 | | | Particle rotation event script.... | Particle rotation event script.... 2004-03-10 - By Dan Yargici
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Thanks Kim. Yeah, I can reset the X and Z rotation fine but I still want the Y
rotation to be aligned to the velocity. I'm using VBScript.
PartRot = inParticlecloud.particles.RotationArray
myBound = ubound(PartRot,2)
for p = 0 to myBound
PartRot (0,p) = 0
PartRot (2,p) = 0
next
inParticlecloud.particles.rotationarray = PartRot
If I run this with 'Align on Velocity' activated my particles go completely
psycho! I think I'll need to calculate their rotation from their velocity
vectors but I just wouldn't know where to begin there....
DAN
-- -- Original Message -- --
From: kim aldis
To: XSI@(protected)
Sent: Wednesday, March 10, 2004 6:36 PM
Subject: RE: Particle rotation event script....
it should work, Dan. Although if you're doing it in jscript there are some
problems with re-assigning the arrays at the end of the loop. I used a cloud
-based script and just looped through the particles, setting the rotations as I
needed them. Worked pretty well for faking patch deforms and still getting the
orientation right.
-- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---
From: owner-xsi@(protected) [mailto:owner-xsi@(protected)] On Behalf Of
Dan Yargici
Sent: 10 March 2004 16:03
To: XSI@(protected)
Subject: Particle rotation event script....
I have a particle cloud with a bunch of instanced characters and their
rotation is set to 'align on velocity' but I would only like this to affect Y
rotation. I thought I might be able to take in the rotationarray for the cloud
and set the x and z rotation back to 0 on every frame but it seems the align on
velocity is applied after the script event, thus cancelling it out.
So the question is... how can I reset these or how can I derive my own Y
rotation from the velocity? I'm not much of a maths head ( I was once, honest!
) so any help would be greatly appreciated.
DAN
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<DIV><FONT face=Arial size=2>Thanks Kim. Yeah, I can reset the X
and Z rotation fine but I still want the Y rotation to be aligned to the
velocity. I'm using VBScript.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff size=2>PartRot =
inParticlecloud.particles.RotationArray</FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2>myBound =
ubound(PartRot,2)</FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff size=2>for p = 0 to myBound</FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2> PartRot (0,p) =
0<BR> PartRot (2,p) = 0</FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2>next</FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff
size=2>inParticlecloud.particles.rotationarray = PartRot</FONT></DIV><FONT
face=Arial size=2>
<DIV><BR>If I run this with 'Align on Velocity' activated my particles go
completely psycho! I think I'll need to calculate their rotation from
their velocity vectors but I just wouldn't know where to begin there....</DIV>
<DIV> </DIV>
<DIV>DAN</DIV>
<DIV></FONT><FONT face=Arial size=2> </DIV></FONT>
<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> Wednesday, March 10, 2004 6:36
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> RE: Particle rotation event
script....</DIV>
<DIV><BR></DIV>
<DIV dir=ltr align=left><SPAN class=171583316-10032004><FONT face=Arial
color=#008080 size=2>it should work, Dan. Although if you're doing it in
jscript there are some problems with re-assigning the arrays at the end of
the
loop. I used a cloud-based script and just looped through the particles,
setting the rotations as I needed them. Worked pretty well for faking patch
deforms and still getting the orientation right.</FONT></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>Dan
Yargici<BR><B>Sent:</B> 10 March 2004 16:03<BR><B>To:</B>
XSI@(protected)<BR><B>Subject:</B> Particle rotation event
script....<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV><FONT face=Arial size=2>I have a particle cloud with a bunch of
instanced characters and their rotation is set to 'align on velocity' but I
would only like this to affect Y rotation. I thought I might be able
to take in the rotationarray for the cloud and set the x and z rotation
back
to 0 on every frame but it seems the align on velocity is applied after the
script event, thus cancelling it out.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>So the question is... how can I reset these or
how can I derive my own Y rotation from the velocity? I'm not
much of a maths head ( I was once, honest! ) so any help would be greatly
appreciated.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial
size=2>DAN</FONT></DIV></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>
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