Couple of questions before buying Ornatrix License

 
 
 
Posted by:birdiesama
Data created:26 August 2017
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Hi Bird,


"The first problem I noticed is that the order of the curve I selected to convert into ornatrix guide and the order of curve generated from 'Curves From Strands Node' is different. Meaning I cannot apply the animation from ornatrix simulation back to client's guide curve even if the number of span is the same."

This is to be expected. CurvesFromStrand will generate a different set of curves with the animation on it, the animation will be applied to the Ox generated curves, not the source curves, this is how it works. In my first two messages I explained the workflow to exported the curves and animation generated by Ox, I didn't described a way to import the animation into the source curves, sorry If I confused you there. I expect that you where going to use the resultant Ox animated curves with the same amount of points for the final results. 

About the Dynamics node. Is very difficult to advice you if I cannot look into the scene. Now that I think about it, the GroundStrands node is only needed if you are going to generate hair from those guides, which you are not going to do, you don't need it. This node affect the rotation of the guides, better don't use it on this case. Another cause of the issue can be something in the PushAwayFromSurface node, but is difficult to say without looking into the scece. To make the simulation a little bit more stable at the roots try playing with the Holder Particle Position parameter. This will move the initial particle at the roots, maybe this can help. 

I'll see if Marsel can give you more information and details about Moov.

Jeordanis Figuereo (Product Designer. EPHERE Inc.)

That's a very grave miscommunication, this is from my very first post:

The client will send me a guide curves for hair/fur to to simulate. I have to simulate those curves and send them back as alembic cache and these curves must not be modified (as in different number of cv, span, name, hierarchy, etc. ).

Partly my fault for not trying this in the demo since it is the very last step of the pipeline and I took your words as Ornatrix can do what I expected it to do. Still it is a very important factor I decided to purchase the license. Now I can't think of anyway to use Ornatrix in our pipeline.

Will Ornatrix consider making resultant OX animated curves to be the same hierarchy as the source curve in future implementation? Now I will have Ornatrix licensing just sitting there unable to do anything.

Hi again,

I'm sorry to hear that. This is why I've attached a test scene so you can try for yourself and maybe dessolve any possible confusion: "I'm attaching a sample scene ready for you to test. Let me know if that helps."

I'll past your request to Marsel, he is traveling at the moment but maybe we can do something about it. 

Jeordanis Figuereo (Product Designer. EPHERE Inc.)

Thanks Jeordanis.

From what I understand the order of the curves coming in to GuidesFromCurves should be preserved and remain the same when using CurvesFromGuides operator? This should be doable, perhaps we can also add an option to re-arrange this order in the GuidesFromCurves list. Would this solve the problem?

Marsel Khadiyev (Software Developer, EPHERE Inc.)

Hi Marsel,

That would be awesome! If you could add an option to 'sort by name' in GuidesFromCurves it should solve the problem.

Thank you.

Hi Bird,

Would it be possible to send me a sample scene containing a hierarchy of curves as you describe them? I want to make sure we're implementing something which would align with that requirement.

Marsel Khadiyev (Software Developer, EPHERE Inc.)

Btw, you can already test our new dynamics node "Moov Physics" in the latest nigthly build.

Jeordanis Figuereo (Product Designer. EPHERE Inc.)

Hello Marsel,

Here you go :


https://drive.google.com/file/d/0B9acOuH0SmXseXVDVTFFckROOTg/view?usp=sharing

Hello Jeordanis,

Thanks, I will try it as soon as I have time. Very excited :D

Hi Birdiesama,

I just found out this thread is still open and would be good to give you an update. With the current Ornatrix version you can just export your hair forom Houdini or any other package as alembic, important it in Ornatrix, simulate it and export the alembic back to Houdini. I hope this helps. 

Jeordanis Figuereo (Product Designer. EPHERE Inc.)

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