 | | | Scripted op refresh | Scripted op refresh 2004-05-06 - By Graham D Clark
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Dan,
If your source is fcurves you won't have the 1 frame off sync issue,
plus with fcurves you can eval(time), for forcing an update of my my
scop I usually set key on custom parameter variable that is part of the
scop and then updatecontext that param within the scop.
If you must use an expression source for scops in the future I'm sorry I
don't know a way to get around the 1 frame off issue with scops
referencing sources other than fcurves, perhaps except by plotting the
expressioned object, or compensating with an offset in space or time or
using a dummy lead object as reference.
Graham
PS you shouldn't get much "personally I'd script it better". writing
scops is not easy.
-- ---- ---- ---- ---- ---- --
http://www.grahamdclark.com <http://www.grahamdclark.com/>
2nd hand TD
-- --Original Message-- --
From: owner-xsi@(protected) [mailto:owner-xsi@(protected)] On Behalf
Of Dan Hope
Sent: May 6, 2004 12:02 PM
To: XSI@(protected)
Subject: Scripted op refresh
I've got a really annoying problem that I can't sort out....
I've set up a scripted op on the "scaling along curve" parameter of a
cylinder deformed along a curve...it goes something like this:
getcurvelength "crvlist", MyLength
Out.Value = MyLength/10
I then have a variable with an expression "Fc" set to force an update of
the script at every frame.
My problem is that it appears to evaluate the expression when exiting
the frame, meaning that the length of the cylinder is always one frame
behind the curve. How do I get them to be in sync?
Bearing in mind this is my first scripted op, please, be gentle....none
of this "personally I'd script it better" please....you know who you are
;o)
Ta
Dan
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<DIV><SPAN class=611192414-06052004><FONT face=Arial color=#0000ff
size=2>Dan,</FONT></SPAN></DIV>
<DIV><SPAN class=611192414-06052004><FONT face=Arial color=#0000ff size=2>If
your source is fcurves you won't have the 1 frame off sync issue, plus with
fcurves you can eval(time), for forcing an update of my my scop I usually
set key on custom parameter variable that is part of the scop and then
updatecontext that param within the scop.</FONT></SPAN></DIV>
<DIV><SPAN class=611192414-06052004><FONT face=Arial color=#0000ff size=2>If
you
must use an expression source for scops in the future I'm sorry I don't
know a way to get around the 1 frame off issue with scops referencing
sources other than fcurves, perhaps except by plotting the expressioned
object, or compensating with an offset in space or time or using a dummy
lead object as reference.</FONT></SPAN></DIV>
<DIV><SPAN class=611192414-06052004></SPAN><SPAN class=611192414-06052004><FONT
face=Arial color=#0000ff size=2>Graham</FONT></SPAN></DIV>
<DIV><SPAN class=611192414-06052004><FONT face=Arial color=#0000ff
size=2>PS you shouldn't get much<FONT color=#000000> "personally
I'd script it better"</FONT><FONT color=#0000ff>. writing scops is not
easy.</FONT></FONT></SPAN></DIV>
<DIV><FONT face="Times New Roman">-- ---- ---- ---- ---- ---- --</FONT>
<BR><FONT face="Times New Roman"><A
href="http://www.grahamdclark.com/">http://www.grahamdclark.com</A></FONT>
<BR><FONT face="Times New Roman">2nd hand TD</FONT> </DIV>
<BLOCKQUOTE
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px solid;
MARGIN-RIGHT: 0px">
<DIV></DIV>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left><FONT
face=Tahoma size=2>-- --Original Message-- --<BR><B>From:</B>
owner-xsi@(protected) [mailto:owner-xsi@(protected)] <B>On Behalf Of
</B>Dan Hope<BR><B>Sent:</B> May 6, 2004 12:02 PM<BR><B>To:</B>
XSI@(protected)<BR><B>Subject:</B> Scripted op refresh<BR><BR></FONT></DIV>
<DIV><FONT face=Arial size=2>I've got a really annoying problem that I can't
sort out....</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I've set up a scripted op on the "scaling along
curve" parameter of a cylinder deformed along a curve...it goes something
like
this:</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Courier size=2>getcurvelength "crvlist", MyLength</FONT></DIV>
<DIV><FONT size=2><FONT face=Courier>Out.Value =
MyLength/10</FONT></FONT></DIV>
<DIV><FONT face=Courier size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I then have a variable with an expression "Fc"
set to force an update of the script at every frame.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>My problem is that it appears to evaluate the
expression when exiting the frame, meaning that the length of the cylinder is
always one frame behind the curve. How do I get them to be in
sync?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Bearing in mind this is my first scripted op,
please, be gentle....none of this "personally I'd script it better"
please....you know who you are ;o)</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Ta</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial
size=2>Dan</FONT></DIV><BR>__ ____ ____ ____ ____ ____ ____ ____ ____ ____ __
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