void scietystozek()
{
    glColor3f(1, 1, 1);
    glBegin(GL_TRIANGLE_FAN);
    glVertex3f(0, 0, 0);
    for (i = 0; i*dAlfa <= 360.0; i++)
    {
        glVertex3f(r*cos(DEG2RAD(i*dAlfa)), 0, r*sin(DEG2RAD(i*dAlfa)));
    }
    glEnd();

    glBegin(GL_TRIANGLE_FAN);
    glVertex3f(0, wys, 0);
    for (i = 0; i*dAlfa <= 360.0; i++)
    {
        glVertex3f(r/2*cos(DEG2RAD(i*dAlfa)), wys, r/2*sin(DEG2RAD(i*dAlfa)));
    }
    glEnd();
    glBegin(GL_LINES);

    for (i = 0; i*dAlfa <= 360.0; i++)
    {
        glVertex3f(r / 2 * cos(DEG2RAD(i*dAlfa)), wys, r / 2 * sin(DEG2RAD(i*dAlfa)));
        glVertex3f(r * cos(DEG2RAD(i*dAlfa)), 0, r  * sin(DEG2RAD(i*dAlfa)));
    }
    glEnd();
}