sun_earth_moon_OpenGL.rar_moon_opengl 地

#include <GL/glaux.h> #include <GL/gl.h> #include <GL/glu.h> #include <GL/glut.h> #include <stdlib.h> #include <math.h> #define PI 3.1415926535898 static GLfloat year=0,day=0,hour=0; static GLfloat width,depth; void DrawOrbit(GLfloat r,GLint circle_points) { glBegin(GL_LINE_LOOP); for(int i=0;i<circle_points;i++) glVertex3f(cos(2*PI*i/circle_points)*r,0,sin(2*PI*i/circle_points)*r); glEnd(); } void init(void) { glClearColor(0.0,0.0,0.0,0.0); glShadeModel(GL_SMOOTH); GLfloat light_position[] = {4.0,1.0,4.0,0.0}; GLfloat white_light[] = {1.0,1.0,1.0,1.0}; GLfloat spot_direction[]={-1.0,0.0,-1.0}; GLfloat lmodel_ambient[] = {0.1,0.1,0.1,1.0}; glLightfv(GL_LIGHT0, GL_POSITION, light_position); //指定光源 glLightfv(GL_LIGHT0, GL_DIFFUSE, white_light); glLightfv(GL_LIGHT0, GL_SPECULAR, white_light); glLightf(GL_LIGHT0,GL_CONSTANT_ATTENUATION,1.5);//衰减因子 glLightf(GL_LIGHT0,GL_LINEAR_ATTENUATION,0.5); glLightf(GL_LIGHT0,GL_QUADRATIC_ATTENUATION,1.2); glLightf(GL_LIGHT0,GL_SPOT_CUTOFF,30.0); glLightfv(GL_LIGHT0,GL_SPOT_DIRECTION,spot_direction); glLightf(GL_LIGHT0,GL_SPOT_EXPONENT,2.0); glLightModelfv(GL_LIGHT_MODEL_AMBIENT, lmodel_ambient); glEnable(GL_LIGHTING); glEnable(GL_LIGHT0); glEnable(GL_DEPTH_TEST); } void display (void) { glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glMatrixMode(GL_PROJECTION); glLoadIdentity(); gluPerspective(45.0, (GLfloat) width/(GLfloat) depth, 1.0, 20.0); glMatrixMode(GL_MODELVIEW); glLoadIdentity(); gluLookAt(0.0,0.0,5.0,0.0,0.0,0.0,0.0,1.0,0.0); glPushMatrix(); glRotatef(10.0,1.0,0.0,0.0); { // GLfloat sun_mat_emission[] = {0.5f, 0.0f, 0.0f, 1.0f}; // glMaterialfv(GL_FRONT, GL_EMISSION, sun_mat_emission); glEnable(GL_COLOR_MATERIAL); glColorMaterial(GL_FRONT, GL_EMISSION); glColor3f(0.5,0.0,0.0); glutSolidSphere(0.5,20,16); /*draw sun*/ } glColor3f(0.5,0.5,0.5); DrawOrbit(1.5,100); glDisable(GL_COLOR_MATERIAL); glRotatef((GLfloat) year, 0.0,1.0,0.0); glTranslatef(1.5,0.0,0.0); glPushMatrix(); glRotatef((GLfloat) day, 0.0,1.0,0.0); { // GLfloat earth_mat_emission[] = {0.0f, 0.6f, 0.0f, 1.0f}; // glMaterialfv(GL_FRONT, GL_EMISSION, earth_mat_emission); glEnable(GL_COLOR_MATERIAL); glColorMaterial(GL_FRONT, GL_EMISSION); glColor3f(0.0,0.6,0.0); glutSolidSphere(0.2,10,8); /*draw earth*/ } glColor3f(0.5,0.2,0.5); glLineStipple(1,0x3F07); glEnable(GL_LINE_STIPPLE); DrawOrbit(0.5,100); glDisable(GL_LINE_STIPPLE); glDisable(GL_COLOR_MATERIAL); glPopMatrix(); glRotatef((GLfloat) hour, 0.0,1.0,0.0); glTranslatef(0.5,0.0,0.0); { GLfloat moon_mat_emission[] = {0.1f, 0.0f, 0.5f, 1.0f}; glMaterialfv(GL_FRONT, GL_EMISSION, moon_mat_emission); glutSolidSphere(0.1,8,6); /*draw moon*/ } glPopMatrix(); glutSwapBuffers(); } void reshape(int w, int h) { width=w; depth=h; glViewport(0,0, (GLsizei) w, (GLsizei)h); glMatrixMode(GL_PROJECTION); glLoadIdentity(); gluPerspective(45.0,(GLfloat) w/(GLfloat) h,1.0,20.0); glMatrixMode(GL_MODELVIEW); glLoadIdentity(); gluLookAt(0.0,0.0,5.0,0.0,0.0,0.0,0.0,1.0,0.0); } void myIdle(void) { year += 0.5; if( year > 360.0 ) year -= 360.0; day += 1.0; if( day > 360.0 ) day -= 360.0; hour += 2.0; if( day > 360.0 ) day -= 360.0; display(); } /*void mouse(int button, int state, int x, int y) { switch (button) { case GLUT_LEFT_BUTTON: if (state==GLUT_DOWN) { year += 0.5; if( year >= 360.0 ) year -= 360.0; day += 1.0; if( day >= 360.0 ) day -= 360.0; hour += 2.0; if( hour >= 360.0 ) hour -= 360.0; glutPostRedisplay(); } break; default: break; } }*/ /*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 'h': hour=(hour+20)%360; glutPostRedisplay(); break; case 'H': hour=(hour-20)%360; glutPostRedisplay(); break; default: break; } }*/ int main(int argc, char** argv) { glutInit(&argc, argv); glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH); glutInitWindowSize(500,500); glutInitWindowPosition(100, 100); glutCreateWindow(argv[0]); init(); glutDisplayFunc(display); glutReshapeFunc(reshape); // glutKeyboardFunc(keyboard); // glutMouseFunc(mouse); glutIdleFunc(&myIdle); glutMainLoop(); return 0; }