Softimage Nvidia Flex
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Flex to Si
updated March 2023 — (from the zip's readme) Flex to Si is a connector to Flex (NVidia's hardware accelerated physics framework).
Not all flex features are enabled, only calculation of fluids and their collision
with static and dynamic geometry.
Installation : put in the same directory e.g. c:\Users\alex\Autodesk\Softimage_2015_R2-SP2\Application\Plugins\nt-x86-64\flextest\ Needs DirectX!!!
Configurable parameters include (see the archive readme for some more explanation): Fluid Mode, Max Particles, Substeps, NumIterations, Speed, Max Particle Speed, Fluid Resolution Multiplier, Fluid resolution, Collision distace, Rest offset, Shape collision margin, Particle collision margin, World Gravity, Adhesion Strength, Cohesion Force, Surface Tension, Viscosity, Vorticity, Dynamic Friction, Static Friction, Particle Friction, Drag, Lift, Damping, Static triangle mesh, Static SDF mesh, Kinematic substeps, Kinematic triangle mesh, Plane Null, Use Ground Plane.
local backup: flex_to_xsi_2.06_1_17_2023.zip
Installation : put in the same directory e.g. c:\Users\alex\Autodesk\Softimage_2015_R2-SP2\Application\Plugins\nt-x86-64\flextest\ Needs DirectX!!!
Configurable parameters include (see the archive readme for some more explanation): Fluid Mode, Max Particles, Substeps, NumIterations, Speed, Max Particle Speed, Fluid Resolution Multiplier, Fluid resolution, Collision distace, Rest offset, Shape collision margin, Particle collision margin, World Gravity, Adhesion Strength, Cohesion Force, Surface Tension, Viscosity, Vorticity, Dynamic Friction, Static Friction, Particle Friction, Drag, Lift, Damping, Static triangle mesh, Static SDF mesh, Kinematic substeps, Kinematic triangle mesh, Plane Null, Use Ground Plane.
local backup: flex_to_xsi_2.06_1_17_2023.zip
Re: Softimage Nvidia Flex
PD:: do you guys want a small tutorial on how I am creating the VDB vector fields? Or is that something already known here? Because I never used it before and one day ussing hudini my mind says, well you can do this in xsi thanks to oleg...lets try, and it works, but never seen anyone using it theese way so.... If there is interest I can create a small video and scene showing the process
Re: Softimage Nvidia Flex
I was thinking about a gas/cloth interaction similar to what's in this video of your's
but with air instead of water. So the cloth would be "under" air particles and the external forces would act on the air instead of the cloth directly.
I'm not sure if it's possible to make that one simulate stable/fast enough, but I think that two-way interaction is what's missing from most cloth simulations I've seen so far --- I always had the impression that they simulate cloth in a vacuum and the "fake" forces only work one-way instead of back and forth between cloth and air.
but with air instead of water. So the cloth would be "under" air particles and the external forces would act on the air instead of the cloth directly.
I'm not sure if it's possible to make that one simulate stable/fast enough, but I think that two-way interaction is what's missing from most cloth simulations I've seen so far --- I always had the impression that they simulate cloth in a vacuum and the "fake" forces only work one-way instead of back and forth between cloth and air.
The plastic bag scene is probably the first thing I'd try to recreate when it's released. So I wouldn't peek how it's done. Depends on you & your time ofc! but would be interesting to compare the results later.I will try yo replicate that and add it to the bundle if you want
softimage resources section updated Jan 5th 2024
Re: Softimage Nvidia Flex
I dont think thats possible in the way you say, sorry
but you can offcourse "fake or create" dual interaction forces if you use a vdb field, first you create your rest air( rest in sense there is not cloth, but you can add some animated noise ) you add the cloth, and apply the field forces to the cloth, simulate, then you have new forces on the cloth caused by both the field and the solver, if you apply that new force derived from cloth to the field again, you are modifiying the field, so you have some interaction... Ofcourse you will need a fluid solver in case you want swirly air movenent i think, but you can use emFluid5 at low res to do the advection instead of a simple vdb field, and with that you can fake a very low dense ambient...
All i said now is pure thinking, dindt try anything yet but I hope that make some sense for you
About the cloth specific forces I talk before...From the flex manual : "Lift and drag - Triangles will generate drag forces and lift forces proportional to area and orientation. This can generate interesting fluttering motion on pieces of cloth, typically drag forces should be set higher than lift."
but you can offcourse "fake or create" dual interaction forces if you use a vdb field, first you create your rest air( rest in sense there is not cloth, but you can add some animated noise ) you add the cloth, and apply the field forces to the cloth, simulate, then you have new forces on the cloth caused by both the field and the solver, if you apply that new force derived from cloth to the field again, you are modifiying the field, so you have some interaction... Ofcourse you will need a fluid solver in case you want swirly air movenent i think, but you can use emFluid5 at low res to do the advection instead of a simple vdb field, and with that you can fake a very low dense ambient...
All i said now is pure thinking, dindt try anything yet but I hope that make some sense for you
About the cloth specific forces I talk before...From the flex manual : "Lift and drag - Triangles will generate drag forces and lift forces proportional to area and orientation. This can generate interesting fluttering motion on pieces of cloth, typically drag forces should be set higher than lift."
Re: Softimage Nvidia Flex
Hi there! I have finished and tested the Skin Setup and it is workig very good
Re: Softimage Nvidia Flex
Haha I didn't think this creepy thing could be made any creepier, I couldn't have been more wrong Great stuff again!
