Hi folks,

Imagine i have some extruded text or some other complicated polygon.

Which node(s) could i use to remove all the surfaces and leave only the edges?

And to go further, say i then want to remove the edges and leave only the points, how to do i do that?

Or I guess to put it another way, how do i take a polygon and turn it into a wireframe?

Sorry, beginners stuff i now, but you gotta start somewhere!

dunno if this is what you want…it's something.

Er, dude, that's exactly what i want!

A million thanks!

A question, if you don't mind.

I notice that after the dissolve node i have zero primitives left over.

But those points seem to be a real thing. If i render, i get a nice “Hello World” made of little points, which have now become spheres.

So those points are a real thing, but not a primitive?

How do i change the size of those points (spheres)……so they change in size at render time?

Points can belong to a primitive but don't have to. Vertices which are references to points belong to and define polygon primitives. Don't worry, I'm still getting my head around it.

Create a Point Wrangle under your points and type “@pscale=.01;” without quotes. The .01 is the size.

Edited to add: I'm hesitant to put this up but it's something I put together a couple of weeks ago to try to clear up the relationship between points, vertices and primitives in my own head. Maybe it'll help:

Houdini Points, Vertices and Primitives [www.jerryhat.com]

Thanks Jerry, i found your tutorial useful!