Group (by Box) only whole Pieces of Fractured Object

[luthio1]

Hello,

I am still new to Houdini and got the following Problem to solve:

I got a fractured Object and want to use a Box to Group a specific area

of the fractured Object.

BUT I want to select only whole Pieces.

In other words:

If one or more Primitives with the Attribute NAME are in Box, assign

ALL Primitives with same Value of Attribute NAME to Group "X".

Example 1:

If Prim A (with Atb. NAME = "Piece5") is in Box, assign ALL Prim

with Atb. NAME == "Piece5" to Group "X".

Example 2:

If Prim B (With Atb. NAME = "Piece2") and Prim C (Atb. NAME = "Piece9") are

in Box, assign ALL Prim with Atb. NAME == "Piece2" OR NAME == "Piece9" to Group "X".

So in the end it should work for n Primitives in Box.

How can I achieve this?

Thanks in advance

Lukas

[tmdag]

One of many possibilities

groupBox.hipnc

Edited October 25, 2013 by tmdag

[luthio1]

thank you very much. nice method.

I now try to figure out a way of achieving the same result but by using color tools.

So i want to be able to use the "Color paint tool" and paint color automaticly on whole pieces.

[tmdag]

you could promote attribute to primitive (if object is one primitive) or to detail (if you iterate through each object separately) and then promote that attribute (Cd) back to points

[luthio1]

thanks again for your help.

i am only one step away from my goal.

now i only need to get the avagere color value of a group of primitives.

[Shinjipierre]

attribute promote again, it can compute the average