AxisAngle is the right thing to do, and the most efficient. There is
a direct relation from axis/angle to the 4 by 4 3D transformation
matrix. You can find the formular from any robotics text book--look
for the twist/screw representation. Another alternative is the
quaternion, but that still involves the axis and angle of rotation.
Lily Lee
>
> Hey All,
>
> I'm having a particularly vexing rotation problem. I want to be able to
> rotate around multiple axes simultaneously. Currently, I perform the
> multiple rotations by creating 3 Transform3D's, and using rotX(xAngle) on
> one, rotY(yAngle) on another, and rotZ(zAngle) on the third. Then I
> multiply the 3 together in the order xTransform*yTransform*zTransform. This
> works fine. Unless....
>
> Say yAngle is 90 degrees. Then, due to the order of the rotations given
> above, rotations about x and z have the same effect- they both rotate about
> the z axis.
>
>
> I believe the way to solve this may be to use the AxisAngle object to set
> Transform3D. If I can form orthogonal vectors, and use AxisAngle to rotate
> around them, wouldn't this work? Or would there be a more efficient (ie
> faster) method?
>
> Thanks,
> Evan Drumwright
>
> ===========================================================================
> To unsubscribe, send email to [EMAIL PROTECTED] and include in the body
> of the message "signoff JAVA3D-INTEREST". For general help, send email to
> [EMAIL PROTECTED] and include in the body of the message "help".
>
===========================================================================
To unsubscribe, send email to [EMAIL PROTECTED] and include in the body
of the message "signoff JAVA3D-INTEREST". For general help, send email to
[EMAIL PROTECTED] and include in the body of the message "help".
