I guess you could simulate the shrinking with opacity, animate a gradient mixer mapped to the length of the strand maybe?
On Wed, Mar 5, 2014 at 7:02 PM, adrian wyer <[email protected]>wrote: > bah, don't have the time allocated for this, it's a quick design > thing, i can 'convince' them that its better if the trails fade out rather > than shrink > > > > another time perhaps > > > > a > > > ------------------------------ > > *From:* [email protected] [mailto: > [email protected]] *On Behalf Of *Gustavo Eggert > Boehs > *Sent:* 05 March 2014 17:25 > > *To:* [email protected] > *Subject:* Re: shrinking strands > > > > It really wont Adrian. See, if you would try to simpto rescale a set of > point positions in object space, they would move. > > > > What you could do is get the length from each segment and find out where > exactly you want to cut it based on length. Not trivial but I think > Kristinka does it. > > > > Or you could scale the whole thing but you would have to scale the point > position array respective to the particle ((point position array - > particle point position)*scale factor + particle point position). Scale > factor would be = newlength/oldlength. > > > > > > First solution might be really what you are going after. > > > Em quarta-feira, 5 de março de 2014, adrian wyer < > [email protected]> escreveu: > > > > > > i thought this might work...maybe i'm just not getting it? > > > > a > > > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Grahame > Fuller > Sent: 05 March 2014 16:39 > To: [email protected] > Subject: RE: shrinking strands > > > > StrandLength is just a custom attribute that gets set by some of the stand > compounds as a convenience, e.g., if you want to use it to drive something > else. It doesn't actually control the strand length, it's just the sum of > deltas in the StrandPosition array. > > > > If you want to make the strand shrink, you can remove the last item from > the > StrandPostion array instead. > > > > gray > > > > From: [email protected] > [mailto:[email protected]] On Behalf Of adrian wyer > > Sent: Wednesday, March 05, 2014 11:29 AM > > To: [email protected] > > Subject: shrinking strands > > > > quick question (work goes on even after yesterday) > > > > i have a particle system firing points that have strands trailing after > them, they stick to a surface on collision > > > > i have a state machine which, for starters, won't let me use "IsStuck" as a > trigger, i can work around this, but it's bloody annoying > > > > the problem is that once the particle enters state 1, IE is stuck on the > floor, i want the strand trail to shrink over time > > > > i have tried starting a timer on enter state 1, then grabbing values from > the timer and subtracting them from .strandlength, but it only shrinks on > the first frame, even though this is plugged into execute on every frame > > > > i can post a scene i f someone fancies having a look, or if anyone knows > how > to plot rocket trajectories and have them fade on impact, i'm all ears! > > > > thanks > > > > > > Adrian Wyer > > Fluid Pictures > > 75-77 Margaret St. > > London > > W1W 8SY > > ++44(0) 207 580 0829 > > > > [email protected]<blocked::blocked::blocked::blocked::mailto: > ad > [email protected]> > > www.fluid-pictures.com<blocked::blocked::blocked::blocked:: > http://www.fluid- > pictures.com/> > > > > Fluid Pictures Limited is registered in England and Wales. > > Company number:5657815 > > VAT number: 872 6893 71 > > > > > -- > > Gustavo E Boehs > Dpto. de Expressão Gráfica | Universidade Federal de Santa Catarina | > http://www.gustavoeb.com.br/ > > >
