Polygon Attribute per face

[brunobowden]

Dear All,

is there a way to add an attribute for an individual face on a polygon model? Or a global attribute that stores an attribute for all faces on a model? The MEL command would be something like this if it did work:

addAttr -ln "test" -at double pSphere.f[100]

The reason for it, is for tagging double-sided faces on a game model. We don't want to have to duplicate all materials with a single and double sided version. A simple boolean attribute would be enough.

[warpcat]

Last I was told, you couldn't add attrs to components, only to nodes. Sounds like a job for blind data to me.

[jeffd]

We usually deal with this sort of situation using selection sets. For instance you could have a set named "two_sided" that contained all the faces.

--JeffD

[brunobowden]

Dear Warpcat,

thanks for the info, it did exactly what I needed, though I'll look into selection sets also. For everyone else, here's a quick example of using it on a cube. The blindData is also intelligent enough to copy values to newly created faces, e.g. in a face split.

create a blindDataType
blindDataType -id 9001 -dt "boolean" -ldn "doubleSided" -sdn "ds";

assign blindData to poly at particular faces
polyBlindData -id 9001 -at "face" -ldn "doubleSided" -bd 0 pCube1.f[1:3]

read back information
polyQueryBlindData -id 9001 -ldn "doubleSided" pCube1.f[2];