[Sidefx-houdini-list] whitewater_sim writing the wrong frames

Gary Jaeger gary at corestudio.com
Fri Aug 4 17:13:45 EDT 2017


Got it. Super helpful, thanks

Gary Jaeger / 650.728.7957 direct / 415.518.1419 mobile
http://corestudio.com <http://corestudio.com/>

> On Aug 4, 2017, at 2:06 PM, Gregory Ecker <gregory.ecker at gmail.com> wrote:
> 
> correct.  Then use the checkpoints as a backup if you really care about
> the sim (ie. it's gonna go for a while, it will really suck if it crashes
> etc).  On the dopnet,  use the checkpoint trail length and checkpoint
> interval parameters to reduce the number of .sim files you are writing to
> disk.  For instance if you set 'Checkpoint Trail length' to 5,  and
> checkpoint interval to 10,  then a .sim file will be written out every 10
> frames,  and only the last 5 will be saved (houdini will clean up the older
> ones).  One thing to look out for here is that you need to clean up these
> files yourself if you are rerunning the sim,  and you need to make sure the
> directory exists where you are writing out the checkpoint file.
> 
> -G
> 
> On Fri, Aug 4, 2017 at 4:54 PM, Gary Jaeger <gary at corestudio.com> wrote:
> 
>> So what I think you’re suggesting its that, instead of writing out the
>> .sim files, you simply cache the import_whitewater and then load that in
>> from disk. So caching out the import_whitewater removes the need to
>> explicitly write out the .sim files, right?
>> 
>> Gary Jaeger / 650.728.7957 direct / 415.518.1419 mobile
>> http://corestudio.com <http://corestudio.com/>
>> 
>>> On Aug 4, 2017, at 1:03 PM, Gary Jaeger <gary at corestudio.com> wrote:
>>> 
>>> Thanks. In this case they are somewhat light (not a ton of whitewater)
>> but I assumed they needed to be written out so that frames could be
>> rendered in arbitrary order (i.e. on a farm), but we’re still learning
>> houdini flip workflows so it’s probably off to watch the master classes for
>> the 4th time :)
>>> 
>>> Gary Jaeger / 650.728.7957 direct / 415.518.1419 mobile
>>> http://corestudio.com <http://corestudio.com/>
>>> 
>>>> On Aug 4, 2017, at 12:55 PM, Gregory Ecker <gregory.ecker at gmail.com
>> <mailto:gregory.ecker at gmail.com>> wrote:
>>>> 
>>>> well,  within the dopnet using $SF makes sense.  Are you writing out all
>>>> of the .sim files ?  Those tend to be very heavy and I would only write
>>>> them out using the checkpoints method (unless there is another very
>>>> specific reason to do it).  You don't need them in general unless
>> something
>>>> goes very wrong and you need to restart the sim at a later point.
>>>> 
>>>> -G
>>>> 
>>>> 
>>>> On Fri, Aug 4, 2017 at 3:48 PM, Gary Jaeger <gary at corestudio.com
>> <mailto:gary at corestudio.com>> wrote:
>>>> 
>>>>> Ah, I see what you mean. By default the output file name has .$SF.sim
>> in
>>>>> the name. Changing that to $F starts the writing at .900. I wonder why
>> that
>>>>> is?
>>>>> 
>>>>> Gary Jaeger / 650.728.7957 direct / 415.518.1419 mobile
>>>>> http://corestudio.com <http://corestudio.com/> <http://corestudio.com/
>> <http://corestudio.com/>>
>>>>> 
>>>>>> On Aug 4, 2017, at 11:58 AM, Gregory Ecker <gregory.ecker at gmail.com
>> <mailto:gregory.ecker at gmail.com>>
>>>>> wrote:
>>>>>> 
>>>>>> hard to say without looking at it.  Are you using or referencing $SF
>>>>>> somewhere instead of $F
>>>>> 
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