 | | | Scripting - Per frame higher\lower in value equals | Scripting - Per frame higher\lower in value equals 2004-04-14 - By kim aldis
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You could use the velocity and accelaration properties. They need activating
first.
> -- --Original Message-- --
> From: owner-xsi@(protected)
> [mailto:owner-xsi@(protected)] On Behalf Of Bradley Kachel
> Sent: 14 April 2004 04:16
> To: XSI@(protected)
> Subject: Re: Scripting - Per frame higher\lower in value equals
>
> Big thanks for the advice guys.
>
> Helge, because the object going +\- on Y will be inheriting
> alot of it's motion (being a character) it won't have
> animation directly on it.
> So I'm guessing the only way around it is to plot it's
> transforms once the animation in final, and then let the
> expression do it's thing.
> Or is there a better way I don't see?
>
> Thanks again,
> Brad K
>
>
>
> >From: "Helge Mathee" <helge.mathee@(protected)>
> >Reply-To: XSI@(protected)
> >To: <XSI@(protected)>
> >Subject: Re: Scripting - Per frame higher\lower in value equals
> >Date: Tue, 13 Apr 2004 21:13:08 +0200
> >
> >I'd use an expression which uses the value at the current
> frame minus
> >the one at a frame before.
> >Evaluating a min max between 0 and 1 should work.
> >
> >Try_
> >
> >0.5 + MIN( MAX( ( null.kine.local.posy - at_frame( Fc - 1,
> >null.kine.local.posy ) ) / 0.3, -0.5 ), 0.5 )
> >
> >
> >Where 0.3 is the treshold so to say the maximum difference between
> >actual frame and the previous frame.
> >
> >Note: the parameter used (which is null.kine.local.posy in
> this case)
> >has to be driven by a fcurve!!
> >
> >-h
> >
> >-- -- Original Message -- --
> >From: "Bradley Kachel" <acidboy21@(protected)>
> >To: <XSI@(protected)>
> >Sent: Tuesday, April 13, 2004 8:44 PM
> >Subject: Scripting - Per frame higher\lower in value equals
> >
> >
> > > Hi guys,
> > > Just a simple scripting Q that I have no idea how to approach.
> > >
> > > I want to have a blend constraint value driven by whether another
> > > object
> >is
> > > going higher or lower in it's Y value.
> > >
> > > EG,
> > > If it is going higher in Y -> blend = 1, If lower in
> value -> blend
> > > = 0.3 Naturally it would have to be calculated each frame too.
> > >
> > > I'm using it to drive some simple armour on a character, so it
> > > sticks to
> >the
> > > body when it's going upward and dragging when going downward.
> > >
> > > Any advice would be majorly appreciated.
> > >
> > > Thanks.
> > > Brad K.
> > >
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