OpenGL not drawing triangles

Question

我使用this tutorial來學習一些OpenGL。

但代碼不起作用 - 沒有顯示三角形。但是，繪製了上一個教程頁面中（0 | 0 | 0）處的點。

這裏是我的代碼：

#include <iostream> 
#include <stdio.h> 
#include <stdlib.h> 
#include <GL/glew.h> 
#include <GL/freeglut.h> 
#include "vector3f.hpp" 

GLuint VBO; 

static void RenderSceneCB() 
{ 
    glClear(GL_COLOR_BUFFER_BIT); 
    glEnableVertexAttribArray(0); 
    glBindBuffer(GL_ARRAY_BUFFER, VBO); 
    glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 0, 0); 
    glDrawArrays(GL_TRIANGLES, 0, 3); 
    glDisableVertexAttribArray(0); 
    glutSwapBuffers(); 
} 

static void InitializeGlutCallbacks() 
{ 
    glutDisplayFunc(RenderSceneCB); 
} 

static void CreateVertexBuffer() 
{ 
    Vector3f Vertices[3]; 
    Vertices[0] = Vector3f(-.5f, -.5f, .0f); 
    Vertices[1] = Vector3f(.5f, -.5f, .0f); 
    Vertices[2] = Vector3f(.0f, .5f, .0f); 

    glGenBuffers(1, &VBO); 
    glBindBuffer(GL_ARRAY_BUFFER, VBO); 
    glBufferData(GL_ARRAY_BUFFER, sizeof(Vertices), Vertices, GL_STATIC_DRAW); 
} 

int main(int argc, char* argv[]) { 
    short w = 640, h = 480; 
    short sw, sh; 
    setenv("DISPLAY", ":0.0", 0); 
    glutInit(&argc, argv); 
    sw = glutGet(GLUT_SCREEN_WIDTH); 
    sh = glutGet(GLUT_SCREEN_HEIGHT); 
    glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGBA); 
    glutInitWindowSize(w, h); 
    glutInitWindowPosition((short)(sw-w)/2, (short)(sh-h)/2); 
    glutCreateWindow("Tutorial 03"); 
    InitializeGlutCallbacks(); 

    GLenum res = glewInit(); 
    if (res != GLEW_OK) { 
     fprintf(stderr, "Error: '%s'\n", glewGetErrorString(res)); 
     return 1; 
    } 

    glClearColor(0.0f, 0.0f, 0.0f, 0.0f); 

    CreateVertexBuffer(); 

    glutMainLoop(); 

    return 0; 
} 

爲什麼不工作？我已經鏈接的所有庫（libGL.so，libglut.so，libGLEW.so）

我使用Ubuntu鉚足了勁64

Answer 1

答案在FAQ解釋說：http://ogldev.atspace.co.uk/faq.html。無着色器渲染僅適用於某些計算機。