vertexattrib

<type> vertexattrib(<geometry>geometry, string attribute_name, int linear_vertex_index, int &success)

<type>[] vertexattrib(<geometry>geometry, string attribute_name, int linear_vertex_index, int &success)

Unlike vertex, this function does not have a version that takes a primitive number and primitive vertex number. If you have a primitive number and primitive vertex number, you can convert them into a linear index using vertexindex.

<geometry>

When running in the context of a node (such as a wrangle SOP), this argument can be an integer representing the input number (starting at 0) to read the geometry from.

Alternatively, the argument can be a string specifying a geometry file (for example, a .bgeo) to read from. When running inside Houdini, this can be an op:/path/to/sop reference.

attribute_name

The name of the attribute (or intrinsic) to read.

linear_vertex_index

A linear index into the list of all vertices. If you have a primitive number and primitive vertex number, you can convert them into a linear index using vertexindex.

success

The function overwrites this variable with 1 if the attribute exists and was read successfully, or 0 otherwise.

Returns

The value of the given attribute on the given point number.