OpenGL太阳地球月亮纹理实现

#include "LoadBMP.h" void myinit(void) { glClearColor (0.0, 0.0, 0.0, 0.0); glEnable(GL_LIGHTING); glEnable(GL_LIGHT0); glEnable(GL_DEPTH_TEST); glEnable(GL_TEXTURE_2D); //启用二维纹理 GLfloat light0_ambient[] = {1, 1, 1, 1}; //环境光 GLfloat light0_diffuse[] = {1, 1, 1, 1}; //散射光 GLfloat light0_position[] = {0, 0, 0, 1}; //光源位置 glLightfv(GL_LIGHT0,GL_AMBIENT,light0_ambient); glLightfv(GL_LIGHT0,GL_DIFFUSE,light0_diffuse); glLightfv(GL_LIGHT0,GL_POSITION,light0_position); LoadAllTextures(); //调入纹理 } void myidle() { day+=angle; glutPostRedisplay(); } void mymouse(int button,int state,int x,int y) { if(state==GLUT_DOWN && button==GLUT_LEFT_BUTTON){ if(first) { glutIdleFunc(myidle); first=!first; } else { glutIdleFunc(0); first=!first; } } } void mykeyboard(unsigned char key, int x, int y) { if (key == 27) exit(0); } void mydisplay(void) { year=day/365; month=day/30; glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); GLfloat mat_ambient1[] = {1,0,0,1}; GLfloat mat_emission[] = {1,1,1,0}; GLfloat mat_ambient2[] = {0.4,0.4,0.8,1}; GLfloat no_emission[] = {0,0,0,1}; glPushMatrix(); glBindTexture(GL_TEXTURE_2D,sun->texID); glRotatef (month, 0.0, 1.0, 0.0); //太阳自转 glMaterialfv(GL_FRONT, GL_AMBIENT, mat_ambient1); glMaterialfv(GL_FRONT, GL_EMISSION, mat_emission); glRotatef (90, -1, 0, 0); gltDrawSphere(1.0, 40, 40); //绘制太阳 glPopMatrix(); glPushMatrix(); glRotatef (year, 0.0, 1.0, 0.0); //月亮与地球一起绕太阳转（地球公转） glPushMatrix(); glBindTexture(GL_TEXTURE_2D,earth->texID); glTranslatef (3.0, 0.0, 0.0); glRotatef (month, 0.0, 1.0, 0.0); //地球自转 glMaterialfv(GL_FRONT, GL_AMBIENT, mat_ambient2); glMaterialfv(GL_FRONT, GL_EMISSION, no_emission); glRotatef (90, -1, 0, 0); gltDrawSphere(0.4, 40, 40); //绘制地球 glPopMatrix(); glPushMatrix(); glBindTexture(GL_TEXTURE_2D,moon->texID); glTranslatef (3.0, 0.0, 0.0); glRotatef (60, -1, 1, 0); glRotatef (month, 0, 1.0, 0); //月球绕地球转 glTranslatef (0.6, 0.0, 0.0); glRotatef (90, -1, 0, 0); gltDrawSphere(0.07, 20, 20); //绘制月球 glPopMatrix(); glPopMatrix(); glFlush(); glutSwapBuffers(); } void myreshape (int w, int h) { glViewport (0, 0, (GLsizei) w, (GLsizei) h); //指定视口大小 glMatrixMode (GL_PROJECTION); glLoadIdentity (); gluPerspective(60.0, (GLfloat) w/(GLfloat) h, 1, 20); //透视投影 glMatrixMode(GL_MODELVIEW); glLoadIdentity(); gluLookAt (0.0, 0.0, 5.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0); //指定照相机的位置 } int main(int argc, char** argv) { glutInit(&argc, argv); glutInitDisplayMode (GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH); glutInitWindowSize (1000, 600); glutInitWindowPosition (100, 100); glutCreateWindow (argv[0]); myinit (); glutDisplayFunc(mydisplay); glutReshapeFunc(myreshape); glutIdleFunc(myidle); glutMouseFunc(mymouse); glutKeyboardFunc(mykeyboard); glutMainLoop(); return 0; }