[Bf-animsys] Pole angle and IK constraints ...

[Brecht Van Lommel]

An IK constraint works on a chain of bones, controlling the overall
direction of a chain does not have a single obvious solution, so
there's user control over it. There does not seem to be a good reason
to remove user control here and break rigs, even if almost no one
needs to set it manually.

I do think it would be good to set the pole angle automatically
instead of the user having to tweak it manually before it's usable. I
just didn't get to implementing that at the time, setting it manually
only takes a couple of seconds so it wasn't a priority.



On Fri, Jan 24, 2014 at 11:42 AM, Gaia <gaia.clary at machinimatrix.org> wrote:
> Hi;
>
> We can define a Pole Target and a Pole Angle when we add an IK constraint to
> a bone. However i believe that the pole angle is actually defined as
> follows:
>
> "the pole angle is the angle between the bone's local x axis and the
> connection line between the pole target and the bone"
>
> If this is true, then we can calculate the pole angle. here is an unfinished
> python example for how it could be done (probably it can be done better):
>
> http://www.pasteall.org/48987
>
> So am i correct ? If not can you please give me a reason and an example for
> a situation where i WANT to set the pole angle manually ?
>
> cheers,
> Gaia
>
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