Re: animated extrusion

["adrian" <adrian.wyer(at)fluid-pictures.com>]

hooray for afterFX!

 

and boo to xsi's extrude tools

 

a

Adrian Wyer
Fluid Pictures
16-18 Beak Street
London
W1F 9RD
T: +44 (0) 20 7183 2160
www.fluid-pictures.com

----- Original Message -----

From: Kris Rivel

To: XSI(at)Softimage.COM

Sent: Tuesday, August 21, 2007 3:05 PM

Subject: Re: animated extrusion

Well they work fine but the problem is I'm tracking someone's hand in a shot.  They are drawing in air so I want to draw on this tube like thing with their movement.  An animated extrusion works fine but I have to painfully key the end value to match the acceleration and speed of the subject's hand.  I actually resorted to doing it with the Particular plugin for After Effects.  Just tracked a null to the subjects hand and import null and camera to After Effects.  I use the null anim to generate a particle based tube which moves in z space nicely.  The particular plugin produces some great effects very much like the Ipod nano commercial.  In case anyone is interested, you can see the technique here:

http://ayrshire.creativecow.net/articles/kramer_andrew/nano/index.htm

Kris

On 8/21/07, kim aldis <xsi(at)kim-aldis.co.uk> wrote:

I'm going to sound stupid now. Why doesn't an extrude or a curve deform work?

 

From: owner-xsi(at)Softimage.COM [mailto:owner-xsi(at)Softimage.COM] On Behalf Of Kris Rivel
Sent: 20 August 2007 19:09
To: XSI(at)Softimage.COMany
Subject: Re: animated extrusion

 

Gene, I can't animate the end value in extrude along curve because I basically need it in reverse.  The emission point needs to follow a subjects hand leaving an extruded tube behind.

Vincent, your method sounds like it might work but I have no idea how to implement these values into a script or _expression_.  I'm pretty beginner when it comes to anything involving scripting.

Kris

On 8/20/07, Vincent Fortin <vincent.fortin(at)ubisoft.com> wrote:

I was playing around with a few functions the other day that I found very useful…

Plot to curve the tip of your pen. To automate the extrusion length you can use GetClosestCurvePosition (from your tip obj) and GetPercentageFromU to drive the % parameter.

There might be an easier way but this ones' more fun J

 

Vincent

 

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From: owner-xsi(at)Softimage.COM [mailto: owner-xsi(at)Softimage.COM] On Behalf Of Kris Rivel
Sent: Monday, August 20, 2007 1:09 PM
To: XSI ListServer
Subject: animated extrusion

 

Looking to build some tubes that are being drawn on by someone's hand.  Any tips or trick how to go about doing this?

Kris