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+--- Thread: problem when using multiple VDB events (/thread-2186.html)
problem when using multiple VDB events - Geoff - 01-31-2021
Hey Tyson!
Hope you're doing well,
I still have this bug when using multiple events http://forum.tyflow.com/thread-1892.html
I use the empty birth VDB event workaround though...
But the main problem I want to point at now is the evaluation order, I don't understand how it works with VDB events.
it may be the same as standard events but It seems a bit odd with vdbs, or maybe I'm missing something...
For simple additions it's fine, but for more complex operations, with several intersections and substractions, it can be a reel pain...
For instance I'd like to patch a flow like this:
that behave like this:
Here's how some of my flows look like if I want a substraction to be evaluated in the right order
this file should illustrate the issue:
vdb_eval_order.max (Size: 972 KB / Downloads: 186)
RE: problem when using multiple VDB events - tyFlow - 02-01-2021
Quote:I still have this bug when using multiple events
Oh, weird...I thought I fixed that one.
As for your event ordering...events are evaluated breadth-first, top to bottom. So yea...things can get tricky when you need them to evaluate in a different order due to where/when you're sending data between events.
I'll add a setting in the next build so that you can offset evaluation for any event, not merely birth events. Maybe also an "evaluation order display" or something so no guesswork is involved when specifying order values.
RE: problem when using multiple VDB events - tyFlow - 02-01-2021
Also, I tried loading the file in the other thread you linked and couldn't get it to crash. Do you have a set of steps to take to get the crashing to occur?
RE: problem when using multiple VDB events - Geoff - 02-01-2021
That'd be a very handy addition!
I thought it was something different than breadth-first, but that make sens.
I didn't want to ask for a new feature but maybe you could consider adding a breadth-first/depth-first switch option in the flows main settings as well...
Anyway, thank you for the quick feedback.
As for the bug, this file crashes for sure (the flow is disabled) the particle to sdf op seems to be involved...
vdb_crash.max (Size: 900 KB / Downloads: 196)
RE: problem when using multiple VDB events - tyFlow - 02-02-2021
Hmmm...try as I might, I can't make either file crash. I enable the flow, refresh it countless times...no crash. The VDB is initialized properly and I can see the particle mesh.
Could you send me the minidump from your crash?
RE: problem when using multiple VDB events - Geoff - 02-03-2021
Hey Tyson,
You're right, the problem occurs only on my computer at home
I've send you the log and dump files...
Thanks for your time and efforts!
RE: problem when using multiple VDB events - tyFlow - 02-04-2021
Did you forget to attach?
RE: problem when using multiple VDB events - Geoff - 02-04-2021
no I've send you an email on the support mailbox, you didn't receive it?
here they are
vdb_crash_log_dmp.rar (Size: 764.6 KB / Downloads: 189)
RE: problem when using multiple VDB events - tyFlow - 02-04-2021
Nope...nothing in my inbox, but thanks for attaching here. I'll check it out when I get the chance.
RE: problem when using multiple VDB events - tyFlow - 02-09-2021
So I think I may have actually tracked this one down. Hopefully it's fixed in the next build (v0.16108)...let me know if you run into it again.
RE: problem when using multiple VDB events - Geoff - 02-09-2021
That's good news, you rock!