Houdini 20.0 Nodes VOP nodes

Unique Value Count of Attribute VOP node

Since 12.5

Returns number of unique values of an integer or string attribute.


The op:/ syntax can be used to refer to a SOP operator rather than a file on disk.



What type of attribute data to fetch.

Geometry File

The file on disk to fetch an attribute from.

Attribute Class

Attributes can be stored on points, vertices, primitives, or even as global attributes (Detail). The class refers to where to look for it. It will adjust the meaning of Point or Primitive and Vertex.


The name of the attribute to fetch. id fetches the common id attribute, and name will fetch the name.

VOP nodes