Re: [Algorithms] Return of the front clip plane

[Gil G. <gg...@ma...>]

> For reference we use feet as units, with a front clip of 1 foot and a back
> clip of 1000 feet.

I think we use a near clip plane of about 8 inches and the bbox we use to
keep the player from clipping into walls is entirely reasonable. In my
opinion, even if you could have a near clip plane of 0, you wouldn't really
want it anyway. Putting something right into the players face is
disorienting.
-Gil

----- Original Message -----
From: "Jason Zisk" <zi...@n-...>
To: <gda...@li...>
Sent: Thursday, August 03, 2000 10:46 AM
Subject: [Algorithms] Return of the front clip plane


> Hi everyone, if you all remember our last episode "Attack of the Front
Clip
> Plane", we all learned that the further it is out the better zbuffer
> accuracy you have.  Much was learned by most.  :)
>
> Pushing my front clip out to 1 unit solved all of my zbuffer artifacts
> nicely in the last game.  We are trying some new things for the new game
and
> running into a problem that was mostly glossed over in the prequel to this
> email: collision and clipping of close-by objects.  Our game is first
> person, and when you get within 1 unit of an object it will get clipped
out.
> This is obviously pretty nasty.  :)  I remember one solution to this
> suggested was to dynamically move the front clip each frame depending on
how
> close objects are.
>
> Another solution is to just make your player's bounding volume larger so
you
> can't get close enough to stuff to clip into it, this works okay but I
find
> that you have to keep the player from getting closer than 3 units with a 1
> unit clip because of viewport rotation (just keeping the player 1 unit
away
> is fine if you are staring straight at a wall but as soon as you rotate
the
> edges of your viewport will clip it).
>
> Anyone else have any other ideas?  Right now it looks like I might be
going
> the dynamic front clip route but I really don't want to, I have a feeling
we
> will be seeing lots of artifacts out in the wilderness because the player
> will always be walking by a tree that they might not even be looking at.
>
> For reference we use feet as units, with a front clip of 1 foot and a back
> clip of 1000 feet.
>
> Thanks,
>
> - Jason Zisk
> - nFusion Interactive LLC
>
>
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