Thread: OpenGL Viewports

I'm writign a 3D pool game, and want to have a plan view of the table aswell as the main 3D view

is it possable to only draw the scene once and have 2 separate viewports with different camera settings or will I have to draw it for each viewport?

in pseudocode

Code:

create viewport
setup camera

create second viewport
set up second camera

draw pool table

or

Code:

create viewport
setup camera
draw pool table

create second viewport
set up second camera

draw pool table

the only difference is that I draw the table trice on the second one, and I dont think it will effect performance too much, but if it can be drawn once it would be more convenient and give a small increase in performance

another question
when opening a window to draw to how do you make sure that the editable area of the window is at for example 640x480 and the window border goes around that?