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RBDs - Collisions with lots passive moving pieces, most efficient way ? 6 years, 3 months

Rafael Santos

If all the rocks have similar LOD, I'd say your best bet is to create an RBD Glue object and set it's "create active object" toggle to off. That'll give you one SDF per rock but each one will have the max detail level you specify in the collision volume page, rather than the bounding box of the merged rocks. Now if you have rocks with different LOD you might want to create sets base on their LOD and create different RBD Glue objects so you can set the collision volume resolution according to the LOD of the different sets of rocks. Ultimately if every single rock is a different beast, you have no choice rather than creating different RBD static objects... :P I did once have an issue with creating one single SDF for complex groups of geometry where it created pockets of concavity and the collision detection failed in those cases... But that was a long time ago... in this very galaxy... Cheers Rafael Santos rafaels at gmail.com [416] 897-2841 Toronto - ON > > Hi, > > I have to make little rocks collide with quite a bunch of keyframed > geos (around 100). (translating/rotating objects, not deforming) > What you would say is the way to go for this : > > - Generate one SDF per object, apply to these SDF the key framed > animation and use that in DOPs for collision with the proxy volume on > the collisions/volume tab . > But this means 100+ hundreds different static objects in DOPs > > - Generate one huge SDF (takes quite some time with a sufficient > resolution to get proper detail) per frame and having just one static > object in DOPs, again using the proxy volume. > > Sadly I don't really have time to make proper performance tests right now. > > Thanks a lot for tips and pointers, > Vincent > > > ------------------------------ > > _______________________________________________ > Sidefx-houdini-list mailing list > Sidefx-houdini-list at sidefx.com > https://lists.sidefx.com:443/mailman/listinfo/sidefx-houdini-list > > > End of Sidefx-houdini-list Digest, Vol 330, Issue 2 > ***************************************************

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RBDs - Collisions with lots passive moving pieces, most efficient way ? 6 years, 3 months

Vincent Houzé

Hi, I have to make little rocks collide with quite a bunch of keyframed geos (around 100). (translating/rotating objects, not deforming) What you would say is the way to go for this : - Generate one SDF per object, apply to these SDF the key framed animation and use that in DOPs for collision with the proxy volume on the collisions/volume tab . But this means 100+ hundreds different static objects in DOPs - Generate one huge SDF (takes quite some time with a sufficient resolution to get proper detail) per frame and having just one static object in DOPs, again using the proxy volume. Sadly I don't really have time to make proper performance tests right now. Thanks a lot for tips and pointers, Vincent

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HDA python 6 years, 3 months

vvvv jaihind

Hi I create a script in python module of the event handler section. my scene: I have a otl with only operator list parameter with the name List and a button with name OK my script: # this script evaluates the operator list and stores the name of the node the user chooses def lquery(): list=hou.parm('/obj/OK/List').eval() lis=list.split(' ') ll=[' '] for each in lis: nodeiterate=hou.node(each) now in the scene: the user select obj/pointlight1 obj/spotlight1 the output will be a list pointlight1,spotlight1] All these are in the HDA Now if i click the OK Button it has to again print the list. How can this be done.It would be really great if someone can help me out. Thank you

