[Sidefx-houdini-list] Calculating Velocity after CreepPOP?

Sean Lewkiw seanl at rainmaker.com
Thu May 10 10:11:43 EDT 2007


Actually, Wagner does it again. 

Pete Wallace wrote:
>  
>  
> Lewkiw does it again...
>  
>  
> cheers,
> Pete
>  
>  Pete Wallacepies4peter at hotmail.commob. 07759 039 167
>
>
>
>   
>> Date: Thu, 10 May 2007 13:59:31 +0000> From: seanl at rainmaker.com> To: sidefx-houdini-list at sidefx.com> Subject: Re: [Sidefx-houdini-list] Calculating Velocity after CreepPOP?> > I found an example of how to do this from Jeff, from way back in 2001, > and it still opens in H 8.2. > > Basically, create an attribute POP last in your chain, vector type, name > "txp", $TX, $TY, $TZ> Then, up the chain, a vel pop, with "vector3($TX-$TXPX, $TY-$TXPY, > $TZ-$TXPZ)" as expression, apply only to a group that includes only the > "crept" particles.> > I couldn't get it to work in component mode, which is where I was going > wrong. > > I think it would be much simpler if SESI would just make the creep POP > calculate velocity.> > Sean> > > Pete Wallace wrote:> > > > > > Lordy,> > Does anyone have a cunning way to get V after a CreepPOP has done it's thing?> > I'm changing pstate to release the particles from the geometry,> > but of course i get a dramatic change in Velocity when they are freed, as the CreepPOP > > doesn't add a meaningful v.> > > > Some preliminary messing around with trying to store the previous frame's P> > hasn't worked :-/> > > > Pete_______________________________________________> > Sidefx-houdini-list mailing list> > Sidefx-houdini-list at sidefx.com> > https://lists.sidefx.com:443/mailman/listinfo/sidefx-houdini-list> > > > -- > Sean Lewkiw> --> Rainmaker Digital> 130 Shaftesbury Avenue> London W1D 5EU> --> +44 (0) 207.031.1138 (P) (Direct)> +44 (0) 207.031.4302 (F)> +44 (0) 795.606.7245 (M)> > > _______________________________________________> Sidefx-houdini-list mailing list> Sidefx-houdini-list at sidefx.com> https://lists.sidefx.com:443/mailman/listinfo/sidefx-houdini-list_______________________________________________
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-- 
Sean Lewkiw
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Rainmaker Digital
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