RE: : SetRotationFromQuaternion

["Brent McPherson" <brentmc(at)Softimage.COM>]

Robert,

 

have you verified that the ordering of the quaternion components is the same?

 

Quaternions in XSI are defined as w,x,y,z but perhaps your .csv file is ordered x,y,z,w?

 

Just an idea...

--

Brent

---

From: owner-xsi(at)Softimage.COM [mailto:owner-xsi(at)Softimage.COM] On Behalf Of Robert Moodie
Sent: Wednesday, June 06, 2007 11:38 PM
To: XSI(at)Softimage.COM
Subject: SDK:: SetRotationFromQuaternion

I'm reading in a data file (.csv) and setting rotations from Quaternion data.

My problem is although the anim is working, the rotation values are wrong. I don't think that the SetRotationFromQuaternion method needs a Degrees2Radians conversion - is that right?

 

<--------------------------------------------------8<--------------------------------------------------------------->

var >   var >   var oTrans = XSIMath.CreateTransform();
   var oQuat = XSIMath.CreateQuaternion();
   
   for (x=1; x<=intEndFrame; x++)
    {
    s = ts.ReadLine();
    var a = s.split( "," );
    oQuat.Set(
     parseFloat( a[ 0 ] ),
     parseFloat( a[ 1 ] ),
     parseFloat( a[ 2 ] ),
     parseFloat( a[ 3 ] ) );
    
    oTrans.SetRotationFromQuaternion  ( oQuat );
    oNull.Kinematics.Local.Transform = oTrans;

 

    // Set keys, blah blah

<--------------------------------------------------8<--------------------------------------------------------------->

 

Cheers

_rob

 

 

ROBERT MOODIE
td :: pipeline/r&d

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