Help with pivot aligning tools plz!

[ThE_JacO]

An implicit is what the name says, an implicitly defined object.
It doesn't have geometry that can be altered around the center, it's simply a formula that takes a transformation, a couple parameters, and draws around that transform.

You can't affect the centre of an implicit without the implicit following. It's not an issue with the pivot tools, you're simply using the wrong type of primitive :)

[eldee]

make a curve instead of an implicit. one of the beauty things of XSI is that anything can be a bone or controller, nulls, implicits, curves, you name it.. it makes for some very cool possibilities.

Like it's been said- you cant change the center of an implicit (without it moving also), nor a null- but a curve you can.

[ThE_JacO]

You can change the transformations of something, without its representation moving, only if that object is explicitly defined, which boils down to it needing points with coordinates.
Meshes, surface, curves, lattice all will do, because moving a center basically means transforming the object and transforming all its geometry by the opposite at the same time.

Something like a null or an implicit or a volume deformer are defined by a rule, not by an explicit set of data, and that rule takes into account a transform, and eventually some parameters, hence by logic you can't change one without changing the whole :)

Very zen, I know.

[toonafish]

So, by that zen logic. Why can we translate the pivot to a different place, just like we can with any explicit object, but we just can't rotate it ?

[ThE_JacO]

If I select center and manipulate the center, the implicit moves and rotates with it, so I don't know of the difference you're talking about tbh.

[toonafish]

nono, not the center, the pivot.

With the Alt key I can move the pivot, but I can't rotate it.

I can adjust the orientation of the rotation gizmo only in the kinematics panels pivot rotation settings, but the transform and scale gizmo won't be affected by the rotation of the pivot.

[ThE_JacO]

No XSI in front of me, but off the top of my head:
Changing the translation of the pivot simply means offsetting it by a displacement, the scaling
and rotation of it however affects the 3x3 transform matrix, which is probably locked off being affected.

As far as I know though that holds true for all pivots, including geometry's. The pivot is supposed to be placeable anywhere in space, that just changes the manipulation, but you can't rotate it or scale it, else that would introduce one more matrix in the chain and would need to temporarily become another parent, or a neutral pose and not just drawing the pivot somewhere else. That holds true for anything in XSI last time I tried.

[Black_Fox]

Thanks a lot guys! :D

Yah, after all it was just the fact the implicit object wont allow changing its center.

I felt like an idiot finding this after 2 hours v___v

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