    ImGui_ImplOpenGL3_Init(glsl_version);
    ImGui::StyleColorsDark();

    test::Test* currentTest = nullptr;
    test::TestMenu* testMenu = new test::TestMenu(currentTest);
    currentTest = testMenu;

    testMenu->RegisterTest<test::TestClearColor>("Clear Color");
    testMenu->RegisterTest<test::TestTexture2D>("TexTexture 2D");
   
    while (!glfwWindowShouldClose(window))
    { 
        GLCall(glClearColor(0.0f, 0.0f, 0.0f, 1.0f));
        renderer.Clear();
         

        ImGui_ImplOpenGL3_NewFrame();
        ImGui_ImplGlfw_NewFrame();  
        ImGui::NewFrame();
        if (currentTest)
        {
            currentTest->OnUpdate(0.0f);
            currentTest->OnRender();
            ImGui::Begin("Test");
            /*如果currenTest!=testMenu那么就会初始化burron,如果是，不会判断&&后面*/
            if (currentTest != testMenu && ImGui::Button("-<"))
            {
                delete currentTest;
                currentTest = testMenu;
            }
            currentTest->OnImGuiRender();
            ImGui::End();
        }
        
        ImGui::Render(); 
        ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());

        /* Swap front and back buffers */
        glfwSwapBuffers(window);

        /* Poll for and process events */
        glfwPollEvents();
    } 
    delete currentTest;
    if (currentTest != testMenu)
        delete testMenu;

    ImGui_ImplGlfw_Shutdown();
    ImGui::DestroyContext();
    glfwTerminate();
    return 0;
}
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主要是将前面的纹理代码抽象为Test类，源码见：github-TextureTest&ImGUI_openGL