----- Original Message -----
From: Jon Barrilleaux <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Thursday, September 16, 1999 9:29 AM
Subject: Re: [JAVA3D] Rotation
> If I understand you correctly what you want is for a Vector3d to be
> facing the same direction. Do you want the vector in local or world
> coordinates?
>
> Assuming local coordinates then you could build a Transform3D using
> your axis angle and then use it to transform a vector pointing along
> the -Z axis.
that's what i done but it doesnt work....
I got the rotation matrix form axisangle and the multiplied the vector
(0,0,-1) for
this matrix....There are metedos to multiply a vector and a matrix?
> If you want world coordinates then you need to apply your axis angle
> to the TransformGroup, get its local-to-vworld transform, and then use
> this transform to transform the -Z vector.
>
> good luck
>
> --jon
>
> > Date: Wed, 15 Sep 1999 16:57:08 +0200
> > From: Ale <[EMAIL PROTECTED]>
> > Subject: Rotation
> >
> > This is a multi-part message in MIME format.
> >
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> >
> > Hi,
> > I've set up a Transform3D to rotate an object using a AxisAngle4d(used =
> > in setRotation metod) ,there is a way to create a Vector3d facing the =
> > same thirection?
> > I need this vector to translate the object in the direction is facing.
>
> ____________________ Peculiar Technologies ____________________
> Jon Barrilleaux 3800 Lake Shore Ave. Purveyors of
> [EMAIL PROTECTED] Oakland, CA 94610 Alternate Reality
> 510.444.4370 voc Augmented Simulation
> 510.444.0231 fax www.augsim.com and 3D Solutions
>
>
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