Refracture On Collision?

[Atom]

HI All,

 

I have an object with large fracture parts that fall on to a ground plane.

How do I make them break into smaller chunks once they hit the RDB ground plane? (or any collision object)

 

Thanks

[Farmfield]

There's a couple of ways of doing this but the basic method is using the fracture parameters node in DOPs, that's what you get set up automagically when you use the "make breakable" shelf tool on a RBD object.

 

Though this is one of the areas in Houdini where I miss Thinking Particles, the methodology built into that workflow is just amazing for doing recursive setups - you basically shuffle stuff between groups and set rules for that group, so something in a group can fracture, then you can shuffle the fragments into another group or have part of it go back into the fracture group, etc. and it's just such a brilliant workflow for doing stuff like refracturing. Here's an example out done by Allan McKay...

 

 

And here's Allan talking about the shot, setups, lookdev, etc...