Changing PLayers view 90 degrees and forward

[??????]

I was wanting to make a swep that when you right clicked it set your view 90 degrees to the right and if you left clicked 90 degrees to the left.Also both need to go forward a little so you can see around corners. Please Help.

[CombineGuru]

[url]http://wiki.garrysmod.com/?title=Gamemode.CalcView[/url]