How can I get the outer border of a combined shape?

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I have a grid and a closed circle combined into a shape, and need to find their outer border.

I'm only a couple months in to learning Houdini, and I've spent the last couple of days trying different ideas, searching for tips, and looking for that "magic node that I haven't yet heard of" to solve this in a simple way, with no luck.

Any ideas?

Attachments:
combined-shape.png (11.7 KB)
outside-border.png (9.8 KB)
outline-shape.hiplc (151.4 KB)

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https://www.sidefx.com/forum/topic/73353/#post-310012 [www.sidefx.com]
Tomas Slancik
FX Supervisor
Method Studios, NY
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The example solution did get me closer. However, when one of the components of the Boolean is a grid, the method still doesn't clip away the borders that cross inside the grid.

I've enclosed a simplified version of the example you linked me to with a grid as one of the shapes to illustrate the problem.

Does the example only work for curves?
Edited by enjaysea - June 6, 2022 15:13:38

Attachments:
outer-borders.png (6.1 KB)
outer-borders.hiplc (132.9 KB)

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you have those small otl's and tricks on Odforce forum , i gonna try to find some and post letter

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cncverkstad
you have those small otl's and tricks on Odforce forum , i gonna try to find some and post letter

Nice! That did the trick. Thanks to you both.
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