Air+cloth 2-in-1 simulation would be a great research topic for a scientist. Sadly nothing to be found anywhere yet.
I was already guessing it's a better fit for a volumetric instead of particle approach. Thanks for the workaround-workflow tips, I'll surely try that out.
Air+cloth 2-in-1 simulation would be a great research topic for a scientist. Sadly nothing to be found anywhere yet.
I was already guessing it's a better fit for a volumetric instead of particle approach. Thanks for the workaround-workflow tips, I'll surely try that out.
softimage resources section updated Jan 5th 2024
Re: Softimage Nvidia Flex
Is there any news ?
Long time no new videos on vimeo channel ((
Long time no new videos on vimeo channel ((
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Re: Softimage Nvidia Flex
Still waiting
Re: Softimage Nvidia Flex
Hi everyone!
Sorry for the long time no news anywhere,
in fact I had this project a bit abandoned last month because of lot of work at the office and some personal issues that doesn't allowed me to work in house.
I'm trying to get some time to finish it, It could be released now but there are a lot of small thing I will like to fix before releasing it...sorry for tat :S
But if I encounter my self again without any time to finish it....well I will probably release it for everyone as it is in not to much.
Hope you guys understand it, and I promise it will not be to long from now!
PD:: the only thing extra from the lasts videos ( including some fixes ) is a scene with hair made with strands and FLEX (very simple one ), and a faster version of the CONSTRAINED_GRAINS_SETUP of the first video.
Sorry for the long time no news anywhere,
in fact I had this project a bit abandoned last month because of lot of work at the office and some personal issues that doesn't allowed me to work in house.
I'm trying to get some time to finish it, It could be released now but there are a lot of small thing I will like to fix before releasing it...sorry for tat :S
But if I encounter my self again without any time to finish it....well I will probably release it for everyone as it is in not to much.
Hope you guys understand it, and I promise it will not be to long from now!
PD:: the only thing extra from the lasts videos ( including some fixes ) is a scene with hair made with strands and FLEX (very simple one ), and a faster version of the CONSTRAINED_GRAINS_SETUP of the first video.
Re: Softimage Nvidia Flex
I am very much looking forward to it !
Re: Softimage Nvidia Flex
Great to hear - hoping everything works out well for this project (and you!!)
softimage resources section updated Jan 5th 2024
Re: Softimage Nvidia Flex
Hi there! Look at this
You will also have it for xsi sonn! I promise
You will also have it for xsi sonn! I promise
Re: Softimage Nvidia Flex
>>You will also have it for xsi sonn! I promise
Yay!
>>unscalable, limited particle count and nondeterminsitic, but pretty darn fast
Alright! See that's great.. seeing what to expect in 2 seconds, rather than sifting through PR swamp for 30 minutes!
Yay!
>>unscalable, limited particle count and nondeterminsitic, but pretty darn fast
Alright! See that's great.. seeing what to expect in 2 seconds, rather than sifting through PR swamp for 30 minutes!
softimage resources section updated Jan 5th 2024
Re: Softimage Nvidia Flex
I've been testing varying FLEX facilitated options over the last couple of years in Max, Lightwave and C4D (plus Houdini thanks to Pedohorse's generous efforts). I put together benchmark reports for a large advertising group (Publicis Groupe) each year of the major players.
The interesting this is that each plugin offering has exhibited different strengths. Lightwaves's Unified Physics plugin is rather nifty at course liquid sims. Used in the right way it's capable as well as fast. C4D has a plugin called Uniflex 4 (by Remotion, a single developer vendor). The plugin is flakey in general but it's softbody (inclusive if cloth) and rope simulations are stable, reasonably 'physical', performanant and fiercely fast on a latest generation GPU (I tested with a 1080 Ti). There are a couple of Max plugins available that make use of Flex for scattering (anything like rocks, pebbles, breakfast cereals - you get the picture).
Overall I'm left with the impression that as long is keep to the central tenet that Flex is:
I'm really excited to see what Pedrito has achieved with his Soft implementation of Flex. I'd imagine it will sit alongside Mr Mootz's wonderful suite of tools beautifully.
The interesting this is that each plugin offering has exhibited different strengths. Lightwaves's Unified Physics plugin is rather nifty at course liquid sims. Used in the right way it's capable as well as fast. C4D has a plugin called Uniflex 4 (by Remotion, a single developer vendor). The plugin is flakey in general but it's softbody (inclusive if cloth) and rope simulations are stable, reasonably 'physical', performanant and fiercely fast on a latest generation GPU (I tested with a 1080 Ti). There are a couple of Max plugins available that make use of Flex for scattering (anything like rocks, pebbles, breakfast cereals - you get the picture).
Overall I'm left with the impression that as long is keep to the central tenet that Flex is:
It's useful for so many use cases, especially motion design stuff where beautiful motion doesn't necessarily mean it has to be physically correct. You're also using far corser particle resolutions but that still leaves the door open to lots of creative exploration. With cloth the trick is hiding the underlying coarseness of the simulation but Remotion have managed to achieve this brilliantly with Uniflex."unscalable, limited particle count and non-deterministic, but pretty darn fast"
I'm really excited to see what Pedrito has achieved with his Soft implementation of Flex. I'd imagine it will sit alongside Mr Mootz's wonderful suite of tools beautifully.
Re: Softimage Nvidia Flex
The ICE vimeo channel keeps posting interesting XSI related updates, including more of Pedro's Flex research work
https://vimeo.com/groups/ice/videos
https://vimeo.com/groups/ice/videos
softimage resources section updated Jan 5th 2024
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