How to draw a specific object with a different projection than other objects?

So I haven't been able to find anything on this anywhere: I'm using Java3D to create an environment for my users. I'd like to put a 3D display of the X, Y, and Z axis in the corner that rotates as they rotate their vi开发者_运维问答ew. Unfortunately, it needs to be in the corner instead of right in the center. This means that with the normal View projection (PERSPECTIVE_PROJECTION), the axis don't line up quite right and it looks really, really awkward. Using PARALLEL_PROJECTION instead fixes the awkward axis display, but then I can't view the world properly because it doesn't let me zoom anymore. Is there any way to tell the renderer to use PARALLEL_PROJECTION specifically for the axis display and PERSPECTIVE_PROJECTION on all other objects? Or is there another way around this problem I don't see?

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