Scripting - Per frame higher\lower in value equals 2004-04-13 - By Helge Mathee
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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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