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Voronoi - dynamic - location based fracture (WIP)

#1 User is online   johner Icon

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Posted 19 May 2009 - 09:21 PM

So, I got tired of wrestling with the Shatter tool and watched a few Rayfire videos and decided it was time to have a go at a Voronoi-based fracture tool and some procedural fracturing for debris and whatnot. I'm just about done with the first pass, so I plan on releasing it here in a few days for testing, and eventually on the Exchange. My favorite feature: no Cookie SOP! (or volumes for that matter) It doesn't work for all types of geometry (damn torii), but it's reasonably robust at this point.

Anyway, since it's based on a decomposition of the space around user-supplied points, it's (relatively) straightforward to do dynamic, location-based fracturing. I finally wrestled DOPs into submission enough to post a few test playblasts:

First up, eight or so identical column/barbell looking things smashing together. All dynamic, location-based fracturing, fragments re-fracture again, etc:
here

Static object hitting falling box, brittle material:
here

Same scene, but the fragments inherit more velocity from the initial collision, looks like harder material:
here

Earlier test, this one pre-fractured, RBD Glue Object of Stanford armadillo, 459 pieces:
here

Same scene, but 200 iterations of "reattach" applied, which iteratively fuses random adjacent pieces back together again to try to avoid some of the "overwhelming convexity" that you get from a Voronoi space decomposition (this technique is very much a WIP):
here

Big, concave object as plain old RBD Fractured Object with about 1000 pieces:
here

Hopefully I'll have everything packaged up with examples within a week or so.

This post has been edited by johner: 19 May 2009 - 09:30 PM

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#2 User is offline   Owl Icon

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Posted 19 May 2009 - 09:42 PM

nice :) can`t wait to try it
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#3 User is offline   x-angel Icon

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Posted 19 May 2009 - 10:20 PM

Cool!!!
How do you realize the algorithm?
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#4 User is offline   CeeGee Icon

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Posted 19 May 2009 - 10:58 PM

Great work man, can't wait to try, i always break model in RayFire and bring in Houdini... But you tool is great...
DemoReel

My houdini test on Vimeo page
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#5 User is offline   dbukovec Icon

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Posted 20 May 2009 - 01:44 AM

it is, it is ... just awesome! :shocking:
regards,

daniel
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#6 User is offline   curveU Icon

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Posted 20 May 2009 - 05:32 AM

It's really nice. waiting for your final release.
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#7 User is offline   Mario Marengo Icon

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Posted 20 May 2009 - 05:40 AM

Nice work, Johner!
Looking forward to trying it out.
Mario.
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#8 User is offline   Netvudu Icon

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Posted 20 May 2009 - 05:42 AM

That rocks johner. Good job!
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#9 User is offline   michael Icon

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Posted 20 May 2009 - 07:38 AM

looks great john!
looking forward to seeing it...
Michael Goldfarb | Senior Character FX TD | Dr. D Studios
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#10 User is offline   kumpa Icon

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Posted 20 May 2009 - 07:42 AM

Very interesting, what renders this thing unable of fracturing torus ?
We render 'till we drop !
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#11 User is offline   junaid Icon

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Posted 20 May 2009 - 08:14 AM

haa..haa thats so cool :)
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#12 User is offline   MIguel Pérez Icon

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Posted 20 May 2009 - 08:48 AM

Looks awesome! I can't wait to try it!
<a href="http://www.miguelperezsenent.com" target="_blank">My webpage</a>
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