OpenGL on Xcode8.2.1 - ウィンドウに頂点が表示されませんでした

Question

私はc++とopenGLを今学び、MacBookXcodeで動作させています。私はこのコードを持っています：

#include <GL/glew.h> 
#include <GLFW/glfw3.h> 
#include <stdio.h> 

int main() 
{ 
    GLFWwindow* window = NULL; 
    const GLubyte* renderer; 
    const GLubyte* version; 

    if (!glfwInit()) { 
     fprintf (stderr, "ERROR: could not start GLFW3\n"); 
     return 1; 
    } 

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

    window = glfwCreateWindow (640, 480, "OpenGL", NULL, NULL); 
    if (!window) { 
     fprintf (stderr, "ERROR: could not open window with GLFW3\n"); 
     glfwTerminate(); 
     return 1; 
    } 
    glfwMakeContextCurrent (window); 

    /* start GLEW extension handler */ 
    glewExperimental = GL_TRUE; 
    glewInit(); 

    glEnable (GL_DEPTH_TEST); 
    glDepthFunc (GL_LESS); 

    GLfloat vertices[] = { 
     0.5f, 0.5f, 0.0f, // Top Right 
     0.5f, -0.5f, 0.0f, // Bottom Right 
     -0.5f, -0.5f, 0.0f, // Bottom Left 
     -0.5f, 0.5f, 0.0f // Top Left 
    }; 
    GLuint indices[] = { // Note that we start from 0! 
     0, 1, 3, // First Triangle 
     1, 2, 3 // Second Triangle 
    }; 
    GLuint VBO, VAO, EBO; 
    glGenVertexArrays(1, &VAO); 
    glGenBuffers(1, &VBO); 
    glGenBuffers(1, &EBO); 

    glBindVertexArray(VAO); 

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

    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, EBO); 
    glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(indices), indices, GL_STATIC_DRAW); 

    glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 3 * sizeof(GLfloat), (GLvoid*)0); 

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

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

     glClearColor(0.2f, 0.3f, 0.3f, 1.0f); 
     glClear(GL_COLOR_BUFFER_BIT); 

     glBindVertexArray(VAO); 
     glDrawArrays(GL_TRIANGLES, 0, 6); 
//  glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, 0); 
     glBindVertexArray(0); 

     glfwSwapBuffers(window); 
    } 

    glDeleteVertexArrays(1, &VAO); 
    glDeleteBuffers(1, &VBO); 
    glDeleteBuffers(1, &EBO); 

    glfwTerminate(); 
    return 0; 
} 

ウィンドウはエラーなしで開くことができましたが、シーンに描かれたクワッドやトライアングルはありませんでした。私は試してみました：の前には試しましたが、まだ何もありません。

glPolygonMode(GL_FRONT_AND_BACK, GL_LINE); 

何が働いていないようですか？私はprintf以下を使用しています：

どうすれば解決できますか？

Update01

私はシェーダとバージョンがあります：

#include <iostream> 
#include <GL/glew.h> 
#include <GLFW/glfw3.h> 
#include <stdio.h> 

const GLchar* vertexShaderSource = "#version 330 core\n" 
"layout (location = 0) in vec3 position;\n" 
"void main()\n" 
"{\n" 
"gl_Position = vec4(position.x, position.y, position.z, 1.0);\n" 
"}\0"; 
const GLchar* fragmentShaderSource = "#version 330 core\n" 
"out vec4 color;\n" 
"void main()\n" 
"{\n" 
"color = vec4(1.0f, 0.5f, 0.2f, 1.0f);\n" 
"}\n\0"; 

int main() 
{ 
    GLFWwindow* window = NULL; 
    const GLubyte* renderer; 
    const GLubyte* version; 

    if (!glfwInit()) { 
     fprintf (stderr, "ERROR: could not start GLFW3\n"); 
     return 1; 
    } 

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

    window = glfwCreateWindow (640, 480, "OpenGL", NULL, NULL); 
    if (!window) { 
     fprintf (stderr, "ERROR: could not open window with GLFW3\n"); 
     glfwTerminate(); 
     return 1; 
    } 
    glfwMakeContextCurrent (window); 

    glewExperimental = GL_TRUE; 
    glewInit(); 

    glEnable (GL_DEPTH_TEST); 
    glDepthFunc (GL_LESS); 

