I hope the image gets through.
this is what I get with closest location on group of curves, and combining the
pointtangent as a force, as well as a force pulling towards the closest
position – in order not to stray too far from the curve.
particles get emitted from the curves in the center, and you see that here they
follow the curves more closely, further out it does get more fuzzy – but they
do follow the curves and they do branch automatically.
I can see how this might not be precise enough compared to flow along curve.
From: Rob Chapman
Sent: Thursday, March 19, 2015 5:52 PM
To: softimage@listproc.autodesk.com
Subject: Re: ICE emit particles and follow branching geometry
closest location does not cut it when different curves overlap. you will have
to build a system using a unique curve ID and translate along each curve ID's
using curve u instead.
at least this way you could gracefully hand over particles between curves as it
reaches the end of each segment.
On 19 March 2015 at 16:42, Dave Sisk <d...@janimation.com> wrote:
Thanks for the responses guys.
I've continued with my "brute force" method for now because it gets the job
done. It involves several "Select Case" nodes with 29 cases each though, so you
can imagine why I was reluctant to string that up. :)
I've tried the suggested approach, but I usually get a jump to the same curve
over and over again when they overlap instead of continuing along their first
curve.
On Thu, Mar 19, 2015 at 11:33 AM, Eric Thivierge <ethivie...@hybride.com>
wrote:
Huh... works actually. I remember this not working before... carry on
never mind.
Eric T.
On 3/19/2015 12:25 PM, Eric Thivierge wrote:
Closest location doesn't work with curves fed in with a group. It always
uses the first one.
Eric T.
On 3/19/2015 12:23 PM, Grahame Fuller wrote:
Greg, any details about not getting it to work on curves? As far as I
know, it should.
gray
From: softimage-boun...@listproc.autodesk.com
[mailto:softimage-boun...@listproc.autodesk.com] On Behalf Of Eric Thivierge
Sent: Thursday, March 19, 2015 12:02 PM
To: softimage@listproc.autodesk.com
Subject: Re: ICE emit particles and follow branching geometry
Your best bet is to create a mesh from those curves and transfer the
curve's tangent onto the mesh as a vector attribute.
Emit from the curve but use the geo's attribute to set the direction.
How Paul Smith's hair grooming stuff works essentially.
Using a group of curves or even doing one curve at a time won't get a
nice smooth result I don't think. You'll probably get popping.
Eric T.
On 3/19/2015 11:48 AM, Greg Punchatz wrote:
Dave has got something worked out, but its not ideal. He cannot get a
group of curves to work, and is wiring up each one in by hand in the ICE tree.
What he wants to do is emit an objects from one end of a curve and the
have it follow the curve to the end.. but he wants to do this to a group of
curves. He can make it work one curve at a time fine, he can wire the
bizzilion curves up by hand but its not ideal.
On Thu, Mar 19, 2015 at 9:50 AM,
<pete...@skynet.be<mailto:pete...@skynet.be>> wrote:
I think you can get the closest point on a group of curves,
get the point-tangent from there and use that (vector) as a force,
combine to taste with turbulence, and perhaps a force pulling towards
the curve (vector from point to closest point) for extra control.
adding/removing curves to the group is all you’d need to do to add them
to the simulation.
hope this helps.
From: Dave Sisk<mailto:d...@janimation.com>
Sent: Thursday, March 19, 2015 3:27 PM
To:
softimage@listproc.autodesk.com<mailto:softimage@listproc.autodesk.com>
Subject: ICE emit particles and follow branching geometry
Hi, I'm trying to create an effect with particles flowing from one
several ends of branching geometry to another of several ends on the same
geometry.
Right now I'm working with Flow Along Curve and a bunch of
partially-overlapping curves that go from one end to the other, but since ICE
is pretty limited in what you can plug a geometry port into, I'm running into a
LOT of duplication that makes adding or removing curves a labor intensive
process.
Is there another approach to this I should be trying?
Thanks,
Dave Sisk
