C++ OpenGL没有渲染，可能是由于一些简单的错误，我无法'；找不到

因此，这段代码应该渲染一个矩形（最终我希望它渲染一个立方体，但如果不能先绘制一个矩形，那么尝试这样做是没有意义的）

我有检查GL错误的代码，虽然有一个，但对此的回答让我觉得它不相关（它是

GL\u INVALID\u ENUM

，在

glewInit（）；

之后立即抛出）

这是我的密码：

主要内容：

#包括
#包括
#包括
#包括
#包括
#包括
#定义GLEW_静态
#包括
#包括
GLuint VertexBuffer、VertexArray、ElementBuffer、着色器程序；
GLfloat顶点[]={
-0.5,0.5,0.5，//前左上角-0
0.5,0.5,0.5，//前右上角-1
0.5，-0.5,0.5，//前下右-2
-0.5，-0.5,0.5，//前下左-3
-0.5,0.5，-0.5，//左上角-4
0.5,0.5，-0.5，//右后上方-5
0.5，-0.5，-0.5，//后右下角-6
-0.5，-0.5，-0.5，//后左下角-7
};
胶合元素[]{
0,1,2,
2,3,0
};
int main（）
{
校验错误（uuu函数uuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu；
/*初始化*/
GLFWwindow*window=InitializeContext（）；
校验错误（uuu函数uuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu；
//使用元素数组创建元素缓冲区对象
ElementBuffer=InitializeElementBuffer（elements，sizeof（elements）/sizeof（GLuint））；
校验错误（uuu函数uuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu；
//加载并编译着色器
ShaderProgram=加载着色器（“vertexshader.cpp”、“fragmentshader.cpp”）；
校验错误（uuu函数uuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu；
//创建顶点属性数组
VertexArray=创建VertexArray（）；
校验错误（uuu函数uuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu；
//使用顶点数组创建顶点缓冲区对象
VertexBuffer=InitializeVertexBuffer（顶点，sizeof（顶点）/sizeof（GLfloat））；
校验错误（uuu函数uuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu；
//为数组指定适当的结构
初始化EvertexArray（着色器程序）；
校验错误（uuu函数uuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu；
而（！glfwWindowShouldClose（窗口））
{
如果（glfwGetKey（窗口，GLFW_键_退出）==GLFW_按）{
glfwSetWindowShouldClose（窗口，GL_TRUE）；
}
gld元素（GL_三角形，6，GL_无符号，0）；
校验错误（uuu函数uuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu；
glfwSwapBuffers（窗口）；
glfwPollEvents（）；
}
校验错误（uuu函数uuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu；
glfwTerminate（）；
}

• （pastebin链接，因为SO似乎不希望我的帖子中有那么多文本）更新以修复用户3256930指出的缺陷
• （出于同样的原因再次使用pastebin）

我很乐意按要求提供更多信息

---

注意：我以前能够画三角形，但我的旧代码没有告诉我为什么失败。

当您将数组作为函数参数传递时，它将其视为指针，并且您不能在函数中使用sizeof来获取数组的完整大小。在这种情况下，还需要将数组的大小作为函数参数传递。调用glBufferData时，size参数期望的是数组的字节大小，而不是数组中的元素数。

我发现了一些潜在问题。首先，在initializeVertexBuffer函数中有一个数组参数，并在函数中执行sizeof。这实际上只会给您一个单一的GLFLASH的大小，因为C++中如何处理数组参数，因此函数可能不加载所有数据。我建议为该函数添加一个size参数。第二个潜在问题是初始化VAO和VBO的顺序。您需要首先执行VAO，因为当您执行GLVERTEXAttributePointer调用时，它会跟踪哪些VBO被绑定。@user3256930使用

sizeof（顶点）

，所以我认为这不是问题所在。我必须看看VBO和VAO的创建顺序是否重要。该教程使用与sizeof相同的函数定义数组。您正在将数组作为函数参数传递。请参阅此帖子，了解为什么这不起作用：。在关于顶点数组的同一教程中，它还说您需要先创建VAO。@user3256930我做了您建议的更改：1。使元素和顶点缓冲区对象接受一个参数

size\u t size

，并让它打印值，确保它们是正确的2。将InitializeVertexArray拆分为CreatVertexArray和InitializeVertexArray（参见文章），但它仍然不会呈现任何内容。我认为在创建顶点数组后，还需要移动索引缓冲区的初始化。只是检查一下是否正常，但你在哪里设置颜色？这是在你的着色器中硬编码的吗？

#include <glm/glm.hpp>
#include <GL/glew.h>
#include <GLFW/glfw3.h>
#include <GL/gl.h>
#include <GL/glext.h>
#include <thread>

#define GLEW_STATIC
#include <GL/glew.h>

#include <engine.hpp>

GLuint VertexBuffer, VertexArray, ElementBuffer, ShaderProgram;

GLfloat vertices[] = {
         -0.5, 0.5, 0.5, // Front Top Left      - 0
         0.5,  0.5, 0.5, // Front Top Right     - 1
         0.5, -0.5, 0.5, // Front Bottom Right  - 2
         -0.5,-0.5, 0.5, // Front Bottom Left   - 3
         -0.5, 0.5,-0.5, // Back Top Left       - 4
         0.5,  0.5,-0.5, // Back Top Right      - 5
         0.5, -0.5,-0.5, // Back Bottom Right   - 6
         -0.5,-0.5,-0.5, // Back Bottom Left    - 7
};

GLuint elements[]{
    0,1,2,
    2,3,0
};

int main()
{
    CheckForGLErrors(__func__, __LINE__);

    /*Initialization*/
    GLFWwindow* window = InitializeContext();
    CheckForGLErrors(__func__, __LINE__);

    //Create our element buffer object using the elements array
    ElementBuffer = InitializeElementBuffer(elements, sizeof(elements)/sizeof(GLuint));
    CheckForGLErrors(__func__, __LINE__);

    //Load and compile the shaders
    ShaderProgram = LoadShaders("vertexshader.cpp", "fragmentshader.cpp");
    CheckForGLErrors(__func__, __LINE__);

    //Create our vertex attribute array
    VertexArray = CreateVertexArray();
    CheckForGLErrors(__func__, __LINE__);

    //Create our vertex  buffer object using the vertices array
    VertexBuffer = InitializeVertexBuffer(vertices, sizeof(vertices)/sizeof(GLfloat));
    CheckForGLErrors(__func__, __LINE__);

    //Assign our array the appropriate structure
    InitializeVertexArray(ShaderProgram);
    CheckForGLErrors(__func__, __LINE__);




    while(!glfwWindowShouldClose(window))
    {
        if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS){
            glfwSetWindowShouldClose(window, GL_TRUE);
        }

        glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, 0);

        CheckForGLErrors(__func__, __LINE__);
        glfwSwapBuffers(window);
        glfwPollEvents();
    }

    CheckForGLErrors(__func__, __LINE__);

    glfwTerminate();
}