drawing a circle does not display anything...?

Hello! I am doing a super quick crash course in OpenGL to prepare myself for some research in graphics that I am doing. I have been going through tutorials of drawing simple polygons and all was going great until I got to the circle :frowning: Everything seems to be compiling and I have googled a lot and everything looks ok…but when I build I just get a white screen. I was hoping to draw a unit circle…and I thought it might be a windowing issue but after searching some more I am not convinced anymore…can anyone help? Thanks!!

void myCircle()

	const float PI = 3.1415926535;
	double radius = 1.0;
	int i;
	int sides = 20;

	for(i = 0; i < 360; i += 360/sides)
		double angle = PI * i / 180;
		glVertex2d(cos(angle), sin(angle));


I know all of the other pieces of my code are correct because I am able to display other polygons. I’ve tried window sizes ranging up to 1000 x 1000 and still no luck :frowning:

Any help would be greatly appreciated!!

newbie mistake…I forgot my glFlush() at the end…works great!