"seperate poly" function missing in XSI

[pomme]

How do I seperate a polygon object?

All 3d packages I've used has a "combine/seperate" function. 2 poly objects which don't touch can become one object, then you can seperate them at a later time.

It's incredibly useful when importing files that have merged the layers.

XSI must have this function right?

-pomme-

[ob1]

you can use the polygon detach script in the net view.
Select the polys you want to detach and then click on the script.

There is also a polygon break script that allows you to break your mesh into individual polys if you need too.

[gutz]

You can use: Create>Poly.Mesh>Extract from Polygons

Lepo

[pomme]

Oh sorry, I don't think I was being clear, what I need is a function that will know in advance which parts need to be detached, like an object made of many parts that were "joined" (not boolean unioned) so that you select them all as one, then later seperate them, with the tool knowing in advance which parts are to be seperated.

thanks anyways for your responses

-pomme-

[vmpre]

I dont know if this will help, but...

Select a single polygon of the merged object you want to detach.

Then hit shift - + key

This will grow your selection until it has reached the object limits. If you have more then one seperate object that you merged, the grow selection will only grow as far as there are connected parts.

From there you can use the cut poly script to detach them.

Does this help?

Vmpre

[pomme]

Yes it worked! thanks man,

but one more newbie problem:

I delete the original object, and then my newly extracted object dissapears with it, what gives?

This happens when I do booleans also, I delete the old objects and the newly formed ones are deleted also.

-pomme-

[jerry-hnk]

you have to freeze it first and then delete the original object. I wrote a script to do this poly seperate thing, its on the script section at highend.

[atyss]

This is because you didn't freeze the new object. XSI keeps a relationship between every new object created and the object used to create it (like in duplications, booleans, merges....). So if you delete the original object the new one gets "uncreated".

The only way to break the relationship is to select the new object and hit Freeze (in the bottom of the MCP).

The utility of this relation, in case you wonder, is that if you make modifications to the original, these modifications will be carried to the new object. This is extremely useful, especially when the new object has lots of points.

Hope this helps
Salutations - Cheers
Bernard Lebel

[pomme]

hehe, just read the first pages of the modelling book (the freeze thing must have been the ultimate newbie question).

-pomme-

[marksch]

in case you also didnt know...

get a poly sphere,
create-->polymesh-->subdivision,
move the new object somewhere else
select a poly on the low res and move it
select a poly on the high res and move it

neato!

hit the + key on the number pad on the low res too.

mark