CGTalk - How to make a 4 cornered face slider?

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griffinryan

02-20-2009, 02:27 AM

First off I am glad to be here. So here is my question. I am trying to created a four cornered nurbs slider that can be use to drive joint based face shapes. For instance I need to have a LT_Corner_up shape at 1TY and 1TX, then the LT_Corner_down at -1TY and 1TX. The RT_Corner_up will be at 1TY and -1TX, and the RT_Corner_down will be at 1TY and -1TX. The of course you will get a full smile at 1TY and 0TX and a full frown at -1TY and 0TX. I am sure you see the problem is that these coordinates overlap thus nulling out my setup. I had a simple solution to this issue a few years back but for the life of me can't remember what it was or where I put those notes. I know I get the effect I want by hooking up some distance dimension nodes, however I was hoping for an easier solution. Can anyone help?
http://picasaweb.google.com/ryangrif/ForTurbineDocs#5304697802068784434

kataze

02-20-2009, 06:10 AM

i`m not knowing how to do that ... but maybe this guy`s rig is what you want

http://www.rigging101.com/free/rigs/pm.zip

so maybe you can check the hypergraph:connection to see how he did it ?

hope this help

shinyprem

02-20-2009, 09:03 AM

Hi.. Try this link http://www.highend3d.com/maya/downloads/mel_scripts/interface_display/sliderList-mel-3195.html
a---------b

c---------d
Let the be your square slider. You should get the following exp using utilities node.
b---> (x+1)*y
a---> -(x+1)*y
d---> (x+1)*(-y)
c----> -(x+1)*(-y)

Rgds,

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