Clara,
I had the same problem, but a Bilboard behavior attached at every label with
point as center of rotation ( wich was the center of the label ) solved my
problem.
Clara Dinh wrote:
> 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
>
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--
Best regards,
Dan Todor
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