Dave,
Yeah, this one is a bit funny. Think of it this way. The axis of
rotation starts out as the y-axis. Your "axisOfRotation" will be a
transform that will move the positive y-axis to your desired rotation
axis. For example:
// To rotate around positive x-axis, rotate the y-axis by -90 deg about
Z
Transform3D axisOfRotation = new Transform3D();
axisOfRotation.rotZ( Math.toRadians(-90) );
rotinterp = new RotationInterpolator(myalpha, mytarget, axisOfRotation,
minimumAngle, maximumAngle);
If instead you wanted to rotate about the positive z-axis, then:
axisOfRotation.rotX( Math.toRadians(90) );
Hope this helps.
-Lee
J. Lee Dixon
SAIC - Celebration, FL
407-566-1438
[EMAIL PROTECTED] AOL: LeeOrlando
-----Original Message-----
From: Jarzabek, David [mailto:[EMAIL PROTECTED]]
Sent: Monday, November 06, 2000 9:10 AM
To: [EMAIL PROTECTED]
Subject: [JAVA3D] Axis of rotation question
I'm working my way through the tutorial and I wanted to make
the YoYo example rotate around the X-Axis rather than the Y-Axis.
The constructor for the RotationInterpolator class has a rotation
axis parameter, but it is of class Transform3D, rather than something
a bit more obvious like a class member defining the axis of rotation.
I was successful in rotating the model so that the ends of the
yoyo were vertical rather than horizontal, but the axis of rotation
was still not what I was looking for.
I'm sure the answer is trivial, but I still haven't made the connection.
Thanks, Dave J
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