| Since | 18.0 |
int usd_primvarlen(<stage>stage, string primpath, string name)
int usd_primvarlen(<stage>stage, string primpath, string name, float timecode)
This function returns the length of a given primvar found directly on the given primitive.
For array primvars it is the length of an array, and for non-array primvars the length is 1.
<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 length of the array primvar, or 1 if the primvar is not an array, or 0 if the primvar does not exist. Use usd_isarrayprimvar to check if the primvar is an array.
Examples ¶
// Get the array length of the primvar on cube. int array_length = usd_primvarlen(0, "/geo/cube", "array_primvar_name");
| See also | |
| usd | |
| usd_primvar |
|