[Sidefx-houdini-list] Time warping a point cloud

Ben Schrijvers ben.schrijvers at guerrilla-games.com
Wed Aug 6 04:30:02 EDT 2008


And for the time warping... uhm... maybe use an animation curve instead 
of $T  :-)

Ben Schrijvers wrote:
> Hi there,
>
>  I just gave that a go and you just need to set the geometry CHOP's 
> start and end paramers to $T.
> In that way it just reads the current frame.
>
> With time slicing and things like lag, jiggle etc you can only play 
> forward so I geuss you bring back the channels into sops and render out 
> a point cloud sequence again.
>
> cheers,
> benS
>
>
> Guillaume Laforge wrote:
>   
>> Hellooooww Ben :),
>>
>> The timeslicing option sounds interesting but I can't find a way to activate this parameter directly in the geometry CHOP.
>> It is possible to turn it on in the lag CHOP but the memory could be full before this node :-/.
>> I'm at home know, so I can't test on my point cloud sequence. I will let you know how it works tomorrow.
>>
>> Thanks.
>>
>> Guillaume
>>
>>
>> On Tue, 05 Aug 2008 20:01:16 +0200, Ben Schrijvers <ben.schrijvers at guerrilla-games.com> wrote:
>>   
>>     
>>> Bonjourrr...
>>>
>>> For the time warping part you indeed are better of with a sop method.
>>> For CHOP's tou might consider looking at timeslicing. Each CHOp has a
>>> toggle in the last tab.
>>> Not sure if it's documented somewhere but I believe it means it's just
>>> keeping a few frames in memory.
>>> Not all CHOP's will work but things like lag, jiggle or spring will.
>>>
>>> cheers,
>>> benS
>>>
>>> Guillaume Laforge wrote:
>>>     
>>>       
>>>> Hi,
>>>>
>>>> I'm trying to do some time warping on a bgeo sequence  of points coming
>>>> from a fluid simulation. I thought that I could use CHOPs to control the
>>>> motion but
>>>> unfortunately when I reference my bgeo file in a geometry CHOP, it gives
>>>> an error or crash Houdini. I've got 7000 points in my bgeo files and a
>>>> duration of 120 frames. Maybe it is to much data to handle in CHOP ?
>>>> I tried the Timewarp SOP too but it gives less control than CHOPs (no
>>>> lag, jiggle etc...).
>>>>
>>>> Any advices to setup a time warping on a bgeo sequence of 7000 points on
>>>> 120 frames is welcome !
>>>>
>>>> Thanks
>>>>
>>>> Guillaume Laforge | la maison
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>>>>       
>>>>         
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>> --
>> Guillaume Laforge | la maison
>>
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>>   
>>     
>
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