| Since | 19.0 |
string usd_iprimvarinterpolation(<stage>stage, string primpath, string name)
This function returns the interpolation style of the primvar found directly on the given primitive or inherited from primitive’s ancestor. E.g. “constant”, “varying”, etc.
<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 primvar’s interpolation. The standard interpolation styles are:
-
“constant” - same value over the entire surface (i.e., detail)
-
“uniform” - one value for each uv patch or a face (i.e., primitive)
-
“vertex” - values interpolated between each vertex using surface’s basis function (i.e., point)
-
“varying” - four values interpolated over uv patch or a face (i.e., vertex)
-
“faceVarying” - for polygons and subdivision surfaces, four values are interpolated over each face of the mesh (i.e., vertext)
Examples ¶
// Get the interpolation style of the primvar on the cube or its parent. string interpolation = usd_iprimvarinterpolation(0, "/geo/cube", "primvar_name");
| See also | |
| usd | |
| usd_primvar |
|