group to attribute .. ( python code )

[zarti]

hi all ,

yesterday i was working with profiles of a window. i needed to Sweep and Skin them, while preserving the manually assigned group names to later apply materials .

at the beginning, the ForEach SOP wasn't giving me the results with For's Each Group option . Each Attribute Value has always been 'kind with me' . =)

after searching in forums i didn't found something or felt tired and .. i gave Python a try .

here there are those lines pasted :

# This code is called when instances of this SOP cook.
geo = hou.pwd().geometry()

# Add code to modify the contents of geo.

groups = geo.primGroups()
group_list = []

for group in groups :
    group_list.append( group.name() )

#print group_list

mat_attrib = geo.addAttrib( hou.attribType.Prim, "group", "")

for group_name in group_list:
    for primitive in geo.iterPrims():
        if geo.findPrimGroup( group_name ).contains( primitive ):
             primitive.setAttribValue( mat_attrib, group_name )

create a new operator type > python type > geometry operator and paste this in the Code tab.

the attribute name is 'hard coded' to "group", but you can easily create a string input parameter for it.

... and so , my manually named groups 'survived' passing through foreachs , sweeps and skins =)

hope this wd help someone else in other cases too ..

attached pics shows what i was doing ...

[anim]

what about this?

no Python needed

sweep_keep_groups.hip

[zarti]

what about this?

no Python needed

yes, it does the job too ( just tested in my hip ).

thanks for sharing it !

[hopbin9]

That looks cool. Nice rendering by the wall.

[zarti]

That looks cool. Nice rendering by the wall.

thanks !

beside the glass , all other shaders are colored irradiance vops , mixed with lambert ( 10-15% ), just to slightly catch the shadows of a single point light and 'naturally' shade the models .

i'm doing few short animated illustrations .