I've looked through the archives for Java3D and have read the
messages dealing with obtaining rotation angles and quaternions and
matrices, etc. However, from all of that information, I still
haven't been able to fix my problem.
I have a 3D graph, with the standard x,y,z axes and labels.
When I rotate the graph, the labels rotate with it, as they should.
However, depending on the direction of rotation, sometimes the labels
will appear upside down. And I'm trying to resolve this by having
"moving" labels that will always appear in the front and left sides
of the graph (labels will flip accordingly as the graph/cube is
rotated). To do this, I have used various methods to read the rotation
angles to determine which location to move a label to. I can get the
x and y angles of rotation fine but am having difficulty getting the
z rotation angle. For example, if I start off with the standard orientations
of Y being positive in the up direction, X being positive in the right
direction, and Z being positive coming out of the screen towards the viewer,
rotating Y by 90 degrees will have me looking at the Z axis on the
horizontal. Now, if I try to rotate in the + or - z directions, it
is the X rotation angle that changes. I got it to work as long as the
X axis remains horizontal but when X goes vertical, it can't tell
the difference between X and Z.
Any suggestions would be greatly appreciated.
Thank you in advance.
-Clara
===========================================================================
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".
