#include

float fEarth = 2.0f;//地球绕太阳的旋转角度

float fMoon = 24.0f;//月球绕地球的旋转角度

void Init()

{

glEnable(GL_DEPTH_TEST);//启用深度测试

glClearColor(0.0f,0.0f,0.0f,0.8f);//背景为黑色

}

void Reshape(int width, int height)

{

if (0==height)

{

height = 1;

}

glViewport(0,0,width,height);//设置视区尺寸

glMatrixMode(GL_PROJECTION);//指定当前操作投影矩阵堆栈

glLoadIdentity();//重置投影矩阵

//指定透视投影的观察空间

gluPerspective(45.0f,(float)width/(float)height,1.0f,1000.0f);

glMatrixMode(GL_MODELVIEW);

glLoadIdentity();

}

void Display(void)

{

//清除颜色和深度缓冲区

glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);

//指定当前操作模型师徒矩阵堆栈

glMatrixMode(GL_MODELVIEW);

//重置模型视图矩阵

glLoadIdentity();

//图形沿Z轴负向移动

glTranslatef(0.0f,0.0f,-500.0f);

//绘制太阳

glColor3f(1.0f,0.0f,0.0f);

glutSolidSphere(50.0f,20,20);

glColor3f(0.0f,0.0f,1.0f);

//地球与太阳的黄赤交角

glRotatef(23.27,0.0,0.0,1.0);

glRotatef(fEarth,0.0f,1.0f,0.0f);

glTranslatef(200.0f,0.0f,0.0f);

//画地球

glutSolidSphere(20.0f,20,20);

glPopMatrix();

glPopMatrix();

glRotatef(6.0f,1.0f,1.0f,1.0f);

glRotatef(fMoon,0.0f,1.0f,0.0f);

glColor3f(1.0f,1.0f,0.0f);

glTranslatef(30.0f,0.0f,0.0f);

//月球

glutSolidSphere(5.0f,20,20);

glLoadIdentity();

glFlush();

glutSwapBuffers();

}

/*

在空闲时调用，动画效果

*/

void myIdle(void)

{

fEarth += 0.03f;//增加旋转步长，产生动画效果

if (fEarth>360.0f)

{

fEarth = 2.0f;

}

fMoon += 0.24f;

if (fMoon>360.0f)

{

fMoon = 24.0f;

}

Display();

}

int main(int argc,char* argv[])

{

glutInit(&argc,argv);

//窗口使用RGB色，双缓存和深度缓存

glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);

glutInitWindowPosition(200,100);//窗口位置

//窗口尺寸

glutInitWindowSize(600,460);

glutCreateWindow("基于Opengl的太阳系动画");

glutReshapeFunc(Reshape);

glutDisplayFunc(Display);

glutIdleFunc(&myIdle);

Init();

glutMainLoop();//

return 0;

}

运行效果：