void menu::render(){
    glDisable(GL_LIGHTING);
    glMatrixMode(GL_PROJECTION);
    glPushMatrix();
    glLoadIdentity();
    gluOrtho2D(0.0, 0, 0.0, 0);

    glMatrixMode(GL_MODELVIEW);
    glPushMatrix();
    glLoadIdentity();
    // Napisy

    string s1="Chuj do dupy!";
    DrawString(-0.8,0.8,s1,1,0,0);

    glMatrixMode(GL_MODELVIEW);
    glPopMatrix();

    glMatrixMode(GL_PROJECTION);
    glPopMatrix();
    glEnable(GL_LIGHTING);
}
void menu::DrawString( GLfloat x, GLfloat y, string string, float c1, float c2, float c3  )
{
    //kolor
    glColor4f(c1,c2,c3,1);
    // położenie napisu
    glRasterPos2f( x, y );

    // wyświetlenie napisu
    for( int i = 0; i < string.length(); i++ ){
            //cout<<string[i];
         glutBitmapCharacter( GLUT_BITMAP_TIMES_ROMAN_24, string[ i ] );
    }
}