[Bf-funboard] Reasoning behind child - parent coordinates

[Gatis Kurzemnieks]

I dont think it is because of dependancy graph (My guess).. I think it is
just a weird design decision.
On Fri 17 Apr 2015 at 20:51 Jeffrey <italic.rendezvous at gmail.com> wrote:

> I would hope so. I've found this functionality very confusing myself. We
> should at least be able to access the offset as a setting.
>
> On 04/17/2015 09:59 AM, Knapp wrote:
> > On Fri, Apr 17, 2015 at 6:00 PM, Gatis Kurzemnieks <
> > gatis.kurzemnieks at gmail.com> wrote:
> >
> >> Hello.
> >> I am wondering what is the logic behind Blenders weird coordinate
> >> calculations when doing parenting operations. What I mean is that child
> >> objects local coordinates are not real local in relation to parent, but
> >> there is the hidden "origin" transformation "matrix_parent_inverse"
> which
> >> is not represented in UI in any way.
> >> Simple example : Create two objects at 0,0,0. Move one object somewhere
> and
> >> then take the first object (still at 0,0,0) and parent it to moved
> object.
> >> You would expect that child objects coords would now be offset relative
> >> from parents, but no - they are still 0,0,0. I mean come on - when
> childs
> >> local coords are 0,0,0 it should be in the origin of it's parent,
> right!?
> >>
> >> There is a command "Make Parent without Inverse" that parents without
> the
> >> hidden offset, but it destroys the real offset - putting child in the
> >> center of parent and this is bad. There is also a command called Clear
> >> Origin, that does something similar (but not exactly and not always -
> and
> >> it is not clear to me what and why. It takes Alt O, Alt G, Alt O again
> to
> >> clear origin and coords completely in some situations).
> >>
> >> I can't see any benefit, reason or logic behind this. This makes things
> >> confusing and conflicts with the way other 3d apps work. And I can't
> find a
> >> simple solution (besides writing my own python script which I did), to
> get
> >> normal parenting behavior.
> >>
> >>
> >> best wishes,
> >> Gatis
> >> _______________________________________________
> >> Bf-funboard mailing list
> >> Bf-funboard at blender.org
> >> http://lists.blender.org/mailman/listinfo/bf-funboard
> >>
> >
> > Just a guess, but could this be yet another strangeness of the old
> > dependency graph that the devs are working hard to repair/rewrite??
> >
> >
>
> --
> Jeffrey "Italic_" Hoover
>
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