 | | | Create2DSkeleton/AppendBone root problem... | Create2DSkeleton/AppendBone root problem... 2005-06-15 - By Morten Bartholdy
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That's a gem Brad :)
-
Morten Bartholdy
3D & VFX Artist
-- -- Original Message -- --
From: Bradley R. Gabe
To: XSI@(protected) ; XSI@(protected)
Sent: Wednesday, June 15, 2005 2:44 AM
Subject: Re: Create2DSkeleton/AppendBone root problem...
Select any number of scene objects, then run the following jscript. It will
build a 2D chain with each bone pointing from one object to the next, in the
order they were selected. The chain root and first bone match orientation. This
is all object model, so it should be pretty fast, even for large selections:
// BEGIN SCRIPT -- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---
-- ---
// Create SIVector3 objects to store position vectors
var rootPos = XSIMath.CreateVector3();
var effPos = XSIMath.CreateVector3();
// Define Chain normal plane
var normalArr = [0,1,0];
// Get the global transforms from your first 2 selected objects
var rootTrans = selection(0).kinematics.global.transform;
var effTrans = selection(1).kinematics.global.transform;
// Pull the position vectors from the transform objects
rootTrans.GetTranslation(rootPos);
effTrans.GetTranslation(effPos);
// Create your chain root
var root = ActiveSceneRoot.Add3DChain(rootPos, effPos, normalArr, "ChainRoot"
);
var bone0 = root.bones(0);
// Finish off the rest of the chain from the rest of the selection
for(var i=2; i<selection.count; i++){
// Grab the global trans off the current item
effTrans = selection(i).kinematics.global.transform;
// Pull the position vector from the global transform;
effTrans.GetTranslation(effPos);
root.AddBone(effPos);
}
// Get the global transform off the first bone
var boneTrans = bone0.kinematics.global.transform;
// Assign the root and the first bone to the first bone's global trans
root.kinematics.global.transform = boneTrans;
bone0.kinematics.global.transform = boneTrans;
// END SCRIPT -- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- -----
----
Okay, I have a solution for you. But first a quick question: How are you
getting your chain element coordinates, is it from existing elements in the
scene?
One thing to keep in mind is the chain creation commands and methods rely
on global coordinates. So pulling them off existing nodes requires less code
than having to convert your own coordinates from local to global for everything
.
I'm not sure if there's a better way to do this trhough the object model,
but I am trying to build chains by specifying an array of (x,y,z position
coordinates) and a position for an up vector.
My procedure involves creating the first bone in the chain using
1- Create2DSkeleton command to generate the first bone
2- zero out the root to match a null correctly oriented.
3- zero out the first joint.
3- AppendBone to add additional bones.
Unfortunately, every time I use an AppendBone command, it seem to re
-orient the root and throws off the rotation bone values.
If anyone has a better procedure for handling chain ganeration, with
zeroing bones ???
THX
RSM
__ ____ ____ ____ ____ ____ ____ ____ ____ ____ _____
Raffaele Scaduto-Mendola - www.turbolinea.com
raffaele@(protected)
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<DIV><FONT face=Arial size=2>That's a gem Brad :)</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>-</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>Morten Bartholdy<BR>3D & VFX
Artist<BR><BR></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=brad@(protected) href="mailto:brad@(protected)">Bradley R. Gabe</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=XSI@(protected)
href="mailto:XSI@(protected)">XSI@(protected)</A> ; <A
title=XSI@(protected) href="mailto:XSI@(protected)">XSI@(protected)</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Wednesday, June 15, 2005 2:44
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Create2DSkeleton/AppendBone
root problem...</DIV>
<DIV><BR></DIV>Select any number of scene objects, then run the following
