旋轉的地球

#include <opencv/highgui.h>
#include <opencv/cv.h>
#include <GL/glut.h>
GLUquadric * quad=NULL;
float angle=0;
void display()
{
glEnable(GL_DEPTH_TEST);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glPushMatrix();
glRotatef(angle,0,1,0);
glRotatef(90,1,0,0);
gluQuadricTexture(quad,true);
gluSphere(quad,1,30,30);
glPopMatrix();
glutSwapBuffers();
}
void idle()
{
angle+=1;
glutPostRedisplay();
}
int main()
{
glutInitDisplayMode(GLUT_DOUBLE|GLUT_DEPTH);
glutCreateWindow("01160173");
glutDisplayFunc(display);
glutIdleFunc(idle);
glEnable(GL_TEXTURE_2D);
IplImage*img=cvLoadImage("earth.jpg");
cvCvtColor(img,img,CV_BGR2RGB);
GLuint id;
glGenTextures(1,&id);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_S,GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_T,GL_LINEAR);
glTexImage2D(GL_TEXTURE_2D,0,GL_RGB,img->width,img->height,0,GL_RGB,GL_UNSIGNED_BYTE,img->imageData);
quad=gluNewQuadric();
glutMainLoop();

}