RBD hitnum not working

[Sourabh]

Hi guys,

I just want to ask one quick question. I am using bullet solver and want to count hit value of pieces with collision geomectory. I tried pop collision detect also but its not working on rbd.

thanks

[fuat]

if you want to use it outside DOPs with an hscript expression, as far as i know the hitnum attribute has no Local Variable Mapping set by default. but maybe a scenefile clarifies things a bit?

[Sourabh]

Sorry i can't attach scene file.

I get hitnum attribute from pop collision detect in DOPs but it not changing value after collision. I want to use that attribute inside DOps in pop wrangle to stop small rbd pieces after couple of bounce. 

 

[Martin47]

you have the accumulate hits toogle turned on ?

here is a simple test with particles...

pop-collision-detection.hipnc

[Sourabh]

Thanks Martin for reply and giving me example file.

I am facing problem in rbd .Particle are working fine. In RBD hitnum attribute is not changing. It remain zero after collision.

[Martin47]

 ok... maybe the "RBD impacts" shelf tool is useful to record the impact sub data. give it a try

[dannyp95]

Did you ever solve this? I'm having the same issue trying to group rbd's in the dopnet after one collision. Works perfectly with particles but not rbd..

[luke@lukeconstable.com]

I can actually answer this, just had the same problem.  all you have to do is in pop collison detect node in your bullet solver, select  SOP , target your collider, and then make the 'default particle size' bigger than 0.  that was the the thing that was stopping results.