We just started drawing 3D images. I would like 2 know how can I draw a 3D working Clock.

Thanks about that code for drawing a curve...
Question: When a curve is being on a window using glScalef() it is displayed on the bottom of the window and is cuted in half horizontally. I would...

How can I draw this mathematical function
f(x) = e^-x(cos(2(3.14285714)x))