glMatrixMode(GL_TEXTURE); glLoadIdentity()*; glMatrixMode(GL_PROJECTION); glLoadIdentity()*; glFrustum / glOrtho(l,r,b,t,n,f); glMatrixMode(GL_MODELVIEW); glLoadIdentity()*; glTranslatef(0.,0.,-distance); glVertex3fv(vcoord[i]);