[Bf-committers] Use cases for warp modifier?

[Daniel Salazar - 3Developer.com]

test doing a bulge effect with the then called Transform modifier :)

http://www.youtube.com/watch?v=gtK4rrPplnI

1 year old vid! somehow 2.5 still seems like the new thing to me! :p

Daniel Salazar
3Developer.com



On Fri, Jun 24, 2011 at 8:45 PM, Campbell Barton <ideasman42 at gmail.com> wrote:
> On Fri, Jun 24, 2011 at 7:52 PM, Bassam Kurdali
> <bkurdali at freefactory.org> wrote:
>> On Fri, 2011-06-24 at 21:15 +0200, Tobias Oelgarte wrote:
>>> Recently i noticed the "warp modifier" inside the current builds. In my
>>> understanding it works like an improved hook. But i had only very few
>>> cases in which needed hooks anyway. So im a bit puzzled. What is so
>>> special about this modifier? Any known usecases?
>>>
>>> At first i thought you had implemented the "warp tool" as an modifier
>>> and that it would be awesome. But then i tried it and didn't know what
>>> to say. Truthfully i was a bit disappointed. ;P But it gives me a
>>> headache; why we would need this modifier?
>> because it is great! TBH when I first saw it I thought I'd never need
>> it.
>>
>> it's very much like an improved hook, in that it is based on the
>> difference between a reference and target empty. This way you can move
>> the hook 'target' around without deforming the mesh (say with an
>> armature, avoiding double deform), and then still use it to add a bit on
>> top.
>>
>> use case: adding little tweak controls that let you modify the surface
>> on a rigged character with extra bulges and moves, more specific things
>> possible (e.g. muscles bulges, or in my case the lip-roll in and out
>> motions on the character - invaluable given my choice of face rig.)
>>
>> use case: a hook that, unlike hook, you can 'move it' around the
>> surface, so similar to lattice, you can move the deformation along the
>> surface, for instance, to make a depression that moves around with a
>> thing that causes it.
>>
>> It's a great modifier, but if you don't need it, don't use it. I think
>> it was used in Sintel, so poking around those files might also give you
>> clues.
>>>
>>> Greatings from
>>> Tobias Oelgarte
>
> Warp modifier was used in the Sentel room scene to animate her blanket
> (not exciting but was useful in this case apparently).
>
> Most of blenders deform tools use a fixed set of vertices, since the
> warp modifier isn't it gives it a few novel advantages,
>
> One example is an animal running about under a rug, you want the bulge
> to move about and be animated freely without worrying about which part
> of the rug.
> Shrink wrap could be used too but I noticed ray casts can jitter when
> the object moves about, Displace modifier with an object + texture
> could be used too, but with displacement you have less control, its
> only displacement in 1 direction.
> With warp, if you want to displace more you just drag the object more.
> To carry the creature-under-rug scenario further - with the warp
> modifier you can do squash/stretch/twisting or a temp offset of the
> deformation if the creature runs and stops suddenly.
>
> Not sure if that example is the best, but certainly if you have many
> modifiers applied and you end up with a confusing intersection, this
> could be used as a bandade without the going through the trouble of
> painting a new vertex group and assigning an extra armature.
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