用OpenGL编写的太阳地球月球小程序

#include<GL/glut.h> #pragma comment(lib, "opengl32.lib") #pragma comment(lib, "glu32.lib") #pragma comment(lib, "glut32.lib") #include<stdio.h> #include <windows.h> static int year = 0, day = 0, month = 0, solid = 0; void spinDisplay(void) { year += 10; day +=5; month += 2; if(year > 360) year -= 360; if(day > 360) day -= 360; if(month > 360) month -= 360; if(solid > 360) solid -= 360; glutPostRedisplay(); Sleep(1000); } void mouse(int button, int state, int x, int y) { switch(button) { case GLUT_LEFT_BUTTON: if(state == GLUT_DOWN) glutIdleFunc(spinDisplay); break; default: break; } } void init(void) { glClearColor(0.0, 0.0, 0.0, 0.0); glShadeModel(GL_FLAT); } void display(void) { // 画红色的太阳 glClear(GL_COLOR_BUFFER_BIT); glColor3f(1.0, 0.0, 0.0); glPushMatrix(); glutWireSphere(1.0, 15, 16); glRotatef((GLfloat) year, 0.0, 1.0, 0.0); //地球绕太阳公转 glRotatef(40.0, 1.0, 0.0, 0.0); //画蓝色的地球 glColor3f(0.0, 0.0, 1.0); glTranslatef(2.0, 0.0, 0.0); glRotatef((GLfloat) day, 0.0, 1.0, 0.0); //地球绕自己的轴自转 glutWireSphere(0.2, 10, 8); //画黄色的月球 glColor3f(1.0, 1.0, 0.0); glPushMatrix(); glRotatef((GLfloat) month, 0.0, 1.0, 0.0); //月亮绕地球公转 glTranslatef(0.5, 0.0, 0.0); glRotatef((GLfloat) solid, 0.0, 1.0, 0.0); //月亮绕自己的轴自转 glutWireSphere(0.1, 5, 4); glPopMatrix(); glPopMatrix(); glutSwapBuffers(); } void reshape(int w, int h) { glViewport(0, 0, (GLsizei) w, (GLsizei) h); //左下角坐标为（0,0），宽度为w,高度为h glMatrixMode(GL_PROJECTION); glLoadIdentity(); gluPerspective(60.0, (GLfloat) w / (GLfloat) h, 1.0, 20.0); //平面上视野的角度60，纵横比，近侧和远侧的距离 glMatrixMode(GL_MODELVIEW); //视图和模型变换 glLoadIdentity(); gluLookAt(0.0, 0.0, 5.0, 0.0, 0.0, 1.0, 0.0, 1.0, 0.0); //前三个坐标为眼睛的位置，中间是看的方向，后部是向上的方向 } void keyboard(unsigned char key, int x, int y) { switch(key) { case 'd': day = (day + 10) % 360; glutPostRedisplay(); break; case 'D': day = (day - 10) % 360; glutPostRedisplay(); break; case 'y': year = (year + 5) % 360; glutPostRedisplay(); break; case 'Y': year = (year - 5) % 360; glutPostRedisplay(); break; case 'm': month = (month + 2) % 360; glutPostRedisplay(); break; case 'M': month = (month - 2) % 360; glutPostRedisplay(); break; case 's': solid = (solid + 2) % 360; glutPostRedisplay(); break; case 'S': solid = (solid - 2) % 360; glutPostRedisplay(); break; default: break; } } int main(int argc, char**argv) { glutInit(&argc, argv); glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB); glutInitWindowSize(1000, 1000); glutInitWindowPosition(100, 100); glutCreateWindow("hello"); init(); glutDisplayFunc(display); glutReshapeFunc(reshape); glutKeyboardFunc(keyboard); glutMouseFunc(mouse); glutMainLoop(); return 0; }