usd_primvarindices

Since	18.0

int [] usd_primvarindices(<stage>stage, string primpath, string name)

int [] usd_primvarindices(<stage>stage, string primpath, string name, float timecode)

This function returns the index array of an indexed primvar found directly on the given primitive.

<stage>

When running in the context of a node (such as a wrangle LOP), this argument can be an integer representing the input number (starting at 0) to read the stage from. The integer is equivalent to the string form referencing a particular input, e.g., “opinput:0”.

You can also use this argument to refer to a USD file (e.g., “/path/to/file.usd”), or to another LOP node’s cooked stage using the op: as the path prefix (e.g., “op:/stage/lop_node”).

primpath

The path to the primitive.

name

Primvar name (without namespace).

timecode

The USD time code at which to evaluate the attribute. A USD time code roughly corresponds to a frame in Houdini. If not given, the time code corresponding to the current frame is used.

Returns

The index array of an indexed primvar, or zero/empty value if the primvar does not exist or is not indexed. Use usd_isprimvar if you want to check whether the primvar exists and usd_isindexedprimvar to check whether it is indexed.

Examples

examples

// Get the index array of an indexed primvar.
int indices[] = usd_primvarindices(0, "/geo/cube", "indexed_primvar_name");