[Sidefx-houdini-list] Grouping by connectivity and/or position

Alvaro Castaneda varomix at gmail.com
Tue Jan 18 12:43:58 EST 2011


Thanks guys for the help, I did had the grouping/deleting by color done but
the key component I had missing was the connectivity SOP and the index it
generates, that's exactly what I need.

Thanks again


  *.:varomix:.*
MIX Studio
3D Artist/Generalist TD
www.varomix.net


On Tue, Jan 18, 2011 at 10:01 AM, Spencer Lueders <
Spencer.Lueders at framestore.com> wrote:

> just as Andrew said, but if you dont want the other red prims which are not
> touching you could do:
>
> delete SOP > By Expression > $CR > 0.9 && $CG < 0.05 && $CB < 0.05
> connectivity SOP
> group SOP > By Expression > $CR > 0.9 && $CG < 0.05 && $CB < 0.05 && $CLASS
> == 0
>
> class is generated by the connectivity sop and gives a unique value to each
> connected geo starting with "0".
>
> ----- Original Message -----
> From: "Andrew D Lyons" <tstexture at gmail.com>
> To: sidefx-houdini-list at sidefx.com
> Sent: Tuesday, 18 January, 2011 11:52:02 AM
> Subject: Re: [Sidefx-houdini-list] Grouping by connectivity and/or position
>
> I may be missing some complexity, but it sounds like:
>
> 1./ group geometry SOP
> 2./ group by expression:
> 3./ $CR > 0.9 && $CG < 0.05 && $CB < 0.05
>
> or the like...
>
> Cheers
>
> On 18 January 2011 00:08, Alvaro Castaneda <varomix at gmail.com> wrote:
> > Hi
> >
> > Is there a way to group primitives in a grid that are the same color of
> the
> > first left upper corner primitive, and that are also connected?
> >
> > maybe this can help make it clearer
> >
> > let's say I have a grid with 6 random colors, the left upper primitive
> (0)
> > has a color of red, and that is directly touching some other primitives
> also
> > colored red, how can I get, only those primitives into a group, and
> ignore
> > the rest of the unconnected red primitives in that grid?
> >
> > Thanks
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> >
>
>
>
> --
> =======================================
> Andrew D Lyons | Digital Artist | http://www.tstex.com
> =======================================
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>
> --
> Spencer Lueders
> Technical Director
> Framestore NY
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