Oops had an attachment on prior post, here it is sans oversized file... I think I see what you're asking. This scene: https://dl.dropbox.com/u/3602519/example_conformToSimulatedSurface.zip doesn't do what you want, then, because you want the simulation to "flow" down the cylinder's topology as it deforms, not just flow downwards in global space, right?
Take a look at paul smith aka pooby's vimeo posts on vector flow. On Tue, Jan 29, 2013 at 2:42 PM, Andy Moorer <andymoo...@gmail.com> wrote: > I made a cheesy compound implementing paul's vector field concept a while > back and just jammed it into the example scene I made... this is what you > want it to do, right? > > It get's a bit more complex, basically I've made sure a curve and the > surface are deforming together, and then use that curve to specify a > direction vector on each point of the deforming mesh, which is updated per > frame. That vector is then used as a force in the same simulation. > > > https://dl.dropbox.com/u/3602519/example_conformToSimulatedSurface_vectorField.zip > > Byron, check out http://andy.moonbase.net/archives/905 on my site, it > doesn't fully answer your question but has some application in that > direction. Also I think Brad Gabe touched on this topic in a vemeo post... > > Cheers all. > > > On Tue, Jan 29, 2013 at 2:33 PM, Toonafish <ron...@toonafish.nl> wrote: > >> maybe this tutorial by Helge Mathee will help : http://vimeo.com/1503174 >> >> - Ronald >> >> >> >> On 1/29/2013 20:17, Byron Nash wrote: >> >> On this topic, what's a good way to grow the particles "organically". For >> example, have particles grow or change outwardly from a point of origin? >> Similar to how a moss or other growth would encompass an object. >> >> >> On Tue, Jan 29, 2013 at 1:32 PM, Rob Chapman <tekano....@gmail.com>wrote: >> >>> not really :) >>> >>> so this move to closest location now worked as expected then or not? >>> if the 'hand' or surface is moving or deforming you could also account for >>> a velocity force from the closest location as well. point position is not >>> the only thing you can get from a location. >>> >>> >>> On 29 January 2013 18:13, Nuno Conceicao <nunoalexconcei...@gmail.com>wrote: >>> >>>> This actually gives an undesired result, basically the particles kind >>>> of stay inert not really following the surface (that is deforming/moving >>>> underneath) imagine u have a ball on your hand and move it quickly, the >>>> ball inertia makes it stay where it is then it drops/sticks to the closest >>>> surface (could be your other hand or the floor) >>>> :) >>>> >>>> What i really want is for them to move on the skin surface, lets say >>>> from the tip of your index finger to the base of the finger, while your >>>> hand is moving... >>>> Hope this makes my point a bit clearer :) >>>> >>>> >>>> >>>> >>>> On Tue, Jan 29, 2013 at 5:39 PM, Sandy Sutherland < >>>> sandy.sutherl...@triggerfish.co.za> wrote: >>>> >>>>> If you use the get closest location - then the position it returns >>>>> you can feed right into a self.PointPosition set data node - if you type >>>>> into the search box 'set point position' then you should find a node. If >>>>> you put that setup after any other forces or move nodes, then it will make >>>>> the movements then stick the points to the surface. >>>>> >>>>> S. >>>>> >>>>> * * >>>>> Sandy Sutherland <sandy.sutherl...@triggerfish.co.za> | Technical >>>>> Supervisor >>>>> <http://triggerfish.co.za/en> >>>>> <http://www.facebook.com/triggerfishanimation> >>>>> <http://www.twitter.com/triggerfishza> >>>>> ------------------------------ >>>>> *From:* softimage-boun...@listproc.autodesk.com [ >>>>> softimage-boun...@listproc.autodesk.com] on behalf of Nuno Conceicao [ >>>>> nunoalexconcei...@gmail.com] >>>>> *Sent:* 29 January 2013 19:31 >>>>> >>>>> *To:* softimage@listproc.autodesk.com >>>>> *Subject:* Re: Surface Flowing Particles >>>>> >>>>> Sorry, Rob, not really sure what you mean with "set closest >>>>> location" >>>>> >>>>> >>>>> On Tue, Jan 29, 2013 at 5:02 PM, Rob Chapman <tekano....@gmail.com>wrote: >>>>> >>>>>> also a get closest location (your surface) > set closest location >>>>>> will stick your particles to the surface but still allow them to move >>>>>> around with forces and simulation. >>>>>> >>>>>> >>>>>> >>>>>> On 29 January 2013 16:57, Renaud Bousquet < >>>>>> renaud.bousq...@modusfx.com> wrote: >>>>>> > Hello, >>>>>> > >>>>>> > Something like this could help you for particles movements. >>>>>> > http://vimeo.com/36709750 >>>>>> > >>>>>> > Create a vector flow then use it as a force for your particles via >>>>>> closest >>>>>> > location. >>>>>> > Hope it can help you! >>>>>> > >>>>>> > RB >>>>>> > >>>>>> > >>>>>> > On 29/01/2013 11:14 AM, Nuno Conceicao wrote: >>>>>> >> >>>>>> >> Hi guys, just came across this task where basically I need to >>>>>> create a >>>>>> >> kind of growing particles effect (Ex: foam/bubbles) where the >>>>>> particles >>>>>> >> move, multiply and grow on a deforming surface. >>>>>> >> >>>>>> >> Basically, cant use stick to surface, flow around surface also >>>>>> doesnt work >>>>>> >> since the particles need to kind of stay on the surface at all >>>>>> times. Cant >>>>>> >> get Slide on surface to work properly too. >>>>>> >> >>>>>> >> Using an expanding weight-map kind of gets something close but >>>>>> quite >>>>>> >> different to what i wish to achieve, the problem is that the >>>>>> particles >>>>>> >> should also move and slide, so they cant be stuck on the surface, >>>>>> but follow >>>>>> >> its deformation.. >>>>>> >> >>>>>> >> I also tried a process using states to make the particles spawn >>>>>> once they >>>>>> >> achieve a certain size, pop into 2 or 3 smaller bubbles which in >>>>>> turn pop >>>>>> >> again into smaller ones, but couldn't get them to follow the >>>>>> surface >>>>>> >> properly. >>>>>> >> >>>>>> >> I guess that might be several approaches for the issue, maybe >>>>>> someone >>>>>> >> knows a compound that does something similar that could maybe be >>>>>> adapted to >>>>>> >> this purpose. >>>>>> >> >>>>>> >> Cheers >>>>>> >> >>>>>> >> Nuno >>>>>> > >>>>>> > >>>>>> > >>>>>> >>>>> >>>>> >>>> >>> >> >> >> -- >> Ronald van Vemden >> ----------------------------------------------- >> 3D Graphics & Animation >> Cyberfish Laboratories | www.cyberfish.nl >> Toonafish | www.toonafish.nl >> tel. +31(0)20 5289291 >> fax +31(0)20 5289292 >> email: ron...@toonafish.nl >> >> >
