Re: [Quake-devel] The Quake engine, interpolation vs extrapolation(was Re: Introductory documentation)

[Dave K. <zo...@th...>]

> On Fri, 26 May 2000, Dave Kirsch wrote:
>
> > This is why I said a Quake and QW merge would be insane, since Quake
_was_
> > interpolated (at 20Hz).  That's why it was easy to add alias model
> > interpolation to Quake since you just interpolate between the 20Hz
frames.
>
> Quake models are animated at 20Hz?  (so 5 frames of animation would take
> 0.25 seconds?)  I've been working with Quake for a long time, but I've
> never really been sure about this since it is hard to get Quake to run at
> a consistent speed.

I think they are animated at 10Hz, just the server runs at 20.

> What about extrapolating alias model animation? (or in other words
> interpolating between the current frame and the next frame in the scene,
> based on the assumption that it is going to be the next frame most of the
> time.)

Might work.  Sometimes you can't extrapolate.  What if you are wrong and
start the walk sequence and then find out the character jumped?  In Quake,
it's not an issue since the jump frame is immediate, but other games may
have more strict requirements.

/// Zoid.