Hi,

I have a geometry with a “mask” (0 or 1) attribute and I would like to reproduce the connectivity SOP behaviour looking up at this attribute instead of adding a blast node to delete the points with mask at 0.

Any idea how I could do this ?

Thanks,

Julien

i cant understand what you are trying to do. but if you want to delete points with mask 0 , you can connect a blast node and type @mask=0 without spaces in the group knob. or you can do this and lot more in attribute wrangle
if (@mask==0){
removepoints(0,@ptnum)
}

or if you wanna groups based your attribute take a look at partion sop

Hi,

No, this is not what I'm trying to do, or at least how I want to do it. I can do what I need with this :
- Blast the points with mask == 0
- use the connectivity sop to add attribute per connected primitives
- transfer attributes to the original model (the one without the blast)

What I'm wondering is if there is a way to the same without having to blast the points (which is expensive).

Hope this makes more sense.

Thanks,

Julien

if you are transferring back the attributes to the original mesh using an attribute transfer sop then the attribute will spread on your blasted points as well, so is that what you need ?
you could post a hip file which will be helpful to understand what you are trying to do and why.

you can use Primitive Split using mask attrib before Connectivity, instead of blast, should be a bit faster
or if you can define border edges between various mask attrib values as an edge group you can use it for Seam Group in connectivity node directly

Yes, the seam group works well !

Thanks,

Julien