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3 participants
2 comments

Link one ramp parameter to another 6 years, 3 months

Emanuele Berti

Hi Pablo, If you disable "Forbid Linking Parameters from outside this subnet" from the small gear inside the "edit parameter interface" you should be able to connect them without that message... and what it will do is just fill the path to that node inside "Default Points" parameter in the same way Rafael suggested. If you want to control more than one ramp, from the same Master ramp, you can put more paths in there separated by an empty space, as I did to solve my problem. Cheers, Emanuele Today's Topics: > > 1. Re: Link one ramp parameter to another (Pablo Gim?nez) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Mon, 5 Dec 2011 11:11:36 +0000 > From: Pablo Gim?nez <pablogipi at gmail.com> > Subject: Re: [Sidefx-houdini-list] Link one ramp parameter to another > To: sidefx-houdini-list at sidefx.com > Message-ID: > <CAKt3gg+FCZqErmC=Do0E23D410-0n=zsZXLggw7+t8XOUpzwMQ at mail.gmail.com > > > Content-Type: text/plain; charset=ISO-8859-1 > > Sorry for the late response. > Busy last week. > Well I tried it and is working. > It is great Rafael, really goor tip I have been wondering how to do this > for a long time. > Thanks mate! > > Thanks also Emanuele for your tip. One think I dont understand is what you > mean by "dragging 'n' ". > I tried to drag a ramp to the Edit Paramater Interface of another node and > I got an error, about the parameter is out of the scope of the node. > > 2011/11/30 Rafael Santos <rafaels at gmail.com> > > > I see, what I do is, from the node where the source ramp is, go into > > the edit parameter interface and select the ramp parameter. There's a > > line that reads "Default Points", in the second field of this line you > > can type the address to the ramp parameter you want to control and hit > > "Accept". > > It worked fine for me... :) > > > > Cheers > > _______________________________________________ > > Sidefx-houdini-list mailing list > > Sidefx-houdini-list at sidefx.com > > https://lists.sidefx.com:443/mailman/listinfo/sidefx-houdini-list > > > > > > -- > Un saludo > Best Regards > Pablo Gim?nez > >

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7 participants
11 comments

non gui acees to new operator type 6 years, 3 months

Dan Schneider

Im looking for away to run command similar to those in the File ->? New Operator Type menu. In particular, Vex builder but others would be useful in the future as well. It seems when I look in the xml for the menu it runs the id h.newotl which is from the hotkey file "h" Any idea where the actual script that get ran lives and if its accessable? Are these just commandline flags to vcc ? -- It would seem likely, but I have been unable to get a combination the produces and empty vop in an OTL like New Operator Type -> VexBuilder... any leads on how to do this or find the code that gets ran to look at would be great. Thanks ahead for your thoughts. (|;-D>

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Add Sop 6 years, 3 months

Alex Czetwertynski

Hello I'm putting together a short Node based tutorial series and am currently preparing one on the Add SOP. I am wondering if anybody on this list has some interesting tidbits of information about this SOP, maybe some unusual uses for it, or times when it helped do something it was not necessarily designed for? Thanks Alex

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10 participants
14 comments

HOW: Random Point Color For instances 6 years, 3 months

Alvaro Castaneda

Hi I can't seem to find how to do this I just want to vary the CD attribute at each instance I'm just instancing geo into a bunch of point and want them to be slightly different color. Cheers!!

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4 participants
5 comments

SideFX seeking Senior In-House TD for R&D work 6 years, 3 months

Robert Magee

Side Effects is looking for a Senior (VERY Senior) In-House TD to assist with Houdini R&D in the Toronto office - http://bit.ly/yjt4vG Robert ---- Robert Magee Product Marketing Manager Side Effects Software Inc. www.sidefx.com 416 504-9876 x327

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Minimum fields needed for a smoke or Pyro sim 6 years, 3 months

Pablo Giménez

Hi all. Playing around with fluid sims in H11, I spotted the possibility of desable the creation of some fields when the sims inits. Both solvers needs all fields. I mean you always need Pressure? Or if you are doing a smoke sim, does the solver need Burn or Fuel? Also I guess that the ifference betwwne dynamic fields and masks, is the dynamics are advected by the velocity fields at the end of the sim step? (Masks onthe other hand are never advected) Am I all right? For masks, these the info used by relationships, so I guess that if I dont have, let's say, any Pump relationship in my sim, I dont need the Pump and Pump Index masks. Is this all right? I am trying to reduce the footprint of sims as most as possible and just thought this could be in help. Thanks. -- Un saludo Best Regards Pablo Gim?nez

