[Bf-funboard] UV space constraint (stick on surface)

[Hadrien Brissaud]

Thanks Douglas. I think this has the same shortcomings : shrinkwrap
projects onto a surface, but does not keep up with it when it moves away.
In addition to the shrinkwrap the object must be constrained by a bone that
follows the surface as close as possible (think of a jacket, or a human
body). Along with the childof+vgroup method - which kinda works to keep an
object attached and aligned, only it does not rotate along with it - this
is the more likely to work, but still requires an elaborate set up.

Mind you, so far I have managed without it ! I just figured it could be
made simpler.

Hadrien

On 13 February 2016 at 17:25, Hadrien Brissaud <hadriscus at gmail.com> wrote:

> Paweł it works alright with single fixed objects; however this parenting
> unlike a constraint is a fixed thing, so the object will always move along
> with its parent vertex... even when a bone childof-constrains it on top (=
> when you need to detach the object, you can't).
> Furthermore it is impossible to make it part of an armature, for no more
> than a single bone can be parented to a vertex (or a set of three
> vertices). That means no pose mode for animating the object itself, and it
> can't be part of the same action as the armature (granted this is not so
> important).
>
> On 13 February 2016 at 17:09, Paweł Łyczkowski <pawellyczkowski at gmail.com>
> wrote:
>
>> @Hadrien You can always use Parent to Vertex -
>>
>> http://blender.stackexchange.com/questions/34324/how-do-i-stick-an-object-to-another-objects-vertex
>>
>> On Sat, Feb 13, 2016 at 5:08 PM Hadrien Brissaud <hadriscus at gmail.com>
>> wrote:
>>
>> > I do not see a search field, but if you have an idea around what time
>> you
>> > made that suggestion we can find it. I am really curious to read what
>> was
>> > said.
>> >
>> > On 13 February 2016 at 17:03, Knapp <magick.crow at gmail.com> wrote:
>> >
>> > > http://lists.blender.org/mailman/listinfo/bf-docboard
>> > >
>> > > On Sat, Feb 13, 2016 at 4:48 PM, Hadrien Brissaud <
>> hadriscus at gmail.com>
>> > > wrote:
>> > >
>> > > > Any idea how I can search the mailing list archive ?
>> > > >
>> > > > On 13 February 2016 at 16:30, Knapp <magick.crow at gmail.com> wrote:
>> > > >
>> > > > > I posted this idea a few years ago. I can't remember the
>> conclusion
>> > now
>> > > > but
>> > > > > I am sure you could look it up. The back emails must be on the web
>> > > > > somewhere.
>> > > > > Douglas E Knapp
>> > > > >
>> > > > > On Sat, Feb 13, 2016 at 4:08 PM, Hadrien Brissaud <
>> > hadriscus at gmail.com
>> > > >
>> > > > > wrote:
>> > > > >
>> > > > > > Hi everyone,
>> > > > > >
>> > > > > > every now and then people on ba.org are asking about ways to
>> > > > constrain a
>> > > > > > object to a surface, like a shirt button, or any other prop
>> you'd
>> > > want
>> > > > to
>> > > > > > stick to a deforming surface. Right now the best way I can
>> think of
>> > > is
>> > > > > > parenting the object to a bone you've set up to follow the
>> surface
>> > as
>> > > > > > accurately as possible (along with shrinkwrap constraint, and so
>> > on),
>> > > > or
>> > > > > > using the dorito method with the new depsgraph (
>> > > > > > https://www.youtube.com/watch?v=SfgHAWTMLrE).
>> > > > > > The first is a workaround that's difficult to make accurate
>> while
>> > the
>> > > > > > second depends on the new depsgraph being active, and as far as
>> I
>> > > know
>> > > > it
>> > > > > > is note quite final.
>> > > > > >
>> > > > > > In maya one would use hair follicles, which are stuck to the
>> mesh
>> > in
>> > > uv
>> > > > > > space, and you'd constrain to one of these follicles whatever
>> it is
>> > > you
>> > > > > > want to be stuck onto the surface. It is a very straightforward
>> > > manner
>> > > > of
>> > > > > > solving this problem and I think having a uv space constraint in
>> > > > blender
>> > > > > as
>> > > > > > a separate method would be cool, until the new depsgraph lands
>> (I
>> > > don't
>> > > > > > know of an eta for this).
>> > > > > >
>> > > > > > So that was just an idea. Obviously I does not work with
>> > overlapping
>> > > > uvs,
>> > > > > > and it breaks if uvs change, but that's the toll. Thoughts ?
>> > > > > >
>> > > > > > Hadrien
>> > > > > > _______________________________________________
>> > > > > > Bf-funboard mailing list
>> > > > > > Bf-funboard at blender.org
>> > > > > > http://lists.blender.org/mailman/listinfo/bf-funboard
>> > > > > >
>> > > > >
>> > > > >
>> > > > >
>> > > > > --
>> > > > > Douglas E Knapp, MSAOM, LAc.
>> > > > > _______________________________________________
>> > > > > Bf-funboard mailing list
>> > > > > Bf-funboard at blender.org
>> > > > > http://lists.blender.org/mailman/listinfo/bf-funboard
>> > > > >
>> > > > _______________________________________________
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>> > > > http://lists.blender.org/mailman/listinfo/bf-funboard
>> > > >
>> > >
>> > >
>> > >
>> > > --
>> > > Douglas E Knapp, MSAOM, LAc.
>> > > _______________________________________________
>> > > Bf-funboard mailing list
>> > > Bf-funboard at blender.org
>> > > http://lists.blender.org/mailman/listinfo/bf-funboard
>> > >
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