OpenGL模拟太阳、地球、月球公转自转

// OpenGL_Prac.cpp : Defines the entry point for the console application.//#include "stdafx.h"#include <gl/glut.h>#include <math.h>#define C_PI 3.14159265358979GLdouble distanceSunToEarth = 70;//日地距离GLdouble distanceMoonToEarth = 35;//月地距离GLdouble gzAngleEarth = 0;//地球绕太阳的公转角度GLdouble gzAngleMoon = 0;//月球绕地球的公转角度GLsizei zzAngle = 0;//自转角度int earthX = distanceSunToEarth;int earthY = 0;int earthZ = 0;int moonX = distanceSunToEarth + distanceMoonToEarth;int moonY = 0;int moonZ = 0;void drawPlanet(int r, GLdouble x0, GLdouble y0, GLdouble z0 ){glMatrixMode(GL_MODELVIEW);glPushMatrix();glRotatef(70.0 , 1.0, 0.0, 0.0);glTranslatef(x0, y0, z0);glRotatef(zzAngle, 0.0, 0.0, 1.0);glutWireSphere(r, 30, 10);glPopMatrix();}void init(){glClearColor(0.0, 0.0 , 0.0, 0.0);glShadeModel(GL_FLAT);}void reshape(int w, int h){glViewport(0,0,(GLsizei)w, (GLsizei)h);glMatrixMode(GL_PROJECTION);glLoadIdentity();gluPerspective(60.0, (GLfloat)w/(GLfloat)h, 0, 20.0);glMatrixMode(GL_MODELVIEW);glLoadIdentity();gluLookAt(0.0, 0.0, distanceSunToEarth + 100, 0.0, 0.0, 0.0, 0.0, 1.0, distanceSunToEarth + 100);}void keyboard(unsigned char key, int x, int y){switch(key){case 'r':gzAngleEarth += C_PI/180;earthX = (GLdouble)distanceSunToEarth * cos(gzAngleEarth);earthY = distanceSunToEarth * sin(gzAngleEarth);zzAngle = (zzAngle + 10)%360;gzAngleMoon += C_PI/45;moonX = earthX + distanceMoonToEarth * cos(gzAngleMoon);moonY = earthY + distanceMoonToEarth * sin(gzAngleMoon);glutPostRedisplay();break;case 's':glutPostRedisplay();break;}}void display(){glClear(GL_COLOR_BUFFER_BIT);glColor3f(1.0, 1.0, 1.0);//draw sundrawPlanet(30, 0, 0, 0);//draw earthdrawPlanet(20, earthX, earthY, earthZ);//draw moondrawPlanet(10, moonX, moonY, moonZ);glutSwapBuffers();}int _tmain(int argc, _TCHAR* argv[]){glutInit(&argc, (char**)argv);glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB);glutInitWindowSize(1024, 768);glutInitWindowPosition(0, 0);glutCreateWindow("Nehe 01");init();glutDisplayFunc(display);glutKeyboardFunc(keyboard);//glutTimerFunc(100, timer, );glutReshapeFunc(reshape);glutMainLoop();return 0;}

 

Just For Test.