绘制3d图形时出现的问题

// 初始化OpenGL
glEnable(GL_DEPTH_TEST);
glClearColor(0.0f, 0.0f, 0.0f, 1.0f);

// 绘制立方体
glBegin(GL_QUADS);
// 前后面
glVertex3f(-1.0f, -1.0f,  1.0f);
glVertex3f( 1.0f, -1.0f,  1.0f);
glVertex3f( 1.0f,  1.0f,  1.0f);
glVertex3f(-1.0f,  1.0f,  1.0f);
// ...其他面
glEnd();

glEnable(GL_CULL_FACE); // 启用面剔除
glCullFace(GL_BACK);    // 剔除背面

if (distance < 10.0f) {
    renderHighDetailModel();
} else if (distance < 50.0f) {
    renderMediumDetailModel();
} else {
    renderLowDetailModel();
}

GLfloat light_position[] = {1.0f, 1.0f, 1.0f, 0.0f};
GLfloat light_ambient[] = {0.2f, 0.2f, 0.2f, 1.0f};
GLfloat light_diffuse[] = {1.0f, 1.0f, 1.0f, 1.0f};
GLfloat light_specular[] = {1.0f, 1.0f, 1.0f, 1.0f};

glLightfv(GL_LIGHT0, GL_POSITION, light_position);
glLightfv(GL_LIGHT0, GL_AMBIENT, light_ambient);
glLightfv(GL_LIGHT0, GL_DIFFUSE, light_diffuse);
glLightfv(GL_LIGHT0, GL_SPECULAR, light_specular);