[Sidefx-houdini-list] colour volumes by particles

Gerbrand Nel g at cannonballbunny.com
Tue Jan 23 02:51:57 EST 2018


Thanks guys!!
You are both winners in my book
Do you know how I would render this through redshift though?
It doesn’t seem to have a place to hook Cd in.
I'm also not entirely sure if I'm doing it right. would any of you mind 
taking a look at my tree?
Thanks
Gerbrand
On 2018/01/22 16:29, Ron Schab wrote:
> Lol, ok, let's call it a tie ?!?
>
> Ron Schab
> -----------------------------------------------------------------------
>
> http://www.ronthedon.com
>
>
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> On 22 January 2018 at 15:23, François Duchesneau <houdini at trinix.ca> wrote:
>
>> That's why I answer with half the answer, too make sure I'm the first ;P
>>
>> However, I had answered back by mistake to his personal email instead of
>> the list and he asked me clarification on how to create those fields, so
>> I'd say you beat me :)
>>
>>
>> On 01/22/2018 09:19 AM, Ron Schab wrote:
>>
>>> D'ooh ... Francoise beat me to it
>>>
>>>
>>> Ron Schab
>>> -----------------------------------------------------------------------
>>>
>>> http://www.ronthedon.com
>>>
>>>
>>> US: +1 951-5527104 # 290
>>> CA: +1 778-7830782 #176
>>>          +1 6047101797 (mob)
>>> GER: +49 892-1094212 #772
>>>          +49 (0)1577 - 4096084 (mob)
>>> UK: +44 (0)7511 295510 (mob)
>>> AUS: +61 (0)449 136336 (mob)
>>> NZ: +64 (0)21 0754 597 (mob)
>>> Malaysia:+60 133969400 (mob)
>>>
>>> On 22 January 2018 at 15:19, Ron Schab <ron.schab at gmail.com> wrote:
>>>
>>> Hey Gerbrand,
>>>> sounds like you are almost there.
>>>> Instead of using three volume vops (which of course run through the pc
>>>> open three times) u can do it all in one V-Vop.
>>>>
>>>> Before the Vop you will need to create three volumes named Cd.x, Cd.y and
>>>> Cd.z (you could do that with three NameSOPs, that you merge back in with
>>>> your initial density volume).
>>>> Then in ur VolumeVOP use ur PCOpen and PCFilter as it sounds like you
>>>> have
>>>> already set it up and bind export that to CD.
>>>> Then you just call that in your volume shader (most - if not all - of the
>>>> volume shaders that ship with Houdini are set up to do so already)
>>>>
>>>> hope that makes sense?
>>>>
>>>> cheers
>>>> Ron
>>>>
>>>>
>>>>
>>>> Ron Schab
>>>> -----------------------------------------------------------------------
>>>>
>>>> http://www.ronthedon.com
>>>>
>>>>
>>>> US: +1 951-5527104 <(951)%20552-7104> # 290
>>>> CA: +1 778-7830782 #176 <(778)%20783-0782>
>>>>          +1 6047101797 <(604)%20710-1797> (mob)
>>>> GER: +49 892-1094212 #772 <+49%2089%2021094212>
>>>>          +49 (0)1577 - 4096084 <+49%201577%204096084> (mob)
>>>> UK: +44 (0)7511 295510 <+44%207511%20295510> (mob)
>>>> AUS: +61 (0)449 136336 <+61%20449%20136%20336> (mob)
>>>> NZ: +64 (0)21 0754 597 (mob)
>>>> Malaysia:+60 133969400 <+60%2013-396%209400> (mob)
>>>>
>>>>
>>>> On 22 January 2018 at 14:54, Gerbrand Nel <g at cannonballbunny.com> wrote:
>>>>
>>>> Hey guys
>>>>> For some reason I find this much harder than I think it should be.
>>>>> I would like to colour a volume based on the colour of the points inside
>>>>> the volume.
>>>>> In my head I should just run this through a attribute transfer, and
>>>>> maybe
>>>>> a attribute blur.
>>>>> This however only works in my head... -_-
>>>>>
>>>>> I made a setup that kinda works, but it's slow as hell.
>>>>> In this setup I create 3 volume vops. in each one I use a pcopen to read
>>>>> my colors on the points, and multiply the R, G and B with the density of
>>>>> the volume.
>>>>> I now sit with 3 volume that I put a red, green and blue shader on.
>>>>> Like I said, this works, but its slow, and wrong and bad and I'm ashamed
>>>>> :)
>>>>>
>>>>> How to in real life?
>>>>> Thanks guys
>>>>> Gerbrand
>>>>>
>>>>> ---
>>>>> This email has been checked for viruses by AVG.
>>>>> http://www.avg.com
>>>>>
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