Alembic curves animation

 
 
 
Posted by:teddude75
Data created:24 October 2017

Hello, I'm trying to get a ponytail to follow a character. I've made some curves on a deforming mesh and exported them as an alembic. These curves are what I want for the guides, they follow the character and are in the shape that I need to maintain. Here's my question, if I do hair from curves than  I check "use guides faces" it should work like this video "Ornatrix 101: Hair placement control using guide faces"  https://www.youtube.com/watch?v=iZiDEOVavFg even though it's for 3DSMAX, but it doesn't seem to work. Basiclly, I want the hair to follow the guides pretty exact with very little interpolation. What do you guys think?

TED

Here's a screenshot


Attached Files:
Image 1

Hi Ted,

Sorry for the delay. The "use guides faces" option is designed to use the faces closest to each guide to generate the hair. Increasing the iterations should increase the amount of faces used. In your screen capture you are using GuidesAsHair as distribution type, this will create one hair for each guides. You should be using any other distribution type if you want more hairs.

Jeordanis Figuereo (Product Designer. EPHERE Inc.)

Another thing, for this option to work the guides should be grounded to a distribution mesh or scalp, Ornatrix needs a surface to distribute the hairs.

Jeordanis Figuereo (Product Designer. EPHERE Inc.)

Thanks for your time Jeordanis.

I tried plugging in the animated curves but grounding the curves breaks the animation. I know I've talked to you about this before and you told me to use ncloth to constrain the hair to the hair tie, This was to much simulation for very little movement. With ncloth and nhair the hairs would spring out of the hair tie and the character would move to fast for the simulation. So I rigged the hair tie with a dynamic joint follicle that follows the charater like a tail and has overlapping action. Then I sculpted geometry for the hair shape and then wrapped curves to the geometry and that all seems to work but not the Ornatrix part. If there is a bettter work flow out there let me know. But for now, I have animated curve (alembic file) that looks good but if I take the curves and make hair from curves I can't ground the strands or if I do the transfer hair thing ( import hair curves from the edit guides node)  the animation is broken. I'm already pushing my timeline back and I'm starting to effect the my production pipleine. Please Help! 

TED

I think in this case you have to turn OFF Set Positions and Set Rotations in GroundStrand node, this way the animated curves will be grounded without affecting the simulation. Please give it a try.

Jeordanis Figuereo (Product Designer. EPHERE Inc.)

Hi Jeordanis,

I tried setting set position off and set rotation and it didn't follow the mesh and when I set position is on the curve follow but it blows up at a turn. I know I'm getting close butr it's still not working. Is there another way to import animated curves?

TED


Attached Files:

>addingHair.mp4 (7225767 bytes), >app_without.mp4 (2458737 bytes),

Right, Set Positions should be ON. Maybe if I take a look into your scene I'll be able to find a solution for this. If possible, please send your scene to Jeordanis.f@ephere.com

Jeordanis Figuereo (Product Designer. EPHERE Inc.)

Thank you for the files, I'll take a look into the scene and get back to you as soon as I can.

Jeordanis Figuereo (Product Designer. EPHERE Inc.)

Hey Jeordanis,

I figure it out. KKosic tip me off. I was constraining the scalp to the rig and I needed to wrap deformer instead.

Thanks

TED

Oh that's great! Thank you for the follow up.

Jeordanis Figuereo (Product Designer. EPHERE Inc.)

Btw, sorry for the delay, has been a busy week. :)

Jeordanis Figuereo (Product Designer. EPHERE Inc.)