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will.97

Clustering wood fractures

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Hi guys, for one of my projects I'm fracturing and simulating an entire house. Most of the work is almost done though I'm having a issue, When having a collision on my wood frame, every single piece/splinter fly off (Which makes sense, theres nothing to glue multiple pieces together to break as bigger chunks) Is there a way to glue/cluster pieces into bigger chunks to make the sim more realistic as it breaks apart? I could do this perfectly with normal fractures such as the outer layer but the wood with this type of geo I seem to keep having issues, I tried using "RBD Cluster" and "Glue cluster" with not much luck. wondering if anything had any idea on how to achieve this? 

Thanks in advance!

Capture.png

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I think RBD Cluster does exactly what you're looking for - what did you try (and what didn't work?)

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You splinters look waaaaaaaaay too long.

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47 minutes ago, kleer001 said:

You splinters look waaaaaaaaay too long.

Ive changed that since, my bad lol

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1 hour ago, cwhite said:

I think RBD Cluster does exactly what you're looking for - what did you try (and what didn't work?)

With the RBD clusters, I cant seem to find a values that give me a good result (I'm sure its just my lack of knowledge and probably missing something dead obvious)

all the help is appreciated!

 

Screenshot 2019-04-16 at 23.29.20 copy.jpg

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Please post hip files for maximum helps.

B)

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5 minutes ago, kleer001 said:

Please post hip files for maximum helps.

B)

My bad, Its quite a big project so ive just sent over the hip, everything should just be in the "fracture" geo :) 

House_fracture_wood_cluster.hipnc

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Your piece names aren't unique - each iteration of the for loop is producing pieces with the same names. If you drop an Extract Centroid SOP down, you'll see what the RBD Cluster SOP is working with (and why you get odd clusters)

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34 minutes ago, cwhite said:

Your piece names aren't unique - each iteration of the for loop is producing pieces with the same names. If you drop an Extract Centroid SOP down, you'll see what the RBD Cluster SOP is working with (and why you get odd clusters)

Ah right, I think I see what you mean. Sorry silly question but where should I name the pieces? In which node sorry?

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You can do it in Voronoi Fracture by varying the Name Prefix based on the current iteration number.

A more general approach that works well for multiple levels of fracturing is to set up names on the input pieces (for unfractured pieces, use e.g. the Assemble SOP), then change the Name Attribute parameter on Voronoi Fracture to Append and set the Name Prefix to whatever separator you want (e.g. "_"). This will name the sub-pieces by appending to the parent piece's name.

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