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hw4.cpp
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// hw4.cpp : 定义控制台应用程序的入口点。
//
#include "stdafx.h"
#include <GL\freeglut.h>
#include<stdio.h>
#include<math.h>
#include<ctime>
#include<iostream>
using namespace std;
GLfloat sumRY = 0.0f, sumBig = 1.0f;
GLfloat earthTXY = 0.0f, ttTXY = 0.0f, earthRY = 0.0f, ttRY = 0.0f;
void drawing(float n) {
GLfloat t = n*0.5f;
glBegin(GL_QUADS);
//front red
glColor3f(1.0f, 0.0f, 0.0f);
glVertex3f(n, n, n);
glVertex3f(n, n, -n);
glVertex3f(-n, n, -n);
glVertex3f(-n, n, n);
/*glVertex3f(0.05f, 0.05f, -0.05f);
glVertex3f(-0.05f, 0.05f, -0.05f);
glVertex3f(-0.05f, 0.05f, 0.05f);*/
//bottom green
glColor3f(0.0f, 1.0f, 0.0f);
glVertex3f(n, n, -n);
glVertex3f(n, -n, -n);
glVertex3f(-n, -n, -n);
glVertex3f(-n, n, -n);
/*
glVertex3f(0.05f, 0.05f, -0.05f);
glVertex3f(0.05f, -0.05f, -0.05f);
glVertex3f(-0.05f, -0.05f, -0.05f);
glVertex3f(-0.05f, 0.05f, -0.05f); */
//top blue
glColor3f(0.0f, 0.0f, 1.0f);
glVertex3f(n, n, n);
glVertex3f(n, -n, n);
glVertex3f(-n, -n, n);
glVertex3f(-n, n, n);
/*
glVertex3f(0.05f, 0.05f, 0.05f);
glVertex3f(0.05f, -0.05f, 0.05f);
glVertex3f(-0.05f, -0.05f, 0.05f);
glVertex3f(-0.05f, 0.05f, 0.05f);*/
//behind purple
glColor3f(1.0f, 0.0f, 1.0f);
glVertex3f(n, -n, -n);
glVertex3f(n, -n, n);
glVertex3f(-n, -n, n);
glVertex3f(-n, -n, -n);
/*glVertex3f(0.05f, -0.05f, -0.05f);
glVertex3f(0.05f, -0.05f, 0.05f);
glVertex3f(-0.05f, -0.05f, 0.05f);
glVertex3f(-0.05f, -0.05f, -0.05f);*/
//left ao
glColor3f(1.0f, 1.0f, 0.0f);
glVertex3f(-n, -n, n);
glVertex3f(-n, n, n);
glVertex3f(-n, n, -n);
glVertex3f(-n, -n, -n);
/* glVertex3f(-0.05f, -0.05f, 0.05f);
glVertex3f(-0.05f, 0.05f, 0.05f);
glVertex3f(-0.05f, 0.05f, -0.05f);
glVertex3f(-0.05f, -0.05f, -0.05f);*/
//right yellow
glColor3f(0.0f, 1.0f, 1.0f);
glVertex3f(n, n, n);
glVertex3f(n, n, -n);
glVertex3f(n, -n, -n);
glVertex3f(n, -n, n);
/*glVertex3f(0.05f, 0.05f, 0.05f);
glVertex3f(0.05f, 0.05f, -0.05f);
glVertex3f(0.05f, -0.05f, -0.05f);
glVertex3f(0.05f, -0.05f, 0.05f);*/
glEnd();
}
void draw() {
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glTranslatef(0.0f, 0.0f, 0.0f);
glRotatef(sumRY, 0.0f, 1.0f, 0.0f); //绕着Y自传
glScalef(sumBig, sumBig, sumBig); //变大
drawing(0.1);//大概是太阳
glRotatef(ttRY, 0.0f, 1.0f, 0.0f);
glTranslatef(sumBig-1.0f+0.6f, 0.0f, 0.0f);
glRotatef(ttTXY, 1.0f, 1.0f, 0.0f); //绕着XY转
drawing(0.03); //地球
glPopMatrix();
glRotatef(earthRY, 0.0f, 1.0f, 0.0f);
glTranslatef(sumBig-1.0f+0.8f, 0.0f, 0.0f);
glRotatef(earthTXY, 1.0f, 1.0f, 0.0f); //绕着XY转
drawing(0.05); //地球2号
glPopMatrix();
}
void drawCube(void) {
glClearColor(0.0, 0.0, 0.0, 1.0);
glEnable(GL_DEPTH_TEST);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glLoadIdentity();
draw();
glutSwapBuffers();//双缓存
earthTXY += 0.1;
sumRY += 2;
ttTXY += 0.2f;
ttRY += 1.5;
earthRY -= 3;
sumBig += 0.0000001f;
glutPostRedisplay();
}
int main(int argc, char *argv[]) {
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DEPTH | GLUT_DOUBLE | GLUT_RGBA);
glutInitWindowPosition(100, 100);
glutInitWindowSize(640, 640);
glutCreateWindow("drawCube");
glutDisplayFunc(drawCube);
glutMainLoop();
return 0;
}