int usd_isactive(<stage>stage, string primpath)
This function checks whether the given primitive is active.
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".
The path to the primitive.
1 if the primitive is active, and 0 otherwise.
// Check if the sphere primitive is active. int is_active = usd_isactive(0, "/geometry/sphere");