openGL画直线、圆、椭圆(6)

cin>>choice;

switch(choice)

{

case 1:

glutCreateWindow("Bresenham circile"); /* window title */

glutDisplayFunc(display1); /* display callback invoked when window opened */ myinit(); /* set attributes */

glutMainLoop(); /* enter event loop */

break;

case 2:

glutCreateWindow("Digital Differential Analyser Line"); /* window title */ glutDisplayFunc(display2); /* display callback invoked when window opened */ myinit(); /* set attributes */

glutMainLoop(); /* enter event loop */

break; case 3:

glutCreateWindow("MidBresenhamEllipse"); /* window title */

glutDisplayFunc(display3); /* display callback invoked when window opened */ myinit(); /* set attributes */

glutMainLoop(); /* enter event loop */

} default: return 0; } return 0;