[Sidefx-houdini-list] transfer attributes from metaballs to geometry?

Andrew D Lyons tstexture at gmail.com
Thu Dec 4 12:54:22 EST 2008


OK,

Maybe get rid of metaballs and use their centre points with attrib transfer.

If you transfer Cd, and Alpha as a radius/weight - then attribTransfer
"Blend Width" should give you what you are after.

Cheers

2008/12/4 Robert Kelly <isstuff at gmail.com>:
> when you tick colours it shows the transform in a colour, probably good for
> doing the difference between the deformed un deformed geometry in the
> previous trick to find metta weight, but it isnt about transfeing Cd
> atributes.
>
> 2008/12/4 Andrew D Lyons <tstexture at gmail.com>
>
>> Oh - I see what you are doing. The magnet SOP is what you want (as
>> Brian Goodwin suggested). That does colors. Is it not working?
>>
>>
>> 2008/12/4 Robert Kelly <isstuff at gmail.com>:
>> > hmm attribute transfer only listens to the  attribute and the location of
>> > the center of the metaball, not the weight of the metaball. to test it
>> you
>> > make a big strong red metaball and suround it with 4 small weak blue ones
>> > and see what colour the grid listens to. rangi's trick that works on one
>> > atribute is to get a magnet sop and move the geometry in the Y and mesure
>> > the difrence between each points position and that will give you the
>> > strength of the metaball at each points location. But this dosent get you
>> > the colour.
>> >
>> >  Andrew D Lyons methoud works to an extent (the closest to it ) but not
>> at
>> > the heart of the metaball
>> >
>> > I think i will have look into a vex related answer. Unless there is some
>> > more surgestions?
>> >
>> > Robert
>> >
>> > 2008/12/4 Andrew D Lyons <tstexture at gmail.com>
>> >
>> >> Hi,
>> >>
>> >> 1 convert-meta
>> >> 2 attribute transfer SOP.
>> >>
>> >> Cheers
>> >>
>> >> 2008/12/4 Robert Kelly <isstuff at gmail.com>:
>> >> > Am I missing something or is ther a simple way to... for example.
>> >> >
>> >> > You have a grid, some metaballs of different sizes and weights, each
>> with
>> >> a
>> >> > different color in the Cd attribute. the mettaballs are intersecting
>> the
>> >> > grid. How can i transfer the Cd attribute onto the grid and have it
>> >> transfer
>> >> > as you would expect.
>> >> >
>> >> > Or do I need to get into writing a vex sop to do this?
>> >> >
>> >> > Robert.
>> >> > _______________________________________________
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>> >> >
>> >>
>> >>
>> >>
>> >> --
>> >> =======================================
>> >> Andrew D Lyons | Digital Artist | http://www.tstex.com
>> >> =======================================
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>>
>>
>> --
>> =======================================
>> Andrew D Lyons | Digital Artist | http://www.tstex.com
>> =======================================
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Andrew D Lyons | Digital Artist | http://www.tstex.com
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