| Since | 18.0 |
int usd_primvarsize(<stage>stage, string primpath, string name)
This function returns the tuple size of a primvar found directly on the given primitive. If the primvar is an array, it returns the tuple size of the array element. E.g., for vector types, this is the number of components.
<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).
Returns
The tuple size of the primvar.
-
For a vector type, this is the number of components.
-
For an integer, float, or string, this returns
1. -
For an array primvar, this returns the tuple size of the elements.
If the primvar does not exist, returns 0.
Use usd_primvarlen if you want to obtain the array primvar length.
Examples ¶
// Get the tuple size of a primvar on the cube primitive. int tuple_size = usd_primvarsize(0, "/geo/cube", "primvar_name");
| See also | |
| usd | |
| usd_primvar |
|