#import <Foundation/Foundation.h>

#include <GLUT/GLUT.h>

static int year=,day=;

void init()

{

    glClearColor(,,,);

    glShadeModel(GL_FLAT);

}

void display()

{

    glClear(GL_COLOR_BUFFER_BIT);

    glColor3f(,,);

    glPushMatrix();

    glutWireSphere(,,);

    glRotatef((GLfloat)year,,,);

    glTranslated(,,);

    glRotatef((GLfloat)day,,,);

    glutWireSphere(0.2,,);

    glPopMatrix();

    glutSwapBuffers();

    }

void reshape(int w,int h)

{

    glViewport(, , (GLsizei)w, (GLsizei)h);

    glMatrixMode(GL_PROJECTION);

    glLoadIdentity();

    gluPerspective(,(GLfloat)w/(GLfloat)h,,);

    glMatrixMode(GL_MODELVIEW);

    glLoadIdentity();

    gluLookAt(,,,,,,,,);

}

void fishboard()

{

    day=(day+)%;

    year=(year+)%;

    glutPostRedisplay();

}

void timerProc(int id)

{

    fishboard();

    glutTimerFunc(,timerProc,);//需要在函数中再调用一次，才能保证循环

}

int main(int argc,char **argv)

{

    glutInit(&argc, argv);

    glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB);

    glutInitWindowSize(, );

    glutInitWindowPosition(,);

    glutCreateWindow("Xcode Glut Demo");

    init();

    glutDisplayFunc(display);

    glutReshapeFunc(reshape);

    glutTimerFunc(,timerProc,);

    glutMainLoop();

    return ;

}