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6 participants
11 comments

OT: Houdini 12 system 6 years, 3 months

jim＠rutherfordfx.com

Thanks for all the info...interesting how those gtx cards are benchmarking higher than the quadra 4000 ... Is it worth it to spend the money on a quadra...I,m not working with huge data Jim -------- Original Message -------- Subject: Re: [Sidefx-houdini-list] OT: Houdini 12 system From: "Craig Hoffman" <craigleehoffman at aol.com> Date: Wed, January 04, 2012 7:50 pm To: <sidefx-houdini-list at sidefx.com> On a cheaper note, I was going to build my own "bang for the buck" system, but stumbled upon this pre-built PC, which had pretty much all the stuff I wanted for a price lower than I could build it for (I missed it at $899 on "Black Monday", and it is at $1099 now): http://www.newegg.com/Product/Product.aspx?Item=N82E16883227382&Tpk=ibuypowe r%20957i 2600K Core i7 (supposed to be good for easy overclocking) 16 GB RAM 2 GB GTX 560 Ti 1 TB Hard Drive Windows 7 Premium 64 bit I haven't pulled the plug and bought it yet- I am still hoping for it to pop up on some "New Year Sale" or something, but if someone wants a pretty rockin' PC for home and only has around $1K to spend, I don't think this one can be beat. Cheers, Craig -----Original Message----- > > On Wed, Jan 4, 2012 at 7:25 PM, Peter Bowmar <pbowmar at gmail.com> wrote: > > > We have z800 machines here, they are good! > > > > If you want to use GPU, it's all about the RAM on the card, so the > > 580 with 3GB is a good cost-effective choice. > > > > I recommend 16gb as minimum RAM and the most you can afford as max > > :) > > > > On 4 January 2012 09:58, zoran arizanovic > > <zoran.arizanovic at gmail.com> > > wrote: > > > Hi > > > I bought hp z800 in summer and am thrilled with it highly > > > recommended > > > http://h18000.www1.hp.com/products/quickspecs/13278_na/13278_na.pd > > > f > > > Zoran > > > > > > On Wed, Jan 4, 2012 at 6:50 PM, <jim at rutherfordfx.com> wrote: > > > > > >> Hey > > >> Any suggestions in regard to an optimum system in the $2000 to > > >> $4000 range that would make the best use of Houdini > > >> 12....obviously GPU I've seen other posts talking about Intel I7 > > >> 980 6 core with 16 gigs > and > > >> up of Ram...lots of people talking about geforce 580 3 gig > > >> graphics card...looking to probably run linux. > > >> thanks > > >> Jim > > >> > > >> -------- Original Message -------- > > >> Subject: [Sidefx-houdini-list] OT: Houdini 12 system > > >> From: <jim at rutherfordfx.com> > > >> Date: Wed, January 04, 2012 10:49 am > > >> To: sidefx-houdini-list at sidefx.com > > >> > > >> > > >> _______________________________________________ > > >> Sidefx-houdini-list mailing list > > >> Sidefx-houdini-list at sidefx.com > > >> https://lists.sidefx.com:443/mailman/listinfo/sidefx-houdini-list > > >> > > >> _______________________________________________ > > >> Sidefx-houdini-list mailing list > > >> Sidefx-houdini-list at sidefx.com > > >> https://lists.sidefx.com:443/mailman/listinfo/sidefx-houdini-list > > >> > > > > > > > > > > > > -- > > > Zoran Arizanovic > > > vfx reel : http://vimeo.com/28605448 > > > http://www.imdb.com/name/nm2902303/ > > > _______________________________________________ > > > Sidefx-houdini-list mailing list > > > Sidefx-houdini-list at sidefx.com > > > https://lists.sidefx.com:443/mailman/listinfo/sidefx-houdini-list > > > > > > > > -- > > Cheers, > > > > Peter B > > > > --No, I am not on Facebook. > > _______________________________________________ > > Sidefx-houdini-list mailing list > > Sidefx-houdini-list at sidefx.com > > https://lists.sidefx.com:443/mailman/listinfo/sidefx-houdini-list > > > > > > -- > Zoran Arizanovic > vfx reel : http://vimeo.com/28605448 > http://www.imdb.com/name/nm2902303/ > _______________________________________________ > Sidefx-houdini-list mailing list > Sidefx-houdini-list at sidefx.com > https://lists.sidefx.com:443/mailman/listinfo/sidefx-houdini-list > -- ======================================= Andrew D Lyons | Digital Artist | http://www.tstex.com ======================================= _______________________________________________ Sidefx-houdini-list mailing list Sidefx-houdini-list at sidefx.com https://lists.sidefx.com:443/mailman/listinfo/sidefx-houdini-list _______________________________________________ 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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4 participants
3 comments

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sidefx-houdini-list January 2012