Cloth / particles question 2004-06-07 - By Olivier jeannel
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"I dont but hey thats just me." Seem's you're not alone. But I got some
sastifying results (means graphicly interesting though not accurate) doing an
umbrella opening with cloth/collision/enveloppe. That was quite cool and fast
(I don't know if you know Motion Designer in LW, but coming from that..)
Does it help ? Well at least it clears out some points, so thank you for that.
For the script idea, I'm too noob to XSI atm, so I'll bang my head anotherday
on that. I'm on prod (freelance alone) atm, and that's my first with XSI. So I
take everything full frontal from modelling to rendering (MR Arrrgh ! ).
I guess I'm just gonna simplify the idea, as the client just phoned to modify a
few thing, so I have to hurry.
Thanx for taking time to answer, I'll go back to this asap (or I'll just get
Syflex on 4 :)))) ). But anyway thank you :)
-- -- Original Message -- --
From: peterb
To: XSI@(protected)
Sent: Monday, June 07, 2004 4:51 PM
Subject: Re: Cloth / particles question
I love cloth in 3.5 :)
I dont but hey thats just me.
I would like to make some kind of flower-petal rain (Maped hemisphere), and
when the petal hits some colision object it bounce and deform a bit.
I've tried with some instanced particles, but the cloth doesn't seems to
work. It sounds normal IMHO, because of the nature of instance.
There is indeed no way you would get that with instanced particles.
The instanced geometry is identical to the original in the instanced group.
So it cant deform, unless the original is deformed.
Eg if you have a lot of loop-animated characters in the instance group, each
with their animation offset, then your particleinstances would be offset in the
very same way, enabling some "simple" crowd animation.
But no "unique" animation for each instance.
I've tried to attach one hemisphere to one particle (cluster constraint),
apply cloth (or softbody) and set obstacle. But with no luck. Either it bounce
away from the constraining particle, or it isn't affected at all by the
collision object.
I would plot the paths of the particle(s) and the use the path for the
hemisphere. (with tangency , upvector,.. options)
Then select some points on the object and assign the cloth to them. That
should work.
I would stay away from collisions though as thats where the mess with XSI
cloth begins.
If you have a lot of objects, this is fairly easy to script. (as in: even I
can do it)
as in: for each curve, load in a the model you want, animate it using the
curve, with the proper options.
Note that it will get much heavier than your instanced particles were though,
since you will have all "unique" models.
Hope this helps?
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<DIV><FONT face=Arial size=2>"I dont but hey thats just me." Seem's you're not
alone. But I got some sastifying results (means graphicly interesting though
not
accurate) doing an umbrella opening with cloth/collision/enveloppe. That was
quite cool and fast (I don't know if you know Motion Designer in LW, but coming
from that..)</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Does it help ? Well at least it clears out some
points, so thank you for that. </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>For the script idea, I'm too noob to XSI atm, so
I'll bang my head anotherday on that. I'm on prod (freelance alone) atm,
and that's my first with XSI. So I take everything full frontal from modelling
to rendering (MR Arrrgh ! ).</FONT></DIV>
<DIV><FONT face=Arial size=2>I guess I'm just gonna simplify the idea, as the
client just phoned to modify a few thing, so I have to hurry.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Thanx for taking time to answer, I'll go back to
this asap (or I'll just get Syflex on 4 :)))) ). But anyway thank you
:)</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<BLOCKQUOTE dir=ltr
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT:
#000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">-- -- Original Message -- -- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=peter_b@(protected) href="mailto:peter_b@(protected)">peterb</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=XSI@(protected)
href="mailto:XSI@(protected)">XSI@(protected)</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Monday, June 07, 2004 4:51 PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Cloth / particles
question</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial size=2></FONT><BR> </DIV>
<BLOCKQUOTE dir=ltr
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT:
#000000 2px solid; MARGIN-RIGHT: 0px">
<DIV><FONT face=Arial size=2>I love cloth in 3.5 :)</FONT></DIV><
/BLOCKQUOTE>
<DIV dir=ltr><FONT face=Arial><FONT size=2><FONT face=Arial size=2>I dont but
hey thats just me.</FONT></FONT></FONT></DIV>
<BLOCKQUOTE dir=ltr
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT:
#000000 2px solid; MARGIN-RIGHT: 0px">
<DIV><FONT face=Arial size=2>I would like to make some kind of flower-petal
rain (Maped hemisphere), and when the petal hits some colision object it
bounce and deform a bit.</FONT></DIV>
<DIV><FONT face=Arial size=2>I've tried with some instanced particles, but
the cloth doesn't seems to work. It sounds normal IMHO, because of the
nature of instance.</FONT></DIV></BLOCKQUOTE>
<DIV dir=ltr><FONT face=Arial><FONT size=2><FONT face=Arial size=2>There is
indeed no way you would get that with instanced
particles.</FONT></FONT></FONT></DIV>
<DIV dir=ltr><FONT face=Arial size=2>The instanced geometry is identical to
the original in the instanced group.</FONT></DIV>
<DIV dir=ltr><FONT face=Arial size=2>So it cant deform, unless the original
is
deformed. </FONT></DIV>
<DIV dir=ltr><FONT face=Arial size=2>Eg if you have a lot of
loop-animated characters in the instance group, each with their
animation offset, then your particleinstances would be offset in the
very
same way, enabling some "simple" crowd animation.</FONT></DIV>
<DIV dir=ltr><FONT face=Arial size=2>But no "unique" animation for each
instance.</FONT></DIV>
<BLOCKQUOTE dir=ltr
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT:
#000000 2px solid; MARGIN-RIGHT: 0px">
<DIV><FONT face=Arial size=2>I've tried to attach one hemisphere to one
particle (cluster constraint), apply cloth (or softbody) and set obstacle.
But with no luck. Either it bounce away from the constraining particle, or
it isn't affected at all by the collision object.</FONT></DIV></BLOCKQUOTE>
<DIV dir=ltr><FONT face=Arial size=2>I would plot the paths of the particle(s
)
and the use the path for the hemisphere. (with tangency , upvector,..
options)</FONT></DIV>
<DIV dir=ltr><FONT face=Arial size=2>Then select some points on the object
and
assign the cloth to them. That should work.</FONT></DIV>
<DIV dir=ltr>
<DIV dir=ltr><FONT face=Arial size=2>I would stay away from collisions though
as thats where the mess with XSI cloth begins.</FONT></DIV></DIV>
<DIV dir=ltr><FONT face=Arial size=2></FONT> </DIV>
<DIV dir=ltr><FONT face=Arial size=2>If you have a lot of objects, this is
fairly easy to script. (as in: even I can do it)</FONT></DIV>
<DIV dir=ltr><FONT face=Arial size=2>as in: for each curve, load in a the
model you want, animate it using the curve, with the proper
options.</FONT></DIV>
<DIV dir=ltr><FONT face=Arial size=2>Note that it will get much heavier than
your instanced particles were though, since you will have all "unique"
models.</FONT></DIV>
<DIV dir=ltr><FONT face=Arial size=2></FONT> </DIV>
<DIV dir=ltr><FONT face=Arial size=2>Hope this
helps?</FONT></DIV></BLOCKQUOTE></BODY></HTML>
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