hi
i did this in xsi, i create a script that did:
for each edge i compare the neighbor polygon normal, and how big the angle between those 2 vector if the angle is less than my specified treshold value the edge will be deleted.

now how can i do it in houdini, does anyone knows?
is it posible to do it via vop? (does anyone knoe how can i do iteration on edge or polygon in vop,it seem that it only works with vertex ?no?)
or via sop is it possible?

thx patar

While actually doing this in Houdini yourself is not easy without using the HDK (the Houdini Development Kit), you can get a similar effect using the PolyReduce SOP with “Preserve Original Points” and a high value in “Edge Stiffness”. Try that out and see if it helps you get what you want.

Cheers,
Jason

Also, take a look at the “Edges” option in the parameters for the Group Sop.
(UnEnable Number, Select Edges, then Enable it, then enable Edge Angle)

It adds prim's to the group if the angle between 2 surfaces along an edge
is above a certain threshold. Once you make a group you can do things to it…
Not quite what you want, but it might help.

cheers,
b.

BTW, I think these same options are directly on the Delete SOP as well.

Stuff like this should perhaps be added to the dissolve sop?

Here's one way to do what you want, but it relies on the fact that the polys are nicely ordered. Might give you some ideas though.