openGL-----地球与太阳绕转代码

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</pre><pre name="code" class="cpp">#define GLUT_DISABLE_ATEXIT_HACK#include <stdlib.h>#include <stdio.h>#include <GL/glut.h>#include <GL/gl.h>#include <GL/glu.h>static int year=0,day=0;void init(void){glClearColor(0.0,0.0,0.0,0.0);glShadeModel(GL_FLAT);}void display(void){glClear(GL_COLOR_BUFFER_BIT);glColor3f(1.0,1.0,1.0);glPushMatrix();glutWireSphere(1.0,20,16);glRotatef((GLfloat)year,0.0,1.0,0.0);glTranslatef(2.0,0.0,0.0);glRotatef((GLfloat)day,0.0,1.0,0.0);glutWireSphere(0.2,10,8);glPopMatrix();glutSwapBuffers();}void reshape(int w,int h){glViewport(0.0,0.0,(GLsizei)w,(GLsizei)h);glMatrixMode(GL_PROJECTION);glLoadIdentity();gluPerspective(60.0,(GLfloat)w/(GLfloat)h,1.0,20.0);glMatrixMode(GL_MODELVIEW);glLoadIdentity();gluLookAt(0.0,0.0,5.0,0.0,0.0,0.0,0.0,1.0,0.0);}void keyboard(unsigned char key,int x,int y){switch(key){    case 'd':day=(day+10)%360;glutPostRedisplay();break;case 'D':day=(day-10)%360;glutPostRedisplay();break;case 'y':year=(year+5)%360;glutPostRedisplay();break;case 'Y':year=(year-5)%360;glutPostRedisplay();break;}}int main(int argc,char **argv){glutInit(&argc,argv);glutInitDisplayMode(GLUT_DOUBLE|GLUT_RGB);glutInitWindowSize(500,500);glutInitWindowPosition(100,100);glutCreateWindow(argv[0]);init();glutDisplayFunc(display);glutReshapeFunc(reshape);glutKeyboardFunc(keyboard);glutMainLoop();return 0;}

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