OpenGL:太阳、地球、月球模型模拟动画

源代码：

#include<stdio.h>
#define GLUT_DISABLE_ATEXIT_HACK
#include<gl/GLUT.H>


static float year = 0, day = 0;


void init(void)
{
glClearColor(0.0,0.0,0.0,0.0);
glShadeModel(GL_FLAT);//设定着色模式，使用图元中某个顶点的颜色来渲染整个图元。
}


void display(void)
{
glClear(GL_COLOR_BUFFER_BIT);
glColor3f(1.0,1.0,1.0);
glLoadIdentity();
glPushMatrix();
gluLookAt(0.0,0.0,5,0.0,0.0,0.0,0.0,1.0,0.0);


//绘制太阳
glRotatef((GLfloat)year,0.0,1.0,0.0);
glutWireSphere(0.8,20,20);