jscript. It will build a 2D chain with each bone pointing from one object to
the next, in the order they were selected. The chain root and first bone
match
orientation. This is all object model, so it should be pretty fast, even for
large selections:<BR><BR><FONT face="Courier New, Courier" color=#008000>//
BEGIN SCRIPT
-- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ----<BR>//
Create SIVector3 objects to store position vectors<BR></FONT><FONT
face="Courier New, Courier">var rootPos = XSIMath.CreateVector3();<BR>var
effPos = XSIMath.CreateVector3();<BR><BR></FONT><FONT
face="Courier New, Courier" color=#008000>// Define Chain normal
plane<BR></FONT><FONT face="Courier New, Courier">var normalArr =
[0,1,0];<BR><BR></FONT><FONT face="Courier New, Courier" color=#008000>// Get
the global transforms from your first 2 selected objects<BR></FONT><FONT
face="Courier New, Courier">var rootTrans =
selection(0).kinematics.global.transform;<BR>var effTrans =
selection(1).kinematics.global.transform;<BR><BR></FONT><FONT
face="Courier New, Courier" color=#008000>// Pull the position vectors from
the transform objects<BR></FONT><FONT
face="Courier New, Courier">rootTrans.GetTranslation(rootPos);<BR>effTrans
.GetTranslation(effPos);<BR><BR></FONT><FONT
face="Courier New, Courier" color=#008000>// Create your chain
root<BR></FONT><FONT face="Courier New, Courier">var root =
ActiveSceneRoot.Add3DChain(rootPos, effPos, normalArr, "ChainRoot");<BR>var
bone0 = root.bones(0);<BR><BR></FONT><FONT face="Courier New, Courier"
color=#008000>// Finish off the rest of the chain from the rest of the
selection<BR></FONT><FONT face="Courier New, Courier">for(var i=2;
i<selection.count;
i++){<BR><BR><X-TAB> </X-TAB>/
/
Grab the global trans off the current
item<BR><X-TAB> </X-TAB
>effTrans
=
selection(i).kinematics.global.transform;<BR><X-TAB>
</X-TAB><BR><X-TAB>
</X-TAB>//
Pull the position vector from the global
transform;<BR><X-TAB> </X-TAB
>effTrans.GetTranslation(effPos);<BR><X-TAB>
</X-TAB><BR><X-TAB> <
/X-TAB>root.AddBone(effPos);<BR>}<BR><BR></FONT><FONT
face="Courier New, Courier" color=#008000>// Get the global transform off the
first bone<BR></FONT><FONT face="Courier New, Courier">var boneTrans =
bone0.kinematics.global.transform; <BR><BR></FONT><FONT
face="Courier New, Courier" color=#008000>// Assign the root and the first
bone to the first bone's global trans<BR></FONT><FONT
face="Courier New, Courier">root.kinematics.global.transform =
boneTrans;<BR>bone0.kinematics.global.transform = boneTrans;<BR></FONT><FONT
face="Courier New, Courier" color=#008000>// END SCRIPT
-- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ----<BR><BR>
<BR></FONT>
<BLOCKQUOTE class=cite cite="" type="cite">Okay, I have a solution for you.
But first a quick question: How are you getting your chain element
coordinates, is it from existing elements in the scene?<BR><BR>One thing to
keep in mind is the chain creation commands and methods rely on global
coordinates. So pulling them off existing nodes requires less code than
having to convert your own coordinates from local to global for
everything.<BR><BR>
<BLOCKQUOTE class=cite cite="" type="cite">I'm not sure if there's a
better way to do this trhough the object model, but I am trying to build
chains by specifying an array of (x,y,z position coordinates) and a
position for an up vector.<BR><BR>My procedure involves creating the
first
bone in the chain using<BR><BR>1- Create2DSkeleton command to generate
the
first bone<BR>2- zero out the root to match a null correctly
oriented.<BR>3- zero out the first joint.<BR>3- AppendBone to add
additional bones.<BR><BR>Unfortunately, every time I use an AppendBone
command, it seem to re-orient the root and throws off the rotation bone
values.<BR><BR>If anyone has a better procedure for handling chain
ganeration, with zeroing bones
???<BR><BR><BR>THX<BR>RSM<BR><BR>__ ____ ____ ____ ____ ____ ____ ____ __
__ ____ _____<BR>Raffaele
Scaduto-Mendola - <A href="http://www.turbolinea.com/"
eudora="autourl">www.turbolinea.com</A><BR>
raffaele@(protected)<BR>---<BR>Unsubscribe? Mail
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