how to get the profile of a section cutting through geometry

oat · Houdini Expert Joined: 24 Dec 2009 Posts: 386

shown below, I do like to get the profile of the section cutting through 3 overlapping boxes.

May I ask how to do this?

I can use the cookie node to get the shape of the section cutting through the boxes, but it is composed of 3 separate polygons and I can't find a way to merge them into one shape ...

thanks in advance!

oat · Houdini Expert Joined: 24 Dec 2009 Posts: 386

I'm not sure if there's a sound solution to what I intend to do here.

Anyway, can I suggest the Houdini development team to consider this function as a new tool or an option added to the slice node?

- Ji

pinkwerks · Talkative Joined: 05 Jan 2007 Posts: 48

Cookie working fine here.

oat · Houdini Expert Joined: 24 Dec 2009 Posts: 386

Hi, pinkwerks, thanks!

I understand that cookie and clip nodes work fine here. My intention is to isolate the profile shape of the section automatically without manually picking all the edges constituting the profile.

- J

pinkwerks · Talkative Joined: 05 Jan 2007 Posts: 48

Oh sorry, was confused by your pictures. You can do this easy.

Add a fuse sop to the end of the chain.

Then use a divide sop with 'remove shared edges'.

Or perhaps, group geometry sop, set 'entity' to 'edges' and on the edges tab - check unshared edges. Be sure to uncheck 'enable' on the Number tab.

oat · Houdini Expert Joined: 24 Dec 2009 Posts: 386

thank you very much, pinkwerks! learn a new trick!

... the only pity is that we need to use multiple cookie nodes, two geometry at a time, to union all the separate parts to make this work...

a "master" geometry as a result of merging all the individual geometry doesn't respond to the method you suggested.

- J