opengl - 无法使用 OpenGL 中的某些函数 (glGenBuffers)

Question

我在其他地方看到过与我类似的问题，但没有人回答或解决我的问题。

在创建Context之后、调用glfwMakeContextCurrent()之前，我已经正确启动了GLEW

启动后，我尝试使用 glGenBuffers() 但它不起作用。抛出错误。

我的 OpenGL 版本是 3.2，因此根据我的阅读，我可以在我的程序中使用此功能。如果我不能的话，请告诉我。我会尝试找出一种不同的方法来做到这一点。

我正在使用Windows 7和VS2012，并且似乎一切都正确链接。希望我提供了我需要的所有信息。

#include <stdlib.h>

#include <stdio.h>

#include <GL/glew.h>

#include <GLFW/glfw3.h>

#include <thread>

int main(){

//Initialize GLFW
if(!glfwInit()){
    printf("GLFW was not initialized successfully!\n");
    std::this_thread::sleep_for(std::chrono::seconds(5));
    exit(EXIT_FAILURE);
}
else{
    printf("GLFW was initialized successfully!\n");
}

glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 2);
glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);

GLFWwindow* window = glfwCreateWindow(800, 600, "PONG!", nullptr, nullptr); // Windowed

glewExperimental = GL_TRUE;
if(!glewInit()){
    printf("GLEW was not initialized successfully!\n");
    std::this_thread::sleep_for(std::chrono::seconds(5));
    exit(EXIT_FAILURE);
}
else{
    printf("GLEW was initialized successfully!\n");
}

glfwMakeContextCurrent(window);

GLuint vertexbuffer;
glGenBuffers(1, &vertexbuffer);

printf("%u\n", vertexbuffer);

fprintf(
    stdout,
    "INFO: The OpenGL version is: %s\n",
    glGetString(GL_VERSION)
);

fprintf(
    stdout,
    "INFO: The GLEW version is: %s\n",
    glewGetString(GLEW_VERSION)
);

while(!glfwWindowShouldClose(window)){
    glfwSwapBuffers(window);
    glfwPollEvents();

    if (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS){
        glfwDestroyWindow(window);
        window = glfwCreateWindow(800, 600, "PONG!", nullptr, nullptr);
    }
    else if (glfwGetKey(window, GLFW_KEY_F) == GLFW_PRESS){
        glfwDestroyWindow(window);
        window = glfwCreateWindow(800, 600, "PONG!", glfwGetPrimaryMonitor(), nullptr);
    }
}
}

Answer 1

I have GLEW initiated properly, right after the Context creation but before I call glfwMakeContextCurrent()

好吧，这就是你的问题 right there :

Successful creation does not change which context is current. Before you can use the newly created context, you need to make it current using glfwMakeContextCurrent.

调用glewInit()之后glfwMakeContextCurrent()。