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Question

尝试在 openGL 中创建 USB 记忆棒时，我总是遇到错误

我无法编译代码。代码的唯一错误对应于第 87-100 行，其余部分看起来还不错。

#include <iostream>         // cout, cerr
#include <cstdlib>          // EXIT_FAILURE
#include <GL/glew.h>        // GLEW library
#include <GLFW/glfw3.h>     // GLFW library


const int WINDOW_WIDTH = 800;
const int WINDOW_HEIGHT = 600;

const char* vertexShaderSource =
"#version 330 core\n"
"layout (location = 0) in vec3 aPos;\n"
"void main()\n"
"{\n"
"   gl_Position = vec4(aPos.x, aPos.y, aPos.z, 1.0);\n"
"}\0";

const char* fragmentShaderSource =
"#version 330 core\n"
"out vec4 FragColor;\n"
"void main()\n"
"{\n"
"   FragColor = vec4(1.0f, 1.0f, 1.0f, 1.0f);\n"
"}\n\0";

unsigned int CompileShader(unsigned int type, const char* source)
{
    unsigned int shader = glCreateShader(type);
    glShaderSource(shader, 1, &source, NULL);
    glCompileShader(shader);

    int success;
    char infoLog[512];
    glGetShaderiv(shader, GL_COMPILE_STATUS, &success);
    if (!success)
    {
        glGetShaderInfoLog(shader, 512, NULL, infoLog);
        std::cout << "ERROR::SHADER::COMPILATION_FAILED\n" << infoLog << std::endl;
    }

    return shader;
}

unsigned int CreateShader()
{
    unsigned int vertexShader = CompileShader(GL_VERTEX_SHADER, vertexShaderSource);
    unsigned int fragmentShader = CompileShader(GL_FRAGMENT_SHADER, fragmentShaderSource);

    unsigned int shaderProgram = glCreateProgram();
    glAttachShader(shaderProgram, vertexShader);
    glAttachShader(shaderProgram, fragmentShader);
    glLinkProgram(shaderProgram);

    int success;
    char infoLog[512];
    glGetProgramiv(shaderProgram, GL_LINK_STATUS, &success);
    if (!success)
    {
        glGetProgramInfoLog(shaderProgram, 512, NULL, infoLog);
        std::cout << "ERROR::SHADER::LINKING_FAILED\n" << infoLog << std::endl;
    }

    glDeleteShader(vertexShader);
    glDeleteShader(fragmentShader);

    return shaderProgram;
}


float vertices[] = {
    // first cube
    -0.5f, -0.5f, -0.5f,  // bottom-left-back
    0.5f, -0.5f, -0.5f,   // bottom-right-back
    0.5f,  0.5f, -0.5f,   // top-right-back
    0.5f,  0.5f, -0.5f,   // top-right-back
    -0.5f,  0.5f, -0.5f,  // top-left-back
    -0.5f, -0.5f, -0.5f,  // bottom-left-back
    -0.5f, -0.5f,  0.5f,  // bottom-right-back
    0.5f, -0.5f,  0.5f,   // bottom-right-front
    0.5f,  0.5f,  0.5f,   // top-right-front
    -0.5f,  0.5f,  0.5f,  // top-left-front
    -0.5f,  0.5f,  0.5f,  // top-left-front
    -0.5f, -0.5f,  0.5f,  // bottom-left-front
    0.5f, -0.5f,  0.5f    // bottom-right-front
};

unsigned int VBO, VAO;
glGenVertexArrays(1, &VAO);
glGenBuffers(1, &VBO);

glBindVertexArray(VAO);

glBindBuffer(GL_ARRAY_BUFFER, VBO);
glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);

glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 3 * sizeof(float), (void*)0);
glEnableVertexAttribArray(0);

glBindBuffer(GL_ARRAY_BUFFER, 0);
glBindVertexArray(0);

int main()
{
    glfwInit();
    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
    glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);

    GLFWwindow* window = glfwCreateWindow(WINDOW_WIDTH, WINDOW_HEIGHT, "USB Drive", NULL, NULL);
    if (window == NULL)
    {
        std::cout << "Failed to create GLFW window" << std::endl;
        glfwTerminate();
        return -1;
    }
    glfwMakeContextCurrent(window);

    glewExperimental = GL_TRUE;
    if (glewInit() != GLEW_OK)
    {
        std::cout << "Failed to initialize GLEW" << std::endl;
        return -1;
    }

    glViewport(0, 0, WINDOW_WIDTH, WINDOW_HEIGHT);

    unsigned int shaderProgram = CreateShader();

    while (!glfwWindowShouldClose(window))
    {
        glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
        glClear(GL_COLOR_BUFFER_BIT);

        glUseProgram(shaderProgram);
        glBindVertexArray(VAO);
        glDrawArrays(GL_TRIANGLES, 0, 36);

        glfwSwapBuffers(window);
        glfwPollEvents();
    }

    glDeleteVertexArrays(1, &VAO);
    glDeleteBuffers(1, &VBO);
    glDeleteProgram(shaderProgram);

