Hi,

I was wondering how I would go about creating a primvar using python inside of Solaris?

I hope someone can help!

Best,
Rich

primitive.CreateAttribute(attributeName, Sdf.ValueTypeNames.<type>)

Types I found on the nVidia website: https://developer.nvidia.com/usd/tutorials [developer.nvidia.com]

also helpful: https://graphics.pixar.com/usd/release/api/class_usd_prim.html#a935381d7c7100b583fdcdb0e10dae9e6 [graphics.pixar.com]

Hey,

Thanks this seems to work great for creatiing an attribute but unfortunately it isn't a primvar so i cannot reference it in a shader


I do need to be able to create a Primvar so any more info in regard to this would be useful

for anyone interested you just need to add 'primvars:'+ to the front and then set the custom to false with 0 at the end

example.

Actually, there is a whole dedicated API for authoring primvars with python:
https://graphics.pixar.com/usd/release/api/class_usd_geom_primvars_a_p_i.html [graphics.pixar.com]

So something like (I didn't actually test this):

The advantage is that you don't need to know all the precise details of how primvars are expressed. You also get a python API for setting the interpolation metadata, using indexed primvars, etc. All of which is equivalent to building the attributes and setting the metadata yourself, but less error prone.