DjangoBB LoFi version

Full Version: Setting "Input Prims" in Python

Root » Solaris and Karma » Setting "Input Prims" in Python

OmerShapira

2020年1月9日 14:00:06

When modifying a LOP prim in python, I'd like to be able to communicate that change to other nodes downstream, so they can use `lopinputprim('.', 0)`as their input.

Python nodes don't auto-detect changes in “input prims”.

Here's an example:

from pxr import Sdf
node = hou.pwd()
stage = node.editableStage()

prim_path = node.inputPrims(0)[0]
prim = stage.GetPrimAtPath(prim_path)
prim.CreateAttribute("primvars:__TEST", Sdf.ValueTypeNames.Int, True, Sdf.VariabilityUniform).Set(42)

a node querying the input prim downstream will have no indication it's there.

(houdini 18.0.287)

rafal

2020年1月10日 10:19:16

You mean something like hou.pwd().setLastModifiedPrims()?

OmerShapira

2020年1月11日 20:45:06

yup, definitely that

Thanks!