How to convert OpenGL floating-point coordinates into plastic coordinates?

You see, if you want to write vertices in integers, you have to change them to the following.

zint = int(z)； //Very good

//Just look at the following example.

Floating? x=0.0f，y = 0.0f

int？ xint = int(x)；

int？ yint = int(y)；

glClearColor？ (0.0f，？ 0.0f，？ 1.0f，？ 0.0f)；

glClear？ (GL _ COLOR _ BUFFER _ BIT)；

glPushMatrix？ ();

glRotatef？ (θ，？ 1.0f，？ 0.0f，？ 0.0f)；

Jill Bei Jing? (GL _ POINTS)；

glColor3f？ ( 1.0f，？ 1.0f，？ 1.0f)； glVertex2i？ (xint，？ yint)；

Glenn. ();

glPopMatrix？ ();

Exchange buffer? (hDC)；

θ？ +=? 0.3f

Sleep? (0);