 | | | Cloth sim flag ripples? | Cloth sim flag ripples? 2004-04-01 - By Morten Bartholdy
Back
Ta, Kim and Jamie - a bit like what I thought.
I guess I will have to roll up my sleeves and do it by hand :)
Morten
-- -- Original Message -- --
From: kim aldis
To: XSI@(protected)
Sent: Thursday, April 01, 2004 2:31 PM
Subject: RE: Cloth sim flag ripples?
I've never had satisfactory results using cloth alone but using cloth with a
combination of other deforms works well. Last time I used a fairly simply cloth
with some wind to get the base movement then added a couple of waves over the
top. The trick with waves and flags is to use linear waves, one or two fairly
low frequency then a couple of high frequency on top. Vary the frequency,
speed and orientation very slightly for each wave.
If you want real fine ripples then use a Perlin noise shader to bump or
displace it.
-- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---
From: owner-xsi@(protected) [mailto:owner-xsi@(protected)] On Behalf Of
Morten Bartholdy
Sent: 31 March 2004 23:53
To: XSI@(protected)
Subject: Cloth sim flag ripples?
I am working on creating a flag being pulled through the air, looking for a
nice rippling slowmotion style effect. I seem to be unable to get satisfactory
result with noise, and setting up complex systems of fans prove difficult to
control.
Noise seems to affect the flag in a non turbulent random way like a noise
field deforming the cloth rather than rippling it. I really wonder why we can't
use turbulence forces on cloth - it seems so obvious to get realistic motion
from that.
Anybody care to share a tip or two - or should I go the good old way of
hand animating it with waves and all that?
Best Regards
Morten Bartholdy
3D Animator & Visual Effects Supervisor
Colorshop VFX
Denmark
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=Content-Type content="text/html; charset=iso-8859 (See http://iso-8859.ora-code.com)-1">
<META content="MSHTML 6.00.2800.1400" name=GENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=#ffffff>
<DIV><FONT face=Arial size=2>Ta, Kim and Jamie - a bit like what I
thought.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I guess I will have to roll up my sleeves and do
it
by hand :)</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Morten</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=kim@(protected) href="mailto:kim@(protected)">kim aldis</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> Thursday, April 01, 2004 2:31
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> RE: Cloth sim flag
ripples?</DIV>
<DIV><BR></DIV>
<DIV dir=ltr align=left><SPAN class=515262712-01042004><FONT face=Arial
color=#008080 size=2>I've never had satisfactory results using cloth alone
but
using cloth with a combination of other deforms works well. Last time I used
a
fairly simply cloth with some wind to get the base movement then added a
couple of waves over the top. The trick with waves and flags is to use linear
waves, one or two fairly low frequency then a couple of high frequency
on top. Vary the frequency, speed and orientation very slightly for each
wave.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=515262712-01042004><FONT face=Arial
color=#008080 size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=515262712-01042004><FONT face=Arial
color=#008080 size=2>If you want real fine ripples then use a Perlin noise
shader to bump or displace it.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=515262712-01042004><FONT face=Arial
color=#008080 size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=515262712-01042004></SPAN> </DIV><BR>
<BLOCKQUOTE dir=ltr
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #008080 2px solid;
MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>From:</B> owner-xsi@(protected)
[mailto:owner-xsi@(protected)] <B>On Behalf Of </B>Morten
Bartholdy<BR><B>Sent:</B> 31 March 2004 23:53<BR><B>To:</B>
XSI@(protected)<BR><B>Subject:</B> Cloth sim flag
ripples?<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV><FONT face=Arial size=2>I am working on creating a flag being pulled
through the air, looking for a nice rippling slowmotion style effect. I
seem
to be unable to get satisfactory result with noise, and setting up complex
systems of fans prove difficult to control.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Noise seems to affect the flag in a non
turbulent random way like a noise field deforming the cloth rather than
rippling it. I really wonder why we can't use turbulence forces on cloth -
it seems so obvious to get realistic motion from that.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Anybody care to share a tip or two - or should
I go the good old way of hand animating it with waves and all
that?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Best Regards</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>Morten Bartholdy<BR>3D Animator & Visual
Effects Supervisor<BR>Colorshop
VFX<BR>Denmark</FONT></DIV></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>
|
|
|