Forums Technical Discussion Stripping transform motion

Stripping transform motion

   2604   6   1
User Avatar
AndyW
Member
343 posts
Joined: Dec. 2014
Offline
 
I'd like to take out the transforms for motion I'm using to drive a Vellum sim, essentially I need the input transforms to drive the sim but I'd like to cache it out at the origin without the transforms, if that makes any sense. Any ideas?
 Report
User Avatar
benC
Member
52 posts
Joined: Feb. 2016
Offline
 
Where was the transform from, is it from a cache?
 Report
User Avatar
AndyW
Member
343 posts
Joined: Dec. 2014
Offline
 
Yes, I'm driving the vellum sim from cached FBX animation from Maya
 Report
User Avatar
benC
Member
52 posts
Joined: Feb. 2016
Offline
 
Probably can multiply the simulated geometry by the inverted transform matrix from source. If you share the file I can try that.
 Report
User Avatar
AndyW
Member
343 posts
Joined: Dec. 2014
Offline
 
Absolutely! I've stripped out the alembic file that was driving the motion and I'm just using a sphere for simplicity. I'm keeping the Rivet setup in case it affects how the matrices are built
 Report
User Avatar
AndyW
Member
343 posts
Joined: Dec. 2014
Offline
 
Not sure why I was having trouble attaching this file
Edited by AndyW - Jan. 31, 2020 11:57:20

Attachments:
vellum_xforms_1.hip (642.8 KB)

 Report
User Avatar
benC
Member
52 posts
Joined: Feb. 2016
Offline
 
I used the transform pieces node to invert the transformation. Plug first input from vellum output, second from source animated geometry, third from source geometry freeze at frame 1, then check the invert transformation option.

Attachments:
vellum_xforms_1_invert_transform.hip (1.5 MB)

 Report
  • Quick Links