[Bf-committers] Use cases for warp modifier?

[Bassam Kurdali]

Rad my use case. I don't use it to bulge.
----- Original message -----
> Why not name it "Bulge"? That is basically what all practical uses are 
> for this modifier. I tested it   yesterday under some circumstances and 
> the best way to use it, was to stretch something (big bulge) or to 
> create moving bulges. At the end i came to this little testszenario, 
> using the warp-modifier 3 times:
> http://www.youtube.com/watch?v=RERPLWbUcvA
> 
> Am 25.06.2011 08:40, schrieb Campbell Barton:
> > I wasn't really happy with any names, though my second fav is
> > 'Transient Hook' :).
> > 'Pull' is too closely related to translation IMHO, 'Warp' vague term
> > but most correct IMHO.
> > also - better discuss this stuff before releases.
> > 
> > one other point, I find it limiting that the area dragged is always
> > spherical, the only way around this currently is to use a texture
> > which works ok,
> > you can for example use a blend texture to bend an object in half
> > (through rotation) and taper (through scaling).
> > 
> > On Sat, Jun 25, 2011 at 4:59 AM, Daniel Salazar - 3Developer.com
> > <zanqdo at gmail.com>   wrote:
> > > Ehm, the name is bad IMO. could be "pull" modifier?
> > > 
> > > cheers
> > > Daniel Salazar
> > > 3Developer.com
> > > 
> > > 
> > > 
> > > On Fri, Jun 24, 2011 at 10:48 PM, Daniel Salazar - 3Developer.com
> > > <zanqdo at gmail.com>   wrote:
> > > > 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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> > 
> > 
> 
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