Houdini reorients vector attribs when deforming geometry

[bloomendale]

HI.

Is there any way to control at sop level if Houdini transforms all vector attributes or only P and N?

I mean if i create box, add my own vector attrib "blahblah" == 1,0,0 and then add transform sop (or any other deforming sop) and rotate along some axis i get my attrib transformed. What is the logic behind this behavior?

Is it bug or what?)

i understand when it transforms attribs such as P and N, but not all of them. And why do we need Attribute Reorient SOP then (it does exactly the same)?

I can use Add Attribute VOP. It has different modifiers where some of them prevent from transforming attrib. but i think changing (or adding checkbox etc) to AttribCreate SOP would be better.

thanks in advance.

[sanostol]

Houdini only rotates vectors, postitions and normals, just specify the attribute as float with size of 3 and type None or Color and it will not be transformed

And the attribReorient is great if You just have a alembic cache

Edited May 17, 2013 by sanostol

[bloomendale]

makes sense. thanks again)

[Juraj]

Houdini only rotates vectors, postitions and normals, just specify the attribute as float with size of 3 and type None or Color and it will not be transformed

And the attribReorient is great if You just have a alembic cache

 

Hi,

is it possible to specify attribute type to be Normal or Color in VEX?

When I create attribute like this v@abc, then abc is not transformed by Transform SOP.

[anim]

setattribtypeinfo()

https://www.sidefx.com/docs/houdini14.0/vex/functions/setattribtypeinfo