我無(wú)法使用C ++中的OpenGL庫(kù)函數(shù)glutSolidSphere（）創(chuàng)建簡(jiǎn)單的3D球體。這是我嘗試過(guò)的：#include<GL/glu.h> void display() {     glClear(GL_COLOR_BUFFER_BIT);     glColor3f(1.0,0.0,0.0);     glLoadIdentity();     glutSolidSphere( 5.0, 20.0, 20.0);     glFlush(); } void myInit() {    glClearColor(1.0,1.0,1.0,1.0);     glColor3f(1.0,0.0,0.0);     glMatrixMode(GL_PROJECTION);     glLoadIdentity();     gluOrtho2D(0.0,499.0,0.0,499.0);     glMatrixMode(GL_MODELVIEW); } void main(int argc,char **argv) {     qobj = gluNewQuadric();     glutInit(&argc,argv);     glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB);     glutInitWindowSize(500,500);     glutCreateWindow("pendulum");             glutDisplayFunc(display);     myInit();     glutMainLoop(); }