[Sidefx-houdini-list] Bacteria growth

Gerbrand Nel g at cannonballbunny.com
Thu Mar 24 10:06:46 EDT 2016


So I'm still pretty stuck and the deadline is nearing :(
If anyone is bored.. could you please take a look, and help my dumb-ass out?

https://www.sidefx.com/index.php?option=com_forum&Itemid=172&page=viewtopic&t=43711&sid=3c7dd618c229f9104723eee3f4261aa6

Thanks
g


On 22/03/2016 19:52, Gerbrand Nel wrote:
> I’ve tried something new now:
> I create a popnet inside a geo node where I create my germs.
> Here I can stamp the age from the points generate in the popnet, to 
> drive the animation of my germs.
> Then I put an assemble and rest node down.
> I then create a new Autodop with a bullet ridget body sim, and set it 
> to create active deforming objects.
> This seems to almost work.
> I get the first germ, and it is animating fine.
> If I set the creation frame to something like 25, I get a few germs on 
> frame 25, and their animation is working right.
> If I set the creation frame to $F i just get a duplicate of the object 
> at each frame.
> How do I set it up to create the packed RDBs as I create them in the 
> popnet?
> I hope this makes sense... its hard to explain without being able to 
> post a scene here
> G
> On 22/03/2016 19:08, François Duchesneau wrote:
>> You probably want to use bullet packed primivite sim instead of the 
>> old fashion rbd. And if this is the case then you can simply create 
>> an attribute initialized to 0 on the first frame and then age it 
>> every frame inside a sop solver.
>>
>> Francois
>>
>> On 03/22/2016 12:59 PM, Zoran Arizanovic wrote:
>>> yes it is a bit schematic
>>> maybe if this is initial state for FEM and then do the organic wiggly
>>> collision in DOPs
>>> good luck
>>>
>>>
>>> Zoran Arizanovic
>>> LinkedIn <http://www.linkedin.com/pub/zoran-arizanovic/4/177/295>
>>>
>>>
>>> On Tue, Mar 22, 2016 at 5:56 PM, Gerbrand Nel 
>>> <g at cannonballbunny.com> wrote:
>>>
>>>> Hi Zoran
>>>> Thanks for the link. There are some things in there I could use, 
>>>> but it
>>>> doesn't look like his "germs" are properly colliding, and pushing each
>>>> other outwards.
>>>> My client is unfortunately very specific about that part of the brief.
>>>> I need to figure out how to get animation driven by age on a RDB.
>>>> The idea is to grow each germ until it is ready to divide, Then 
>>>> find a 2/3
>>>> position along the length of that germ, and spawn a new one, a 1/3 
>>>> of the
>>>> originals length. At the same time I would pop the original germ 
>>>> back to
>>>> 2/3 its size.
>>>> The collision combined with the division of germs is what pushes 
>>>> them out
>>>> to spread.
>>>> G
>>>>
>>>> On 22/03/2016 18:22, Zoran Arizanovic wrote:
>>>>
>>>>> check this out
>>>>> https://www.youtube.com/watch?v=yXHZoZItwag
>>>>>
>>>>> I know its russian language but it is doable i dont know russian , 
>>>>> just a
>>>>> bit of houdini and could finish it
>>>>> hope this helps
>>>>>
>>>>>
>>>>> Zoran Arizanovic
>>>>> LinkedIn <http://www.linkedin.com/pub/zoran-arizanovic/4/177/295>
>>>>>
>>>>>
>>>>>
>>>>> On Tue, Mar 22, 2016 at 1:30 PM, Gerbrand Nel <g at cannonballbunny.com>
>>>>> wrote:
>>>>>
>>>>> Hi guys
>>>>>> I have to create a system to visualize Bacterial growth.
>>>>>> Kinda like this, but we will need to be allot closer, so I cant 
>>>>>> cheat
>>>>>> much.
>>>>>>
>>>>>> https://www.youtube.com/watch?v=gEwzDydciWc
>>>>>>
>>>>>> My initial idea was to use a RBD solver to get the spawning 
>>>>>> objects to
>>>>>> interact with each other.
>>>>>> At he the bottom of this thread, there is a good starting point.
>>>>>>
>>>>>>
>>>>>>
>>>>>> http://www.sidefx.com/index.php?option=com_forum&Itemid=172&page=viewtopic&t=31855 
>>>>>>
>>>>>>
>>>>>> I would like to these shapes to grow over their age, but I have 
>>>>>> no idea
>>>>>> how to create an age attribute on a RDB, or how I would even wire 
>>>>>> that
>>>>>> up.
>>>>>> Any ideas would be welcome :)
>>>>>> Thanks
>>>>>> G
>>>>>>
>>>>>>
>>>>>>
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