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Poser - OFFICIAL F.A.Q (Last Updated: 2024 Sep 16 7:48 pm)
Hmmm... Dynamic chains would be interesting to see. Perhaps a dynamic chains/ropes system. Don't know if it would be easy though, and I kind of doubt you could "piggyback" it onto dynamic cloth. The physics involved is too different (soft body dynamics for cloth vs. rigid bodies with many collisions to detect for chains.) Seems like it would need its own "engine" along the lines of the dynamic cloth or dynamic hair engines that was dedicated to this type of simulation. - Jimdoria ~@>@
This was discussed on another forum, but not put into practice as far as I know. It was supposed that you might be able to apply transparency and displacement maps to a long thin strip of "cloth", and simulate that; but it wouldn't be good for big links since they'd be visibly deformed. Might be usable for fine, jewellery type chains though. The Poser Physics add-on might be able to do this.
Attached Link: http://forum.daz3d.com/viewtopic.php?t=31921
This may be the thread EnglishBob was refering to (or perhaps not, as Little Dragon does have a working example).It MIGHT be possible to do a similar thing for chains (I've been toying with the idea myself, but havn't got round to it yet..)
A thin strip of cloth (made totally transparent) + a set of chain links made "rigid decorated" set into it.
Would be rather poly-heavy, though.
Cheers,
Diolma
Edited to add: Trav: the problem with doing rope in the cloth room is that a tube (to carry the texture) collapses into something flat (like an empty fire-hose). I've tried it, and couldn't get it to work convincingly. Of course that may well be due to my own deficiencies.. Cheers, Diolma
Message edited on: 03/14/2006 15:49
How to make a tube keep its shape in dynamic cloth simulations? - Make a small one-sided strip, this will be the dynamic group; - Surround the small strip by a tube with approximately the same polygon size. This will be the soft decorated group. Should work! By the way, chains and PoserPhysics can do some very nice things. PoserPhysics will do the rigid body dynamics. Hmm. How would PoserPhysics and dynamic cloth play together? Time for some experiments, I guess.
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Oooh! Please do experiment, Steven!
Trying to get a catenary curve on a chain (even one with "smart-pose") is a real PITA!
Cheers,
Diolma
Edited to add: The best I ever achieved was to use the cloth room to calculate the curve; used a long strip of cloth attached at each end to a cube, moved the cubes towards each other at frame 20 and calculated. Then I exported the strip as .obj, and attached the chain-links manually in a modelling app, using the strip as a guide... Tedious..
Message edited on: 03/15/2006 15:29
dadt: I think you can select and assign material groups when using the cloth-room grouping tool. Try assigning different materials to the various bits, then selecting those materials in the cloth room?? The Pose-room grouping tool is easier to use than the cloth-room's one (IMHO). Or do the applying in a modelling app or UVMapper... Cheers, Diolma
Drat!! Now I've got to try to work out how I did it before! ('cos I did..) dadt: Are you using P5 or P6 (there may be a difference there..)? Are the materials "groups" within a single object? Just trying to narrow down the possibilities... And, I regret, I can't reply further tonight, it's WAAY past my bedtime! Cheers, Diolma (It CAN be done, but I forget how)...
Errm.. dadt, are you using the latest SRs for Poser 6? I used to get that wierd stuff in the cloth room too, but after installing SR2(?) it seemed to go away. Of course, it may have been something else that I did right without realising it.. All-in-all, I think I'd personally prefer to go with the rigid-decorated method. Easier to fix using post-work:-)) I also agree with E-Bob, fold resistance might work... I'm so glad you're working with this! I haven't had the chance to get to grips with it, been a little tied up (or should that be chained up?) lately.. Cheers, Diolma
The problem with increasing fold resistance is that when the chain hangs over the chair arm it curves out before dropping vertical and looks completely wrong. I don't usually have the problems with the cloth room and I just tried a different chain model which did not show the odd distortions during the draping.
That looks awesome, dadt! :)
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Quote - This was discussed on another forum, but not put into practice as far as I know. It was supposed that you might be able to apply transparency and displacement maps to a long thin strip of "cloth", and simulate that; but it wouldn't be good for big links since they'd be visibly deformed. Might be usable for fine, jewellery type chains though. The Poser Physics add-on might be able to do this.
Hmm.. it occurs to me that taking your chain object and laying it right on top a cloth plane would be the way to go here. Export the result to an obj file with the figure names checked and then reimport to a blank scene.
In the cloth room, specify the cloth plane as regular old dynamic cloth, put the chain portion into the soft decorated group and then drape.
Might take some adjusting to get the parameters right, but that would probably do the trick.
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It occurred to me, looking at Maveris' body chains in the RDNA store, that dynamic cloth ought to work to make flexible chains. Any of the cloth masters given any thought to that? I'm not terribly persuaded by the EasyPose chains I've seen, but when I think about dynamic chains, the first thing that comes to mind is a growing list of challenges. How to make the links solid and only the junctions flexible, for example. Has anyone seen chains used this way? M