Jump to content

Fuse edge to generate center line


Recommended Posts

Hi guys,

does anyone know if in Houdini is an option to fuse points in poly extrude to generate center line as I show in the gif below? Or how could we generate a center line in such a geometry?

I need to do it to generate neon light in the center of the letter.






Link to comment
Share on other sites


The problem is called Straight Skeleton. It is a well studied comptl geo problem. There is a robust implementation in CGAL, but it's most likely not an acceptable answer.

It's a hard problem that you can't just solve with a few chained SOPs sadly.

The closest you will have in Houdini is this: do a polyexpand SOP with those parameters: Output: Offset Surfaces

Offset: some large number greater that the dimensions of your object.

After that, finding the actual straight skeleton is not trivial either, because it is not a curve, but a tree. It does not exist as an object in Houdini.

You can have a look at the vertex attribute EdgeDist, in some cases it may help to delete some points to help you build the skeleton.


Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...