Jump to content

How to perfect fractured a sphere into tetrahedrons ?


jingyisw

Recommended Posts

On 9.7.2016 at 4:55 PM, Farmfield said:

And I have yet to dig deeper into how the extract transforms thingie works that Petz solved it with - I only come so far as to understand it's actually calculating a transform compared to something else. 

in the file i´ve posted i didn´t actually extract transformations from the thetrahedrons. it´s more about finding the rigid transformation between two geometrys in a least squares sense, or more precisely it´s the method described in this paper LINK.  what i ment by "extractTransform" was the existing object node in houdini which uses pretty much the same algorithm under the hood. it´s only available in the obj-context but fairly easy to bring into sops. anyway, both method are used in the uploaded file.

hth.

petz

Edited by petz
Link to comment
Share on other sites

Yeah, I managed to figure that out - I think the term is pretty misleading, it really is an alignment more than anything else.

Now, still haven't figured out how it's set up - and why. It's about coordinate space, I'm guessing, using the subnets. Need to dig into that more but I've been stuck with other stuff. :P

 

Link to comment
Share on other sites

  • 1 month later...
On 7/5/2016 at 6:50 AM, f1480187 said:

 

@Butachan, intrinsics access from Expression functions available from 515 build:


prim("../sphere1", 0, "intrinsic:measuredperimeter", 0)

 

Just anted to confirm indeed everything worked fine after I updated! thanks.

...Upps didn't realize the thread had progressed a lot after I checked the file...hehehehe. This solutions are pretty cool by the way.

Edited by Butachan
Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...