Get all MatIDs used on an object?

By Glen Schulz · 2008-01-22

Description

Is there a faster way to get all the material ID's used on an object rather than looking at every single face and doing a getFaceMatID on them?

i.e. - is there a property on the object/mesh node (similar to obj.material ) which is an array of all the ID's used on this object?

(note: the multi-sub materials may have sub-mats which are not used at all on this object, so I'm wanting to obtain the ones that actually used)

Thanks!
Glen Schulz

Comments (1)

denisT · 2008-02-22

There is no a mesh property which returns an array of material IDs. You have to look at every single face of the mesh. Something like this:

fn getMeshMatIds thenode = if iskindof thenode GeometryClass do
(
local themesh = thenode.mesh
local ids = #{}
for f=1 to themesh.numfaces do ids[getFaceMatID themesh f] = on
ids
)

the function returns a bittarray of all used mat ids