Re: Modo's Deformation (Weight Containers)

[Tim Crowson]

Title: Signature

Rich may be along shortly to clarify some things... -Tim C. On 4/13/2013 2:25 PM, Eric Turman wrote: It reminds me of weighting in Maya how each of the maps were separate...what a PITA! Maya had (and maybe still has --I haven't looked at 2014) the worst enveloping blech! On Sat, Apr 13, 2013 at 1:33 PM, jo benayoun <jobenay...@gmail.com> wrote: actually, this is not really new and is quite similar to the way envelopping is done for years in the in-house 3D package at R+H from what I remember.  They had a complete different way to do rigging/skinning that I was used to see in other studios.  I wouldn't be surprised, this feature is coming from one of those big. -- jon Le samedi 13 avril 2013, Sebastien Sterling a écrit : (this may be a stupid assumption) i didn't exactly follow all the dude was saying, thx matt for the clarification, his examples where very abstract... would being able to disassociate parent hierarchy have any effect on gimble lock ? making it easier to evade ? On 13 April 2013 17:23, Marco Peixoto <mpe...@gmail.com> wrote: At first I thought that it was a simple Pose based Deformation like Secondary Shape Modeling, but its not. He says that Modo has now a very similar Weighting System that Pixar uses (he doesnt say that on the video but he did on the forums) and that video was to show what Hippodrome (ex Pixar character Modeler) will be teaching on its coming iBook "Art of Moving Points": http://hippydrome.com/iBookExmpls.html On 13-04-2013 16:06, Christopher wrote: I watched the video, interesting stuff, I'd like to see a comparison between what was shown in the video and Softimage, specifically what I liked in the Modo video was the sliding skin effect. Christopher Matt Lind Friday, April 12, 2013 11:19 PM Basically the guy took 24 minutes to explain a 2 minute concept.   The main point is Modo can define the order in which deformers are evaluated to solve envelope weights, and envelope weights are assigned using 'weight containers' which are logical assignments of points to deformers.  A different kind of weight map.   The example shows an arm enveloped over 2 bones (3 joints).  In Softimage you'd normally place the bones into a hierarchy and assign the weights to the joints.  as you rotate the shoulder, the elbow and wrist would tag along for the ride via inheritance of the shoulder's transformation.  If you rotate the elbow, the shoulder is unaffected, but the wrist moves because it inherit's the elbow's transformation.  The point being the deformer has to reside in the location of the envelope deformation, and this can be inconvenient for thinking/viewing certain problems such as wanting to only rotate a deformer by a few degrees.  in the case of the elbow, it may already be rotated to some arbitrary angle making adding/subtracting a few degrees difficult to visualize.   In Modo, the weights were assigned to the individual bones via 'weight containers' (their version of a weight map), but the bones were not placed into a hiearchy.  they were scattered about wherever was convenient.  This allowed the artist to work with the deformations in the local space of the deformer so if he wanted to say, limit envelope deformations to rotations of 10 degrees or less, the artist could easily see a 10 degree rotation and work with the deformer weights.  think of it as compensation mode for vertices of an envelope.  You apply the envelope to the defomers, but -- -=T=- --