    // Build and compile our shader program 
    // Vertex shader 
    GLuint vertexShader = glCreateShader(GL_VERTEX_SHADER); 
    glShaderSource(vertexShader, 1, &vertexShaderSource, NULL); 
    glCompileShader(vertexShader); 
    // Check for compile time errors 
    GLint success; 
    GLchar infoLog[512]; 
    glGetShaderiv(vertexShader, GL_COMPILE_STATUS, &success); 
    if (!success) 
    { 
     glGetShaderInfoLog(vertexShader, 512, NULL, infoLog); 
     std::cout << "ERROR::SHADER::VERTEX::COMPILATION_FAILED\n" << infoLog << std::endl; 
    } 
    // Fragment shader 
    GLuint fragmentShader = glCreateShader(GL_FRAGMENT_SHADER); 
    glShaderSource(fragmentShader, 1, &fragmentShaderSource, NULL); 
    glCompileShader(fragmentShader); 
    // Check for compile time errors 
    glGetShaderiv(fragmentShader, GL_COMPILE_STATUS, &success); 
    if (!success) 
    { 
     glGetShaderInfoLog(fragmentShader, 512, NULL, infoLog); 
     std::cout << "ERROR::SHADER::FRAGMENT::COMPILATION_FAILED\n" << infoLog << std::endl; 
    } 
    // Link shaders 
    GLuint shaderProgram = glCreateProgram(); 
    glAttachShader(shaderProgram, vertexShader); 
    glAttachShader(shaderProgram, fragmentShader); 
    glLinkProgram(shaderProgram); 
    // Check for linking errors 
    glGetProgramiv(shaderProgram, GL_LINK_STATUS, &success); 
    if (!success) { 
     glGetProgramInfoLog(shaderProgram, 512, NULL, infoLog); 
     std::cout << "ERROR::SHADER::PROGRAM::LINKING_FAILED\n" << infoLog << std::endl; 
    } 
    glDeleteShader(vertexShader); 
    glDeleteShader(fragmentShader); 

    GLfloat vertices[] = { 
     0.5f, 0.5f, 0.0f, // Top Right 
     0.5f, -0.5f, 0.0f, // Bottom Right 
     -0.5f, -0.5f, 0.0f, // Bottom Left 
     -0.5f, 0.5f, 0.0f // Top Left 
    }; 
    GLuint indices[] = { // Note that we start from 0! 
     0, 1, 3, // First Triangle 
     1, 2, 3 // Second Triangle 
    }; 
    GLuint VBO, VAO, EBO; 
    glGenVertexArrays(1, &VAO); 
    glGenBuffers(1, &VBO); 
    glGenBuffers(1, &EBO); 

    glBindVertexArray(VAO); 

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

    glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, EBO); 
    glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(indices), indices, GL_STATIC_DRAW); 

    glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 3 * sizeof(GLfloat), (GLvoid*)0); 
    glEnableVertexAttribArray(0); 

    glBindBuffer(GL_ARRAY_BUFFER, 0); 

    glBindVertexArray(0); 

    glPolygonMode(GL_FRONT_AND_BACK, GL_LINE); 
    while (!glfwWindowShouldClose(window)) 
    { 
     glfwPollEvents(); 

     glClearColor(0.2f, 0.3f, 0.3f, 1.0f); 
     glClear(GL_COLOR_BUFFER_BIT); 

     // Draw our first triangle 
     glUseProgram(shaderProgram); 
     glBindVertexArray(VAO); 
//  glDrawArrays(GL_TRIANGLES, 0, 6); 
     glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, 0); 
     glBindVertexArray(0); 

     // Swap the screen buffers 
     glfwSwapBuffers(window); 
    } 

    glDeleteVertexArrays(1, &VAO); 
    glDeleteBuffers(1, &VBO); 
    glDeleteBuffers(1, &EBO); 

    glfwTerminate(); 
    return 0; 
} 

私はまだすべてのエラーを取得していないとクワッドがまだ表示されないし。

Answer 1

私はこの問題を発見しました。

それはラインです：

glEnable (GL_DEPTH_TEST); 

クワッドが表示されていないします。私はその行をコメントし、すべてが大丈夫になる。