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GitHub项目地址

核心代码如下：

// orgin.cpp : 此文件包含 "main" 函数。程序执行将在此处开始并结束。//#include "pch.h"#include 
   
    #include 
    
     #include 
     
      #include 
      
       #include 
       
        #include 
        
         #include 
         
          #include 
          
           using namespace std;bool bPersp = false;int year = 0, day = 0, marsYear = 0;int speed = 12;float light_angle = 0;bool bWire = false;float light_radius = 8.0;float eye[] = { 5.5, 1.7, 1.7};float center[] = { 0, 0, 0 };int wHeight = 0;int wWidth = 0;int state = 1;float star[1000][3];GLUquadricObj *g_text;void lPosition(){ float y, z; y = light_radius * cos(light_angle); z = light_radius * sin(light_angle); float light_position[] = { 3.0, y, z, 0.0 }; glLightfv(GL_LIGHT0, GL_POSITION, light_position);}void init(void){ glClearColor(0.0, 0.0, 0.0, 0.0); lPosition(); glShadeModel(GL_SMOOTH); glEnable(GL_LIGHTING); glEnable(GL_LIGHT0); glEnable(GL_DEPTH_TEST); glEnable(GL_COLOR_MATERIAL); g_text = gluNewQuadric();}void init_stars(){ for (int i = 0; i < 1000; i++) for (int j = 0; j < 3; j++) star[i][j] = rand() % 20 - 10;}void stars(){ glBegin(GL_POINTS); glColor3f(1.0f, 1.0f, 1.0f); for (int i = 0; i < 1000; ++i) { glVertex3f(star[i][0], star[i][1], star[i][2]); } glEnd();}void sun(){ glPushMatrix(); glColor3f(1.0f, 0.0f, 0.0f); gluSphere(g_text, 0.7, 32, 32); glPopMatrix();}void earth(){ glPushMatrix(); glColor3f(0.0f, 0.0f, 1.0f); glRotatef((GLfloat)year / 10, 0.0, 0.0, 1.0); glTranslatef(2.1, 0.0, 0.0); glRotatef((GLfloat)day / 10, 0.0, 0.0, 1.0); gluSphere(g_text, 0.25, 20, 16); glColor3f(1.0f, 1.0f, 0.0f); glRotatef((GLfloat)year / 10, 0.0f, 0.0f, 1.0f); glRotatef(day / 30.0 * 360.0, 0.0f, 0.0f, 1.0f); glTranslatef(0.3f, 0.0f, 0.0f); gluSphere(g_text, 0.06, 20, 16); glPopMatrix();}void mars(){ glPushMatrix(); glColor3f(166.0 / 256, 119.0 / 356, 67.0 / 256); glRotatef((GLfloat)marsYear / 10, 0.0, -1.0, 1.0); glTranslatef(3.2, 1.0, 0.0); glRotatef((GLfloat)day, 0.0, 0.0, 1.0); gluSphere(g_text, 0.23, 20, 16); glPopMatrix();}void redraw(void){ lPosition(); glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); if (bWire) { glPolygonMode(GL_FRONT_AND_BACK, GL_LINE); } else { glPolygonMode(GL_FRONT_AND_BACK, GL_FILL); } glColor3f(1.0, 1.0, 1.0); glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR); glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR); glEnable(GL_TEXTURE_2D); stars(); sun(); earth(); mars(); glDisable(GL_TEXTURE_2D); glutSwapBuffers();}void cPosition(){ glLoadIdentity(); cout << "eye[0] : " << eye[0] << " eye[1] : " << eye[1] << " eye[2] : " << eye[2] << endl; gluLookAt(eye[0], eye[1], eye[2], center[0], center[1], center[2], 0.0, 0.0, 1.0);}void updateView(int width, int height){ glViewport(0, 0, (GLsizei)width, (GLsizei)height); glMatrixMode(GL_PROJECTION); glLoadIdentity(); if (!bPersp) { gluPerspective(65.0f, (GLfloat)width / (GLfloat)height, 1.0f, 100.0f); } else { glOrtho(-3, 3, -3, 3, -100, 100); } glMatrixMode(GL_MODELVIEW); cPosition();}void reshape(int width, int height){ wHeight = height; wWidth = width; updateView(wWidth, wHeight);}void move(){ year = (year + 8) % 3600; marsYear = (marsYear + 6) % 3600; day = (day + 30) % 3600;}void keyboard(unsigned char key, int x, int y){ switch (key) { case 'p': { bPersp = !bPersp; updateView(wWidth, wHeight); break; } case 'o': { bWire = !bWire; break; } case 'w': { eye[0] += 1; center[0] += 1; cPosition(); break; } case 'a': { eye[1] += 1; center[1] += 1; cPosition(); break; } case 's': { eye[0] -= 1; center[0] -= 1; cPosition(); break; } case 'd': { eye[1] -= 1; center[1] -= 1; cPosition(); break; } case 'z': { eye[2] -= 1; center[2] -= 1; cPosition(); break; } case 'c': { eye[2] += 1; center[2] += 1; cPosition(); break; } case 'r': eye[0] = 5.5; eye[1] = 1.7; eye[2] = 1.7; center[0] = 0; center[1] = 0; center[2] = 0; cPosition(); break; case 'q': { exit(0); break; } default: break; }}void myIdle(void){ Sleep(speed); move(); glutPostRedisplay();}int main(int argc, char **argv){ cout << "WASDZC change the Camera Position" << endl; cout << " O change GL_LINE GL_FILL" << endl; cout << " P change the Perspective orthographic projection" << endl; cout << " R reset the Camera" << endl; cout << endl << endl << "By Zhang Sidan : Nov. 2018" << endl; glutInit(&argc, argv); glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH); glutInitWindowSize(1080, 680); glutInitWindowPosition(100, 100); glutCreateWindow(argv[0]); init(); init_stars(); glutDisplayFunc(redraw); glutReshapeFunc(reshape); glutKeyboardFunc(keyboard); glutIdleFunc(&myIdle); glutMainLoop(); return 0;}
          
         
        
       
      
     
    
   

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