@ attributes

[jacob clark]

I've noticed in the voronoi SOP there are several nodes that group geometry in the group field using something strange.

It appears that the group field can access primitive attributes with the syntax

@orient==1

Does anyone have any more info on this? Seems like a powerful trick!

I would love to use it for point attributes as well, but they don't seem to work?

cheers,

-j

[anim]

yes, even help knows something about this

http://www.sidefx.com/docs/houdini11.0/model/groups

(at the bottom "@attribute op value: Selects the points/primitives where attribute matches value, based on .... ")

to be able to use it in group field of some nodes you need to specify type of the group, it can't be set to "Guess From Group"

so just change type to Points

Edited November 23, 2010 by anim

[jacob clark]

Well spotted anim!

I've managed to get this working with Primitive Types, but seem to be missing something in the Point category. I have attached a file showing my issue.

Seems to work with a Color SOP, but not a Delete?

cheers,

-j

AttributeTest_v1.hip

[anim]

use Blast SOP instead, it works

or use By Expression Mode in Delete SOP and type $TEST<.5 as an expression

[jacob clark]

I am trying to stay away from variable mappings for this one. Blast seems to be the way forward!

cheers,

-j