    glfwTerminate();
    return 0;
}

我一直在谷歌搜索以查看问题所在，但我对 opengl 很陌生，真的不知道该怎么做

Severity    Code    Description Project File    Line    Suppression State
Error   C2373   '__glewBindBuffer': redefinition; different type modifiers  OpenGLSample    C:\Users\Ismael\Documents\CS330\OpenGLSample\OpenGLSample\Source.cpp    93  
Error   C2373   '__glewBindBuffer': redefinition; different type modifiers  OpenGLSample    C:\Users\Ismael\Documents\CS330\OpenGLSample\OpenGLSample\Source.cpp    99  
Error   C2373   '__glewBindVertexArray': redefinition; different type modifiers OpenGLSample    C:\Users\Ismael\Documents\CS330\OpenGLSample\OpenGLSample\Source.cpp    91  
Error   C2373   '__glewBindVertexArray': redefinition; different type modifiers OpenGLSample    C:\Users\Ismael\Documents\CS330\OpenGLSample\OpenGLSample\Source.cpp    100 
Error   C2065   '__glewBindVertexArray': undeclared identifier  OpenGLSample    C:\Users\Ismael\Documents\CS330\OpenGLSample\OpenGLSample\Source.cpp    135 
Error   C2373   '__glewBufferData': redefinition; different type modifiers  OpenGLSample    C:\Users\Ismael\Documents\CS330\OpenGLSample\OpenGLSample\Source.cpp    94  
Error   C2373   '__glewEnableVertexAttribArray': redefinition; different type modifiers OpenGLSample    C:\Users\Ismael\Documents\CS330\OpenGLSample\OpenGLSample\Source.cpp    97  
Error   C2373   '__glewGenBuffers': redefinition; different type modifiers  OpenGLSample    C:\Users\Ismael\Documents\CS330\OpenGLSample\OpenGLSample\Source.cpp    89  
Error   C2373   '__glewGenVertexArrays': redefinition; different type modifiers OpenGLSample    C:\Users\Ismael\Documents\CS330\OpenGLSample\OpenGLSample\Source.cpp    88  
Error   C2373   '__glewVertexAttribPointer': redefinition; different type modifiers OpenGLSample    C:\Users\Ismael\Documents\CS330\OpenGLSample\OpenGLSample\Source.cpp    96  
Error   C4430   missing type specifier - int assumed. Note: C++ does not support default-int    OpenGLSample    C:\Users\Ismael\Documents\CS330\OpenGLSample\OpenGLSample\Source.cpp    88  
Error   C4430   missing type specifier - int assumed. Note: C++ does not support default-int    OpenGLSample    C:\Users\Ismael\Documents\CS330\OpenGLSample\OpenGLSample\Source.cpp    89  
Error   C4430   missing type specifier - int assumed. Note: C++ does not support default-int    OpenGLSample    C:\Users\Ismael\Documents\CS330\OpenGLSample\OpenGLSample\Source.cpp    91  
Error   C4430   missing type specifier - int assumed. Note: C++ does not support default-int    OpenGLSample    C:\Users\Ismael\Documents\CS330\OpenGLSample\OpenGLSample\Source.cpp    93  
Error   C4430   missing type specifier - int assumed. Note: C++ does not support default-int    OpenGLSample    C:\Users\Ismael\Documents\CS330\OpenGLSample\OpenGLSample\Source.cpp    94  
Error   C4430   missing type specifier - int assumed. Note: C++ does not support default-int    OpenGLSample    C:\Users\Ismael\Documents\CS330\OpenGLSample\OpenGLSample\Source.cpp    96  
Error   C4430   missing type specifier - int assumed. Note: C++ does not support default-int    OpenGLSample    C:\Users\Ismael\Documents\CS330\OpenGLSample\OpenGLSample\Source.cpp    97  
Error   C4430   missing type specifier - int assumed. Note: C++ does not support default-int    OpenGLSample    C:\Users\Ismael\Documents\CS330\OpenGLSample\OpenGLSample\Source.cpp    99  
Error   C4430   missing type specifier - int assumed. Note: C++ does not support default-int    OpenGLSample    C:\Users\Ismael\Documents\CS330\OpenGLSample\OpenGLSample\Source.cpp    100 
Error (active)  E0077   this declaration has no storage class or type specifier OpenGLSample    C:\Users\Ismael\Documents\CS330\OpenGLSample\OpenGLSample\Source.cpp    88  
Error (active)  E0077   this declaration has no storage class or type specifier OpenGLSample    C:\Users\Ismael\Documents\CS330\OpenGLSample\OpenGLSample\Source.cpp    89  
Error (active)  E0077   this declaration has no storage class or type specifier OpenGLSample    C:\Users\Ismael\Documents\CS330\OpenGLSample\OpenGLSample\Source.cpp    91  
Error (active)  E0077   this declaration has no storage class or type specifier OpenGLSample    C:\Users\Ismael\Documents\CS330\OpenGLSample\OpenGLSample\Source.cpp    93  
Error (active)  E0077   this declaration has no storage class or type specifier OpenGLSample    C:\Users\Ismael\Documents\CS330\OpenGLSample\OpenGLSample\Source.cpp    94  
Error (active)  E0077   this declaration has no storage class or type specifier OpenGLSample    C:\Users\Ismael\Documents\CS330\OpenGLSample\OpenGLSample\Source.cpp    96  
Error (active)  E0077   this declaration has no storage class or type specifier OpenGLSample    C:\Users\Ismael\Documents\CS330\OpenGLSample\OpenGLSample\Source.cpp    97  
Error (active)  E0077   this declaration has no storage class or type specifier OpenGLSample    C:\Users\Ismael\Documents\CS330\OpenGLSample\OpenGLSample\Source.cpp    99  
Error (active)  E0077   this declaration has no storage class or type specifier OpenGLSample    C:\Users\Ismael\Documents\CS330\OpenGLSample\OpenGLSample\Source.cpp    100