How to fix geometry with more vertices than points.

[csp]

Hi,

 

I am woking on an geometry imported from another application, I think Modo. For some reason the number of vertices are MUCH higher than the number of points which makes the geometry heavy. I am wondering if is it possible inside Houdini to delete all the unused vertices.

 

Thanks in advance,

Christos 

[eetu]

How much higher? A closed quad mesh by definition has four times the vertices it has points. (Plonk down a default torus, it has 100 points and 400 vertices.)

[danw]

Yeah, I don't think you can delete or create vertices explicitly.  You implicitly get 1 vertex for every polygon primitive that shares a point.

If you convert polygons to a polysoup primitive, it will remove *all* vertices, as a polysoup by definition assumes all vertices at a point to share common information, and so just stores that information on the point itself (so it will always have smooth shading, as you can't harden the normals)

 

If you don't need unique vertex information, polysoup is a much lighter way to store and manipulate geometry.  Just be careful what you use it for... some nodes don't play very nicely with them - for example, I've found using Delete to remove points from a polysoup takes an insane amount of time, as I presume it rebuilds the entire polysoup primitive after every individual point deletion.