OpenGL GLFW 窗口一打开就关闭

Posted 2023-04-15

【中文标题】OpenGL GLFW 窗口一打开就关闭

【英文标题】：OpenGL GLFW window closes as soon as it opens

【发布时间】：2014-10-19 09:24:19

【问题描述】：

我无法在黑色窗口中看到我的三角形。窗口虽然只是在打开时关闭，并且不允许我看到里面发生了什么。我在网上某处看到我与次要版本有关，我不知道如何检查我的 VGA 卡。

这是我的完整代码：

#define GLEW_STATIC
#include <stdio.h>
#include <GL\glew.h>
#include <GL\GLU.h>
#include <GL\glut.h>
#include <glm.hpp>
#include <GL\gl.h>
#include <GLFW\glfw3.h>

using namespace glm;
using namespace std;




int main()

    glfwWindowHint(GLFW_SAMPLES, 4); // anti aliasing
    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3); // openGL major version to be 3
    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 0); // minor set to 3, which makes the version 3.3
    glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // for MAC OS only
    glfwWindowHint(GLFW_OPENGL_COMPAT_PROFILE, GLFW_OPENGL_CORE_PROFILE); //avoid using old openGL

    GLFWwindow* window;

    window = glfwCreateWindow(1024, 768, "First Window in OpenGL", NULL, NULL);

    if (window == NULL)
    
        fprintf(stderr, "Failed to open GLFW window. If you have an Intel GPU, they are not 3.3 compatible. Try the 2.1 version of the tutorials.\n");
        glfwTerminate();
        return -1;
    

    glfwMakeContextCurrent(window);

    GLuint VertexArrayID;
    glGenVertexArrays(1, &VertexArrayID);
    glBindVertexArray(VertexArrayID);

    static const GLfloat g_vertex_buffer_data[] = 
        -1.0f, -1.0f, 0.0f,
        1.0f, -1.0f, 0.0,
        0.0f, 1.0f, 0.0f
    ;

    // identifying our vertex buffer
    GLuint vertexbuffer;

    glGenBuffers(1, &vertexbuffer);

    // The following commands will talk about our 'vertexbuffer' buffer
    glBindBuffer(GL_ARRAY_BUFFER, vertexbuffer);

    // Give our vertices to OpenGL.
    glBufferData(GL_ARRAY_BUFFER, sizeof(g_vertex_buffer_data), g_vertex_buffer_data, GL_STATIC_DRAW);



    glewExperimental = true; // Needed in core profile 
    if (glewInit() != GLEW_OK)
    
        fprintf(stderr, "Failed to initialize GLEW\n");
        return -1;
    

    glfwSetInputMode(window, GLFW_STICKY_KEYS, GL_TRUE);
    do
        // 1rst attribute buffer : vertices
        glEnableVertexAttribArray(0);

        glBindBuffer(GL_ARRAY_BUFFER, vertexbuffer);

        glVertexAttribPointer(
            0,                  // attribute 0. No particular reason for 0, but must match the layout in the shader.
            3,                  // size
            GL_FLOAT,           // type
            GL_FALSE,           // normalized?
            0,                  // stride
            (void*)0            // array buffer offset
            );

        glDrawArrays(GL_TRIANGLES, 0, 3); // Starting from vertex 0; 3 vertices total -> 1 triangle

        glDisableVertexAttribArray(0);

        glfwSwapBuffers(window);
        glfwPollEvents();
    
    while (glfwGetKey(window, GLFW_KEY_ESCAPE) != GLFW_PRESS &&
    glfwWindowShouldClose(window) == 0);

    return 0;

任何人都可以帮助我保持窗口打开并按代码预期的那样使用 ESC 键关闭它吗？

【参考方案1】：

窗口立即关闭的原因是您有分段错误。 这很可能是由于未能按正确顺序初始化事物。

在运行任何 glfw 函数调用之前初始化 GLFW，如下所示：

// Initialise GLFW
if( !glfwInit() ) 
    fprintf( stderr, "Failed to initialize GLFW\n" );
    return -1;


glfwWindowHint(GLFW_SAMPLES, 4); // anti aliasing
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3); // openGL major version to be 3
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 0); // minor set to 3, which makes the version 3.3
glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // for MAC OS only
glfwWindowHint(GLFW_OPENGL_COMPAT_PROFILE, GLFW_OPENGL_CORE_PROFILE); //avoid using old openGL

GLFWwindow* window;
window = gl

然后，在创建和设置 GL 上下文后将 glew 的初始化移动到右侧：

if (window == NULL) 
  fprintf(stderr, "Failed to open GLFW window. If you have an Intel GPU, they are not 3.3 compatible. Try the 2.1 version of the tutorials.\n");
  glfwTerminate();
  return -1;

glfwMakeContextCurrent(window);

glewExperimental = GL_TRUE; // Needed in core profile 
const GLenum err = glewInit(); 
if (err != GLEW_OK) 
  fprintf(stderr, "Failed to initialize GLEW\n");
  fprintf(stderr, "Error: %s\n", glewGetErrorString(err));
  return -1;


GLuint VertexArrayID;
glGenVertexArrays(1, &VertexArrayID);
glBindVertexArray(VertexArrayID);

// ... rest of code follows

我已经测试过了，你的代码现在应该可以正常工作了，并且在你点击ESC之前窗口不会关闭。

【讨论】：

谢谢，当我这样做时，我的输出中会得到一堆报告，其中包含几个文件。错误是这样的：'openGL.exe' (Win32): Loaded 'C:\Windows\SysWOW64\kernel32.dll'. Cannot find or open the PDB file.

似乎与您的原始问题无关，很可能您应该创建一个新问题来解决它。你检查过这个吗？ ***.com/questions/15937707/…

不，它是相关的。我已经使用您的解决方案解决了它。我在实施您的解决方案时犯了一个错误。非常感谢斯瓦洛格