If I understand your question correctly, you are asking about the
line:
angle.get(a);
'angle' is an instance of AxisAngle4d. So the 'get' method stores
the fields of angle in the array a st. a[0-3] =
(axisX,axisY,axisZ,theta) where a is a is an array of doubles. I hope
this answered your question.
DereK
On Tue, 30 May 2000, Pondrom, Pierre L wrote:
> I'm curious about what routine sets the a array? Is it Matrix3d or
> AxisAngle4d?
>
> > ----------
> > From: Derek Augustus Ruths[SMTP:[EMAIL PROTECTED]]
> > Reply To: Discussion list for Java 3D API
> > Sent: Tuesday, May 30, 2000 2:50 PM
> > To: [EMAIL PROTECTED]
> > Subject: [JAVA3D] Transform3D NaN results
> >
> > I have discovered that the following code produces non numeric
> > results:
> >
> > double thetaX,thetaY;
> > Transform3D t1,t2;
> > double[] a=new double[4];
> > Matrix3d mat=new Matrix3d();
> > AxisAngle4d angle=new AxisAngle4d();
> >
> > ...
> >
> > t1.rotX(thetaX);
> > t2.rotY(thetaY);
> > t1.mul(t2);
> > t1.normalize();
> > t1.get(mat);
> > angle.set(mat);
> > angle.get(a);
> >
> > Namely, when thetaX or thetaY = 0, the axis values of angle,
> > stored in a, are reported as NaN. It this a problem people are familiar
> > with? My method seems straight-forward such that I'm not doing anything
> > technically wrong. If anyone has any thoughts on this, they would be much
> > appreciated. Thanks.
> >
> > DereK
> >
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>
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