That works...
Bit weird that you can't set an expression directly on a RGB parameter within a Proprty page though..
________________________________
From: owner-xsi(at)Softimage.COM on behalf of Sandy Sutherland
Sent: Wed 05/09/2007 21:53
To: XSI(at)Softimage.COM
Subject: Re: Bouncing/Blinking
Actually if you go to an explorer and find a ball for e.g. - then
navigate into the ball, you will see a blue mat node, open that, then
open the surface node, then the shader node where you will find a colour
node - inside this, are all 4 divots for RGBA - each can be animated
here, or have an expression added or whatever!!
Hope it helps
S.
Prapas Akie wrote:
>
> Actually, the balls change to white in 5 frames *_once_* they hit the
> ground. The ground is a flat plan so it all happens at Y=0 but, there
> are a few hundred balls with their own timing.
>
> I know I can create a new pass and new MAT anim but that would have to
> be hand-adj in the dopesheet for each ball at the frame it hits the
> ground.
>
> I don't mind the labour, I'm hoping to save some time and hopefully
> learn something new (in case they decide to double the amount of balls
> again to 500).
>
> BTW, the "RGB color" does not allow for an expression to be created.
>
> Thanks
>
> Akie Prapas
> Infographiste 3D VFX
> Les Chaines Tele Astral Inc.
> 514.938.3320 X-4540
>
> ------------------------------------------------------------------------
>
> *De :* owner-xsi(at)Softimage.COM [mailto:owner-xsi(at)Softimage.COM] *De la
> part de* James Easter
> *Envoyé :* 5 septembre 2007 15:29
> *À :* XSI(at)Softimage.COM
> *Objet :* Re: Bouncing/Blinking
>
> Hmmmmm... well assuming you have a flat ground plane you could link
> the color to the global y position so that as the balls
> neared/hit/rebounded the ground their color would change. Basically as
> they reach a certain point in the global Y (above the ground) the
> color changes. If you have multiple ground levels then this would be
> trickier. Perhaps this is something that can be done in post?
>
> ~ JamesCG
>
> On 9/5/07, *Prapas Akie* <aprapas(at)chaines.astral.com
> <mailto:aprapas(at)chaines.astral.com>> wrote:
>
> Hello,
>
> I have a scene that started with a few random 'bouncing balls' in
> military formation that has now turned into a few hundred random
> bouncing balls still in military formation.
>
> Now the client would like the balls to 'blink' (basically change color
> to white over 5 frames) when they hit the ground.
>
> I tried to apply an expression to the material (RGB values) with no
> success. It seems that feature is N/A.
>
> Is there a miraculous fix for this scenario or am I SOL with a one at
> a time modif?
>
> Thanks and have a goodday.
>
> Akie Prapas
>
--
----------------------------------------------------------
Sandy Sutherland Digital Doodeller - TD
Blackginger (Cape) http://www.blackginger.tv <http://www.blackginger.tv/>
mailto:sandy(at)blackginger.tv
(P) (+27 21) 488 1188 (Cel) 0827893789
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