select tool's '3D Connectivity' in nodes

Forums Houdini Indie and Apprentice select tool's '3D Connectivity' in nodes

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anon_user_37409885: Member; 4189 posts; Joined: June 2012; Offline

May 24, 2017 1:17 a.m.

Does anyone know which nodes can be used to create the same thing as the select tool's ‘3D Connected Geometry’? Specifically after the Boolean node, the +3D creates some very nice islands.

thx!

Attachments:
Screen Shot 2017-05-24 at 5.11.15 PM.png (55.3 KB)


Doudini: Member; 333 posts; Joined: Oct. 2012; Offline

May 24, 2017 4:23 a.m.

I think you look for the connectivity SOP and partition SOP


anon_user_37409885: Member; 4189 posts; Joined: June 2012; Offline

May 24, 2017 9:44 p.m.

Very cool, thanks! Works!

Out of interest is there a better way to do this now we use attributes everywhere? i.e. loops etc. as it only works by ‘checking Local Variable’ in ConnectivitySOP. Seems old skool.


Doudini: Member; 333 posts; Joined: Oct. 2012; Offline

May 25, 2017 5:40 a.m.

The Connectivity sop should just outputs an attribute starting at 0. So there should be no need to turn on local variables? Or am I missing something?

Maybe you can post an example?


anon_user_37409885: Member; 4189 posts; Joined: June 2012; Offline

May 25, 2017 3:39 p.m.

Here we go, want to get the slices as groups but they only appear when the Local Var is switched on.

Attachments:
PartitionLocVar.gif (236.7 KB)
_ConnectPart.hiplc (62.3 KB)


Doudini: Member; 333 posts; Joined: Oct. 2012; Offline

May 26, 2017 5:34 p.m.

use partition SOP to partition the geo based on the class attribute with Rule:

group_`@class`


anon_user_37409885: Member; 4189 posts; Joined: June 2012; Offline

May 26, 2017 10:02 p.m.

thx! works perfectly


tamte: Member; 8525 posts; Joined: July 2007; Online

May 29, 2017 9:13 p.m.

also, no need to create groups, now that as you say we use attributes everywhere

Tomas Slancik
FX Supervisor
Method Studios, NY


anon_user_37409885: Member; 4189 posts; Joined: June 2012; Offline

May 29, 2017 10:32 p.m.

hey - do you mean we don't use the Group field anymore?

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